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/reducercommutativity/max60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:34,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:34,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:34,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:34,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:34,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:34,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:34,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:34,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:34,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:34,419 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:34,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:34,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:34,425 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:34,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:34,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:34,431 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:34,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:34,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:34,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:34,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:34,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:34,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:34,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:34,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:34,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:34,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:34,461 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:34,462 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:34,463 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:34,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:34,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:34,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:34,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:34,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:34,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:34,468 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 23:42:34,486 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:34,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:34,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:34,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:34,488 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:34,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:34,489 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:34,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:34,489 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:34,489 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:34,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:34,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:34,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:34,492 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:34,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:34,492 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:34,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:34,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:34,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:34,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:34,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:34,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:34,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:34,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:34,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:34,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:34,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:34,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:34,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:34,823 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:34,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:34,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:34,848 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:34,848 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:34,849 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max60-2.i [2019-10-14 23:42:34,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec1e0b332/c1ed51af6738499990a48f2b7fa65584/FLAGace9334f6 [2019-10-14 23:42:35,362 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:35,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max60-2.i [2019-10-14 23:42:35,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec1e0b332/c1ed51af6738499990a48f2b7fa65584/FLAGace9334f6 [2019-10-14 23:42:35,726 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec1e0b332/c1ed51af6738499990a48f2b7fa65584 [2019-10-14 23:42:35,734 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:35,735 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:35,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:35,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:35,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:35,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:35" (1/1) ... [2019-10-14 23:42:35,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77676ff4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:35, skipping insertion in model container [2019-10-14 23:42:35,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:35" (1/1) ... [2019-10-14 23:42:35,752 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:35,770 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:35,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:35,971 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:36,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:36,014 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:36,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36 WrapperNode [2019-10-14 23:42:36,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:36,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:36,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:36,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:36,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36" (1/1) ... [2019-10-14 23:42:36,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36" (1/1) ... [2019-10-14 23:42:36,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36" (1/1) ... [2019-10-14 23:42:36,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36" (1/1) ... [2019-10-14 23:42:36,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36" (1/1) ... [2019-10-14 23:42:36,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36" (1/1) ... [2019-10-14 23:42:36,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36" (1/1) ... [2019-10-14 23:42:36,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:36,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:36,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:36,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:36,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36" (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 23:42:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-10-14 23:42:36,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-10-14 23:42:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:36,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:36,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:36,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:36,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:36,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:36,562 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:36,562 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:36,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:36 BoogieIcfgContainer [2019-10-14 23:42:36,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:36,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:36,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:36,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:36,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:35" (1/3) ... [2019-10-14 23:42:36,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f6d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:36, skipping insertion in model container [2019-10-14 23:42:36,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:36" (2/3) ... [2019-10-14 23:42:36,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f6d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:36, skipping insertion in model container [2019-10-14 23:42:36,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:36" (3/3) ... [2019-10-14 23:42:36,571 INFO L109 eAbstractionObserver]: Analyzing ICFG max60-2.i [2019-10-14 23:42:36,579 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:36,586 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:36,596 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:36,621 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:36,621 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:36,621 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:36,621 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:36,621 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:36,621 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:36,621 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:36,621 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:36,639 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 23:42:36,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:36,646 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:36,647 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:36,649 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1379671032, now seen corresponding path program 1 times [2019-10-14 23:42:36,660 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:36,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012658976] [2019-10-14 23:42:36,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:36,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012658976] [2019-10-14 23:42:36,905 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:36,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:36,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991905139] [2019-10-14 23:42:36,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:36,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:36,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:36,929 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-10-14 23:42:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:37,077 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2019-10-14 23:42:37,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:37,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 23:42:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:37,089 INFO L225 Difference]: With dead ends: 60 [2019-10-14 23:42:37,090 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:42:37,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 23:42:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:42:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:42:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:42:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:42:37,136 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 32 [2019-10-14 23:42:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:37,136 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:42:37,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:42:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:42:37,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,140 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:37,141 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:37,142 INFO L82 PathProgramCache]: Analyzing trace with hash 551744077, now seen corresponding path program 1 times [2019-10-14 23:42:37,142 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:37,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085120309] [2019-10-14 23:42:37,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:42:37,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085120309] [2019-10-14 23:42:37,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322294712] [2019-10-14 23:42:37,297 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 23:42:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:37,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:42:37,398 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:37,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:42:37,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182000943] [2019-10-14 23:42:37,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:37,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:37,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:37,402 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-10-14 23:42:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:37,428 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2019-10-14 23:42:37,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:37,430 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:42:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:37,432 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:42:37,433 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:42:37,435 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 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 23:42:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:42:37,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-14 23:42:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:42:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:42:37,453 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2019-10-14 23:42:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:37,455 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:42:37,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:42:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:42:37,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,459 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:37,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:37,664 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:37,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:37,665 INFO L82 PathProgramCache]: Analyzing trace with hash 727331048, now seen corresponding path program 1 times [2019-10-14 23:42:37,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:37,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246582565] [2019-10-14 23:42:37,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:37,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246582565] [2019-10-14 23:42:37,819 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:37,820 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:37,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497678896] [2019-10-14 23:42:37,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:37,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:37,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:37,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:37,823 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2019-10-14 23:42:37,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:37,936 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-10-14 23:42:37,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:37,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-10-14 23:42:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:37,938 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:42:37,938 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:42:37,939 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 23:42:37,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:42:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 23:42:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:42:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-14 23:42:37,946 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 46 [2019-10-14 23:42:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:37,949 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-14 23:42:37,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-14 23:42:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:42:37,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,951 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:37,951 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:37,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:37,951 INFO L82 PathProgramCache]: Analyzing trace with hash -270429754, now seen corresponding path program 1 times [2019-10-14 23:42:37,952 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:37,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468090840] [2019-10-14 23:42:37,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:38,096 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468090840] [2019-10-14 23:42:38,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10758624] [2019-10-14 23:42:38,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:42:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:38,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:38,209 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:38,209 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:42:38,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81496403] [2019-10-14 23:42:38,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:38,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:38,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:38,212 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2019-10-14 23:42:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:38,313 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 23:42:38,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:38,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2019-10-14 23:42:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:38,315 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:38,315 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:42:38,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 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 23:42:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:42:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 23:42:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:42:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-14 23:42:38,322 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 48 [2019-10-14 23:42:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:38,323 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-14 23:42:38,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:38,323 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-14 23:42:38,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:42:38,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:38,325 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:38,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:38,536 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:38,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:38,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1585951496, now seen corresponding path program 2 times [2019-10-14 23:42:38,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:38,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896593087] [2019-10-14 23:42:38,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:38,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896593087] [2019-10-14 23:42:38,652 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93818023] [2019-10-14 23:42:38,653 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 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 23:42:38,712 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:38,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:38,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:38,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:38,736 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:38,736 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:42:38,736 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555965606] [2019-10-14 23:42:38,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:38,737 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:38,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:38,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:38,738 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2019-10-14 23:42:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:38,841 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-10-14 23:42:38,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:38,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 23:42:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:38,845 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:42:38,846 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:42:38,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 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 23:42:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:42:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 23:42:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:42:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-14 23:42:38,853 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 50 [2019-10-14 23:42:38,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:38,853 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-14 23:42:38,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-14 23:42:38,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:42:38,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:38,855 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:39,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:39,060 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:39,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1138062390, now seen corresponding path program 3 times [2019-10-14 23:42:39,061 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:39,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340345992] [2019-10-14 23:42:39,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 23:42:39,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340345992] [2019-10-14 23:42:39,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575530610] [2019-10-14 23:42:39,190 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 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 23:42:39,249 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:42:39,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:39,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:39,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 23:42:39,309 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:39,309 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:42:39,309 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994967927] [2019-10-14 23:42:39,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:39,312 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:39,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:39,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:39,313 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 9 states. [2019-10-14 23:42:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:39,446 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2019-10-14 23:42:39,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:39,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 23:42:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:39,448 INFO L225 Difference]: With dead ends: 67 [2019-10-14 23:42:39,448 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:42:39,449 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:42:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-10-14 23:42:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:42:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 23:42:39,455 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 52 [2019-10-14 23:42:39,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:39,456 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 23:42:39,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 23:42:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:42:39,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:39,457 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:39,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:39,662 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:39,662 INFO L82 PathProgramCache]: Analyzing trace with hash 454933031, now seen corresponding path program 4 times [2019-10-14 23:42:39,663 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:39,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394640727] [2019-10-14 23:42:39,663 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,664 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 23:42:39,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394640727] [2019-10-14 23:42:39,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407807465] [2019-10-14 23:42:39,782 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 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 23:42:39,856 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:39,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:39,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:39,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 23:42:39,888 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:39,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:42:39,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934851494] [2019-10-14 23:42:39,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:39,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:39,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:39,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:39,891 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2019-10-14 23:42:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:40,020 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-10-14 23:42:40,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:40,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2019-10-14 23:42:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:40,022 INFO L225 Difference]: With dead ends: 70 [2019-10-14 23:42:40,022 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:42:40,023 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 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 23:42:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:42:40,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-14 23:42:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:42:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-10-14 23:42:40,037 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 66 [2019-10-14 23:42:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:40,037 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-10-14 23:42:40,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-10-14 23:42:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 23:42:40,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:40,039 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:40,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,242 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1758121705, now seen corresponding path program 5 times [2019-10-14 23:42:40,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:40,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645249794] [2019-10-14 23:42:40,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 23:42:40,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645249794] [2019-10-14 23:42:40,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403827478] [2019-10-14 23:42:40,376 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 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 23:42:40,464 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:42:40,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:40,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:40,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-14 23:42:40,529 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:40,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 23:42:40,529 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82734538] [2019-10-14 23:42:40,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:40,530 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:40,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:40,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:40,531 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 12 states. [2019-10-14 23:42:40,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:40,723 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2019-10-14 23:42:40,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:40,724 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2019-10-14 23:42:40,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:40,725 INFO L225 Difference]: With dead ends: 79 [2019-10-14 23:42:40,725 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:42:40,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:42:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2019-10-14 23:42:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:42:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-10-14 23:42:40,737 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 68 [2019-10-14 23:42:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:40,738 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-10-14 23:42:40,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-10-14 23:42:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:42:40,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:40,743 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:40,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,944 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1391411910, now seen corresponding path program 6 times [2019-10-14 23:42:40,946 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:40,946 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523809829] [2019-10-14 23:42:40,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,946 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-14 23:42:41,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523809829] [2019-10-14 23:42:41,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702211831] [2019-10-14 23:42:41,064 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 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 23:42:41,134 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:42:41,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:41,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:41,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 94 proven. 1 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-14 23:42:41,170 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:41,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-14 23:42:41,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145591071] [2019-10-14 23:42:41,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:41,171 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:41,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:41,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:41,173 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 12 states. [2019-10-14 23:42:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:41,299 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-10-14 23:42:41,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:41,300 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2019-10-14 23:42:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:41,301 INFO L225 Difference]: With dead ends: 85 [2019-10-14 23:42:41,301 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:42:41,302 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:42:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-10-14 23:42:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:42:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-10-14 23:42:41,308 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 82 [2019-10-14 23:42:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:41,308 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-10-14 23:42:41,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-10-14 23:42:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 23:42:41,310 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:41,310 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:41,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:41,524 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash 197997542, now seen corresponding path program 7 times [2019-10-14 23:42:41,525 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:41,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040592557] [2019-10-14 23:42:41,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:41,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040592557] [2019-10-14 23:42:41,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085317994] [2019-10-14 23:42:41,673 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 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 23:42:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:41,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:41,773 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:41,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:42:41,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372757727] [2019-10-14 23:42:41,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:41,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:41,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:41,775 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2019-10-14 23:42:41,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:41,910 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2019-10-14 23:42:41,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:41,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2019-10-14 23:42:41,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:41,912 INFO L225 Difference]: With dead ends: 88 [2019-10-14 23:42:41,912 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 23:42:41,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 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 23:42:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 23:42:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-14 23:42:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 23:42:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-10-14 23:42:41,928 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 86 [2019-10-14 23:42:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:41,928 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-10-14 23:42:41,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:41,928 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-10-14 23:42:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 23:42:41,935 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:41,935 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:42,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,137 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1074942888, now seen corresponding path program 8 times [2019-10-14 23:42:42,138 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780143019] [2019-10-14 23:42:42,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:42,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780143019] [2019-10-14 23:42:42,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380035277] [2019-10-14 23:42:42,288 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 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 23:42:42,364 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:42,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:42,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:42,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:42,390 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:42,390 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:42:42,390 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544410302] [2019-10-14 23:42:42,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:42,391 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:42,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:42,392 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 13 states. [2019-10-14 23:42:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:42,540 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2019-10-14 23:42:42,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:42,541 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2019-10-14 23:42:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:42,542 INFO L225 Difference]: With dead ends: 90 [2019-10-14 23:42:42,542 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 23:42:42,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 23:42:42,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 23:42:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:42:42,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-10-14 23:42:42,549 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 88 [2019-10-14 23:42:42,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,550 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-10-14 23:42:42,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-10-14 23:42:42,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 23:42:42,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,551 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:42,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,756 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2005830378, now seen corresponding path program 9 times [2019-10-14 23:42:42,757 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,757 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195812015] [2019-10-14 23:42:42,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-14 23:42:42,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195812015] [2019-10-14 23:42:42,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733233152] [2019-10-14 23:42:42,928 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 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 23:42:42,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:42:42,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:42,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 94 proven. 4 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2019-10-14 23:42:43,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:43,049 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 23:42:43,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40545212] [2019-10-14 23:42:43,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:42:43,051 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:42:43,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:43,051 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 16 states. [2019-10-14 23:42:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,235 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2019-10-14 23:42:43,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:42:43,236 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2019-10-14 23:42:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,237 INFO L225 Difference]: With dead ends: 95 [2019-10-14 23:42:43,237 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:42:43,238 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:42:43,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 23:42:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:42:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2019-10-14 23:42:43,243 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 90 [2019-10-14 23:42:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,244 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2019-10-14 23:42:43,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:42:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2019-10-14 23:42:43,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:42:43,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,245 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:43,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,456 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1656201482, now seen corresponding path program 10 times [2019-10-14 23:42:43,457 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877472496] [2019-10-14 23:42:43,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-10-14 23:42:43,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877472496] [2019-10-14 23:42:43,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863024114] [2019-10-14 23:42:43,616 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 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 23:42:43,703 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:43,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:43,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-10-14 23:42:43,751 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:43,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 23:42:43,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692759890] [2019-10-14 23:42:43,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:42:43,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:42:43,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:43,753 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2019-10-14 23:42:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,920 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2019-10-14 23:42:43,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:42:43,920 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2019-10-14 23:42:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,921 INFO L225 Difference]: With dead ends: 98 [2019-10-14 23:42:43,921 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 23:42:43,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 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 23:42:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 23:42:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-14 23:42:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 23:42:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-10-14 23:42:43,927 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 94 [2019-10-14 23:42:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,927 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-10-14 23:42:43,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:42:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-10-14 23:42:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:42:43,928 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,928 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:44,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,138 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:44,139 INFO L82 PathProgramCache]: Analyzing trace with hash 659152588, now seen corresponding path program 11 times [2019-10-14 23:42:44,139 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:44,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129067141] [2019-10-14 23:42:44,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-10-14 23:42:44,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129067141] [2019-10-14 23:42:44,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971558443] [2019-10-14 23:42:44,308 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 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 23:42:44,593 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 23:42:44,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:44,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:44,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 88 proven. 15 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2019-10-14 23:42:44,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:44,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2019-10-14 23:42:44,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569571131] [2019-10-14 23:42:44,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:44,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:44,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:44,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:44,674 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 19 states. [2019-10-14 23:42:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:44,887 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2019-10-14 23:42:44,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:42:44,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-10-14 23:42:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:44,889 INFO L225 Difference]: With dead ends: 107 [2019-10-14 23:42:44,889 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:42:44,890 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:42:44,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:42:44,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2019-10-14 23:42:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 23:42:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2019-10-14 23:42:44,895 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 96 [2019-10-14 23:42:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:44,896 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2019-10-14 23:42:44,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2019-10-14 23:42:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 23:42:44,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:44,898 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:45,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,103 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:45,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1708395305, now seen corresponding path program 12 times [2019-10-14 23:42:45,104 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:45,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396554416] [2019-10-14 23:42:45,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-10-14 23:42:45,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396554416] [2019-10-14 23:42:45,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337408758] [2019-10-14 23:42:45,322 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 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 23:42:45,477 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:42:45,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:45,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:45,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 154 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2019-10-14 23:42:45,543 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:45,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 23:42:45,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649439876] [2019-10-14 23:42:45,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:42:45,545 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:45,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:42:45,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:42:45,547 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 20 states. [2019-10-14 23:42:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:45,748 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2019-10-14 23:42:45,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:42:45,749 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2019-10-14 23:42:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:45,750 INFO L225 Difference]: With dead ends: 113 [2019-10-14 23:42:45,750 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:42:45,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:42:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:42:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2019-10-14 23:42:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:42:45,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2019-10-14 23:42:45,756 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 110 [2019-10-14 23:42:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:45,756 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2019-10-14 23:42:45,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:42:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2019-10-14 23:42:45,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 23:42:45,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:45,758 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:45,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,963 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:45,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash -356697015, now seen corresponding path program 13 times [2019-10-14 23:42:45,964 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:45,964 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053101499] [2019-10-14 23:42:45,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:46,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053101499] [2019-10-14 23:42:46,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202157093] [2019-10-14 23:42:46,170 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 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 23:42:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:42:46,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:46,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:46,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 23:42:46,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671615693] [2019-10-14 23:42:46,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:42:46,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:46,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:42:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:42:46,316 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 18 states. [2019-10-14 23:42:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:46,510 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2019-10-14 23:42:46,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:42:46,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2019-10-14 23:42:46,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:46,511 INFO L225 Difference]: With dead ends: 116 [2019-10-14 23:42:46,511 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 23:42:46,512 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 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 23:42:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 23:42:46,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 23:42:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:42:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2019-10-14 23:42:46,518 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 114 [2019-10-14 23:42:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:46,518 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2019-10-14 23:42:46,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:42:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2019-10-14 23:42:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 23:42:46,519 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:46,519 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:46,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,724 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:46,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1330051829, now seen corresponding path program 14 times [2019-10-14 23:42:46,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:46,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904075069] [2019-10-14 23:42:46,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,725 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:46,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904075069] [2019-10-14 23:42:46,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093458112] [2019-10-14 23:42:46,944 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 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 23:42:47,033 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:47,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:47,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:47,063 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:47,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 23:42:47,063 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828253654] [2019-10-14 23:42:47,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:47,064 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:47,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:47,065 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 19 states. [2019-10-14 23:42:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,218 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2019-10-14 23:42:47,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:42:47,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 116 [2019-10-14 23:42:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,219 INFO L225 Difference]: With dead ends: 118 [2019-10-14 23:42:47,219 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 23:42:47,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 123 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 23:42:47,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 23:42:47,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 23:42:47,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 23:42:47,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2019-10-14 23:42:47,225 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 116 [2019-10-14 23:42:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:47,226 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2019-10-14 23:42:47,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:47,226 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2019-10-14 23:42:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-14 23:42:47,227 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:47,227 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 12, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:47,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,428 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:47,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash -421157555, now seen corresponding path program 15 times [2019-10-14 23:42:47,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:47,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282177478] [2019-10-14 23:42:47,429 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-10-14 23:42:47,733 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282177478] [2019-10-14 23:42:47,735 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171271554] [2019-10-14 23:42:47,735 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 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 23:42:47,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 23:42:47,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:47,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 152 proven. 28 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-10-14 23:42:47,964 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:47,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 23:42:47,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347619872] [2019-10-14 23:42:47,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:42:47,965 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:42:47,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:47,966 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 24 states. [2019-10-14 23:42:48,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:48,279 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2019-10-14 23:42:48,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:42:48,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2019-10-14 23:42:48,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:48,281 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:42:48,281 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 23:42:48,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:42:48,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 23:42:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2019-10-14 23:42:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 23:42:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2019-10-14 23:42:48,288 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 118 [2019-10-14 23:42:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:48,289 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2019-10-14 23:42:48,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:42:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2019-10-14 23:42:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:42:48,290 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:48,290 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:48,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,495 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1792802646, now seen corresponding path program 16 times [2019-10-14 23:42:48,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:48,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340566953] [2019-10-14 23:42:48,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-10-14 23:42:48,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340566953] [2019-10-14 23:42:48,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976265891] [2019-10-14 23:42:48,847 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 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 23:42:48,984 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:48,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:48,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:42:48,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-10-14 23:42:49,026 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:49,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 23:42:49,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548564845] [2019-10-14 23:42:49,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:42:49,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:49,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:42:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:49,029 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 21 states. [2019-10-14 23:42:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:49,232 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2019-10-14 23:42:49,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:42:49,233 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 132 [2019-10-14 23:42:49,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:49,234 INFO L225 Difference]: With dead ends: 130 [2019-10-14 23:42:49,234 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 23:42:49,234 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 23:42:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-10-14 23:42:49,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:42:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2019-10-14 23:42:49,239 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 132 [2019-10-14 23:42:49,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:49,240 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2019-10-14 23:42:49,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:42:49,240 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2019-10-14 23:42:49,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:42:49,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:49,241 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:49,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:49,452 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash -371467028, now seen corresponding path program 17 times [2019-10-14 23:42:49,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:49,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016617818] [2019-10-14 23:42:49,452 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-10-14 23:42:49,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016617818] [2019-10-14 23:42:49,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069647143] [2019-10-14 23:42:49,711 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 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 23:42:50,304 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 23:42:50,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:50,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:50,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 224 proven. 45 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2019-10-14 23:42:50,395 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:50,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-10-14 23:42:50,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166784034] [2019-10-14 23:42:50,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:42:50,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:50,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:42:50,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:50,397 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 27 states. [2019-10-14 23:42:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:50,790 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2019-10-14 23:42:50,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:42:50,791 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 134 [2019-10-14 23:42:50,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:50,792 INFO L225 Difference]: With dead ends: 139 [2019-10-14 23:42:50,792 INFO L226 Difference]: Without dead ends: 95 [2019-10-14 23:42:50,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:42:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-14 23:42:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2019-10-14 23:42:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:42:50,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-10-14 23:42:50,799 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 134 [2019-10-14 23:42:50,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:50,799 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-10-14 23:42:50,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:42:50,799 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-10-14 23:42:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 23:42:50,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:50,801 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:51,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:51,006 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:51,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:51,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1660813879, now seen corresponding path program 18 times [2019-10-14 23:42:51,008 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:51,008 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630574291] [2019-10-14 23:42:51,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:51,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:51,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-10-14 23:42:51,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630574291] [2019-10-14 23:42:51,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874535549] [2019-10-14 23:42:51,289 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 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 23:42:51,800 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 23:42:51,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:51,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:51,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 322 proven. 16 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2019-10-14 23:42:51,969 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:51,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-10-14 23:42:51,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477439202] [2019-10-14 23:42:51,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:42:51,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:51,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:42:51,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:51,971 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 27 states. [2019-10-14 23:42:52,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:52,179 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2019-10-14 23:42:52,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:42:52,179 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 148 [2019-10-14 23:42:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:52,180 INFO L225 Difference]: With dead ends: 145 [2019-10-14 23:42:52,181 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 23:42:52,181 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:52,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 23:42:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 23:42:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 23:42:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2019-10-14 23:42:52,187 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 148 [2019-10-14 23:42:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:52,187 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2019-10-14 23:42:52,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:42:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2019-10-14 23:42:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:42:52,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:52,189 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:52,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:52,389 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:52,390 INFO L82 PathProgramCache]: Analyzing trace with hash -462803735, now seen corresponding path program 19 times [2019-10-14 23:42:52,390 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:52,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797589705] [2019-10-14 23:42:52,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-10-14 23:42:52,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797589705] [2019-10-14 23:42:52,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372264433] [2019-10-14 23:42:52,719 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 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 23:42:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:52,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:42:52,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-10-14 23:42:52,879 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:52,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 23:42:52,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100481596] [2019-10-14 23:42:52,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:42:52,880 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:52,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:42:52,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:52,881 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 24 states. [2019-10-14 23:42:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:53,054 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2019-10-14 23:42:53,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:42:53,054 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 152 [2019-10-14 23:42:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:53,055 INFO L225 Difference]: With dead ends: 148 [2019-10-14 23:42:53,055 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 23:42:53,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 159 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 23:42:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 23:42:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 23:42:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 23:42:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2019-10-14 23:42:53,062 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 152 [2019-10-14 23:42:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:53,063 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2019-10-14 23:42:53,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:42:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2019-10-14 23:42:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 23:42:53,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:53,065 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:53,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:53,277 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:53,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1779127339, now seen corresponding path program 20 times [2019-10-14 23:42:53,278 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:53,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502147586] [2019-10-14 23:42:53,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:53,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:53,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-10-14 23:42:53,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502147586] [2019-10-14 23:42:53,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683222603] [2019-10-14 23:42:53,596 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 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 23:42:53,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:53,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:53,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 23:42:53,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-10-14 23:42:53,752 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:53,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 23:42:53,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131248347] [2019-10-14 23:42:53,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:42:53,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:42:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:42:53,754 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 25 states. [2019-10-14 23:42:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:54,044 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2019-10-14 23:42:54,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:42:54,044 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 154 [2019-10-14 23:42:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:54,045 INFO L225 Difference]: With dead ends: 150 [2019-10-14 23:42:54,046 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 23:42:54,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 161 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 23:42:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 23:42:54,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-14 23:42:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 23:42:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2019-10-14 23:42:54,052 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 154 [2019-10-14 23:42:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:54,052 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2019-10-14 23:42:54,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:42:54,052 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2019-10-14 23:42:54,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:42:54,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:54,053 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:54,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:54,254 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:54,254 INFO L82 PathProgramCache]: Analyzing trace with hash 201306861, now seen corresponding path program 21 times [2019-10-14 23:42:54,255 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:54,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743140624] [2019-10-14 23:42:54,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1147 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-10-14 23:42:54,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743140624] [2019-10-14 23:42:54,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166035878] [2019-10-14 23:42:54,590 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 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 23:42:54,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 23:42:54,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:54,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:54,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1147 backedges. 322 proven. 25 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-10-14 23:42:54,843 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:54,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2019-10-14 23:42:54,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261917310] [2019-10-14 23:42:54,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:42:54,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:54,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:42:54,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:42:54,845 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 31 states. [2019-10-14 23:42:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:55,136 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2019-10-14 23:42:55,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:42:55,137 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2019-10-14 23:42:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:55,138 INFO L225 Difference]: With dead ends: 155 [2019-10-14 23:42:55,138 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 23:42:55,139 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:42:55,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 23:42:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-10-14 23:42:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 23:42:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2019-10-14 23:42:55,144 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 156 [2019-10-14 23:42:55,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:55,144 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2019-10-14 23:42:55,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:42:55,144 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2019-10-14 23:42:55,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:42:55,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:55,145 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:55,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:55,349 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:55,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1557379315, now seen corresponding path program 22 times [2019-10-14 23:42:55,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:55,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306932130] [2019-10-14 23:42:55,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:55,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:55,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-10-14 23:42:55,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306932130] [2019-10-14 23:42:55,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422744112] [2019-10-14 23:42:55,792 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 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 23:42:55,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:55,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:55,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:42:55,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-10-14 23:42:55,942 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:55,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 23:42:55,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808850914] [2019-10-14 23:42:55,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:42:55,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:55,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:42:55,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:55,944 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand 27 states. [2019-10-14 23:42:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:56,253 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2019-10-14 23:42:56,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:42:56,253 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 160 [2019-10-14 23:42:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:56,255 INFO L225 Difference]: With dead ends: 158 [2019-10-14 23:42:56,255 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 23:42:56,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 167 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 23:42:56,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 23:42:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-10-14 23:42:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 23:42:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2019-10-14 23:42:56,262 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 160 [2019-10-14 23:42:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:56,262 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2019-10-14 23:42:56,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:42:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2019-10-14 23:42:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 23:42:56,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:56,265 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 18, 18, 18, 18, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:56,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:56,471 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:56,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1638200241, now seen corresponding path program 23 times [2019-10-14 23:42:56,472 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:56,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111505261] [2019-10-14 23:42:56,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2019-10-14 23:42:56,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111505261] [2019-10-14 23:42:56,851 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048018171] [2019-10-14 23:42:56,851 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 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 23:42:58,284 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-14 23:42:58,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:58,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:58,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2019-10-14 23:42:58,477 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:58,477 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2019-10-14 23:42:58,477 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587652588] [2019-10-14 23:42:58,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:42:58,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:58,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:42:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=760, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:42:58,479 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 34 states. [2019-10-14 23:42:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:59,041 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2019-10-14 23:42:59,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:42:59,042 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2019-10-14 23:42:59,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:59,043 INFO L225 Difference]: With dead ends: 167 [2019-10-14 23:42:59,043 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 23:42:59,045 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:42:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 23:42:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2019-10-14 23:42:59,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 23:42:59,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2019-10-14 23:42:59,052 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 162 [2019-10-14 23:42:59,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:59,052 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2019-10-14 23:42:59,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:42:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2019-10-14 23:42:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-14 23:42:59,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:59,053 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:59,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:59,260 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:59,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:59,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1915017812, now seen corresponding path program 24 times [2019-10-14 23:42:59,261 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:59,261 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142537506] [2019-10-14 23:42:59,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:59,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 954 trivial. 0 not checked. [2019-10-14 23:42:59,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142537506] [2019-10-14 23:42:59,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485669723] [2019-10-14 23:42:59,727 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 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 23:43:00,872 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-10-14 23:43:00,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:00,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:43:00,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 430 proven. 36 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2019-10-14 23:43:01,045 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:01,045 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2019-10-14 23:43:01,045 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852881349] [2019-10-14 23:43:01,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 23:43:01,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 23:43:01,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:43:01,047 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 35 states. [2019-10-14 23:43:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:01,394 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2019-10-14 23:43:01,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 23:43:01,395 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 176 [2019-10-14 23:43:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:01,396 INFO L225 Difference]: With dead ends: 173 [2019-10-14 23:43:01,396 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 23:43:01,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:43:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 23:43:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-10-14 23:43:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 23:43:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2019-10-14 23:43:01,402 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 176 [2019-10-14 23:43:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,403 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2019-10-14 23:43:01,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 23:43:01,403 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2019-10-14 23:43:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-14 23:43:01,404 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:01,404 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 21, 21, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:01,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,610 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:01,611 INFO L82 PathProgramCache]: Analyzing trace with hash -664873780, now seen corresponding path program 25 times [2019-10-14 23:43:01,611 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:01,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393428210] [2019-10-14 23:43:01,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1592 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-10-14 23:43:02,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393428210] [2019-10-14 23:43:02,091 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926380122] [2019-10-14 23:43:02,091 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 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 23:43:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:43:02,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1592 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-10-14 23:43:02,284 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:02,284 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 23:43:02,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542285611] [2019-10-14 23:43:02,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:43:02,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:02,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:43:02,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:43:02,286 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 30 states. [2019-10-14 23:43:02,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:02,568 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2019-10-14 23:43:02,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:43:02,568 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 180 [2019-10-14 23:43:02,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:02,569 INFO L225 Difference]: With dead ends: 176 [2019-10-14 23:43:02,569 INFO L226 Difference]: Without dead ends: 118 [2019-10-14 23:43:02,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 187 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 23:43:02,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-14 23:43:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-10-14 23:43:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 23:43:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2019-10-14 23:43:02,579 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 180 [2019-10-14 23:43:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:02,580 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2019-10-14 23:43:02,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:43:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2019-10-14 23:43:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 23:43:02,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:02,582 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 21, 21, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:02,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:02,786 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:02,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1692951822, now seen corresponding path program 26 times [2019-10-14 23:43:02,787 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:02,787 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971590268] [2019-10-14 23:43:02,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:02,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-10-14 23:43:03,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971590268] [2019-10-14 23:43:03,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980705423] [2019-10-14 23:43:03,354 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 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 23:43:03,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:43:03,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:03,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:43:03,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:03,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-10-14 23:43:03,521 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:03,521 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 23:43:03,521 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666633773] [2019-10-14 23:43:03,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:43:03,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:03,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:43:03,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:43:03,523 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand 31 states. [2019-10-14 23:43:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:03,836 INFO L93 Difference]: Finished difference Result 178 states and 200 transitions. [2019-10-14 23:43:03,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:43:03,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 182 [2019-10-14 23:43:03,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:03,839 INFO L225 Difference]: With dead ends: 178 [2019-10-14 23:43:03,839 INFO L226 Difference]: Without dead ends: 120 [2019-10-14 23:43:03,840 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 189 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 23:43:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-14 23:43:03,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-10-14 23:43:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-14 23:43:03,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2019-10-14 23:43:03,847 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 182 [2019-10-14 23:43:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:03,847 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2019-10-14 23:43:03,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:43:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2019-10-14 23:43:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 23:43:03,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:03,849 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 21, 21, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:04,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:04,054 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:04,055 INFO L82 PathProgramCache]: Analyzing trace with hash -179376944, now seen corresponding path program 27 times [2019-10-14 23:43:04,055 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:04,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185524089] [2019-10-14 23:43:04,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:04,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:04,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 967 trivial. 0 not checked. [2019-10-14 23:43:04,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185524089] [2019-10-14 23:43:04,524 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909372643] [2019-10-14 23:43:04,524 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 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 23:43:04,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 23:43:04,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:04,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:43:04,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 428 proven. 91 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-10-14 23:43:04,930 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:04,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2019-10-14 23:43:04,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826743369] [2019-10-14 23:43:04,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 23:43:04,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 23:43:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1001, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:43:04,933 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 39 states. [2019-10-14 23:43:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:05,577 INFO L93 Difference]: Finished difference Result 187 states and 215 transitions. [2019-10-14 23:43:05,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 23:43:05,578 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 184 [2019-10-14 23:43:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:05,579 INFO L225 Difference]: With dead ends: 187 [2019-10-14 23:43:05,579 INFO L226 Difference]: Without dead ends: 129 [2019-10-14 23:43:05,580 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2019-10-14 23:43:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-14 23:43:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2019-10-14 23:43:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 23:43:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2019-10-14 23:43:05,589 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 184 [2019-10-14 23:43:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:05,589 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2019-10-14 23:43:05,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 23:43:05,589 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2019-10-14 23:43:05,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-14 23:43:05,592 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:05,592 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:05,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:05,797 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:05,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1322478291, now seen corresponding path program 28 times [2019-10-14 23:43:05,798 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:05,798 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345770664] [2019-10-14 23:43:05,798 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,799 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:05,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2019-10-14 23:43:06,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345770664] [2019-10-14 23:43:06,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003941558] [2019-10-14 23:43:06,299 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 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 23:43:06,433 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:06,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:06,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:43:06,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2019-10-14 23:43:06,497 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:06,497 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 23:43:06,497 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382257795] [2019-10-14 23:43:06,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:43:06,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:06,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:43:06,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:06,499 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 33 states. [2019-10-14 23:43:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:06,896 INFO L93 Difference]: Finished difference Result 190 states and 214 transitions. [2019-10-14 23:43:06,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:43:06,897 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 198 [2019-10-14 23:43:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:06,899 INFO L225 Difference]: With dead ends: 190 [2019-10-14 23:43:06,899 INFO L226 Difference]: Without dead ends: 128 [2019-10-14 23:43:06,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:06,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-14 23:43:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-10-14 23:43:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-14 23:43:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2019-10-14 23:43:06,912 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 198 [2019-10-14 23:43:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:06,913 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2019-10-14 23:43:06,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:43:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2019-10-14 23:43:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-14 23:43:06,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:06,915 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:43:07,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:07,122 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:07,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1784633583, now seen corresponding path program 29 times [2019-10-14 23:43:07,122 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:07,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968723174] [2019-10-14 23:43:07,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:07,123 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:07,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2019-10-14 23:43:07,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968723174] [2019-10-14 23:43:07,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298484792] [2019-10-14 23:43:07,630 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 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