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-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:48:32,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:48:32,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:48:32,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:48:32,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:48:32,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:48:32,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:48:32,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:48:32,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:48:32,826 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:48:32,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:48:32,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:48:32,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:48:32,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:48:32,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:48:32,835 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:48:32,836 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:48:32,837 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:48:32,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:48:32,842 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:48:32,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:48:32,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:48:32,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:48:32,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:48:32,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:48:32,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:48:32,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:48:32,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:48:32,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:48:32,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:48:32,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:48:32,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:48:32,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:48:32,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:48:32,870 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:48:32,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:48:32,874 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:48:32,895 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:48:32,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:48:32,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:48:32,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:48:32,897 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:48:32,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:48:32,897 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:48:32,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:48:32,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:48:32,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:48:32,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:48:32,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:48:32,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:48:32,898 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:48:32,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:48:32,899 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:48:32,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:48:32,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:48:32,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:48:32,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:48:32,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:48:32,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:48:32,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:48:32,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:48:32,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:48:32,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:48:32,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:48:32,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:48:32,901 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:48:33,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:48:33,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:48:33,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:48:33,242 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:48:33,243 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:48:33,243 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-10-13 17:48:33,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88306a471/a78434a15b7e403f9f7194359e5c9cf3/FLAGb2107c9d1 [2019-10-13 17:48:33,750 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:48:33,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-10-13 17:48:33,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88306a471/a78434a15b7e403f9f7194359e5c9cf3/FLAGb2107c9d1 [2019-10-13 17:48:34,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88306a471/a78434a15b7e403f9f7194359e5c9cf3 [2019-10-13 17:48:34,157 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:48:34,158 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:48:34,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:48:34,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:48:34,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:48:34,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:48:34" (1/1) ... [2019-10-13 17:48:34,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@343d4392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34, skipping insertion in model container [2019-10-13 17:48:34,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:48:34" (1/1) ... [2019-10-13 17:48:34,176 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:48:34,194 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:48:34,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:48:34,368 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:48:34,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:48:34,401 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:48:34,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34 WrapperNode [2019-10-13 17:48:34,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:48:34,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:48:34,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:48:34,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:48:34,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34" (1/1) ... [2019-10-13 17:48:34,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34" (1/1) ... [2019-10-13 17:48:34,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34" (1/1) ... [2019-10-13 17:48:34,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34" (1/1) ... [2019-10-13 17:48:34,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34" (1/1) ... [2019-10-13 17:48:34,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34" (1/1) ... [2019-10-13 17:48:34,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34" (1/1) ... [2019-10-13 17:48:34,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:48:34,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:48:34,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:48:34,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:48:34,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:48:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:48:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:48:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:48:34,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:48:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:48:34,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:48:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:48:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:48:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:48:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:48:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:48:34,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:48:34,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:48:34,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:48:34,858 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:48:34,859 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 17:48:34,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:48:34 BoogieIcfgContainer [2019-10-13 17:48:34,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:48:34,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:48:34,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:48:34,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:48:34,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:48:34" (1/3) ... [2019-10-13 17:48:34,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c2535cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:48:34, skipping insertion in model container [2019-10-13 17:48:34,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:48:34" (2/3) ... [2019-10-13 17:48:34,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c2535cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:48:34, skipping insertion in model container [2019-10-13 17:48:34,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:48:34" (3/3) ... [2019-10-13 17:48:34,883 INFO L109 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2019-10-13 17:48:34,901 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:48:34,910 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:48:34,926 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:48:34,976 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:48:34,976 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:48:34,976 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:48:34,976 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:48:34,977 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:48:34,977 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:48:34,977 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:48:34,977 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:48:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-13 17:48:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:48:35,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:35,008 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:35,011 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 547567586, now seen corresponding path program 1 times [2019-10-13 17:48:35,031 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:35,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247985681] [2019-10-13 17:48:35,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:35,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:35,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:35,204 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247985681] [2019-10-13 17:48:35,205 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:35,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:48:35,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443521095] [2019-10-13 17:48:35,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:48:35,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:48:35,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:48:35,230 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-13 17:48:35,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:35,332 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2019-10-13 17:48:35,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:48:35,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 17:48:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:35,344 INFO L225 Difference]: With dead ends: 43 [2019-10-13 17:48:35,344 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 17:48:35,348 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:48:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 17:48:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 17:48:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 17:48:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-10-13 17:48:35,406 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-10-13 17:48:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:35,407 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-10-13 17:48:35,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:48:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-10-13 17:48:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:48:35,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:35,411 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:35,411 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1443476915, now seen corresponding path program 1 times [2019-10-13 17:48:35,413 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:35,414 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458269865] [2019-10-13 17:48:35,414 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:35,414 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:35,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:35,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458269865] [2019-10-13 17:48:35,541 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:48:35,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:48:35,544 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582762514] [2019-10-13 17:48:35,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:48:35,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:35,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:48:35,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:48:35,548 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2019-10-13 17:48:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:35,665 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-10-13 17:48:35,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:48:35,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 17:48:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:35,669 INFO L225 Difference]: With dead ends: 41 [2019-10-13 17:48:35,670 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:48:35,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:48:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:48:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-10-13 17:48:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 17:48:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-13 17:48:35,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-10-13 17:48:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:35,693 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-13 17:48:35,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:48:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-13 17:48:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 17:48:35,695 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:35,696 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:35,696 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1901506806, now seen corresponding path program 1 times [2019-10-13 17:48:35,697 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:35,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948690431] [2019-10-13 17:48:35,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:35,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:35,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:35,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948690431] [2019-10-13 17:48:35,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299802396] [2019-10-13 17:48:35,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:35,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:48:35,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:35,923 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:35,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:48:35,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322610192] [2019-10-13 17:48:35,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:48:35,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:35,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:48:35,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:48:35,925 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 6 states. [2019-10-13 17:48:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:36,031 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2019-10-13 17:48:36,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:48:36,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-13 17:48:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:36,033 INFO L225 Difference]: With dead ends: 49 [2019-10-13 17:48:36,033 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 17:48:36,034 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:48:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 17:48:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2019-10-13 17:48:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 17:48:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-13 17:48:36,041 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2019-10-13 17:48:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:36,042 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-13 17:48:36,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:48:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-13 17:48:36,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:48:36,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:36,043 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:36,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:36,248 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:36,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:36,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1958890195, now seen corresponding path program 2 times [2019-10-13 17:48:36,249 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:36,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656582227] [2019-10-13 17:48:36,250 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:36,250 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:36,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:36,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656582227] [2019-10-13 17:48:36,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827849600] [2019-10-13 17:48:36,364 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:36,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:48:36,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:36,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:48:36,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:36,451 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:36,451 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:48:36,451 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932231526] [2019-10-13 17:48:36,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:48:36,452 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:36,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:48:36,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:48:36,453 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2019-10-13 17:48:36,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:36,572 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2019-10-13 17:48:36,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:48:36,572 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-10-13 17:48:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:36,573 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:48:36,574 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 17:48:36,574 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:48:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 17:48:36,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2019-10-13 17:48:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:48:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-13 17:48:36,581 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2019-10-13 17:48:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:36,581 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-13 17:48:36,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:48:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-13 17:48:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 17:48:36,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:36,583 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:36,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:36,794 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:36,795 INFO L82 PathProgramCache]: Analyzing trace with hash -2070448086, now seen corresponding path program 3 times [2019-10-13 17:48:36,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:36,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980216294] [2019-10-13 17:48:36,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:36,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:36,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:36,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980216294] [2019-10-13 17:48:36,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619317208] [2019-10-13 17:48:36,877 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:36,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:48:36,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:36,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:48:36,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:36,948 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:36,948 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-13 17:48:36,948 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306209928] [2019-10-13 17:48:36,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:48:36,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:48:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:48:36,950 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2019-10-13 17:48:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:37,066 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2019-10-13 17:48:37,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:48:37,067 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-10-13 17:48:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:37,069 INFO L225 Difference]: With dead ends: 65 [2019-10-13 17:48:37,069 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 17:48:37,069 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:48:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 17:48:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2019-10-13 17:48:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 17:48:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-10-13 17:48:37,076 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 23 [2019-10-13 17:48:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:37,077 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-10-13 17:48:37,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:48:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-10-13 17:48:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:48:37,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:37,078 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:37,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:37,281 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:37,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1186891763, now seen corresponding path program 4 times [2019-10-13 17:48:37,282 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:37,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277811317] [2019-10-13 17:48:37,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:37,284 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:37,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:37,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277811317] [2019-10-13 17:48:37,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112154865] [2019-10-13 17:48:37,399 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:37,441 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:48:37,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:37,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:48:37,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:37,457 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:37,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:48:37,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597978749] [2019-10-13 17:48:37,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:48:37,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:37,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:48:37,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:48:37,459 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 9 states. [2019-10-13 17:48:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:37,582 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2019-10-13 17:48:37,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:48:37,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-10-13 17:48:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:37,584 INFO L225 Difference]: With dead ends: 73 [2019-10-13 17:48:37,584 INFO L226 Difference]: Without dead ends: 61 [2019-10-13 17:48:37,585 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:48:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-13 17:48:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2019-10-13 17:48:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:48:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-13 17:48:37,592 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2019-10-13 17:48:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:37,593 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-13 17:48:37,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:48:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-13 17:48:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 17:48:37,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:37,594 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:37,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:37,806 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:37,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1279936842, now seen corresponding path program 5 times [2019-10-13 17:48:37,807 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:37,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933962841] [2019-10-13 17:48:37,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:37,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:37,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:37,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933962841] [2019-10-13 17:48:37,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273923048] [2019-10-13 17:48:37,948 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:38,025 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:48:38,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:38,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:48:38,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:38,054 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:38,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 17:48:38,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761431852] [2019-10-13 17:48:38,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:48:38,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:48:38,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:48:38,056 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 10 states. [2019-10-13 17:48:38,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:38,254 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2019-10-13 17:48:38,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:48:38,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-10-13 17:48:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:38,256 INFO L225 Difference]: With dead ends: 81 [2019-10-13 17:48:38,256 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 17:48:38,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:48:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 17:48:38,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2019-10-13 17:48:38,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 17:48:38,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-10-13 17:48:38,268 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 29 [2019-10-13 17:48:38,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:38,269 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-10-13 17:48:38,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:48:38,269 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-10-13 17:48:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:48:38,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:38,270 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:38,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:38,474 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:38,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:38,474 INFO L82 PathProgramCache]: Analyzing trace with hash -614493459, now seen corresponding path program 6 times [2019-10-13 17:48:38,474 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:38,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061313716] [2019-10-13 17:48:38,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:38,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:38,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:38,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061313716] [2019-10-13 17:48:38,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232096387] [2019-10-13 17:48:38,582 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:38,665 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:48:38,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:38,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:48:38,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:38,683 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:38,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-13 17:48:38,683 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178504492] [2019-10-13 17:48:38,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:48:38,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:38,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:48:38,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:48:38,685 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 11 states. [2019-10-13 17:48:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:38,871 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2019-10-13 17:48:38,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:48:38,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-10-13 17:48:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:38,872 INFO L225 Difference]: With dead ends: 89 [2019-10-13 17:48:38,873 INFO L226 Difference]: Without dead ends: 77 [2019-10-13 17:48:38,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:48:38,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-13 17:48:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2019-10-13 17:48:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 17:48:38,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-10-13 17:48:38,887 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 32 [2019-10-13 17:48:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:38,888 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-10-13 17:48:38,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:48:38,888 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-10-13 17:48:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 17:48:38,889 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:38,889 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:39,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:39,106 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:39,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:39,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1717321110, now seen corresponding path program 7 times [2019-10-13 17:48:39,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:39,108 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568270420] [2019-10-13 17:48:39,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:39,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:39,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:39,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568270420] [2019-10-13 17:48:39,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233233587] [2019-10-13 17:48:39,240 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:39,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:48:39,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:39,301 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:39,301 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:48:39,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48793036] [2019-10-13 17:48:39,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:48:39,302 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:39,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:48:39,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:48:39,303 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 12 states. [2019-10-13 17:48:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:39,500 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2019-10-13 17:48:39,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:48:39,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-10-13 17:48:39,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:39,502 INFO L225 Difference]: With dead ends: 97 [2019-10-13 17:48:39,502 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 17:48:39,503 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:48:39,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 17:48:39,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 43. [2019-10-13 17:48:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 17:48:39,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2019-10-13 17:48:39,509 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 35 [2019-10-13 17:48:39,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:39,510 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2019-10-13 17:48:39,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:48:39,510 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2019-10-13 17:48:39,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 17:48:39,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:39,511 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:39,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:39,720 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:39,720 INFO L82 PathProgramCache]: Analyzing trace with hash 443942349, now seen corresponding path program 8 times [2019-10-13 17:48:39,720 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:39,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969430084] [2019-10-13 17:48:39,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:39,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:39,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:39,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969430084] [2019-10-13 17:48:39,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530798958] [2019-10-13 17:48:39,864 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:39,920 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:48:39,921 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:39,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:48:39,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:39,950 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:39,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:48:39,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398479775] [2019-10-13 17:48:39,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:48:39,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:39,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:48:39,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:48:39,952 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 13 states. [2019-10-13 17:48:40,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:40,164 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2019-10-13 17:48:40,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:48:40,165 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-10-13 17:48:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:40,166 INFO L225 Difference]: With dead ends: 105 [2019-10-13 17:48:40,166 INFO L226 Difference]: Without dead ends: 93 [2019-10-13 17:48:40,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:48:40,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-13 17:48:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2019-10-13 17:48:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 17:48:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2019-10-13 17:48:40,173 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 38 [2019-10-13 17:48:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:40,174 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2019-10-13 17:48:40,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:48:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2019-10-13 17:48:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 17:48:40,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:40,175 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:40,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:40,380 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash 788915082, now seen corresponding path program 9 times [2019-10-13 17:48:40,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:40,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783906740] [2019-10-13 17:48:40,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:40,381 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:40,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:40,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783906740] [2019-10-13 17:48:40,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831711007] [2019-10-13 17:48:40,511 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:41,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-13 17:48:41,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:41,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:48:41,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:41,253 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:41,253 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:41,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-13 17:48:41,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316857842] [2019-10-13 17:48:41,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:48:41,254 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:41,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:48:41,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:48:41,255 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 14 states. [2019-10-13 17:48:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:41,494 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2019-10-13 17:48:41,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:48:41,495 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2019-10-13 17:48:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:41,496 INFO L225 Difference]: With dead ends: 113 [2019-10-13 17:48:41,496 INFO L226 Difference]: Without dead ends: 101 [2019-10-13 17:48:41,497 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:48:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-13 17:48:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 49. [2019-10-13 17:48:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:48:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2019-10-13 17:48:41,504 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 41 [2019-10-13 17:48:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:41,504 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2019-10-13 17:48:41,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:48:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2019-10-13 17:48:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:48:41,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:41,506 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:41,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:41,719 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:41,720 INFO L82 PathProgramCache]: Analyzing trace with hash 14864557, now seen corresponding path program 10 times [2019-10-13 17:48:41,720 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:41,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278295340] [2019-10-13 17:48:41,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:41,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:41,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:41,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278295340] [2019-10-13 17:48:41,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778319647] [2019-10-13 17:48:41,852 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:41,904 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:48:41,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:41,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:48:41,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:41,939 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:41,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:48:41,940 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756466668] [2019-10-13 17:48:41,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:48:41,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:41,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:48:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:48:41,941 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 15 states. [2019-10-13 17:48:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:42,185 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2019-10-13 17:48:42,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:48:42,185 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2019-10-13 17:48:42,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:42,186 INFO L225 Difference]: With dead ends: 121 [2019-10-13 17:48:42,187 INFO L226 Difference]: Without dead ends: 109 [2019-10-13 17:48:42,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:48:42,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-10-13 17:48:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 52. [2019-10-13 17:48:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 17:48:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2019-10-13 17:48:42,194 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 44 [2019-10-13 17:48:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:42,194 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2019-10-13 17:48:42,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:48:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2019-10-13 17:48:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 17:48:42,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:42,196 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:42,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:42,400 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash -44913494, now seen corresponding path program 11 times [2019-10-13 17:48:42,401 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:42,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179466143] [2019-10-13 17:48:42,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:42,402 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:42,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:42,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:42,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179466143] [2019-10-13 17:48:42,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940209126] [2019-10-13 17:48:42,595 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:44,627 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 17:48:44,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:44,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:48:44,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:44,669 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:44,674 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:48:44,674 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446544672] [2019-10-13 17:48:44,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:48:44,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:44,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:48:44,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:48:44,676 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 16 states. [2019-10-13 17:48:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:44,972 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2019-10-13 17:48:44,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:48:44,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2019-10-13 17:48:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:44,973 INFO L225 Difference]: With dead ends: 129 [2019-10-13 17:48:44,974 INFO L226 Difference]: Without dead ends: 117 [2019-10-13 17:48:44,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:48:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-13 17:48:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2019-10-13 17:48:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:48:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2019-10-13 17:48:44,982 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 47 [2019-10-13 17:48:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:44,982 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2019-10-13 17:48:44,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:48:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2019-10-13 17:48:44,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:48:44,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:44,983 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:45,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:45,185 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:45,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1518597005, now seen corresponding path program 12 times [2019-10-13 17:48:45,186 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:45,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070097172] [2019-10-13 17:48:45,186 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:45,187 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:45,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:45,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070097172] [2019-10-13 17:48:45,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067308631] [2019-10-13 17:48:45,349 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:46,132 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:48:46,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:46,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:48:46,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:46,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:46,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-13 17:48:46,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516211939] [2019-10-13 17:48:46,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:48:46,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:46,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:48:46,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:48:46,173 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand 17 states. [2019-10-13 17:48:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:46,475 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2019-10-13 17:48:46,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:48:46,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2019-10-13 17:48:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:46,481 INFO L225 Difference]: With dead ends: 137 [2019-10-13 17:48:46,481 INFO L226 Difference]: Without dead ends: 125 [2019-10-13 17:48:46,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:48:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-13 17:48:46,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 58. [2019-10-13 17:48:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-13 17:48:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2019-10-13 17:48:46,493 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 50 [2019-10-13 17:48:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:46,494 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2019-10-13 17:48:46,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:48:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2019-10-13 17:48:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-13 17:48:46,498 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:46,498 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:46,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:46,703 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1139547594, now seen corresponding path program 13 times [2019-10-13 17:48:46,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:46,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572066517] [2019-10-13 17:48:46,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:46,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:46,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:46,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572066517] [2019-10-13 17:48:46,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765585507] [2019-10-13 17:48:46,865 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:46,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:46,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:48:46,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:46,976 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:46,977 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:48:46,977 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556428279] [2019-10-13 17:48:46,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:48:46,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:48:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:48:46,978 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand 18 states. [2019-10-13 17:48:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:47,246 INFO L93 Difference]: Finished difference Result 145 states and 192 transitions. [2019-10-13 17:48:47,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:48:47,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2019-10-13 17:48:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:47,248 INFO L225 Difference]: With dead ends: 145 [2019-10-13 17:48:47,249 INFO L226 Difference]: Without dead ends: 133 [2019-10-13 17:48:47,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:48:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-13 17:48:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2019-10-13 17:48:47,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:48:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2019-10-13 17:48:47,258 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 53 [2019-10-13 17:48:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:47,259 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2019-10-13 17:48:47,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:48:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2019-10-13 17:48:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:48:47,261 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:47,261 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:47,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:47,465 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:47,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:47,466 INFO L82 PathProgramCache]: Analyzing trace with hash 347565677, now seen corresponding path program 14 times [2019-10-13 17:48:47,466 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:47,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23324023] [2019-10-13 17:48:47,467 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:47,468 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:47,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:47,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23324023] [2019-10-13 17:48:47,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986506537] [2019-10-13 17:48:47,648 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:47,703 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:48:47,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:47,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:48:47,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:47,723 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:47,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:48:47,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940909575] [2019-10-13 17:48:47,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:48:47,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:47,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:48:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:48:47,725 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 19 states. [2019-10-13 17:48:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:48,036 INFO L93 Difference]: Finished difference Result 153 states and 203 transitions. [2019-10-13 17:48:48,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:48:48,037 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2019-10-13 17:48:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:48,039 INFO L225 Difference]: With dead ends: 153 [2019-10-13 17:48:48,039 INFO L226 Difference]: Without dead ends: 141 [2019-10-13 17:48:48,039 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:48:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-13 17:48:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 64. [2019-10-13 17:48:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-13 17:48:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2019-10-13 17:48:48,047 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 56 [2019-10-13 17:48:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:48,048 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2019-10-13 17:48:48,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:48:48,048 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2019-10-13 17:48:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 17:48:48,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:48,049 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:48,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:48,251 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:48,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1330366742, now seen corresponding path program 15 times [2019-10-13 17:48:48,252 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:48,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570789917] [2019-10-13 17:48:48,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:48,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:48,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:48,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570789917] [2019-10-13 17:48:48,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376657503] [2019-10-13 17:48:48,467 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:51,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-13 17:48:51,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:51,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 17:48:51,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:51,526 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:51,526 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-13 17:48:51,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914559021] [2019-10-13 17:48:51,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:48:51,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:51,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:48:51,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:48:51,528 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 20 states. [2019-10-13 17:48:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:51,852 INFO L93 Difference]: Finished difference Result 161 states and 214 transitions. [2019-10-13 17:48:51,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:48:51,853 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2019-10-13 17:48:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:51,854 INFO L225 Difference]: With dead ends: 161 [2019-10-13 17:48:51,854 INFO L226 Difference]: Without dead ends: 149 [2019-10-13 17:48:51,855 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:48:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-10-13 17:48:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2019-10-13 17:48:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 17:48:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2019-10-13 17:48:51,861 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 59 [2019-10-13 17:48:51,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:51,862 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2019-10-13 17:48:51,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:48:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2019-10-13 17:48:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 17:48:51,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:51,863 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:52,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:52,069 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash 509296973, now seen corresponding path program 16 times [2019-10-13 17:48:52,070 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:52,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967675321] [2019-10-13 17:48:52,071 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:52,071 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:52,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:52,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967675321] [2019-10-13 17:48:52,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206640273] [2019-10-13 17:48:52,284 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:52,343 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:48:52,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:48:52,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:48:52,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:48:52,365 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:52,383 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:48:52,383 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:48:52,383 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56510832] [2019-10-13 17:48:52,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:48:52,383 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:48:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:48:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:48:52,384 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand 21 states. [2019-10-13 17:48:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:48:52,698 INFO L93 Difference]: Finished difference Result 169 states and 225 transitions. [2019-10-13 17:48:52,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:48:52,698 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 62 [2019-10-13 17:48:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:48:52,699 INFO L225 Difference]: With dead ends: 169 [2019-10-13 17:48:52,699 INFO L226 Difference]: Without dead ends: 157 [2019-10-13 17:48:52,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:48:52,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-13 17:48:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 70. [2019-10-13 17:48:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-13 17:48:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2019-10-13 17:48:52,706 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 62 [2019-10-13 17:48:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:48:52,706 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2019-10-13 17:48:52,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:48:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2019-10-13 17:48:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 17:48:52,707 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:48:52,707 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:48:52,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:48:52,911 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:48:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:48:52,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2146633718, now seen corresponding path program 17 times [2019-10-13 17:48:52,911 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:48:52,912 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373012295] [2019-10-13 17:48:52,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:52,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:48:52,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:48:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:48:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:48:53,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373012295] [2019-10-13 17:48:53,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209656387] [2019-10-13 17:48:53,152 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:15,458 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-13 17:49:15,458 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:15,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:49:15,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:15,489 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:49:15,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-13 17:49:15,489 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983996685] [2019-10-13 17:49:15,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:49:15,490 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:49:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:49:15,491 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 22 states. [2019-10-13 17:49:15,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:15,866 INFO L93 Difference]: Finished difference Result 177 states and 236 transitions. [2019-10-13 17:49:15,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:49:15,867 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 65 [2019-10-13 17:49:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:15,868 INFO L225 Difference]: With dead ends: 177 [2019-10-13 17:49:15,868 INFO L226 Difference]: Without dead ends: 165 [2019-10-13 17:49:15,869 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:49:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-13 17:49:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 73. [2019-10-13 17:49:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:49:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2019-10-13 17:49:15,877 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 65 [2019-10-13 17:49:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:15,877 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2019-10-13 17:49:15,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:49:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2019-10-13 17:49:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 17:49:15,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:15,878 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:16,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:16,090 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:16,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1204644909, now seen corresponding path program 18 times [2019-10-13 17:49:16,092 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:16,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771851490] [2019-10-13 17:49:16,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:16,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:16,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:16,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771851490] [2019-10-13 17:49:16,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764145888] [2019-10-13 17:49:16,369 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true