java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:47:32,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:47:32,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:47:32,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:47:32,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:47:32,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:47:32,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:47:32,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:47:32,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:47:32,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:47:32,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:47:32,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:47:32,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:47:32,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:47:32,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:47:32,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:47:32,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:47:32,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:47:32,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:47:32,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:47:32,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:47:32,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:47:32,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:47:32,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:47:32,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:47:32,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:47:32,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:47:32,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:47:32,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:47:32,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:47:32,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:47:32,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:47:32,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:47:32,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:47:32,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:47:32,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:47:32,423 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 21:47:32,445 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:47:32,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:47:32,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:47:32,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:47:32,448 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:47:32,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:47:32,449 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:47:32,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:47:32,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:47:32,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:47:32,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:47:32,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:47:32,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:47:32,452 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:47:32,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:47:32,452 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:47:32,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:47:32,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:47:32,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:47:32,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:47:32,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:47:32,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:47:32,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:47:32,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:47:32,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:47:32,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:47:32,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:47:32,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:47:32,455 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:47:32,740 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:47:32,753 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:47:32,757 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:47:32,758 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:47:32,759 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:47:32,760 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-10-14 21:47:32,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108d3c1eb/bdb156e417324c5db4e4c31485da67fe/FLAG692fe4ba8 [2019-10-14 21:47:33,296 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:47:33,297 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-10-14 21:47:33,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108d3c1eb/bdb156e417324c5db4e4c31485da67fe/FLAG692fe4ba8 [2019-10-14 21:47:33,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/108d3c1eb/bdb156e417324c5db4e4c31485da67fe [2019-10-14 21:47:33,684 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:47:33,686 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:47:33,687 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:33,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:47:33,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:47:33,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:33" (1/1) ... [2019-10-14 21:47:33,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a92faeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33, skipping insertion in model container [2019-10-14 21:47:33,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:47:33" (1/1) ... [2019-10-14 21:47:33,704 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:47:33,721 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:47:33,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:33,937 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:47:33,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:47:33,980 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:47:33,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33 WrapperNode [2019-10-14 21:47:33,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:47:33,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:47:33,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:47:33,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:47:34,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33" (1/1) ... [2019-10-14 21:47:34,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33" (1/1) ... [2019-10-14 21:47:34,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33" (1/1) ... [2019-10-14 21:47:34,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33" (1/1) ... [2019-10-14 21:47:34,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33" (1/1) ... [2019-10-14 21:47:34,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33" (1/1) ... [2019-10-14 21:47:34,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33" (1/1) ... [2019-10-14 21:47:34,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:47:34,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:47:34,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:47:34,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:47:34,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33" (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 21:47:34,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:47:34,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:47:34,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:47:34,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:47:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:47:34,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:47:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:47:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:47:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:47:34,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:47:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:47:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:47:34,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:47:34,397 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:47:34,398 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:47:34,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:34 BoogieIcfgContainer [2019-10-14 21:47:34,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:47:34,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:47:34,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:47:34,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:47:34,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:47:33" (1/3) ... [2019-10-14 21:47:34,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f51266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:34, skipping insertion in model container [2019-10-14 21:47:34,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:47:33" (2/3) ... [2019-10-14 21:47:34,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19f51266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:47:34, skipping insertion in model container [2019-10-14 21:47:34,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:47:34" (3/3) ... [2019-10-14 21:47:34,414 INFO L109 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2019-10-14 21:47:34,430 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:47:34,440 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:47:34,454 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:47:34,483 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:47:34,484 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:47:34,484 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:47:34,484 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:47:34,487 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:47:34,487 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:47:34,488 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:47:34,488 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:47:34,508 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-14 21:47:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 21:47:34,516 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:34,518 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:34,520 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash -423135907, now seen corresponding path program 1 times [2019-10-14 21:47:34,536 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:34,536 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066450756] [2019-10-14 21:47:34,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:34,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:34,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:34,701 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 21:47:34,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066450756] [2019-10-14 21:47:34,702 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:34,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:47:34,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890119961] [2019-10-14 21:47:34,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:47:34,712 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:34,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:47:34,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:47:34,732 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-10-14 21:47:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:34,835 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-10-14 21:47:34,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:47:34,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-14 21:47:34,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:34,846 INFO L225 Difference]: With dead ends: 42 [2019-10-14 21:47:34,846 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 21:47:34,850 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 21:47:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 21:47:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 21:47:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 21:47:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-14 21:47:34,895 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2019-10-14 21:47:34,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:34,896 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-14 21:47:34,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:47:34,896 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-14 21:47:34,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 21:47:34,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:34,898 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:34,898 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1453190697, now seen corresponding path program 1 times [2019-10-14 21:47:34,899 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:34,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485339677] [2019-10-14 21:47:34,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:34,900 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:34,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:34,966 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 21:47:34,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485339677] [2019-10-14 21:47:34,967 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:47:34,967 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:47:34,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704052813] [2019-10-14 21:47:34,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:47:34,969 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:47:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:47:34,970 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-10-14 21:47:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:35,048 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-10-14 21:47:35,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:47:35,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-14 21:47:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:35,052 INFO L225 Difference]: With dead ends: 39 [2019-10-14 21:47:35,052 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:47:35,053 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 21:47:35,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:47:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-10-14 21:47:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:47:35,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 21:47:35,065 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2019-10-14 21:47:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:35,065 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 21:47:35,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:47:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 21:47:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:47:35,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:35,068 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:35,068 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash -769700427, now seen corresponding path program 1 times [2019-10-14 21:47:35,069 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:35,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990299111] [2019-10-14 21:47:35,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:35,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:35,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:35,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990299111] [2019-10-14 21:47:35,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791531960] [2019-10-14 21:47:35,164 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 21:47:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:35,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:47:35,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:35,262 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:35,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:47:35,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402508695] [2019-10-14 21:47:35,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:47:35,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:35,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:47:35,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:35,264 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-14 21:47:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:35,413 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-10-14 21:47:35,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:47:35,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-10-14 21:47:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:35,415 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:47:35,415 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 21:47:35,416 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:47:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 21:47:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-14 21:47:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:47:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-10-14 21:47:35,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2019-10-14 21:47:35,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:35,426 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-10-14 21:47:35,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:47:35,427 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-10-14 21:47:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:47:35,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:35,428 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:35,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:35,632 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1065547245, now seen corresponding path program 2 times [2019-10-14 21:47:35,633 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:35,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111078851] [2019-10-14 21:47:35,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:35,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:35,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:35,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111078851] [2019-10-14 21:47:35,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963698444] [2019-10-14 21:47:35,725 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 21:47:35,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:35,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:35,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:47:35,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:35,807 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:35,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:47:35,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23246445] [2019-10-14 21:47:35,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:47:35,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:35,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:47:35,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:47:35,809 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2019-10-14 21:47:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:35,926 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-10-14 21:47:35,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:47:35,926 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-10-14 21:47:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:35,927 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:47:35,928 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:47:35,928 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 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 21:47:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:47:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-14 21:47:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:47:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-10-14 21:47:35,938 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 17 [2019-10-14 21:47:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:35,938 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-10-14 21:47:35,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:47:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-10-14 21:47:35,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:47:35,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:35,939 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:36,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:36,144 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1906497807, now seen corresponding path program 3 times [2019-10-14 21:47:36,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:36,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511289177] [2019-10-14 21:47:36,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:36,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:36,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:36,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511289177] [2019-10-14 21:47:36,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924227449] [2019-10-14 21:47:36,240 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 21:47:36,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:47:36,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:36,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:36,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:36,321 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:36,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:47:36,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480457636] [2019-10-14 21:47:36,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:47:36,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:47:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:36,324 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2019-10-14 21:47:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:36,462 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-10-14 21:47:36,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:47:36,462 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-10-14 21:47:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:36,464 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:47:36,464 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:47:36,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:36,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:47:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-10-14 21:47:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:47:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-10-14 21:47:36,474 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 19 [2019-10-14 21:47:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:36,475 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-10-14 21:47:36,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:47:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-10-14 21:47:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:47:36,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:36,476 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:36,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:36,681 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:36,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:36,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1688831055, now seen corresponding path program 4 times [2019-10-14 21:47:36,682 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:36,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555177253] [2019-10-14 21:47:36,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:36,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:36,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:36,814 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555177253] [2019-10-14 21:47:36,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688984628] [2019-10-14 21:47:36,815 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 21:47:36,857 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:36,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:36,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:47:36,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:36,873 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:36,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:47:36,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685490079] [2019-10-14 21:47:36,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:47:36,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:36,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:47:36,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:47:36,875 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2019-10-14 21:47:37,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:37,035 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-10-14 21:47:37,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:47:37,036 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-10-14 21:47:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:37,037 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:47:37,037 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:47:37,038 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 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 21:47:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:47:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-10-14 21:47:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:47:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-10-14 21:47:37,047 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 21 [2019-10-14 21:47:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:37,048 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-10-14 21:47:37,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:47:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-10-14 21:47:37,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:47:37,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:37,049 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:37,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:37,254 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:37,255 INFO L82 PathProgramCache]: Analyzing trace with hash -648805843, now seen corresponding path program 5 times [2019-10-14 21:47:37,255 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:37,256 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668133178] [2019-10-14 21:47:37,256 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:37,256 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:37,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:37,373 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668133178] [2019-10-14 21:47:37,374 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60768898] [2019-10-14 21:47:37,374 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 21:47:37,413 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-14 21:47:37,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:37,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:47:37,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:37,439 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:37,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:47:37,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382903281] [2019-10-14 21:47:37,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:47:37,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:37,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:47:37,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:37,444 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 10 states. [2019-10-14 21:47:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:37,610 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2019-10-14 21:47:37,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:47:37,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-10-14 21:47:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:37,611 INFO L225 Difference]: With dead ends: 98 [2019-10-14 21:47:37,612 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 21:47:37,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 21:47:37,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-14 21:47:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:47:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-10-14 21:47:37,631 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 23 [2019-10-14 21:47:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:37,631 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-10-14 21:47:37,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:47:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-10-14 21:47:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:47:37,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:37,632 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:37,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:37,844 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:37,844 INFO L82 PathProgramCache]: Analyzing trace with hash -849969013, now seen corresponding path program 6 times [2019-10-14 21:47:37,844 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:37,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710671866] [2019-10-14 21:47:37,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:37,845 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:37,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:37,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710671866] [2019-10-14 21:47:37,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299529841] [2019-10-14 21:47:37,953 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 21:47:37,997 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:47:37,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:37,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:38,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:38,018 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:38,018 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:47:38,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944290417] [2019-10-14 21:47:38,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:47:38,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:38,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:47:38,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:38,019 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 11 states. [2019-10-14 21:47:38,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:38,181 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-10-14 21:47:38,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:47:38,181 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-10-14 21:47:38,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:38,183 INFO L225 Difference]: With dead ends: 110 [2019-10-14 21:47:38,183 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 21:47:38,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:38,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 21:47:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-10-14 21:47:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-14 21:47:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2019-10-14 21:47:38,201 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 25 [2019-10-14 21:47:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:38,201 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2019-10-14 21:47:38,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:47:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2019-10-14 21:47:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:47:38,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:38,207 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:38,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:38,408 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:38,409 INFO L82 PathProgramCache]: Analyzing trace with hash -894247063, now seen corresponding path program 7 times [2019-10-14 21:47:38,409 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:38,409 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347167827] [2019-10-14 21:47:38,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:38,410 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:38,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:38,539 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:38,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347167827] [2019-10-14 21:47:38,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156191429] [2019-10-14 21:47:38,540 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 21:47:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:38,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:47:38,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:38,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:38,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:47:38,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573613606] [2019-10-14 21:47:38,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:47:38,608 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:38,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:47:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:47:38,609 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 12 states. [2019-10-14 21:47:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:38,784 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2019-10-14 21:47:38,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:47:38,784 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-10-14 21:47:38,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:38,785 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:47:38,786 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:47:38,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 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 21:47:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:47:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2019-10-14 21:47:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:47:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2019-10-14 21:47:38,796 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 27 [2019-10-14 21:47:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:38,796 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2019-10-14 21:47:38,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:47:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2019-10-14 21:47:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:47:38,797 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:38,797 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:39,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:39,005 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash -495780153, now seen corresponding path program 8 times [2019-10-14 21:47:39,006 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:39,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312510456] [2019-10-14 21:47:39,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:39,006 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:39,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:39,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312510456] [2019-10-14 21:47:39,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87658626] [2019-10-14 21:47:39,136 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 21:47:39,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:39,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:39,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:47:39,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:39,221 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:39,222 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:47:39,222 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378064408] [2019-10-14 21:47:39,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:47:39,223 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:47:39,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:47:39,223 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 13 states. [2019-10-14 21:47:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:39,413 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2019-10-14 21:47:39,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:47:39,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-10-14 21:47:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:39,415 INFO L225 Difference]: With dead ends: 134 [2019-10-14 21:47:39,416 INFO L226 Difference]: Without dead ends: 83 [2019-10-14 21:47:39,417 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:47:39,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-14 21:47:39,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2019-10-14 21:47:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 21:47:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2019-10-14 21:47:39,427 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 29 [2019-10-14 21:47:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:39,427 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2019-10-14 21:47:39,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:47:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2019-10-14 21:47:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:47:39,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:39,429 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:39,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:39,638 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash 178831013, now seen corresponding path program 9 times [2019-10-14 21:47:39,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:39,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969971156] [2019-10-14 21:47:39,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:39,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:39,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:39,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969971156] [2019-10-14 21:47:39,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145468191] [2019-10-14 21:47:39,765 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 21:47:39,828 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:47:39,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:39,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:47:39,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:39,853 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:39,853 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:47:39,853 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950876544] [2019-10-14 21:47:39,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:39,854 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:39,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:39,855 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 14 states. [2019-10-14 21:47:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:40,154 INFO L93 Difference]: Finished difference Result 146 states and 170 transitions. [2019-10-14 21:47:40,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:47:40,155 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-10-14 21:47:40,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:40,157 INFO L225 Difference]: With dead ends: 146 [2019-10-14 21:47:40,157 INFO L226 Difference]: Without dead ends: 90 [2019-10-14 21:47:40,158 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-14 21:47:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2019-10-14 21:47:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 21:47:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2019-10-14 21:47:40,166 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 31 [2019-10-14 21:47:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:40,167 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2019-10-14 21:47:40,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2019-10-14 21:47:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:47:40,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:40,168 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:40,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:40,372 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:40,372 INFO L82 PathProgramCache]: Analyzing trace with hash -59900157, now seen corresponding path program 10 times [2019-10-14 21:47:40,373 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:40,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905541643] [2019-10-14 21:47:40,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:40,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:40,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:40,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905541643] [2019-10-14 21:47:40,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392423813] [2019-10-14 21:47:40,542 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 21:47:40,612 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:40,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:40,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:47:40,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:40,652 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:40,653 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:47:40,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933878642] [2019-10-14 21:47:40,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:47:40,654 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:40,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:47:40,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:40,655 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 15 states. [2019-10-14 21:47:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:40,900 INFO L93 Difference]: Finished difference Result 158 states and 184 transitions. [2019-10-14 21:47:40,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:40,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-10-14 21:47:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:40,902 INFO L225 Difference]: With dead ends: 158 [2019-10-14 21:47:40,902 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 21:47:40,903 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 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 21:47:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 21:47:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 21:47:40,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:47:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2019-10-14 21:47:40,911 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 33 [2019-10-14 21:47:40,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:40,912 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2019-10-14 21:47:40,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:47:40,912 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2019-10-14 21:47:40,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:47:40,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:40,913 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:41,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:41,118 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:41,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:41,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1847287839, now seen corresponding path program 11 times [2019-10-14 21:47:41,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:41,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955448621] [2019-10-14 21:47:41,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:41,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:41,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:41,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955448621] [2019-10-14 21:47:41,257 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925085447] [2019-10-14 21:47:41,257 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 21:47:41,340 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-14 21:47:41,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:41,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:47:41,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:41,365 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:41,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:47:41,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867121115] [2019-10-14 21:47:41,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:47:41,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:47:41,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:41,367 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 16 states. [2019-10-14 21:47:41,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:41,626 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2019-10-14 21:47:41,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:47:41,626 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-10-14 21:47:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:41,627 INFO L225 Difference]: With dead ends: 170 [2019-10-14 21:47:41,628 INFO L226 Difference]: Without dead ends: 104 [2019-10-14 21:47:41,628 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:47:41,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-14 21:47:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-10-14 21:47:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-10-14 21:47:41,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2019-10-14 21:47:41,636 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 35 [2019-10-14 21:47:41,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:41,637 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2019-10-14 21:47:41,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:47:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2019-10-14 21:47:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:47:41,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:41,638 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:41,850 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:41,850 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1539931841, now seen corresponding path program 12 times [2019-10-14 21:47:41,851 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:41,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35216043] [2019-10-14 21:47:41,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:41,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:41,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:42,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35216043] [2019-10-14 21:47:42,023 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400548278] [2019-10-14 21:47:42,023 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 21:47:42,130 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:47:42,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:42,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 21:47:42,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:42,168 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:42,168 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-10-14 21:47:42,168 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891418033] [2019-10-14 21:47:42,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:47:42,170 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:42,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:47:42,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:47:42,171 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 17 states. [2019-10-14 21:47:42,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:42,462 INFO L93 Difference]: Finished difference Result 182 states and 212 transitions. [2019-10-14 21:47:42,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:47:42,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-10-14 21:47:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:42,465 INFO L225 Difference]: With dead ends: 182 [2019-10-14 21:47:42,465 INFO L226 Difference]: Without dead ends: 111 [2019-10-14 21:47:42,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:47:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-14 21:47:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2019-10-14 21:47:42,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 21:47:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2019-10-14 21:47:42,474 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 37 [2019-10-14 21:47:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:42,475 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2019-10-14 21:47:42,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:47:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2019-10-14 21:47:42,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 21:47:42,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:42,476 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:42,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:42,682 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:42,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1771406109, now seen corresponding path program 13 times [2019-10-14 21:47:42,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:42,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846037989] [2019-10-14 21:47:42,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:42,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:42,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:42,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846037989] [2019-10-14 21:47:42,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872710972] [2019-10-14 21:47:42,876 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 21:47:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:42,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:47:42,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:42,957 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:42,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:47:42,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25400299] [2019-10-14 21:47:42,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:47:42,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:42,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:47:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:42,960 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 18 states. [2019-10-14 21:47:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:43,260 INFO L93 Difference]: Finished difference Result 194 states and 226 transitions. [2019-10-14 21:47:43,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:47:43,261 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-10-14 21:47:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:43,262 INFO L225 Difference]: With dead ends: 194 [2019-10-14 21:47:43,262 INFO L226 Difference]: Without dead ends: 118 [2019-10-14 21:47:43,263 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:47:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-14 21:47:43,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2019-10-14 21:47:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-10-14 21:47:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2019-10-14 21:47:43,271 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 39 [2019-10-14 21:47:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:43,271 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2019-10-14 21:47:43,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:47:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2019-10-14 21:47:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:47:43,273 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:43,273 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:43,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:43,476 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:43,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:43,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1396409723, now seen corresponding path program 14 times [2019-10-14 21:47:43,477 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:43,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615067200] [2019-10-14 21:47:43,478 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:43,478 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:43,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:43,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615067200] [2019-10-14 21:47:43,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111865167] [2019-10-14 21:47:43,682 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 21:47:43,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:43,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:43,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:47:43,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:43,756 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:43,756 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:47:43,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971210962] [2019-10-14 21:47:43,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:47:43,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:43,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:47:43,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:47:43,758 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand 19 states. [2019-10-14 21:47:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:44,084 INFO L93 Difference]: Finished difference Result 206 states and 240 transitions. [2019-10-14 21:47:44,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:47:44,084 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-10-14 21:47:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:44,086 INFO L225 Difference]: With dead ends: 206 [2019-10-14 21:47:44,086 INFO L226 Difference]: Without dead ends: 125 [2019-10-14 21:47:44,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:47:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-14 21:47:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2019-10-14 21:47:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-10-14 21:47:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2019-10-14 21:47:44,096 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 41 [2019-10-14 21:47:44,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:44,098 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2019-10-14 21:47:44,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:47:44,098 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2019-10-14 21:47:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 21:47:44,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:44,100 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:44,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:44,305 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1802135641, now seen corresponding path program 15 times [2019-10-14 21:47:44,305 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:44,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498390067] [2019-10-14 21:47:44,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:44,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:44,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:44,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498390067] [2019-10-14 21:47:44,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570008391] [2019-10-14 21:47:44,515 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 21:47:44,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-10-14 21:47:44,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:44,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:47:44,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:44,635 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:44,636 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-14 21:47:44,636 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796832964] [2019-10-14 21:47:44,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:47:44,637 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:47:44,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:44,643 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand 20 states. [2019-10-14 21:47:45,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:45,040 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2019-10-14 21:47:45,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:47:45,040 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-10-14 21:47:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:45,042 INFO L225 Difference]: With dead ends: 218 [2019-10-14 21:47:45,042 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 21:47:45,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:45,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 21:47:45,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2019-10-14 21:47:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-14 21:47:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2019-10-14 21:47:45,051 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 43 [2019-10-14 21:47:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:45,052 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2019-10-14 21:47:45,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:47:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2019-10-14 21:47:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:47:45,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:45,053 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:45,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:45,254 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:45,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:45,255 INFO L82 PathProgramCache]: Analyzing trace with hash 862718903, now seen corresponding path program 16 times [2019-10-14 21:47:45,255 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:45,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798453377] [2019-10-14 21:47:45,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:45,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:45,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:45,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798453377] [2019-10-14 21:47:45,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695672331] [2019-10-14 21:47:45,488 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 21:47:45,552 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:45,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:45,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:47:45,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:45,586 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:45,587 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:47:45,587 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791579182] [2019-10-14 21:47:45,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:47:45,588 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:47:45,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:47:45,589 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand 21 states. [2019-10-14 21:47:46,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:46,089 INFO L93 Difference]: Finished difference Result 230 states and 268 transitions. [2019-10-14 21:47:46,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:47:46,090 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-10-14 21:47:46,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:46,093 INFO L225 Difference]: With dead ends: 230 [2019-10-14 21:47:46,093 INFO L226 Difference]: Without dead ends: 139 [2019-10-14 21:47:46,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:47:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-14 21:47:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2019-10-14 21:47:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-10-14 21:47:46,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2019-10-14 21:47:46,105 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 45 [2019-10-14 21:47:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:46,106 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2019-10-14 21:47:46,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:47:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2019-10-14 21:47:46,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:47:46,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:46,107 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:46,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:46,312 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash 26365845, now seen corresponding path program 17 times [2019-10-14 21:47:46,313 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:46,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660474429] [2019-10-14 21:47:46,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:46,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:46,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:46,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660474429] [2019-10-14 21:47:46,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336907556] [2019-10-14 21:47:46,544 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 21:47:46,688 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-10-14 21:47:46,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:46,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:47:46,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:46,709 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:46,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:47:46,710 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828903372] [2019-10-14 21:47:46,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:47:46,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:46,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:47:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:47:46,711 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand 22 states. [2019-10-14 21:47:47,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:47,131 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2019-10-14 21:47:47,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:47:47,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-10-14 21:47:47,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:47,134 INFO L225 Difference]: With dead ends: 242 [2019-10-14 21:47:47,134 INFO L226 Difference]: Without dead ends: 146 [2019-10-14 21:47:47,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 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 21:47:47,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-14 21:47:47,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2019-10-14 21:47:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-10-14 21:47:47,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 164 transitions. [2019-10-14 21:47:47,143 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 164 transitions. Word has length 47 [2019-10-14 21:47:47,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:47,143 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 164 transitions. [2019-10-14 21:47:47,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:47:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 164 transitions. [2019-10-14 21:47:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:47:47,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:47,144 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:47,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:47,347 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:47,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash -550038541, now seen corresponding path program 18 times [2019-10-14 21:47:47,348 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:47,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653530157] [2019-10-14 21:47:47,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:47,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:47,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:47,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653530157] [2019-10-14 21:47:47,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049660700] [2019-10-14 21:47:47,569 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 [2019-10-14 21:47:47,905 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 21:47:47,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:47,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:47:47,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:47,939 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:47,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-10-14 21:47:47,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397393409] [2019-10-14 21:47:47,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:47:47,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:47:47,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:47:47,940 INFO L87 Difference]: Start difference. First operand 144 states and 164 transitions. Second operand 23 states. [2019-10-14 21:47:48,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:48,314 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2019-10-14 21:47:48,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 21:47:48,314 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-10-14 21:47:48,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:48,315 INFO L225 Difference]: With dead ends: 254 [2019-10-14 21:47:48,315 INFO L226 Difference]: Without dead ends: 153 [2019-10-14 21:47:48,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:47:48,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-10-14 21:47:48,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2019-10-14 21:47:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-10-14 21:47:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2019-10-14 21:47:48,322 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 49 [2019-10-14 21:47:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:48,322 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2019-10-14 21:47:48,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:47:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2019-10-14 21:47:48,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:47:48,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:48,323 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:48,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:48,529 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:48,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:48,529 INFO L82 PathProgramCache]: Analyzing trace with hash -423872303, now seen corresponding path program 19 times [2019-10-14 21:47:48,529 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:48,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481694342] [2019-10-14 21:47:48,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:48,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:48,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:48,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481694342] [2019-10-14 21:47:48,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627048175] [2019-10-14 21:47:48,778 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:48,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:47:48,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:48,862 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:48,862 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:47:48,862 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975188565] [2019-10-14 21:47:48,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:47:48,863 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:47:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:48,865 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand 24 states. [2019-10-14 21:47:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:49,247 INFO L93 Difference]: Finished difference Result 266 states and 310 transitions. [2019-10-14 21:47:49,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:47:49,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2019-10-14 21:47:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:49,249 INFO L225 Difference]: With dead ends: 266 [2019-10-14 21:47:49,249 INFO L226 Difference]: Without dead ends: 160 [2019-10-14 21:47:49,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:47:49,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-14 21:47:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2019-10-14 21:47:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-10-14 21:47:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2019-10-14 21:47:49,257 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 51 [2019-10-14 21:47:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:49,258 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2019-10-14 21:47:49,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:47:49,258 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2019-10-14 21:47:49,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:47:49,258 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:49,259 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:49,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:49,463 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:49,463 INFO L82 PathProgramCache]: Analyzing trace with hash 562798127, now seen corresponding path program 20 times [2019-10-14 21:47:49,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:49,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147279060] [2019-10-14 21:47:49,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:49,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:49,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147279060] [2019-10-14 21:47:49,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709982442] [2019-10-14 21:47:49,751 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:49,799 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:49,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:49,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:47:49,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:49,817 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:49,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:47:49,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939503374] [2019-10-14 21:47:49,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:47:49,818 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:49,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:47:49,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:47:49,819 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand 25 states. [2019-10-14 21:47:50,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:50,409 INFO L93 Difference]: Finished difference Result 278 states and 324 transitions. [2019-10-14 21:47:50,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:47:50,412 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2019-10-14 21:47:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:50,413 INFO L225 Difference]: With dead ends: 278 [2019-10-14 21:47:50,413 INFO L226 Difference]: Without dead ends: 167 [2019-10-14 21:47:50,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:47:50,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-10-14 21:47:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-10-14 21:47:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-10-14 21:47:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2019-10-14 21:47:50,427 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 53 [2019-10-14 21:47:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:50,427 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2019-10-14 21:47:50,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:47:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2019-10-14 21:47:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 21:47:50,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:50,429 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:50,633 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:50,633 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:50,634 INFO L82 PathProgramCache]: Analyzing trace with hash -434691059, now seen corresponding path program 21 times [2019-10-14 21:47:50,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:50,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29895620] [2019-10-14 21:47:50,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:50,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:50,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29895620] [2019-10-14 21:47:50,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658620777] [2019-10-14 21:47:50,921 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:51,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-14 21:47:51,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:51,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:47:51,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:51,179 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:51,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-10-14 21:47:51,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392462198] [2019-10-14 21:47:51,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:47:51,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:47:51,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:47:51,182 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand 26 states. [2019-10-14 21:47:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:51,636 INFO L93 Difference]: Finished difference Result 290 states and 338 transitions. [2019-10-14 21:47:51,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:47:51,637 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2019-10-14 21:47:51,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:51,639 INFO L225 Difference]: With dead ends: 290 [2019-10-14 21:47:51,639 INFO L226 Difference]: Without dead ends: 174 [2019-10-14 21:47:51,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:47:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-10-14 21:47:51,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2019-10-14 21:47:51,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-10-14 21:47:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2019-10-14 21:47:51,650 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 55 [2019-10-14 21:47:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:51,651 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2019-10-14 21:47:51,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:47:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2019-10-14 21:47:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:47:51,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:51,652 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:51,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:51,858 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1244091797, now seen corresponding path program 22 times [2019-10-14 21:47:51,859 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:51,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796379694] [2019-10-14 21:47:51,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:51,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:51,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:52,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796379694] [2019-10-14 21:47:52,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989248123] [2019-10-14 21:47:52,255 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:52,315 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:52,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:52,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:47:52,318 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:52,344 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:52,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:47:52,344 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102581373] [2019-10-14 21:47:52,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:47:52,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:52,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:47:52,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:47:52,346 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 27 states. [2019-10-14 21:47:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:52,867 INFO L93 Difference]: Finished difference Result 302 states and 352 transitions. [2019-10-14 21:47:52,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:47:52,868 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2019-10-14 21:47:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:52,869 INFO L225 Difference]: With dead ends: 302 [2019-10-14 21:47:52,869 INFO L226 Difference]: Without dead ends: 181 [2019-10-14 21:47:52,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:47:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-14 21:47:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2019-10-14 21:47:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-10-14 21:47:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 204 transitions. [2019-10-14 21:47:52,877 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 204 transitions. Word has length 57 [2019-10-14 21:47:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:52,878 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 204 transitions. [2019-10-14 21:47:52,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:47:52,878 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 204 transitions. [2019-10-14 21:47:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-14 21:47:52,879 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:52,879 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:53,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:53,083 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:53,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:53,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1689120439, now seen corresponding path program 23 times [2019-10-14 21:47:53,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:53,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509477949] [2019-10-14 21:47:53,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:53,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:53,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509477949] [2019-10-14 21:47:53,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545752050] [2019-10-14 21:47:53,427 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:53,738 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-14 21:47:53,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:53,740 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:47:53,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:53,767 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:53,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:47:53,768 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795940725] [2019-10-14 21:47:53,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:47:53,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:53,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:47:53,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:47:53,770 INFO L87 Difference]: Start difference. First operand 179 states and 204 transitions. Second operand 28 states. [2019-10-14 21:47:54,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:54,397 INFO L93 Difference]: Finished difference Result 314 states and 366 transitions. [2019-10-14 21:47:54,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:47:54,398 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2019-10-14 21:47:54,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:54,400 INFO L225 Difference]: With dead ends: 314 [2019-10-14 21:47:54,400 INFO L226 Difference]: Without dead ends: 188 [2019-10-14 21:47:54,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:47:54,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-10-14 21:47:54,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2019-10-14 21:47:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-10-14 21:47:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2019-10-14 21:47:54,410 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 59 [2019-10-14 21:47:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:54,410 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2019-10-14 21:47:54,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:47:54,410 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2019-10-14 21:47:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:47:54,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:54,411 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:54,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:54,616 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:54,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:54,617 INFO L82 PathProgramCache]: Analyzing trace with hash 135084199, now seen corresponding path program 24 times [2019-10-14 21:47:54,617 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:54,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471767405] [2019-10-14 21:47:54,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:54,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:55,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471767405] [2019-10-14 21:47:55,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105625377] [2019-10-14 21:47:55,042 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:56,184 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-10-14 21:47:56,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:56,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 21:47:56,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:56,205 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:56,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:56,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-10-14 21:47:56,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629749675] [2019-10-14 21:47:56,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:47:56,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:56,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:47:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:47:56,207 INFO L87 Difference]: Start difference. First operand 186 states and 212 transitions. Second operand 29 states. [2019-10-14 21:47:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:56,848 INFO L93 Difference]: Finished difference Result 326 states and 380 transitions. [2019-10-14 21:47:56,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 21:47:56,848 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2019-10-14 21:47:56,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:56,850 INFO L225 Difference]: With dead ends: 326 [2019-10-14 21:47:56,850 INFO L226 Difference]: Without dead ends: 195 [2019-10-14 21:47:56,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:47:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-10-14 21:47:56,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2019-10-14 21:47:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-10-14 21:47:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 220 transitions. [2019-10-14 21:47:56,861 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 220 transitions. Word has length 61 [2019-10-14 21:47:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:56,862 INFO L462 AbstractCegarLoop]: Abstraction has 193 states and 220 transitions. [2019-10-14 21:47:56,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:47:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 220 transitions. [2019-10-14 21:47:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:47:56,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:56,863 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:57,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:57,070 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:57,070 INFO L82 PathProgramCache]: Analyzing trace with hash 849084549, now seen corresponding path program 25 times [2019-10-14 21:47:57,071 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:57,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356541981] [2019-10-14 21:47:57,071 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,071 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:57,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:57,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356541981] [2019-10-14 21:47:57,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945323297] [2019-10-14 21:47:57,413 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:57,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:47:57,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:57,490 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:57,490 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:47:57,490 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289722809] [2019-10-14 21:47:57,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:47:57,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:57,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:47:57,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:47:57,491 INFO L87 Difference]: Start difference. First operand 193 states and 220 transitions. Second operand 30 states. [2019-10-14 21:47:58,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:58,094 INFO L93 Difference]: Finished difference Result 338 states and 394 transitions. [2019-10-14 21:47:58,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:47:58,095 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 63 [2019-10-14 21:47:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:58,096 INFO L225 Difference]: With dead ends: 338 [2019-10-14 21:47:58,096 INFO L226 Difference]: Without dead ends: 202 [2019-10-14 21:47:58,097 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:47:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-14 21:47:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-10-14 21:47:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-10-14 21:47:58,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2019-10-14 21:47:58,105 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 63 [2019-10-14 21:47:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:58,106 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2019-10-14 21:47:58,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:47:58,106 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2019-10-14 21:47:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:47:58,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:58,107 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:58,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,312 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash -191346461, now seen corresponding path program 26 times [2019-10-14 21:47:58,313 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:58,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109606910] [2019-10-14 21:47:58,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:58,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:58,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109606910] [2019-10-14 21:47:58,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925515391] [2019-10-14 21:47:58,789 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:58,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:58,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:58,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:47:58,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:47:58,875 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:58,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:47:58,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929954257] [2019-10-14 21:47:58,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:47:58,876 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:47:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:47:58,877 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand 31 states. [2019-10-14 21:47:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:59,490 INFO L93 Difference]: Finished difference Result 350 states and 408 transitions. [2019-10-14 21:47:59,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:47:59,490 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2019-10-14 21:47:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:59,492 INFO L225 Difference]: With dead ends: 350 [2019-10-14 21:47:59,493 INFO L226 Difference]: Without dead ends: 209 [2019-10-14 21:47:59,494 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:47:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-10-14 21:47:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2019-10-14 21:47:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-10-14 21:47:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 236 transitions. [2019-10-14 21:47:59,502 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 236 transitions. Word has length 65 [2019-10-14 21:47:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:59,502 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 236 transitions. [2019-10-14 21:47:59,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:47:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 236 transitions. [2019-10-14 21:47:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:47:59,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:59,503 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:59,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:59,707 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:59,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:59,707 INFO L82 PathProgramCache]: Analyzing trace with hash 681832897, now seen corresponding path program 27 times [2019-10-14 21:47:59,708 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:59,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442064296] [2019-10-14 21:47:59,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:59,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:00,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442064296] [2019-10-14 21:48:00,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375238890] [2019-10-14 21:48:00,225 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:00,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-10-14 21:48:00,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:00,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:48:00,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:00,614 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:00,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-10-14 21:48:00,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875116006] [2019-10-14 21:48:00,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:48:00,615 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:00,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:48:00,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:48:00,616 INFO L87 Difference]: Start difference. First operand 207 states and 236 transitions. Second operand 32 states. [2019-10-14 21:48:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:01,390 INFO L93 Difference]: Finished difference Result 362 states and 422 transitions. [2019-10-14 21:48:01,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:48:01,391 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2019-10-14 21:48:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:01,392 INFO L225 Difference]: With dead ends: 362 [2019-10-14 21:48:01,393 INFO L226 Difference]: Without dead ends: 216 [2019-10-14 21:48:01,394 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:48:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-14 21:48:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2019-10-14 21:48:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-10-14 21:48:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2019-10-14 21:48:01,402 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 67 [2019-10-14 21:48:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:01,402 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2019-10-14 21:48:01,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:48:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2019-10-14 21:48:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:48:01,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:01,403 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:01,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:01,608 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:01,608 INFO L82 PathProgramCache]: Analyzing trace with hash -2006394081, now seen corresponding path program 28 times [2019-10-14 21:48:01,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:01,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86065022] [2019-10-14 21:48:01,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:01,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:02,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86065022] [2019-10-14 21:48:02,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725399296] [2019-10-14 21:48:02,004 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:02,074 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:02,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:02,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:48:02,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:02,110 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:02,110 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 21:48:02,110 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700185036] [2019-10-14 21:48:02,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:48:02,111 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:02,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:48:02,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:48:02,112 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand 33 states. [2019-10-14 21:48:02,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:02,883 INFO L93 Difference]: Finished difference Result 374 states and 436 transitions. [2019-10-14 21:48:02,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:48:02,883 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 69 [2019-10-14 21:48:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:02,885 INFO L225 Difference]: With dead ends: 374 [2019-10-14 21:48:02,886 INFO L226 Difference]: Without dead ends: 223 [2019-10-14 21:48:02,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:48:02,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-10-14 21:48:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2019-10-14 21:48:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-10-14 21:48:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 252 transitions. [2019-10-14 21:48:02,901 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 252 transitions. Word has length 69 [2019-10-14 21:48:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:02,902 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 252 transitions. [2019-10-14 21:48:02,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:48:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 252 transitions. [2019-10-14 21:48:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:48:02,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:02,904 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:03,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:03,110 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:03,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:03,110 INFO L82 PathProgramCache]: Analyzing trace with hash 177792253, now seen corresponding path program 29 times [2019-10-14 21:48:03,110 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:03,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591850362] [2019-10-14 21:48:03,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:03,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:03,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:03,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591850362] [2019-10-14 21:48:03,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358228264] [2019-10-14 21:48:03,555 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:04,250 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-10-14 21:48:04,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:04,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:48:04,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:04,271 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:04,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-10-14 21:48:04,272 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649720445] [2019-10-14 21:48:04,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 21:48:04,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:04,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 21:48:04,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:48:04,273 INFO L87 Difference]: Start difference. First operand 221 states and 252 transitions. Second operand 34 states. [2019-10-14 21:48:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:04,851 INFO L93 Difference]: Finished difference Result 386 states and 450 transitions. [2019-10-14 21:48:04,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 21:48:04,851 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 71 [2019-10-14 21:48:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:04,853 INFO L225 Difference]: With dead ends: 386 [2019-10-14 21:48:04,853 INFO L226 Difference]: Without dead ends: 230 [2019-10-14 21:48:04,855 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:48:04,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-10-14 21:48:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2019-10-14 21:48:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-10-14 21:48:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 260 transitions. [2019-10-14 21:48:04,863 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 260 transitions. Word has length 71 [2019-10-14 21:48:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:04,863 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 260 transitions. [2019-10-14 21:48:04,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 21:48:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 260 transitions. [2019-10-14 21:48:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:48:04,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:04,864 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:05,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:05,070 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1058148517, now seen corresponding path program 30 times [2019-10-14 21:48:05,071 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:05,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411170517] [2019-10-14 21:48:05,071 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:05,072 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:05,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:05,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411170517] [2019-10-14 21:48:05,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058824943] [2019-10-14 21:48:05,797 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:06,993 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-10-14 21:48:06,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:06,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 21:48:06,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:07,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:07,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2019-10-14 21:48:07,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863856152] [2019-10-14 21:48:07,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 21:48:07,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:07,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 21:48:07,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:48:07,017 INFO L87 Difference]: Start difference. First operand 228 states and 260 transitions. Second operand 35 states. [2019-10-14 21:48:07,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:07,806 INFO L93 Difference]: Finished difference Result 398 states and 464 transitions. [2019-10-14 21:48:07,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 21:48:07,807 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 73 [2019-10-14 21:48:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:07,809 INFO L225 Difference]: With dead ends: 398 [2019-10-14 21:48:07,809 INFO L226 Difference]: Without dead ends: 237 [2019-10-14 21:48:07,811 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 21:48:07,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-10-14 21:48:07,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2019-10-14 21:48:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2019-10-14 21:48:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 268 transitions. [2019-10-14 21:48:07,822 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 268 transitions. Word has length 73 [2019-10-14 21:48:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:07,822 INFO L462 AbstractCegarLoop]: Abstraction has 235 states and 268 transitions. [2019-10-14 21:48:07,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 21:48:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 268 transitions. [2019-10-14 21:48:07,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 21:48:07,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:07,824 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:08,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,031 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:08,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:08,032 INFO L82 PathProgramCache]: Analyzing trace with hash 908712505, now seen corresponding path program 31 times [2019-10-14 21:48:08,032 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:08,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200260532] [2019-10-14 21:48:08,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:08,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:08,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200260532] [2019-10-14 21:48:08,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284835413] [2019-10-14 21:48:08,507 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:08,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 21:48:08,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:08,593 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:08,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-14 21:48:08,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333384644] [2019-10-14 21:48:08,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:48:08,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:08,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:48:08,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:48:08,595 INFO L87 Difference]: Start difference. First operand 235 states and 268 transitions. Second operand 36 states. [2019-10-14 21:48:09,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:09,463 INFO L93 Difference]: Finished difference Result 410 states and 478 transitions. [2019-10-14 21:48:09,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:48:09,464 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 75 [2019-10-14 21:48:09,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:09,466 INFO L225 Difference]: With dead ends: 410 [2019-10-14 21:48:09,466 INFO L226 Difference]: Without dead ends: 244 [2019-10-14 21:48:09,468 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:48:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-10-14 21:48:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2019-10-14 21:48:09,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-10-14 21:48:09,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 276 transitions. [2019-10-14 21:48:09,476 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 276 transitions. Word has length 75 [2019-10-14 21:48:09,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:09,477 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 276 transitions. [2019-10-14 21:48:09,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:48:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 276 transitions. [2019-10-14 21:48:09,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 21:48:09,477 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:09,478 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:09,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:09,681 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:09,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:09,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1276544407, now seen corresponding path program 32 times [2019-10-14 21:48:09,682 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:09,682 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991586156] [2019-10-14 21:48:09,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:09,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:10,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991586156] [2019-10-14 21:48:10,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941939431] [2019-10-14 21:48:10,186 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:10,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:10,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:10,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:48:10,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:10,275 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:10,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-14 21:48:10,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778021551] [2019-10-14 21:48:10,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:48:10,276 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:48:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:48:10,277 INFO L87 Difference]: Start difference. First operand 242 states and 276 transitions. Second operand 37 states. [2019-10-14 21:48:10,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:10,970 INFO L93 Difference]: Finished difference Result 422 states and 492 transitions. [2019-10-14 21:48:10,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:48:10,970 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 77 [2019-10-14 21:48:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:10,972 INFO L225 Difference]: With dead ends: 422 [2019-10-14 21:48:10,972 INFO L226 Difference]: Without dead ends: 251 [2019-10-14 21:48:10,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:48:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-10-14 21:48:10,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2019-10-14 21:48:10,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-10-14 21:48:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 284 transitions. [2019-10-14 21:48:10,981 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 284 transitions. Word has length 77 [2019-10-14 21:48:10,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:10,982 INFO L462 AbstractCegarLoop]: Abstraction has 249 states and 284 transitions. [2019-10-14 21:48:10,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:48:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 284 transitions. [2019-10-14 21:48:10,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-10-14 21:48:10,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:10,983 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:11,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:11,187 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:11,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:11,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1719283339, now seen corresponding path program 33 times [2019-10-14 21:48:11,187 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:11,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306698042] [2019-10-14 21:48:11,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:11,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:11,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:11,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:11,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306698042] [2019-10-14 21:48:11,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952124147] [2019-10-14 21:48:11,766 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:12,303 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-10-14 21:48:12,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:12,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 21:48:12,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:12,322 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:12,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2019-10-14 21:48:12,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066105458] [2019-10-14 21:48:12,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 21:48:12,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:12,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 21:48:12,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:48:12,325 INFO L87 Difference]: Start difference. First operand 249 states and 284 transitions. Second operand 38 states. [2019-10-14 21:48:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:13,133 INFO L93 Difference]: Finished difference Result 434 states and 506 transitions. [2019-10-14 21:48:13,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-14 21:48:13,134 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2019-10-14 21:48:13,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:13,136 INFO L225 Difference]: With dead ends: 434 [2019-10-14 21:48:13,136 INFO L226 Difference]: Without dead ends: 258 [2019-10-14 21:48:13,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:48:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-10-14 21:48:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2019-10-14 21:48:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-10-14 21:48:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 292 transitions. [2019-10-14 21:48:13,146 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 292 transitions. Word has length 79 [2019-10-14 21:48:13,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:13,146 INFO L462 AbstractCegarLoop]: Abstraction has 256 states and 292 transitions. [2019-10-14 21:48:13,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 21:48:13,146 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 292 transitions. [2019-10-14 21:48:13,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-14 21:48:13,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:13,147 INFO L380 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:13,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:13,352 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:13,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1213308371, now seen corresponding path program 34 times [2019-10-14 21:48:13,353 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:13,353 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189440198] [2019-10-14 21:48:13,353 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,353 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:13,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:13,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189440198] [2019-10-14 21:48:13,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203848920] [2019-10-14 21:48:13,970 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:14,045 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:14,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:14,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 21:48:14,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:14,065 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:48:14,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-10-14 21:48:14,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987936414] [2019-10-14 21:48:14,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 21:48:14,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:14,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 21:48:14,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:48:14,067 INFO L87 Difference]: Start difference. First operand 256 states and 292 transitions. Second operand 39 states.