java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:38,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:38,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:38,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:38,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:38,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:38,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:38,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:38,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:38,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:38,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:38,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:38,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:38,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:38,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:38,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:38,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:38,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:38,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:38,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:38,808 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:38,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:38,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:38,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:38,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:46:38,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:46:38,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:46:38,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:46:38,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:46:38,822 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:46:38,822 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:38,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:38,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:38,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:38,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:38,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:38,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:38,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:38,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:38,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:38,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:38,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:46:38,866 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:38,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:38,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:38,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:38,868 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:38,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:38,868 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:38,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:38,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:38,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:38,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:38,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:38,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:38,871 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:38,872 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:38,872 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:38,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:38,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:38,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:38,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:38,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:38,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:38,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:38,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:38,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:38,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:38,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:38,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:38,875 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:39,172 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:39,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:39,187 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:39,188 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:39,189 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:39,189 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_ground-1.i [2019-10-14 21:46:39,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a803fe114/24279c751b0e470b95ad17d141e9a461/FLAG44ccb553a [2019-10-14 21:46:39,665 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:39,666 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_strcpy_ground-1.i [2019-10-14 21:46:39,672 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a803fe114/24279c751b0e470b95ad17d141e9a461/FLAG44ccb553a [2019-10-14 21:46:40,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a803fe114/24279c751b0e470b95ad17d141e9a461 [2019-10-14 21:46:40,091 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:40,093 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:40,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:40,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:40,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:40,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:40" (1/1) ... [2019-10-14 21:46:40,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fc689a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40, skipping insertion in model container [2019-10-14 21:46:40,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:40" (1/1) ... [2019-10-14 21:46:40,108 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:40,127 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:40,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:40,313 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:40,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:40,352 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:40,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40 WrapperNode [2019-10-14 21:46:40,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:40,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:40,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:40,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:40,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40" (1/1) ... [2019-10-14 21:46:40,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40" (1/1) ... [2019-10-14 21:46:40,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40" (1/1) ... [2019-10-14 21:46:40,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40" (1/1) ... [2019-10-14 21:46:40,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40" (1/1) ... [2019-10-14 21:46:40,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40" (1/1) ... [2019-10-14 21:46:40,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40" (1/1) ... [2019-10-14 21:46:40,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:40,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:40,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:40,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:40,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:40,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:40,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:40,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:40,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:40,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:40,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:40,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:40,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:40,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:40,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:40,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:40,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:40,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:40,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:40,757 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:40,757 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:46:40,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:40 BoogieIcfgContainer [2019-10-14 21:46:40,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:40,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:40,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:40,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:40,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:40" (1/3) ... [2019-10-14 21:46:40,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363b4b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:40, skipping insertion in model container [2019-10-14 21:46:40,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:40" (2/3) ... [2019-10-14 21:46:40,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363b4b13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:40, skipping insertion in model container [2019-10-14 21:46:40,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:40" (3/3) ... [2019-10-14 21:46:40,766 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2019-10-14 21:46:40,776 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:40,784 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:40,803 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:40,842 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:40,842 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:40,842 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:40,843 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:40,843 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:40,843 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:40,843 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:40,843 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-14 21:46:40,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:46:40,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:40,880 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:40,887 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:40,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1224509072, now seen corresponding path program 1 times [2019-10-14 21:46:40,903 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:40,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259371136] [2019-10-14 21:46:40,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:40,904 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:40,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:41,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259371136] [2019-10-14 21:46:41,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:41,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:41,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131326691] [2019-10-14 21:46:41,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:41,078 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:41,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:41,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:41,091 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-14 21:46:41,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:41,185 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2019-10-14 21:46:41,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:41,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 21:46:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:41,197 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:46:41,197 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 21:46:41,203 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 [2019-10-14 21:46:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 21:46:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 21:46:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:46:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-10-14 21:46:41,240 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-10-14 21:46:41,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:41,241 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-10-14 21:46:41,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-10-14 21:46:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:46:41,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:41,243 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:41,243 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:41,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:41,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1351700691, now seen corresponding path program 1 times [2019-10-14 21:46:41,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:41,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454555284] [2019-10-14 21:46:41,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:46:41,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454555284] [2019-10-14 21:46:41,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:41,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:41,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705432953] [2019-10-14 21:46:41,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:41,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:41,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:41,321 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2019-10-14 21:46:41,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:41,411 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2019-10-14 21:46:41,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:41,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:46:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:41,413 INFO L225 Difference]: With dead ends: 36 [2019-10-14 21:46:41,413 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 21:46:41,414 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 [2019-10-14 21:46:41,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 21:46:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 21:46:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 21:46:41,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-14 21:46:41,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2019-10-14 21:46:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:41,421 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-14 21:46:41,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-14 21:46:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:46:41,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:41,423 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:41,423 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:41,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1495374293, now seen corresponding path program 1 times [2019-10-14 21:46:41,424 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:41,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118974806] [2019-10-14 21:46:41,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:41,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118974806] [2019-10-14 21:46:41,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:41,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:46:41,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709887602] [2019-10-14 21:46:41,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:46:41,556 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:41,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:46:41,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:46:41,557 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2019-10-14 21:46:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:41,625 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-10-14 21:46:41,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:46:41,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-14 21:46:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:41,628 INFO L225 Difference]: With dead ends: 37 [2019-10-14 21:46:41,628 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:46:41,629 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:46:41,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:46:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 21:46:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:46:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-14 21:46:41,634 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2019-10-14 21:46:41,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:41,635 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-14 21:46:41,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:46:41,635 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-14 21:46:41,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:41,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:41,636 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:41,637 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:41,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:41,637 INFO L82 PathProgramCache]: Analyzing trace with hash 967402426, now seen corresponding path program 1 times [2019-10-14 21:46:41,637 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:41,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109585085] [2019-10-14 21:46:41,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:41,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:41,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109585085] [2019-10-14 21:46:41,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498495694] [2019-10-14 21:46:41,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:41,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:41,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:41,858 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:41,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:46:41,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653191806] [2019-10-14 21:46:41,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:46:41,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:41,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:46:41,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:41,860 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2019-10-14 21:46:41,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:41,920 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 21:46:41,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:46:41,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:46:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:41,922 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:46:41,922 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:46:41,923 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:46:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:46:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:46:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:46:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-14 21:46:41,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2019-10-14 21:46:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:41,930 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-14 21:46:41,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:46:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-14 21:46:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:46:41,931 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:41,931 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:42,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:42,144 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:42,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1525237150, now seen corresponding path program 2 times [2019-10-14 21:46:42,145 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:42,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306837581] [2019-10-14 21:46:42,146 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:42,146 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:42,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:42,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306837581] [2019-10-14 21:46:42,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930411839] [2019-10-14 21:46:42,259 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:42,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:42,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:42,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:46:42,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:42,319 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:42,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:46:42,320 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931774159] [2019-10-14 21:46:42,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:42,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:42,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:42,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:42,321 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2019-10-14 21:46:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:42,390 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-14 21:46:42,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:46:42,391 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-10-14 21:46:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:42,392 INFO L225 Difference]: With dead ends: 44 [2019-10-14 21:46:42,392 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:46:42,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:46:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:46:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:46:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-14 21:46:42,398 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2019-10-14 21:46:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:42,399 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-14 21:46:42,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-14 21:46:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:46:42,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:42,400 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:42,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:42,609 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:42,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1487652678, now seen corresponding path program 3 times [2019-10-14 21:46:42,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:42,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792768389] [2019-10-14 21:46:42,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:42,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:42,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:46:42,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792768389] [2019-10-14 21:46:42,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964156336] [2019-10-14 21:46:42,690 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:42,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:46:42,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:42,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:46:42,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:42,797 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:46:42,798 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:42,806 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:42,807 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:42,807 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-10-14 21:46:42,845 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2019-10-14 21:46:42,846 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:42,855 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:42,855 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:42,855 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2019-10-14 21:46:42,911 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-14 21:46:42,912 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:42,916 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:42,917 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:42,917 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-14 21:46:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:46:42,960 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:42,961 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2019-10-14 21:46:42,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067307818] [2019-10-14 21:46:42,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:42,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:42,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:42,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:42,963 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 13 states. [2019-10-14 21:46:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:43,306 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2019-10-14 21:46:43,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:46:43,306 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-10-14 21:46:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:43,307 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:46:43,308 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:46:43,308 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:46:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:46:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-10-14 21:46:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:46:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-14 21:46:43,316 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2019-10-14 21:46:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:43,317 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-14 21:46:43,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-14 21:46:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:46:43,319 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:43,319 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:43,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:43,520 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:43,521 INFO L82 PathProgramCache]: Analyzing trace with hash -19978727, now seen corresponding path program 1 times [2019-10-14 21:46:43,521 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:43,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247564281] [2019-10-14 21:46:43,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:43,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:43,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:43,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247564281] [2019-10-14 21:46:43,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535009358] [2019-10-14 21:46:43,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:43,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:46:43,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:46:43,727 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:43,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:46:43,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460335500] [2019-10-14 21:46:43,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:46:43,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:43,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:46:43,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:43,729 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2019-10-14 21:46:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:43,794 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-14 21:46:43,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:46:43,795 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-10-14 21:46:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:43,798 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:46:43,798 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 21:46:43,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:46:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 21:46:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-14 21:46:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:46:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-14 21:46:43,805 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2019-10-14 21:46:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:43,806 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-14 21:46:43,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:46:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-14 21:46:43,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:46:43,807 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:43,807 INFO L380 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:44,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:44,011 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:44,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:44,011 INFO L82 PathProgramCache]: Analyzing trace with hash -681273743, now seen corresponding path program 2 times [2019-10-14 21:46:44,012 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:44,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262487543] [2019-10-14 21:46:44,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:44,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:44,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:44,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262487543] [2019-10-14 21:46:44,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329003179] [2019-10-14 21:46:44,120 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:44,172 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:44,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:44,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:44,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:46:44,192 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:44,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:46:44,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566577949] [2019-10-14 21:46:44,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:44,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:44,194 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2019-10-14 21:46:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:44,260 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-10-14 21:46:44,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:46:44,260 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-10-14 21:46:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:44,262 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:46:44,262 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:46:44,262 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:46:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 21:46:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:46:44,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-14 21:46:44,269 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2019-10-14 21:46:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:44,270 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-14 21:46:44,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-14 21:46:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:46:44,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:44,271 INFO L380 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:44,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:44,480 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:44,480 INFO L82 PathProgramCache]: Analyzing trace with hash 293417241, now seen corresponding path program 3 times [2019-10-14 21:46:44,481 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:44,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147063746] [2019-10-14 21:46:44,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:44,481 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:44,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:46:44,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147063746] [2019-10-14 21:46:44,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565469354] [2019-10-14 21:46:44,586 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:44,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:46:44,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:44,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:46:44,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:44,720 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:44,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-14 21:46:44,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753184769] [2019-10-14 21:46:44,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:46:44,721 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:46:44,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:46:44,722 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 14 states. [2019-10-14 21:46:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:44,888 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2019-10-14 21:46:44,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:46:44,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2019-10-14 21:46:44,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:44,890 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:46:44,890 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:46:44,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:46:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:46:44,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:46:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:46:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-10-14 21:46:44,903 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2019-10-14 21:46:44,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:44,904 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-10-14 21:46:44,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:46:44,904 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-10-14 21:46:44,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:46:44,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:44,906 INFO L380 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:45,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:45,108 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:45,108 INFO L82 PathProgramCache]: Analyzing trace with hash 604607084, now seen corresponding path program 4 times [2019-10-14 21:46:45,109 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:45,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385924710] [2019-10-14 21:46:45,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:45,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:45,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:46:45,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385924710] [2019-10-14 21:46:45,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122441743] [2019-10-14 21:46:45,227 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:45,293 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:45,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:45,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:46:45,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:46:45,309 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:45,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:46:45,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472024228] [2019-10-14 21:46:45,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:46:45,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:45,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:46:45,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:45,311 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 12 states. [2019-10-14 21:46:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:45,389 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2019-10-14 21:46:45,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:45,389 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-14 21:46:45,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:45,390 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:46:45,391 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:46:45,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:46:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 21:46:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:46:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-14 21:46:45,399 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 37 [2019-10-14 21:46:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:45,399 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-14 21:46:45,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:46:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-14 21:46:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:46:45,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:45,401 INFO L380 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:45,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:45,605 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:45,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:45,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1643077828, now seen corresponding path program 5 times [2019-10-14 21:46:45,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:45,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441386951] [2019-10-14 21:46:45,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:45,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:45,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:46:45,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441386951] [2019-10-14 21:46:45,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558287571] [2019-10-14 21:46:45,734 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:45,847 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 21:46:45,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:45,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:46:45,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:46:45,873 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:45,873 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:46:45,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780061286] [2019-10-14 21:46:45,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:45,874 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:45,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:45,875 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 13 states. [2019-10-14 21:46:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:45,947 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2019-10-14 21:46:45,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:46:45,948 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-10-14 21:46:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:45,949 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:46:45,950 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:46:45,951 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:46:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-14 21:46:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:46:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2019-10-14 21:46:45,958 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 38 [2019-10-14 21:46:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:45,958 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2019-10-14 21:46:45,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:45,959 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2019-10-14 21:46:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:46:45,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:45,960 INFO L380 BasicCegarLoop]: trace histogram [9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:46,164 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:46,164 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash -524067476, now seen corresponding path program 6 times [2019-10-14 21:46:46,165 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:46,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153989860] [2019-10-14 21:46:46,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:46,166 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:46,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:46,296 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:46:46,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153989860] [2019-10-14 21:46:46,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9657979] [2019-10-14 21:46:46,297 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:46,354 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:46:46,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:46,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:46:46,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:46,369 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:46:46,369 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:46,376 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:46,377 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:46,377 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-10-14 21:46:46,421 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-10-14 21:46:46,421 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:46,428 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:46,429 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:46,429 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2019-10-14 21:46:48,492 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#src~0.base_BEFORE_CALL_1| Int) (|v_main_~#dst~0.base_BEFORE_CALL_1| Int)) (and (not (= |v_main_~#src~0.base_BEFORE_CALL_1| |v_main_~#dst~0.base_BEFORE_CALL_1|)) (= (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_1|) 4) (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_1|) 4)))) is different from true [2019-10-14 21:46:48,573 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-10-14 21:46:48,574 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:48,580 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:48,581 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:48,581 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2019-10-14 21:46:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 45 trivial. 2 not checked. [2019-10-14 21:46:48,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:48,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2019-10-14 21:46:48,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088822400] [2019-10-14 21:46:48,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:46:48,674 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:48,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:46:48,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=335, Unknown=1, NotChecked=38, Total=462 [2019-10-14 21:46:48,675 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 22 states. [2019-10-14 21:46:53,059 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-14 21:46:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:57,294 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2019-10-14 21:46:57,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:46:57,294 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 39 [2019-10-14 21:46:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:57,295 INFO L225 Difference]: With dead ends: 79 [2019-10-14 21:46:57,295 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:46:57,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=236, Invalid=954, Unknown=4, NotChecked=66, Total=1260 [2019-10-14 21:46:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:46:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-10-14 21:46:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:46:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-10-14 21:46:57,304 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 39 [2019-10-14 21:46:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:57,305 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-10-14 21:46:57,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:46:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-10-14 21:46:57,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:46:57,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:57,306 INFO L380 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:57,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:57,507 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:57,508 INFO L82 PathProgramCache]: Analyzing trace with hash -650505093, now seen corresponding path program 7 times [2019-10-14 21:46:57,508 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:57,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259263938] [2019-10-14 21:46:57,509 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,509 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:57,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:57,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259263938] [2019-10-14 21:46:57,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700547379] [2019-10-14 21:46:57,648 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 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 [2019-10-14 21:46:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:57,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:46:57,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:46:57,769 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:57,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:46:57,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944289837] [2019-10-14 21:46:57,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:46:57,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:57,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:46:57,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:57,772 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 15 states. [2019-10-14 21:46:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:57,912 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2019-10-14 21:46:57,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:46:57,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2019-10-14 21:46:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:57,914 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:46:57,915 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:46:57,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:46:57,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 21:46:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:46:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2019-10-14 21:46:57,936 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 48 [2019-10-14 21:46:57,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:57,936 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2019-10-14 21:46:57,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:46:57,937 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2019-10-14 21:46:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:46:57,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:57,939 INFO L380 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,152 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,152 INFO L82 PathProgramCache]: Analyzing trace with hash 39345955, now seen corresponding path program 8 times [2019-10-14 21:46:58,152 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766002086] [2019-10-14 21:46:58,152 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:58,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766002086] [2019-10-14 21:46:58,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952499270] [2019-10-14 21:46:58,299 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 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 [2019-10-14 21:46:58,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:58,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:58,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:46:58,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:46:58,394 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:58,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:46:58,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478129345] [2019-10-14 21:46:58,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:46:58,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:58,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:46:58,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:58,398 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 16 states. [2019-10-14 21:46:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,498 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2019-10-14 21:46:58,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:46:58,498 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2019-10-14 21:46:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,499 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:46:58,499 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:46:58,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:46:58,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-14 21:46:58,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:46:58,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2019-10-14 21:46:58,507 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 49 [2019-10-14 21:46:58,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,507 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2019-10-14 21:46:58,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:46:58,507 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2019-10-14 21:46:58,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 21:46:58,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,508 INFO L380 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:58,712 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash -50108037, now seen corresponding path program 9 times [2019-10-14 21:46:58,713 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785371433] [2019-10-14 21:46:58,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 4 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:46:58,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785371433] [2019-10-14 21:46:58,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983332124] [2019-10-14 21:46:58,912 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 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 [2019-10-14 21:46:58,980 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:58,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:58,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:58,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-14 21:46:59,114 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:59,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2019-10-14 21:46:59,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097216369] [2019-10-14 21:46:59,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:46:59,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:59,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:46:59,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:59,117 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 22 states. [2019-10-14 21:46:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:59,566 INFO L93 Difference]: Finished difference Result 101 states and 115 transitions. [2019-10-14 21:46:59,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:46:59,567 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2019-10-14 21:46:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:59,567 INFO L225 Difference]: With dead ends: 101 [2019-10-14 21:46:59,568 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:46:59,569 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=828, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:46:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:46:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-14 21:46:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:46:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2019-10-14 21:46:59,577 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 50 [2019-10-14 21:46:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:59,578 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2019-10-14 21:46:59,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:46:59,578 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2019-10-14 21:46:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-14 21:46:59,579 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:59,579 INFO L380 BasicCegarLoop]: trace histogram [13, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,783 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2059303352, now seen corresponding path program 10 times [2019-10-14 21:46:59,784 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,784 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626953991] [2019-10-14 21:46:59,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 91 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:46:59,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626953991] [2019-10-14 21:46:59,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281206878] [2019-10-14 21:46:59,972 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 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 [2019-10-14 21:47:00,035 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:00,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:00,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:47:00,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:47:00,056 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:00,056 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:47:00,056 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087636007] [2019-10-14 21:47:00,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:47:00,057 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:00,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:47:00,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:00,058 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand 18 states. [2019-10-14 21:47:00,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:00,176 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2019-10-14 21:47:00,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:47:00,177 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2019-10-14 21:47:00,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:00,178 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:47:00,178 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:47:00,179 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:47:00,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-10-14 21:47:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:47:00,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2019-10-14 21:47:00,185 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 54 [2019-10-14 21:47:00,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:00,186 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2019-10-14 21:47:00,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:47:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2019-10-14 21:47:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:47:00,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:00,187 INFO L380 BasicCegarLoop]: trace histogram [14, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:00,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,391 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:00,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash 605500144, now seen corresponding path program 11 times [2019-10-14 21:47:00,392 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:00,392 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731580987] [2019-10-14 21:47:00,392 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,393 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 105 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:47:00,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731580987] [2019-10-14 21:47:00,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253713100] [2019-10-14 21:47:00,590 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 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 [2019-10-14 21:47:00,934 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-14 21:47:00,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:00,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:47:00,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 21:47:00,964 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:00,965 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:47:00,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314140922] [2019-10-14 21:47:00,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:47:00,966 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:00,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:47:00,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:47:00,968 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 19 states. [2019-10-14 21:47:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:01,092 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2019-10-14 21:47:01,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:47:01,093 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2019-10-14 21:47:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:01,094 INFO L225 Difference]: With dead ends: 96 [2019-10-14 21:47:01,094 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:47:01,095 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:47:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:47:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-10-14 21:47:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 21:47:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2019-10-14 21:47:01,102 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 55 [2019-10-14 21:47:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:01,103 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2019-10-14 21:47:01,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:47:01,103 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2019-10-14 21:47:01,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:47:01,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:01,104 INFO L380 BasicCegarLoop]: trace histogram [15, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:01,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,304 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1610029896, now seen corresponding path program 12 times [2019-10-14 21:47:01,305 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:01,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054432879] [2019-10-14 21:47:01,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,545 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 120 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 21:47:01,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054432879] [2019-10-14 21:47:01,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642982741] [2019-10-14 21:47:01,546 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 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 [2019-10-14 21:47:01,719 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:47:01,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:01,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:47:01,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:01,730 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-10-14 21:47:01,730 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:01,737 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:01,738 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:01,738 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-10-14 21:47:01,801 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2019-10-14 21:47:01,801 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:01,812 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:01,813 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:47:01,813 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2019-10-14 21:47:03,918 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~i~0_16 Int) (|v_main_~#dst~0.base_BEFORE_CALL_2| Int) (|v_main_~#src~0.base_BEFORE_CALL_2| Int)) (and (let ((.cse0 (* v_main_~i~0_16 4))) (= (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_2|) .cse0) (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_2|) .cse0))) (not (= |v_main_~#src~0.base_BEFORE_CALL_2| |v_main_~#dst~0.base_BEFORE_CALL_2|)) (<= v_main_~i~0_16 2))) is different from true [2019-10-14 21:47:06,010 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~i~0_16 Int) (|v_main_~#dst~0.base_BEFORE_CALL_3| Int) (|v_main_~#src~0.base_BEFORE_CALL_3| Int)) (and (let ((.cse0 (* v_main_~i~0_16 4))) (= (select (select |c_#memory_int| |v_main_~#dst~0.base_BEFORE_CALL_3|) .cse0) (select (select |c_#memory_int| |v_main_~#src~0.base_BEFORE_CALL_3|) .cse0))) (<= v_main_~i~0_16 2) (not (= |v_main_~#src~0.base_BEFORE_CALL_3| |v_main_~#dst~0.base_BEFORE_CALL_3|)))) is different from true [2019-10-14 21:47:08,038 WARN L191 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 21 [2019-10-14 21:47:10,093 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 22 [2019-10-14 21:47:10,224 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 21:47:10,225 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2019-10-14 21:47:10,226 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:47:10,234 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:47:10,235 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:47:10,235 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:47, output treesize:3 [2019-10-14 21:47:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 120 trivial. 7 not checked. [2019-10-14 21:47:12,308 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:12,308 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2019-10-14 21:47:12,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479348660] [2019-10-14 21:47:12,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:47:12,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:12,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:47:12,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=745, Unknown=3, NotChecked=118, Total=1056 [2019-10-14 21:47:12,310 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 33 states. [2019-10-14 21:47:17,148 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 27 [2019-10-14 21:47:21,242 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2019-10-14 21:47:25,318 WARN L191 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 44 DAG size of output: 33