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_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:09,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:09,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:09,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:09,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:09,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:09,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:09,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:09,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:09,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:09,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:09,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:09,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:09,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:09,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:09,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:09,761 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:09,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:09,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:09,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:09,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:09,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:09,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:09,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:09,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:09,774 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:09,774 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:09,775 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:09,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:09,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:09,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:09,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:09,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:09,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:09,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:09,780 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:09,780 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 21:45:09,794 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:09,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:09,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:09,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:09,796 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:09,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:09,796 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:09,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:09,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:09,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:09,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:09,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:09,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:09,797 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:09,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:09,798 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:09,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:09,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:09,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:09,799 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:09,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:09,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:09,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:09,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:09,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:09,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:09,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:09,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:09,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:10,062 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:10,080 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:10,084 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:10,085 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:10,085 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:10,086 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2019-10-14 21:45:10,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbe86306f/b1399b7fce28423e9f4e9ac9b99d7ba6/FLAGf8cbc5481 [2019-10-14 21:45:10,618 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:10,619 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2019-10-14 21:45:10,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbe86306f/b1399b7fce28423e9f4e9ac9b99d7ba6/FLAGf8cbc5481 [2019-10-14 21:45:11,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbe86306f/b1399b7fce28423e9f4e9ac9b99d7ba6 [2019-10-14 21:45:11,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:11,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:11,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:11,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:11,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:11,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d5d6786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11, skipping insertion in model container [2019-10-14 21:45:11,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,062 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:11,079 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:11,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:11,285 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:11,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:11,325 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:11,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11 WrapperNode [2019-10-14 21:45:11,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:11,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:11,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:11,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:11,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (1/1) ... [2019-10-14 21:45:11,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:11,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:11,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:11,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:11,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (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 21:45:11,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:11,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:11,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:11,497 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:11,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:11,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:11,765 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:11,766 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:45:11,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:11 BoogieIcfgContainer [2019-10-14 21:45:11,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:11,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:11,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:11,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:11,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:11" (1/3) ... [2019-10-14 21:45:11,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d64203b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:11, skipping insertion in model container [2019-10-14 21:45:11,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:11" (2/3) ... [2019-10-14 21:45:11,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d64203b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:11, skipping insertion in model container [2019-10-14 21:45:11,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:11" (3/3) ... [2019-10-14 21:45:11,792 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2019-10-14 21:45:11,816 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:11,827 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:11,846 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:11,868 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:11,868 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:11,868 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:11,868 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:11,868 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:11,869 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:11,869 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:11,869 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-14 21:45:11,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:45:11,889 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,890 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:11,892 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1916738342, now seen corresponding path program 1 times [2019-10-14 21:45:11,902 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:11,903 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336298777] [2019-10-14 21:45:11,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,903 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,070 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 21:45:12,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336298777] [2019-10-14 21:45:12,077 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:12,077 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:12,078 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690584364] [2019-10-14 21:45:12,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:12,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:12,094 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2019-10-14 21:45:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,238 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2019-10-14 21:45:12,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:12,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-10-14 21:45:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,251 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:45:12,251 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 21:45:12,256 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 21:45:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 21:45:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 21:45:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:45:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-14 21:45:12,303 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 27 [2019-10-14 21:45:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,304 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-14 21:45:12,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-14 21:45:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:45:12,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,307 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:12,309 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,310 INFO L82 PathProgramCache]: Analyzing trace with hash -330794466, now seen corresponding path program 1 times [2019-10-14 21:45:12,310 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945866024] [2019-10-14 21:45:12,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,406 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 21:45:12,406 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945866024] [2019-10-14 21:45:12,407 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:12,407 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:12,407 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723286858] [2019-10-14 21:45:12,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:12,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:12,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:12,410 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-10-14 21:45:12,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,555 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2019-10-14 21:45:12,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:12,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-14 21:45:12,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,557 INFO L225 Difference]: With dead ends: 65 [2019-10-14 21:45:12,557 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:45:12,559 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 21:45:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:45:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:45:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:45:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-10-14 21:45:12,568 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2019-10-14 21:45:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,568 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-10-14 21:45:12,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-10-14 21:45:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:45:12,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,570 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:12,570 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1167956326, now seen corresponding path program 1 times [2019-10-14 21:45:12,571 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009097907] [2019-10-14 21:45:12,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:45:12,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009097907] [2019-10-14 21:45:12,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232148770] [2019-10-14 21:45:12,707 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 21:45:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:12,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:45:12,831 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:12,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:12,832 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765755920] [2019-10-14 21:45:12,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:12,833 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:12,834 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2019-10-14 21:45:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,026 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2019-10-14 21:45:13,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:13,027 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-10-14 21:45:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,029 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:45:13,030 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:45:13,030 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 21:45:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:45:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 21:45:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:45:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-10-14 21:45:13,045 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 35 [2019-10-14 21:45:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,046 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-10-14 21:45:13,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-10-14 21:45:13,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:45:13,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,052 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:13,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,256 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1255820446, now seen corresponding path program 2 times [2019-10-14 21:45:13,258 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112292816] [2019-10-14 21:45:13,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,259 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:45:13,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112292816] [2019-10-14 21:45:13,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141820771] [2019-10-14 21:45:13,387 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 21:45:13,441 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:13,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:13,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:13,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:45:13,464 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:13,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:13,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266055087] [2019-10-14 21:45:13,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:13,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:13,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:13,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:13,467 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 7 states. [2019-10-14 21:45:13,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:13,652 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2019-10-14 21:45:13,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:13,652 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-10-14 21:45:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:13,656 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:45:13,656 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:45:13,657 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 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 21:45:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:45:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-14 21:45:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:45:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2019-10-14 21:45:13,675 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2019-10-14 21:45:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:13,676 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2019-10-14 21:45:13,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2019-10-14 21:45:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:45:13,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:13,679 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:13,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:13,881 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:13,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:13,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2017193242, now seen corresponding path program 3 times [2019-10-14 21:45:13,882 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:13,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116172914] [2019-10-14 21:45:13,882 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:13,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 21:45:14,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116172914] [2019-10-14 21:45:14,014 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613294112] [2019-10-14 21:45:14,014 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 21:45:14,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:14,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:14,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:14,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 21:45:14,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:14,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:14,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200966269] [2019-10-14 21:45:14,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:14,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:14,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:14,145 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2019-10-14 21:45:14,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:14,315 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2019-10-14 21:45:14,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:14,316 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-10-14 21:45:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:14,317 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:45:14,317 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:45:14,318 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:45:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-10-14 21:45:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:45:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-10-14 21:45:14,328 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 51 [2019-10-14 21:45:14,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:14,328 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-10-14 21:45:14,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-10-14 21:45:14,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:45:14,330 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:14,330 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:14,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:14,535 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:14,536 INFO L82 PathProgramCache]: Analyzing trace with hash 544374558, now seen corresponding path program 4 times [2019-10-14 21:45:14,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:14,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000467810] [2019-10-14 21:45:14,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:14,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:45:14,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000467810] [2019-10-14 21:45:14,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496321910] [2019-10-14 21:45:14,691 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:14,753 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:14,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:14,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:14,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:45:14,782 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:14,782 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:14,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785128315] [2019-10-14 21:45:14,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:14,783 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:14,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:14,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:14,784 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 9 states. [2019-10-14 21:45:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:14,967 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2019-10-14 21:45:14,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:14,967 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2019-10-14 21:45:14,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:14,968 INFO L225 Difference]: With dead ends: 125 [2019-10-14 21:45:14,969 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:45:14,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 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 21:45:14,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:45:14,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-10-14 21:45:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:45:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2019-10-14 21:45:14,978 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 59 [2019-10-14 21:45:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:14,978 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2019-10-14 21:45:14,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2019-10-14 21:45:14,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:45:14,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:14,980 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:15,180 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:15,181 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:15,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:15,181 INFO L82 PathProgramCache]: Analyzing trace with hash 325227418, now seen corresponding path program 5 times [2019-10-14 21:45:15,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:15,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392723464] [2019-10-14 21:45:15,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:15,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:15,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 21:45:15,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392723464] [2019-10-14 21:45:15,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525033546] [2019-10-14 21:45:15,326 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:24,208 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:45:24,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:24,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:45:24,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 21:45:24,240 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:24,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:45:24,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30905008] [2019-10-14 21:45:24,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:45:24,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:24,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:45:24,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:24,242 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 10 states. [2019-10-14 21:45:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:24,452 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2019-10-14 21:45:24,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:45:24,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-10-14 21:45:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:24,453 INFO L225 Difference]: With dead ends: 140 [2019-10-14 21:45:24,453 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 21:45:24,457 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 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 21:45:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 21:45:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-10-14 21:45:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-14 21:45:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2019-10-14 21:45:24,468 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 67 [2019-10-14 21:45:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:24,468 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2019-10-14 21:45:24,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:45:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2019-10-14 21:45:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 21:45:24,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:24,470 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:24,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:24,681 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1206981022, now seen corresponding path program 6 times [2019-10-14 21:45:24,682 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:24,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912281376] [2019-10-14 21:45:24,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:24,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:24,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:45:24,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912281376] [2019-10-14 21:45:24,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22233265] [2019-10-14 21:45:24,842 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:26,104 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:45:26,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:26,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:45:26,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:45:26,129 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:26,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:45:26,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782781938] [2019-10-14 21:45:26,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:45:26,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:26,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:45:26,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:26,131 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 11 states. [2019-10-14 21:45:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:26,338 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2019-10-14 21:45:26,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:45:26,338 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2019-10-14 21:45:26,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:26,340 INFO L225 Difference]: With dead ends: 155 [2019-10-14 21:45:26,340 INFO L226 Difference]: Without dead ends: 88 [2019-10-14 21:45:26,341 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-14 21:45:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-10-14 21:45:26,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 21:45:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2019-10-14 21:45:26,356 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 75 [2019-10-14 21:45:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:26,356 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2019-10-14 21:45:26,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:45:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2019-10-14 21:45:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:45:26,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:26,360 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:26,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:26,563 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:26,564 INFO L82 PathProgramCache]: Analyzing trace with hash 192305690, now seen corresponding path program 7 times [2019-10-14 21:45:26,564 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:26,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93668559] [2019-10-14 21:45:26,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:26,565 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:26,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:45:26,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93668559] [2019-10-14 21:45:26,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818762126] [2019-10-14 21:45:26,691 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:26,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:26,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-14 21:45:26,801 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:26,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:45:26,801 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110973294] [2019-10-14 21:45:26,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:26,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:26,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:26,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:26,805 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 12 states. [2019-10-14 21:45:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:27,031 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2019-10-14 21:45:27,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:45:27,032 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2019-10-14 21:45:27,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:27,033 INFO L225 Difference]: With dead ends: 170 [2019-10-14 21:45:27,033 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 21:45:27,034 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 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 21:45:27,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 21:45:27,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-10-14 21:45:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-10-14 21:45:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2019-10-14 21:45:27,044 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 83 [2019-10-14 21:45:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:27,045 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2019-10-14 21:45:27,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:27,046 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2019-10-14 21:45:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 21:45:27,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:27,047 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:27,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:27,251 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:27,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:27,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1640627170, now seen corresponding path program 8 times [2019-10-14 21:45:27,252 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:27,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118074348] [2019-10-14 21:45:27,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:27,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:27,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-10-14 21:45:27,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118074348] [2019-10-14 21:45:27,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474057699] [2019-10-14 21:45:27,379 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:27,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:27,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:27,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:27,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-10-14 21:45:27,518 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:27,519 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:45:27,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442483870] [2019-10-14 21:45:27,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:45:27,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:27,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:45:27,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:27,522 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 13 states. [2019-10-14 21:45:27,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:27,783 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2019-10-14 21:45:27,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:27,784 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2019-10-14 21:45:27,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:27,785 INFO L225 Difference]: With dead ends: 185 [2019-10-14 21:45:27,785 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 21:45:27,786 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 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 21:45:27,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 21:45:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-14 21:45:27,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-14 21:45:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2019-10-14 21:45:27,808 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 91 [2019-10-14 21:45:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:27,809 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2019-10-14 21:45:27,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:45:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2019-10-14 21:45:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 21:45:27,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:27,811 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:28,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:28,012 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:28,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:28,013 INFO L82 PathProgramCache]: Analyzing trace with hash -32030566, now seen corresponding path program 9 times [2019-10-14 21:45:28,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:28,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017062583] [2019-10-14 21:45:28,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:28,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:28,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-10-14 21:45:28,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017062583] [2019-10-14 21:45:28,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008754522] [2019-10-14 21:45:28,193 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:50,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:45:50,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:50,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:45:50,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-10-14 21:45:50,316 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:50,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:45:50,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585111822] [2019-10-14 21:45:50,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:45:50,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:45:50,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:50,319 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 14 states. [2019-10-14 21:45:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:50,532 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2019-10-14 21:45:50,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:45:50,532 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2019-10-14 21:45:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:50,533 INFO L225 Difference]: With dead ends: 200 [2019-10-14 21:45:50,533 INFO L226 Difference]: Without dead ends: 112 [2019-10-14 21:45:50,534 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-14 21:45:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-10-14 21:45:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-14 21:45:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2019-10-14 21:45:50,541 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 99 [2019-10-14 21:45:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:50,542 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2019-10-14 21:45:50,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:45:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2019-10-14 21:45:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 21:45:50,543 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:50,544 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:50,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:50,758 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:50,758 INFO L82 PathProgramCache]: Analyzing trace with hash 35739294, now seen corresponding path program 10 times [2019-10-14 21:45:50,758 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:50,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927585708] [2019-10-14 21:45:50,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:50,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:50,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-10-14 21:45:50,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927585708] [2019-10-14 21:45:50,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865974399] [2019-10-14 21:45:50,940 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:51,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:51,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:51,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:45:51,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-10-14 21:45:51,100 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:51,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:45:51,101 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559648884] [2019-10-14 21:45:51,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:51,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:51,102 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 15 states. [2019-10-14 21:45:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:51,365 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2019-10-14 21:45:51,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:51,366 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 107 [2019-10-14 21:45:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:51,367 INFO L225 Difference]: With dead ends: 215 [2019-10-14 21:45:51,367 INFO L226 Difference]: Without dead ends: 120 [2019-10-14 21:45:51,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 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 21:45:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-14 21:45:51,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2019-10-14 21:45:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-10-14 21:45:51,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2019-10-14 21:45:51,375 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 107 [2019-10-14 21:45:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:51,376 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2019-10-14 21:45:51,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2019-10-14 21:45:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 21:45:51,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:51,377 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:51,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:51,591 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:51,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1494923494, now seen corresponding path program 11 times [2019-10-14 21:45:51,591 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:51,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930570506] [2019-10-14 21:45:51,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:51,592 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:51,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-10-14 21:45:51,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930570506] [2019-10-14 21:45:51,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848323336] [2019-10-14 21:45:51,755 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true