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_copy1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:43:10,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:43:10,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:43:10,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:43:10,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:43:10,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:43:10,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:43:10,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:43:10,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:43:10,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:43:10,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:43:10,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:43:10,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:43:10,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:43:10,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:43:10,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:43:10,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:43:10,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:43:10,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:43:10,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:43:10,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:43:10,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:43:10,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:43:10,479 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:43:10,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:43:10,494 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:43:10,495 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:43:10,496 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:43:10,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:43:10,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:43:10,500 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:43:10,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:43:10,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:43:10,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:43:10,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:43:10,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:43:10,507 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 21:43:10,536 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:43:10,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:43:10,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:43:10,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:43:10,541 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:43:10,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:43:10,541 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:43:10,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:43:10,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:43:10,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:43:10,542 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:43:10,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:43:10,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:43:10,542 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:43:10,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:43:10,543 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:43:10,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:43:10,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:43:10,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:43:10,543 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:43:10,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:43:10,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:43:10,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:43:10,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:43:10,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:43:10,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:43:10,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:43:10,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:43:10,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:43:10,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:43:10,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:43:10,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:43:10,844 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:43:10,845 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:43:10,845 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2019-10-14 21:43:10,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c72e8585/d251ee22eba34519adb0b6a72c9da706/FLAG1c06cde93 [2019-10-14 21:43:11,347 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:43:11,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-2.i [2019-10-14 21:43:11,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c72e8585/d251ee22eba34519adb0b6a72c9da706/FLAG1c06cde93 [2019-10-14 21:43:11,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c72e8585/d251ee22eba34519adb0b6a72c9da706 [2019-10-14 21:43:11,748 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:43:11,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:43:11,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:11,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:43:11,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:43:11,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:11" (1/1) ... [2019-10-14 21:43:11,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2e6592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:11, skipping insertion in model container [2019-10-14 21:43:11,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:43:11" (1/1) ... [2019-10-14 21:43:11,765 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:43:11,780 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:43:11,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:11,976 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:43:12,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:43:12,018 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:43:12,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12 WrapperNode [2019-10-14 21:43:12,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:43:12,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:43:12,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:43:12,019 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:43:12,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12" (1/1) ... [2019-10-14 21:43:12,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12" (1/1) ... [2019-10-14 21:43:12,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12" (1/1) ... [2019-10-14 21:43:12,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12" (1/1) ... [2019-10-14 21:43:12,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12" (1/1) ... [2019-10-14 21:43:12,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12" (1/1) ... [2019-10-14 21:43:12,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12" (1/1) ... [2019-10-14 21:43:12,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:43:12,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:43:12,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:43:12,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:43:12,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12" (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 21:43:12,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:43:12,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:43:12,194 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:43:12,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:43:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:43:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:43:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:43:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:43:12,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:43:12,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:43:12,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:43:12,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:43:12,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:43:12,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:43:12,449 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:43:12,450 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:43:12,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:12 BoogieIcfgContainer [2019-10-14 21:43:12,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:43:12,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:43:12,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:43:12,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:43:12,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:43:11" (1/3) ... [2019-10-14 21:43:12,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd17e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:12, skipping insertion in model container [2019-10-14 21:43:12,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:43:12" (2/3) ... [2019-10-14 21:43:12,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd17e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:43:12, skipping insertion in model container [2019-10-14 21:43:12,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:43:12" (3/3) ... [2019-10-14 21:43:12,469 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2019-10-14 21:43:12,484 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:43:12,498 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:43:12,514 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:43:12,548 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:43:12,548 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:43:12,548 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:43:12,548 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:43:12,549 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:43:12,549 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:43:12,549 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:43:12,549 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:43:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-14 21:43:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:43:12,573 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:12,574 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:12,575 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:12,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1778002988, now seen corresponding path program 1 times [2019-10-14 21:43:12,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:12,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411798911] [2019-10-14 21:43:12,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:12,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:12,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:12,771 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 21:43:12,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411798911] [2019-10-14 21:43:12,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:12,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:43:12,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81227435] [2019-10-14 21:43:12,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:43:12,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:12,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:43:12,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:43:12,798 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-14 21:43:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:12,935 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-10-14 21:43:12,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:43:12,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:43:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:12,948 INFO L225 Difference]: With dead ends: 46 [2019-10-14 21:43:12,948 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 21:43:12,953 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 21:43:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 21:43:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 21:43:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 21:43:12,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-14 21:43:12,998 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2019-10-14 21:43:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:12,999 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-14 21:43:12,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:43:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-14 21:43:13,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:43:13,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:13,000 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:13,001 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:13,002 INFO L82 PathProgramCache]: Analyzing trace with hash -262172122, now seen corresponding path program 1 times [2019-10-14 21:43:13,002 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:13,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853767582] [2019-10-14 21:43:13,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,127 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 21:43:13,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853767582] [2019-10-14 21:43:13,128 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:13,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:13,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055067498] [2019-10-14 21:43:13,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:13,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:13,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:13,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:13,136 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2019-10-14 21:43:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:13,227 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2019-10-14 21:43:13,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:13,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:43:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:13,230 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:43:13,230 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:43:13,231 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 21:43:13,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:43:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-14 21:43:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:43:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-14 21:43:13,245 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2019-10-14 21:43:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:13,246 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-14 21:43:13,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-14 21:43:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:43:13,249 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:13,249 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 21:43:13,250 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1578997828, now seen corresponding path program 1 times [2019-10-14 21:43:13,252 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:13,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114701291] [2019-10-14 21:43:13,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,253 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,360 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 21:43:13,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114701291] [2019-10-14 21:43:13,360 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:43:13,361 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:43:13,361 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099418978] [2019-10-14 21:43:13,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:43:13,362 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:13,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:43:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:43:13,363 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 4 states. [2019-10-14 21:43:13,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:13,425 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-10-14 21:43:13,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:43:13,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-10-14 21:43:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:13,428 INFO L225 Difference]: With dead ends: 36 [2019-10-14 21:43:13,428 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 21:43:13,428 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 21:43:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 21:43:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-14 21:43:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:43:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:43:13,439 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-10-14 21:43:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:13,439 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:43:13,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:43:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:43:13,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:43:13,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:13,441 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:13,441 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:13,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1323409058, now seen corresponding path program 1 times [2019-10-14 21:43:13,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:13,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281524835] [2019-10-14 21:43:13,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,442 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:13,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281524835] [2019-10-14 21:43:13,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214815253] [2019-10-14 21:43:13,542 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 21:43:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:43:13,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:43:13,647 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:13,647 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:43:13,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151591428] [2019-10-14 21:43:13,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:43:13,648 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:13,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:43:13,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:43:13,649 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2019-10-14 21:43:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:13,796 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-10-14 21:43:13,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:43:13,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-10-14 21:43:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:13,797 INFO L225 Difference]: With dead ends: 45 [2019-10-14 21:43:13,798 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:43:13,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:43:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:43:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-10-14 21:43:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:43:13,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 21:43:13,810 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2019-10-14 21:43:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:13,810 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 21:43:13,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:43:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 21:43:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:43:13,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:13,812 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:14,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:14,016 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1582955806, now seen corresponding path program 2 times [2019-10-14 21:43:14,017 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:14,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714910093] [2019-10-14 21:43:14,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:43:14,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714910093] [2019-10-14 21:43:14,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998901876] [2019-10-14 21:43:14,117 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 21:43:14,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:14,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:14,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:14,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:43:14,204 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:14,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:43:14,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340718423] [2019-10-14 21:43:14,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:43:14,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:43:14,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:43:14,206 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 7 states. [2019-10-14 21:43:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:14,271 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2019-10-14 21:43:14,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:43:14,271 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-10-14 21:43:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:14,272 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:43:14,272 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:43:14,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 21:43:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:43:14,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-14 21:43:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:43:14,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-10-14 21:43:14,279 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2019-10-14 21:43:14,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:14,280 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-10-14 21:43:14,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:43:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-10-14 21:43:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:43:14,281 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:14,281 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:14,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:14,486 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:14,487 INFO L82 PathProgramCache]: Analyzing trace with hash 683083068, now seen corresponding path program 3 times [2019-10-14 21:43:14,487 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:14,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425817134] [2019-10-14 21:43:14,488 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:14,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:43:14,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425817134] [2019-10-14 21:43:14,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930923551] [2019-10-14 21:43:14,588 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 21:43:14,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:43:14,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:14,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:43:14,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:43:14,680 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:14,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-14 21:43:14,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392927707] [2019-10-14 21:43:14,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:43:14,682 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:14,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:43:14,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:14,683 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2019-10-14 21:43:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:14,800 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2019-10-14 21:43:14,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:43:14,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2019-10-14 21:43:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:14,802 INFO L225 Difference]: With dead ends: 53 [2019-10-14 21:43:14,802 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:43:14,803 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:43:14,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:43:14,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-10-14 21:43:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 21:43:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-10-14 21:43:14,813 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2019-10-14 21:43:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:14,813 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-10-14 21:43:14,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:43:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-10-14 21:43:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:43:14,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:14,814 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:15,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:15,016 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1626114376, now seen corresponding path program 4 times [2019-10-14 21:43:15,017 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:15,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692290987] [2019-10-14 21:43:15,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:43:15,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692290987] [2019-10-14 21:43:15,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836548710] [2019-10-14 21:43:15,116 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 21:43:15,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:15,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:15,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:15,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:43:15,189 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:15,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:43:15,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484094849] [2019-10-14 21:43:15,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:43:15,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:15,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:43:15,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:43:15,191 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2019-10-14 21:43:15,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:15,274 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2019-10-14 21:43:15,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:43:15,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-10-14 21:43:15,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:15,275 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:43:15,276 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:43:15,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 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 21:43:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:43:15,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-14 21:43:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:43:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-14 21:43:15,282 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2019-10-14 21:43:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:15,283 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-14 21:43:15,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:43:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-14 21:43:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:43:15,284 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:15,284 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:15,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:15,494 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:15,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:15,494 INFO L82 PathProgramCache]: Analyzing trace with hash -729452458, now seen corresponding path program 5 times [2019-10-14 21:43:15,495 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:15,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016300188] [2019-10-14 21:43:15,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:43:15,619 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016300188] [2019-10-14 21:43:15,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003259370] [2019-10-14 21:43:15,620 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 21:43:15,698 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:43:15,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:15,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:43:15,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:43:15,746 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:15,747 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-10-14 21:43:15,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277173441] [2019-10-14 21:43:15,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:43:15,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:43:15,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:15,748 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2019-10-14 21:43:15,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:15,876 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2019-10-14 21:43:15,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:43:15,877 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2019-10-14 21:43:15,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:15,878 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:43:15,878 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:43:15,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:15,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:43:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-14 21:43:15,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:43:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-10-14 21:43:15,884 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 31 [2019-10-14 21:43:15,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:15,885 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-10-14 21:43:15,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:43:15,885 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-10-14 21:43:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:43:15,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:15,886 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:16,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:16,091 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:16,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1657555758, now seen corresponding path program 6 times [2019-10-14 21:43:16,091 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:16,092 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159916927] [2019-10-14 21:43:16,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:16,092 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:16,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:43:16,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159916927] [2019-10-14 21:43:16,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171279345] [2019-10-14 21:43:16,239 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 21:43:16,348 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:43:16,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:16,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:43:16,352 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:43:16,433 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:16,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-10-14 21:43:16,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263168734] [2019-10-14 21:43:16,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:43:16,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:43:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:16,435 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 15 states. [2019-10-14 21:43:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:16,570 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2019-10-14 21:43:16,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:43:16,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2019-10-14 21:43:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:16,572 INFO L225 Difference]: With dead ends: 67 [2019-10-14 21:43:16,572 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:43:16,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:43:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-10-14 21:43:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:43:16,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-10-14 21:43:16,584 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2019-10-14 21:43:16,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:16,585 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-10-14 21:43:16,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:43:16,585 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-10-14 21:43:16,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:43:16,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:16,589 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:16,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:16,800 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1736985422, now seen corresponding path program 7 times [2019-10-14 21:43:16,800 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:16,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981146915] [2019-10-14 21:43:16,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:16,801 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:16,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:43:16,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981146915] [2019-10-14 21:43:16,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291713325] [2019-10-14 21:43:16,921 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 21:43:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:43:16,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:43:16,990 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:16,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:43:16,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087648325] [2019-10-14 21:43:16,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:43:16,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:16,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:43:16,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:43:16,992 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 12 states. [2019-10-14 21:43:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:17,076 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2019-10-14 21:43:17,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:43:17,077 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-10-14 21:43:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:17,078 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:43:17,078 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 21:43:17,079 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 21:43:17,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 21:43:17,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-14 21:43:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:43:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-10-14 21:43:17,084 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 39 [2019-10-14 21:43:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:17,084 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-10-14 21:43:17,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:43:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-10-14 21:43:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:43:17,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:17,086 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:17,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:17,290 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:17,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:17,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1698867348, now seen corresponding path program 8 times [2019-10-14 21:43:17,291 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:17,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359546284] [2019-10-14 21:43:17,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:17,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:17,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:43:17,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359546284] [2019-10-14 21:43:17,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006193194] [2019-10-14 21:43:17,411 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 21:43:17,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:17,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:17,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:43:17,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:43:17,509 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:17,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:43:17,510 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962084151] [2019-10-14 21:43:17,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:43:17,511 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:17,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:43:17,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:43:17,512 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 13 states. [2019-10-14 21:43:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:17,620 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2019-10-14 21:43:17,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:43:17,620 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2019-10-14 21:43:17,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:17,621 INFO L225 Difference]: With dead ends: 72 [2019-10-14 21:43:17,621 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:43:17,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 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 21:43:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:43:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-14 21:43:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:43:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-10-14 21:43:17,636 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 41 [2019-10-14 21:43:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:17,637 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-10-14 21:43:17,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:43:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-10-14 21:43:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:43:17,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:17,638 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:17,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:17,849 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash -723528694, now seen corresponding path program 9 times [2019-10-14 21:43:17,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:17,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234902282] [2019-10-14 21:43:17,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:17,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:17,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:43:17,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234902282] [2019-10-14 21:43:17,977 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096701654] [2019-10-14 21:43:17,977 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 21:43:18,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:43:18,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:18,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:43:18,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:43:18,133 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:18,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-10-14 21:43:18,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999513530] [2019-10-14 21:43:18,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:43:18,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:43:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:43:18,136 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 19 states. [2019-10-14 21:43:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:18,277 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2019-10-14 21:43:18,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:43:18,278 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2019-10-14 21:43:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:18,279 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:43:18,279 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 21:43:18,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:43:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 21:43:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-10-14 21:43:18,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 21:43:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-10-14 21:43:18,285 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2019-10-14 21:43:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:18,286 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-10-14 21:43:18,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:43:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-10-14 21:43:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:43:18,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:18,287 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:18,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:18,492 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1396375174, now seen corresponding path program 10 times [2019-10-14 21:43:18,494 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:18,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507375128] [2019-10-14 21:43:18,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,495 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:18,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:43:18,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507375128] [2019-10-14 21:43:18,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821732849] [2019-10-14 21:43:18,631 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 21:43:18,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:18,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:18,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:43:18,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:43:18,704 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:18,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:43:18,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303686964] [2019-10-14 21:43:18,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:43:18,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:43:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:43:18,705 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 15 states. [2019-10-14 21:43:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:18,795 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2019-10-14 21:43:18,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:43:18,796 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2019-10-14 21:43:18,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:18,797 INFO L225 Difference]: With dead ends: 80 [2019-10-14 21:43:18,797 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:43:18,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 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 21:43:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:43:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 21:43:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:43:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-10-14 21:43:18,805 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2019-10-14 21:43:18,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:18,805 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-10-14 21:43:18,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:43:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-10-14 21:43:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:43:18,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:18,806 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:19,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:19,011 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash 380177572, now seen corresponding path program 11 times [2019-10-14 21:43:19,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:19,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211622771] [2019-10-14 21:43:19,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:19,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:19,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:43:19,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211622771] [2019-10-14 21:43:19,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314097659] [2019-10-14 21:43:19,148 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:19,494 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:43:19,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:19,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:43:19,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:43:19,616 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:19,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2019-10-14 21:43:19,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896452414] [2019-10-14 21:43:19,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:43:19,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:43:19,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:19,618 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 22 states. [2019-10-14 21:43:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:19,795 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2019-10-14 21:43:19,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:43:19,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2019-10-14 21:43:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:19,797 INFO L225 Difference]: With dead ends: 85 [2019-10-14 21:43:19,797 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:43:19,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=334, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:43:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-10-14 21:43:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-14 21:43:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-10-14 21:43:19,812 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2019-10-14 21:43:19,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:19,812 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-10-14 21:43:19,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:43:19,812 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-10-14 21:43:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:43:19,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:19,815 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:20,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:20,016 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:20,016 INFO L82 PathProgramCache]: Analyzing trace with hash 901728800, now seen corresponding path program 12 times [2019-10-14 21:43:20,017 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:20,017 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825169698] [2019-10-14 21:43:20,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:20,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 21:43:20,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825169698] [2019-10-14 21:43:20,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105671976] [2019-10-14 21:43:20,165 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:21,475 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:43:21,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:21,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:43:21,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:43:21,600 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:21,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 24 [2019-10-14 21:43:21,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082447981] [2019-10-14 21:43:21,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:43:21,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:21,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:43:21,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:43:21,602 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 24 states. [2019-10-14 21:43:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:21,734 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2019-10-14 21:43:21,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:43:21,734 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2019-10-14 21:43:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:21,735 INFO L225 Difference]: With dead ends: 91 [2019-10-14 21:43:21,736 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:43:21,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:43:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:43:21,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-10-14 21:43:21,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 21:43:21,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-10-14 21:43:21,742 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2019-10-14 21:43:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:21,742 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-10-14 21:43:21,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:43:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-10-14 21:43:21,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:43:21,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:21,743 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:21,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:21,955 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:21,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1482906012, now seen corresponding path program 13 times [2019-10-14 21:43:21,956 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:21,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793954053] [2019-10-14 21:43:21,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:21,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:43:22,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793954053] [2019-10-14 21:43:22,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198257525] [2019-10-14 21:43:22,127 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:43:22,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:43:22,246 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:22,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:43:22,247 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221692213] [2019-10-14 21:43:22,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:43:22,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:22,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:43:22,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:43:22,249 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 18 states. [2019-10-14 21:43:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:22,375 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2019-10-14 21:43:22,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:43:22,376 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2019-10-14 21:43:22,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:22,377 INFO L225 Difference]: With dead ends: 94 [2019-10-14 21:43:22,377 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 21:43:22,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 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 21:43:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 21:43:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-14 21:43:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:43:22,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-10-14 21:43:22,385 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 57 [2019-10-14 21:43:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:22,386 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-10-14 21:43:22,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:43:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-10-14 21:43:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:43:22,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:22,387 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:22,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:22,597 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:22,597 INFO L82 PathProgramCache]: Analyzing trace with hash 518314554, now seen corresponding path program 14 times [2019-10-14 21:43:22,598 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:22,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730070174] [2019-10-14 21:43:22,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,599 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:22,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:43:22,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730070174] [2019-10-14 21:43:22,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960585241] [2019-10-14 21:43:22,787 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:22,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:22,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:22,844 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:43:22,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:43:22,869 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:22,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:43:22,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536236142] [2019-10-14 21:43:22,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:43:22,870 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:22,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:43:22,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:43:22,871 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 19 states. [2019-10-14 21:43:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:22,959 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2019-10-14 21:43:22,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:43:22,959 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2019-10-14 21:43:22,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:22,960 INFO L225 Difference]: With dead ends: 96 [2019-10-14 21:43:22,960 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:43:22,961 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 21:43:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:43:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-14 21:43:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:43:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-10-14 21:43:22,966 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2019-10-14 21:43:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:22,966 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-10-14 21:43:22,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:43:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-10-14 21:43:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:43:22,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:22,967 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:23,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:23,174 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:23,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:23,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1258859352, now seen corresponding path program 15 times [2019-10-14 21:43:23,174 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:23,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886127348] [2019-10-14 21:43:23,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,175 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:23,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 21:43:23,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886127348] [2019-10-14 21:43:23,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335086233] [2019-10-14 21:43:23,380 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:23,722 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:43:23,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:23,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:43:23,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-14 21:43:23,874 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:23,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11] total 28 [2019-10-14 21:43:23,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428795677] [2019-10-14 21:43:23,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:43:23,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:23,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:43:23,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:43:23,880 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 28 states. [2019-10-14 21:43:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,111 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2019-10-14 21:43:24,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:43:24,112 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2019-10-14 21:43:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,113 INFO L225 Difference]: With dead ends: 101 [2019-10-14 21:43:24,113 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:43:24,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:43:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:43:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-10-14 21:43:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:43:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-10-14 21:43:24,118 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 61 [2019-10-14 21:43:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,118 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-10-14 21:43:24,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:43:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-10-14 21:43:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:43:24,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,120 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:24,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:24,324 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:24,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1831973164, now seen corresponding path program 16 times [2019-10-14 21:43:24,325 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:24,325 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032975783] [2019-10-14 21:43:24,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:24,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:43:24,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032975783] [2019-10-14 21:43:24,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456814304] [2019-10-14 21:43:24,596 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:24,694 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:24,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:24,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:43:24,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:43:24,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:24,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:43:24,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780345988] [2019-10-14 21:43:24,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:43:24,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:43:24,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:43:24,723 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 21 states. [2019-10-14 21:43:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:24,839 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2019-10-14 21:43:24,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:43:24,839 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2019-10-14 21:43:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:24,840 INFO L225 Difference]: With dead ends: 104 [2019-10-14 21:43:24,841 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:43:24,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:43:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:43:24,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-14 21:43:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:43:24,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-10-14 21:43:24,847 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 65 [2019-10-14 21:43:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:24,847 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-10-14 21:43:24,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:43:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-10-14 21:43:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:43:24,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:24,848 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:25,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:25,054 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:25,054 INFO L82 PathProgramCache]: Analyzing trace with hash 34361714, now seen corresponding path program 17 times [2019-10-14 21:43:25,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:25,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182188427] [2019-10-14 21:43:25,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:25,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:43:25,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182188427] [2019-10-14 21:43:25,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000370867] [2019-10-14 21:43:25,297 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:33,129 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 21:43:33,129 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:33,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:43:33,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:43:33,162 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:33,162 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:43:33,162 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200521825] [2019-10-14 21:43:33,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:43:33,163 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:33,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:43:33,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:33,164 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 22 states. [2019-10-14 21:43:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:33,334 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2019-10-14 21:43:33,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:43:33,335 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2019-10-14 21:43:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:33,336 INFO L225 Difference]: With dead ends: 106 [2019-10-14 21:43:33,336 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:43:33,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:43:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:43:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-14 21:43:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:43:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2019-10-14 21:43:33,342 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 67 [2019-10-14 21:43:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:33,342 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2019-10-14 21:43:33,342 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:43:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2019-10-14 21:43:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:43:33,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:33,343 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:33,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:33,551 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:33,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1714150256, now seen corresponding path program 18 times [2019-10-14 21:43:33,552 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:33,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781874811] [2019-10-14 21:43:33,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:33,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:33,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 21:43:33,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781874811] [2019-10-14 21:43:33,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434689464] [2019-10-14 21:43:33,794 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true