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/max40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:29,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:29,615 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:29,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:29,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:29,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:29,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:29,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:29,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:29,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:29,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:29,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:29,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:29,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:29,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:29,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:29,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:29,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:29,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:29,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:29,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:29,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:29,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:29,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:29,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:42:29,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:29,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:29,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:29,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:29,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:29,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:29,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:29,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:29,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:29,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:29,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:29,674 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 23:42:29,692 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:29,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:29,693 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:29,693 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:29,693 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:29,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:29,694 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:29,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:29,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:29,695 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:29,695 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:29,695 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:29,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:29,695 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:29,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:29,696 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:29,696 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:29,696 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:29,696 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:29,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:29,697 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:29,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:29,697 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:29,697 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:29,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:29,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:29,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:29,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:29,698 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:29,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:29,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:29,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:29,991 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:29,991 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:29,992 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max40-1.i [2019-10-14 23:42:30,065 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61723e234/b07109038f5e4550a1edf9deaf20cc42/FLAGa84a4b75c [2019-10-14 23:42:30,501 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:30,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max40-1.i [2019-10-14 23:42:30,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61723e234/b07109038f5e4550a1edf9deaf20cc42/FLAGa84a4b75c [2019-10-14 23:42:30,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61723e234/b07109038f5e4550a1edf9deaf20cc42 [2019-10-14 23:42:30,920 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:30,922 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:30,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:30,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:30,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:30,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,930 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337d46e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:30, skipping insertion in model container [2019-10-14 23:42:30,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:30" (1/1) ... [2019-10-14 23:42:30,938 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:30,961 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:31,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:31,133 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:31,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:31,165 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:31,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31 WrapperNode [2019-10-14 23:42:31,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:31,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:31,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:31,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:31,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,258 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (1/1) ... [2019-10-14 23:42:31,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:31,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:31,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:31,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:31,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (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 23:42:31,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:31,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:31,343 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-10-14 23:42:31,343 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:31,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:31,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:31,343 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-10-14 23:42:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:31,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:31,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:31,627 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:31,627 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:31,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:31 BoogieIcfgContainer [2019-10-14 23:42:31,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:31,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:31,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:31,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:31,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:30" (1/3) ... [2019-10-14 23:42:31,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1d8194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:31, skipping insertion in model container [2019-10-14 23:42:31,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:31" (2/3) ... [2019-10-14 23:42:31,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1d8194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:31, skipping insertion in model container [2019-10-14 23:42:31,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:31" (3/3) ... [2019-10-14 23:42:31,648 INFO L109 eAbstractionObserver]: Analyzing ICFG max40-1.i [2019-10-14 23:42:31,658 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:31,670 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:31,682 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:31,707 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:31,707 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:31,707 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:31,708 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:31,708 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:31,708 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:31,708 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:31,708 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 23:42:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:42:31,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:31,739 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 23:42:31,742 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:31,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1379671032, now seen corresponding path program 1 times [2019-10-14 23:42:31,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:31,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26322122] [2019-10-14 23:42:31,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:31,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:31,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,009 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 23:42:32,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26322122] [2019-10-14 23:42:32,012 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:32,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:32,013 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601806622] [2019-10-14 23:42:32,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:32,023 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:32,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:32,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:32,042 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-10-14 23:42:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:32,194 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2019-10-14 23:42:32,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:32,196 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 23:42:32,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:32,206 INFO L225 Difference]: With dead ends: 60 [2019-10-14 23:42:32,206 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:42:32,216 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 23:42:32,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:42:32,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:42:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:42:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-14 23:42:32,266 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 32 [2019-10-14 23:42:32,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:32,267 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-14 23:42:32,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-14 23:42:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:42:32,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:32,270 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 23:42:32,271 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:32,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:32,271 INFO L82 PathProgramCache]: Analyzing trace with hash 551744077, now seen corresponding path program 1 times [2019-10-14 23:42:32,272 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:32,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41632737] [2019-10-14 23:42:32,272 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,409 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 23:42:32,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41632737] [2019-10-14 23:42:32,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464100397] [2019-10-14 23:42:32,410 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 23:42:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:32,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:32,505 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 23:42:32,506 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:32,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-14 23:42:32,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654528630] [2019-10-14 23:42:32,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:32,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:32,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:32,509 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-10-14 23:42:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:32,532 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2019-10-14 23:42:32,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:32,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-14 23:42:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:32,534 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:42:32,535 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:42:32,538 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 23:42:32,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:42:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-14 23:42:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:42:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:42:32,553 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2019-10-14 23:42:32,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:32,554 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:42:32,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:42:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:42:32,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:32,556 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 23:42:32,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:32,761 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:32,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:32,762 INFO L82 PathProgramCache]: Analyzing trace with hash 727331048, now seen corresponding path program 1 times [2019-10-14 23:42:32,763 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:32,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984580591] [2019-10-14 23:42:32,764 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,764 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:32,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:32,931 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 23:42:32,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984580591] [2019-10-14 23:42:32,932 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:32,932 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:32,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696120678] [2019-10-14 23:42:32,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:32,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:32,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:32,935 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2019-10-14 23:42:33,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:33,040 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-10-14 23:42:33,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:33,040 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2019-10-14 23:42:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:33,042 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:42:33,042 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:42:33,042 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 23:42:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:42:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-10-14 23:42:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:42:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-14 23:42:33,049 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 46 [2019-10-14 23:42:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:33,051 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-14 23:42:33,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-14 23:42:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:42:33,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:33,054 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 23:42:33,054 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash -270429754, now seen corresponding path program 1 times [2019-10-14 23:42:33,055 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:33,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496878617] [2019-10-14 23:42:33,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,198 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 23:42:33,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496878617] [2019-10-14 23:42:33,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532577225] [2019-10-14 23:42:33,201 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 23:42:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:33,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:33,300 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 23:42:33,301 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:33,301 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:42:33,301 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303431389] [2019-10-14 23:42:33,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:33,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:33,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:33,303 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2019-10-14 23:42:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:33,393 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-10-14 23:42:33,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:33,395 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2019-10-14 23:42:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:33,396 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:33,396 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:42:33,397 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 23:42:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:42:33,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 23:42:33,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:42:33,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-10-14 23:42:33,403 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 48 [2019-10-14 23:42:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:33,404 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-10-14 23:42:33,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-10-14 23:42:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:42:33,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:33,406 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 23:42:33,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:33,617 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1585951496, now seen corresponding path program 2 times [2019-10-14 23:42:33,618 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:33,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169482204] [2019-10-14 23:42:33,619 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:33,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:33,738 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 23:42:33,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169482204] [2019-10-14 23:42:33,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590303604] [2019-10-14 23:42:33,739 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 23:42:33,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:33,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:33,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:33,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:33,828 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 23:42:33,830 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:33,830 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:42:33,830 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015523624] [2019-10-14 23:42:33,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:33,831 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:33,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:33,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:33,832 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 7 states. [2019-10-14 23:42:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:33,912 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2019-10-14 23:42:33,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:33,917 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-14 23:42:33,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:33,918 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:42:33,919 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:42:33,919 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 23:42:33,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:42:33,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-14 23:42:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:42:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-14 23:42:33,927 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 50 [2019-10-14 23:42:33,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:33,928 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-14 23:42:33,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-14 23:42:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:42:33,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:33,929 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 23:42:34,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:34,131 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:34,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1138062390, now seen corresponding path program 3 times [2019-10-14 23:42:34,132 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:34,133 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719635530] [2019-10-14 23:42:34,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,133 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,238 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 23:42:34,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719635530] [2019-10-14 23:42:34,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976275013] [2019-10-14 23:42:34,239 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 23:42:34,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:42:34,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:34,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:34,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:34,341 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 23:42:34,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:34,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-14 23:42:34,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978690581] [2019-10-14 23:42:34,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:34,343 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:34,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:34,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:34,344 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 9 states. [2019-10-14 23:42:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:34,497 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2019-10-14 23:42:34,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:34,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-14 23:42:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:34,498 INFO L225 Difference]: With dead ends: 67 [2019-10-14 23:42:34,499 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:42:34,499 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:34,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:42:34,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2019-10-14 23:42:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:42:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 23:42:34,506 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 52 [2019-10-14 23:42:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:34,506 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 23:42:34,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 23:42:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:42:34,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:34,508 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 23:42:34,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:34,719 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:34,720 INFO L82 PathProgramCache]: Analyzing trace with hash 454933031, now seen corresponding path program 4 times [2019-10-14 23:42:34,720 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:34,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095150922] [2019-10-14 23:42:34,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:34,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:34,863 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 23:42:34,864 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095150922] [2019-10-14 23:42:34,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653626497] [2019-10-14 23:42:34,865 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 23:42:34,952 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:34,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:34,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:34,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:34,985 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 23:42:34,986 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:34,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 23:42:34,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203724859] [2019-10-14 23:42:34,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:34,988 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:34,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:34,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:34,989 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 9 states. [2019-10-14 23:42:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:35,096 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-10-14 23:42:35,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:35,097 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2019-10-14 23:42:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:35,097 INFO L225 Difference]: With dead ends: 70 [2019-10-14 23:42:35,098 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:42:35,098 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 23:42:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:42:35,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-14 23:42:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:42:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2019-10-14 23:42:35,104 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 66 [2019-10-14 23:42:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:35,105 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2019-10-14 23:42:35,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2019-10-14 23:42:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 23:42:35,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:35,106 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 23:42:35,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:35,311 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:35,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1758121705, now seen corresponding path program 5 times [2019-10-14 23:42:35,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:35,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104170730] [2019-10-14 23:42:35,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,313 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:35,413 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 23:42:35,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104170730] [2019-10-14 23:42:35,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658437560] [2019-10-14 23:42:35,414 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 23:42:35,492 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:42:35,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:35,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:35,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:35,535 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 23:42:35,538 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:35,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 23:42:35,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461056042] [2019-10-14 23:42:35,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:35,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:35,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:35,540 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 12 states. [2019-10-14 23:42:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:35,734 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2019-10-14 23:42:35,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:35,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2019-10-14 23:42:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:35,735 INFO L225 Difference]: With dead ends: 79 [2019-10-14 23:42:35,735 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:42:35,736 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 23:42:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:42:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2019-10-14 23:42:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:42:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-10-14 23:42:35,742 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 68 [2019-10-14 23:42:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:35,742 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-10-14 23:42:35,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-10-14 23:42:35,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:42:35,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:35,744 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 23:42:35,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:35,949 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1391411910, now seen corresponding path program 6 times [2019-10-14 23:42:35,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:35,951 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470397315] [2019-10-14 23:42:35,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:35,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,063 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 23:42:36,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470397315] [2019-10-14 23:42:36,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164396799] [2019-10-14 23:42:36,064 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 23:42:36,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 23:42:36,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:36,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:36,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:36,179 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 23:42:36,179 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:36,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-10-14 23:42:36,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803882488] [2019-10-14 23:42:36,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:36,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:36,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:36,182 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 12 states. [2019-10-14 23:42:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:36,290 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-10-14 23:42:36,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:36,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2019-10-14 23:42:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:36,292 INFO L225 Difference]: With dead ends: 85 [2019-10-14 23:42:36,292 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:42:36,293 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 23:42:36,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:42:36,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-10-14 23:42:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:42:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-10-14 23:42:36,302 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 82 [2019-10-14 23:42:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:36,303 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-10-14 23:42:36,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:36,303 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-10-14 23:42:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 23:42:36,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:36,306 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 23:42:36,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:36,513 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:36,514 INFO L82 PathProgramCache]: Analyzing trace with hash 197997542, now seen corresponding path program 7 times [2019-10-14 23:42:36,514 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:36,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158259384] [2019-10-14 23:42:36,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:36,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,641 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 23:42:36,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158259384] [2019-10-14 23:42:36,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796683656] [2019-10-14 23:42:36,642 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 23:42:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:36,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:36,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:36,758 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 23:42:36,758 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:36,758 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 23:42:36,759 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630275933] [2019-10-14 23:42:36,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:36,759 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:36,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:36,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:36,760 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 12 states. [2019-10-14 23:42:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:36,868 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2019-10-14 23:42:36,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:36,869 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2019-10-14 23:42:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:36,870 INFO L225 Difference]: With dead ends: 88 [2019-10-14 23:42:36,870 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 23:42:36,871 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 23:42:36,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 23:42:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-10-14 23:42:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 23:42:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2019-10-14 23:42:36,876 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 86 [2019-10-14 23:42:36,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:36,877 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2019-10-14 23:42:36,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2019-10-14 23:42:36,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 23:42:36,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:36,878 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 23:42:37,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:37,083 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1074942888, now seen corresponding path program 8 times [2019-10-14 23:42:37,083 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:37,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328288009] [2019-10-14 23:42:37,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,225 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 23:42:37,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328288009] [2019-10-14 23:42:37,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786407293] [2019-10-14 23:42:37,226 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 23:42:37,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:37,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:37,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:37,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:37,336 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 23:42:37,336 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:37,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 23:42:37,337 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309834492] [2019-10-14 23:42:37,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:37,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:37,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:37,339 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand 13 states. [2019-10-14 23:42:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:37,460 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2019-10-14 23:42:37,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:37,460 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2019-10-14 23:42:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:37,461 INFO L225 Difference]: With dead ends: 90 [2019-10-14 23:42:37,461 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 23:42:37,462 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 23:42:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 23:42:37,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-10-14 23:42:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:42:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-10-14 23:42:37,472 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 88 [2019-10-14 23:42:37,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:37,472 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-10-14 23:42:37,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-10-14 23:42:37,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 23:42:37,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:37,474 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 23:42:37,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:37,675 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:37,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:37,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2005830378, now seen corresponding path program 9 times [2019-10-14 23:42:37,676 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:37,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895559478] [2019-10-14 23:42:37,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:37,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:37,871 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 23:42:37,872 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895559478] [2019-10-14 23:42:37,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264701829] [2019-10-14 23:42:37,873 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 23:42:37,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:42:37,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:37,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:37,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:38,049 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 23:42:38,049 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:38,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 23:42:38,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237912912] [2019-10-14 23:42:38,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:42:38,054 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:42:38,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:38,055 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 16 states. [2019-10-14 23:42:38,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:38,226 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2019-10-14 23:42:38,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:42:38,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 90 [2019-10-14 23:42:38,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:38,227 INFO L225 Difference]: With dead ends: 95 [2019-10-14 23:42:38,228 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:42:38,228 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 23:42:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:42:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-14 23:42:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 23:42:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2019-10-14 23:42:38,239 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 90 [2019-10-14 23:42:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:38,239 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2019-10-14 23:42:38,239 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:42:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2019-10-14 23:42:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 23:42:38,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:38,243 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 23:42:38,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:38,447 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:38,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1656201482, now seen corresponding path program 10 times [2019-10-14 23:42:38,448 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:38,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268540470] [2019-10-14 23:42:38,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:38,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:38,627 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 23:42:38,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268540470] [2019-10-14 23:42:38,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616077336] [2019-10-14 23:42:38,628 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 23:42:38,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:38,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:38,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:42:38,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:38,734 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 23:42:38,734 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:38,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 23:42:38,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472975877] [2019-10-14 23:42:38,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:42:38,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:38,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:42:38,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:38,738 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 15 states. [2019-10-14 23:42:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:38,874 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2019-10-14 23:42:38,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:42:38,874 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 94 [2019-10-14 23:42:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:38,875 INFO L225 Difference]: With dead ends: 98 [2019-10-14 23:42:38,875 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 23:42:38,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:42:38,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 23:42:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-14 23:42:38,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 23:42:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-10-14 23:42:38,888 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 94 [2019-10-14 23:42:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:38,889 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-10-14 23:42:38,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:42:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-10-14 23:42:38,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:42:38,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:38,892 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 23:42:39,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:39,093 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:39,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:39,093 INFO L82 PathProgramCache]: Analyzing trace with hash 659152588, now seen corresponding path program 11 times [2019-10-14 23:42:39,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:39,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32828717] [2019-10-14 23:42:39,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:39,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:39,256 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 23:42:39,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32828717] [2019-10-14 23:42:39,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224321483] [2019-10-14 23:42:39,257 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:39,538 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-10-14 23:42:39,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:39,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:39,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:39,607 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 23:42:39,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:39,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2019-10-14 23:42:39,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004388290] [2019-10-14 23:42:39,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:39,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:39,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:39,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:39,609 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 19 states. [2019-10-14 23:42:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:39,802 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2019-10-14 23:42:39,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:42:39,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2019-10-14 23:42:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:39,804 INFO L225 Difference]: With dead ends: 107 [2019-10-14 23:42:39,804 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:42:39,805 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 23:42:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:42:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2019-10-14 23:42:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 23:42:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2019-10-14 23:42:39,810 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 96 [2019-10-14 23:42:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:39,810 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2019-10-14 23:42:39,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:39,811 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2019-10-14 23:42:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 23:42:39,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:39,812 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 23:42:40,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,017 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1708395305, now seen corresponding path program 12 times [2019-10-14 23:42:40,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:40,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775234394] [2019-10-14 23:42:40,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:40,206 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 23:42:40,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775234394] [2019-10-14 23:42:40,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626047189] [2019-10-14 23:42:40,207 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 23:42:40,385 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:42:40,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:40,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:40,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:40,478 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 23:42:40,479 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:40,479 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-14 23:42:40,479 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774173148] [2019-10-14 23:42:40,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:42:40,481 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:40,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:42:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:42:40,483 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 20 states. [2019-10-14 23:42:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:40,738 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2019-10-14 23:42:40,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:42:40,739 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 110 [2019-10-14 23:42:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:40,740 INFO L225 Difference]: With dead ends: 113 [2019-10-14 23:42:40,740 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 23:42:40,743 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 23:42:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 23:42:40,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2019-10-14 23:42:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:42:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2019-10-14 23:42:40,754 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 110 [2019-10-14 23:42:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:40,755 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2019-10-14 23:42:40,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:42:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2019-10-14 23:42:40,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 23:42:40,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:40,758 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 23:42:40,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:40,964 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash -356697015, now seen corresponding path program 13 times [2019-10-14 23:42:40,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:40,965 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719669896] [2019-10-14 23:42:40,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:40,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,174 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 23:42:41,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719669896] [2019-10-14 23:42:41,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849221540] [2019-10-14 23:42:41,175 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 23:42:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:42:41,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:41,294 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 23:42:41,299 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:41,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 23:42:41,299 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898712692] [2019-10-14 23:42:41,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:42:41,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:41,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:42:41,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:42:41,301 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 18 states. [2019-10-14 23:42:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:41,452 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2019-10-14 23:42:41,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:42:41,452 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 114 [2019-10-14 23:42:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:41,453 INFO L225 Difference]: With dead ends: 116 [2019-10-14 23:42:41,453 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 23:42:41,453 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 23:42:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 23:42:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 23:42:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:42:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2019-10-14 23:42:41,458 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 114 [2019-10-14 23:42:41,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:41,458 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2019-10-14 23:42:41,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:42:41,459 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2019-10-14 23:42:41,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 23:42:41,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:41,460 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 23:42:41,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:41,665 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:41,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1330051829, now seen corresponding path program 14 times [2019-10-14 23:42:41,666 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:41,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163834005] [2019-10-14 23:42:41,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,860 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 23:42:41,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163834005] [2019-10-14 23:42:41,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623843639] [2019-10-14 23:42:41,860 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 23:42:41,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:41,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:41,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 23:42:41,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,015 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 23:42:42,016 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:42,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 23:42:42,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597244774] [2019-10-14 23:42:42,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:42:42,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:42:42,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:42:42,018 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 19 states. [2019-10-14 23:42:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:42,133 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2019-10-14 23:42:42,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:42:42,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 116 [2019-10-14 23:42:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:42,134 INFO L225 Difference]: With dead ends: 118 [2019-10-14 23:42:42,134 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 23:42:42,135 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 23:42:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 23:42:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 23:42:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 23:42:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2019-10-14 23:42:42,139 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 116 [2019-10-14 23:42:42,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,139 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2019-10-14 23:42:42,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:42:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2019-10-14 23:42:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-14 23:42:42,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,140 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 23:42:42,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,344 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash -421157555, now seen corresponding path program 15 times [2019-10-14 23:42:42,345 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605722558] [2019-10-14 23:42:42,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,552 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 23:42:42,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605722558] [2019-10-14 23:42:42,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636908190] [2019-10-14 23:42:42,552 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 23:42:42,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-14 23:42:42,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:42,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:42,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,719 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 23:42:42,720 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:42,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-14 23:42:42,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893897299] [2019-10-14 23:42:42,721 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:42:42,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:42:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:42,722 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 24 states. [2019-10-14 23:42:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,054 INFO L93 Difference]: Finished difference Result 127 states and 149 transitions. [2019-10-14 23:42:43,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:42:43,055 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 118 [2019-10-14 23:42:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,056 INFO L225 Difference]: With dead ends: 127 [2019-10-14 23:42:43,056 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 23:42:43,057 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 23:42:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 23:42:43,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2019-10-14 23:42:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 23:42:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2019-10-14 23:42:43,063 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 118 [2019-10-14 23:42:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,064 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2019-10-14 23:42:43,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:42:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2019-10-14 23:42:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:42:43,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,067 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 23:42:43,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,271 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1792802646, now seen corresponding path program 16 times [2019-10-14 23:42:43,271 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239602464] [2019-10-14 23:42:43,272 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,272 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,540 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 23:42:43,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239602464] [2019-10-14 23:42:43,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831677674] [2019-10-14 23:42:43,541 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 23:42:43,645 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:43,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:43,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,672 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 23:42:43,673 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:43,673 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 23:42:43,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002946610] [2019-10-14 23:42:43,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:42:43,674 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:42:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:43,674 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 21 states. [2019-10-14 23:42:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,853 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2019-10-14 23:42:43,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:42:43,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 132 [2019-10-14 23:42:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,854 INFO L225 Difference]: With dead ends: 130 [2019-10-14 23:42:43,854 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 23:42:43,855 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:42:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 23:42:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-10-14 23:42:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 23:42:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2019-10-14 23:42:43,858 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 132 [2019-10-14 23:42:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,859 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2019-10-14 23:42:43,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:42:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2019-10-14 23:42:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 23:42:43,860 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,860 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 23:42:44,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,069 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash -371467028, now seen corresponding path program 17 times [2019-10-14 23:42:44,070 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:44,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749979292] [2019-10-14 23:42:44,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,070 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,360 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 23:42:44,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749979292] [2019-10-14 23:42:44,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042618915] [2019-10-14 23:42:44,360 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 23:42:45,717 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-14 23:42:45,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:45,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:45,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:45,808 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 23:42:45,808 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:45,809 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8] total 27 [2019-10-14 23:42:45,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678749728] [2019-10-14 23:42:45,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:42:45,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:42:45,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:45,810 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 27 states. [2019-10-14 23:42:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:46,205 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2019-10-14 23:42:46,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:42:46,205 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 134 [2019-10-14 23:42:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:46,207 INFO L225 Difference]: With dead ends: 139 [2019-10-14 23:42:46,207 INFO L226 Difference]: Without dead ends: 95 [2019-10-14 23:42:46,208 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 23:42:46,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-10-14 23:42:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2019-10-14 23:42:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-14 23:42:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-10-14 23:42:46,212 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 134 [2019-10-14 23:42:46,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:46,213 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-10-14 23:42:46,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:42:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-10-14 23:42:46,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 23:42:46,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:46,214 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 23:42:46,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,420 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:46,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:46,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1660813879, now seen corresponding path program 18 times [2019-10-14 23:42:46,422 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:46,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467918691] [2019-10-14 23:42:46,422 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,423 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:46,713 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 23:42:46,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467918691] [2019-10-14 23:42:46,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315331182] [2019-10-14 23:42:46,714 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 23:42:47,014 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-10-14 23:42:47,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:47,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,120 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 23:42:47,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:47,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-10-14 23:42:47,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313938695] [2019-10-14 23:42:47,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:42:47,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:42:47,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:47,123 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 27 states. [2019-10-14 23:42:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,324 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2019-10-14 23:42:47,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:42:47,330 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 148 [2019-10-14 23:42:47,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,331 INFO L225 Difference]: With dead ends: 145 [2019-10-14 23:42:47,331 INFO L226 Difference]: Without dead ends: 97 [2019-10-14 23:42:47,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:47,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-14 23:42:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-14 23:42:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 23:42:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2019-10-14 23:42:47,336 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 148 [2019-10-14 23:42:47,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:47,336 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2019-10-14 23:42:47,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:42:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2019-10-14 23:42:47,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:42:47,337 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:47,337 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 23:42:47,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,539 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:47,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:47,539 INFO L82 PathProgramCache]: Analyzing trace with hash -462803735, now seen corresponding path program 19 times [2019-10-14 23:42:47,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:47,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873589481] [2019-10-14 23:42:47,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,540 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,840 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 23:42:47,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873589481] [2019-10-14 23:42:47,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867218984] [2019-10-14 23:42:47,840 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 23:42:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:48,000 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 23:42:48,001 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:48,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 23:42:48,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062130736] [2019-10-14 23:42:48,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:42:48,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:42:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:42:48,003 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 24 states. [2019-10-14 23:42:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:48,154 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2019-10-14 23:42:48,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:42:48,157 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 152 [2019-10-14 23:42:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:48,158 INFO L225 Difference]: With dead ends: 148 [2019-10-14 23:42:48,158 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 23:42:48,159 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 23:42:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 23:42:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 23:42:48,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 23:42:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2019-10-14 23:42:48,168 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 152 [2019-10-14 23:42:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:48,168 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2019-10-14 23:42:48,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:42:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2019-10-14 23:42:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 23:42:48,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:48,169 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 23:42:48,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,379 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1779127339, now seen corresponding path program 20 times [2019-10-14 23:42:48,380 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:48,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933947292] [2019-10-14 23:42:48,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:48,705 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 23:42:48,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933947292] [2019-10-14 23:42:48,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126093164] [2019-10-14 23:42:48,706 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 23:42:48,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:48,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:48,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 23:42:48,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:48,837 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 23:42:48,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:48,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 23:42:48,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465762210] [2019-10-14 23:42:48,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:42:48,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:48,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:42:48,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:42:48,839 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 25 states. [2019-10-14 23:42:49,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:49,062 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2019-10-14 23:42:49,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:42:49,063 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 154 [2019-10-14 23:42:49,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:49,064 INFO L225 Difference]: With dead ends: 150 [2019-10-14 23:42:49,064 INFO L226 Difference]: Without dead ends: 100 [2019-10-14 23:42:49,065 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 23:42:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-14 23:42:49,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-10-14 23:42:49,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 23:42:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2019-10-14 23:42:49,070 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 154 [2019-10-14 23:42:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:49,071 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2019-10-14 23:42:49,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:42:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2019-10-14 23:42:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-14 23:42:49,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:49,072 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 23:42:49,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:49,276 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash 201306861, now seen corresponding path program 21 times [2019-10-14 23:42:49,277 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:49,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197719521] [2019-10-14 23:42:49,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,278 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:49,587 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 23:42:49,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197719521] [2019-10-14 23:42:49,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937833582] [2019-10-14 23:42:49,588 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:42:49,731 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-10-14 23:42:49,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:49,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:49,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:49,842 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 23:42:49,842 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:49,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2019-10-14 23:42:49,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091215217] [2019-10-14 23:42:49,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:42:49,843 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:49,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:42:49,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:42:49,844 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 31 states. [2019-10-14 23:42:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:50,134 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2019-10-14 23:42:50,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:42:50,135 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 156 [2019-10-14 23:42:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:50,136 INFO L225 Difference]: With dead ends: 155 [2019-10-14 23:42:50,136 INFO L226 Difference]: Without dead ends: 105 [2019-10-14 23:42:50,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:42:50,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-14 23:42:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2019-10-14 23:42:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-14 23:42:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2019-10-14 23:42:50,143 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 156 [2019-10-14 23:42:50,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:50,143 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2019-10-14 23:42:50,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:42:50,143 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2019-10-14 23:42:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:42:50,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:50,144 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 23:42:50,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:50,347 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1557379315, now seen corresponding path program 22 times [2019-10-14 23:42:50,348 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:50,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599543033] [2019-10-14 23:42:50,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:50,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:50,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:50,729 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 23:42:50,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599543033] [2019-10-14 23:42:50,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743982244] [2019-10-14 23:42:50,730 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 23:42:50,840 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:50,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:50,843 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 23:42:50,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:50,876 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 23:42:50,876 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:50,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 23:42:50,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840047112] [2019-10-14 23:42:50,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:42:50,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:50,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:42:50,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:50,878 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand 27 states. [2019-10-14 23:42:51,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:51,135 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2019-10-14 23:42:51,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:42:51,136 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 160 [2019-10-14 23:42:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:51,137 INFO L225 Difference]: With dead ends: 158 [2019-10-14 23:42:51,137 INFO L226 Difference]: Without dead ends: 106 [2019-10-14 23:42:51,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:42:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-10-14 23:42:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-10-14 23:42:51,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 23:42:51,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2019-10-14 23:42:51,143 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 160 [2019-10-14 23:42:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:51,143 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2019-10-14 23:42:51,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:42:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2019-10-14 23:42:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 23:42:51,144 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:51,144 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 23:42:51,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:51,349 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:51,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:51,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1638200241, now seen corresponding path program 23 times [2019-10-14 23:42:51,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:51,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826834123] [2019-10-14 23:42:51,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:51,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:51,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:51,752 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 23:42:51,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826834123] [2019-10-14 23:42:51,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670171610] [2019-10-14 23:42:51,753 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 23:42:53,304 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-14 23:42:53,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:53,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:53,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:53,438 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 23:42:53,439 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:53,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9] total 34 [2019-10-14 23:42:53,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350765649] [2019-10-14 23:42:53,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:42:53,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:53,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:42:53,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=760, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:42:53,441 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 34 states. [2019-10-14 23:42:53,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:53,981 INFO L93 Difference]: Finished difference Result 167 states and 193 transitions. [2019-10-14 23:42:53,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:42:53,981 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2019-10-14 23:42:53,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:53,982 INFO L225 Difference]: With dead ends: 167 [2019-10-14 23:42:53,983 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 23:42:53,984 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=432, Invalid=1208, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:42:53,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 23:42:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2019-10-14 23:42:53,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-14 23:42:53,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2019-10-14 23:42:53,990 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 162 [2019-10-14 23:42:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:53,990 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2019-10-14 23:42:53,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:42:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2019-10-14 23:42:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-14 23:42:53,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:53,992 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 23:42:54,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:54,198 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1915017812, now seen corresponding path program 24 times [2019-10-14 23:42:54,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:54,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077345149] [2019-10-14 23:42:54,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:54,677 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 23:42:54,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077345149] [2019-10-14 23:42:54,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987342351] [2019-10-14 23:42:54,678 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 23:42:55,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-10-14 23:42:55,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:55,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:55,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:55,498 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 23:42:55,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:55,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2019-10-14 23:42:55,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205719039] [2019-10-14 23:42:55,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 23:42:55,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:55,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 23:42:55,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:42:55,500 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand 35 states. [2019-10-14 23:42:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:55,863 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2019-10-14 23:42:55,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 23:42:55,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 176 [2019-10-14 23:42:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:55,865 INFO L225 Difference]: With dead ends: 173 [2019-10-14 23:42:55,865 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 23:42:55,866 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 23:42:55,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 23:42:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2019-10-14 23:42:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-10-14 23:42:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2019-10-14 23:42:55,872 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 176 [2019-10-14 23:42:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:55,872 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2019-10-14 23:42:55,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 23:42:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2019-10-14 23:42:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-14 23:42:55,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:55,874 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 23:42:56,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:56,079 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash -664873780, now seen corresponding path program 25 times [2019-10-14 23:42:56,079 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:56,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693361250] [2019-10-14 23:42:56,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,080 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:56,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,674 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 23:42:56,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693361250] [2019-10-14 23:42:56,675 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306562454] [2019-10-14 23:42:56,675 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 23:42:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:56,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:42:56,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:56,822 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 23:42:56,822 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:56,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 23:42:56,822 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169069766] [2019-10-14 23:42:56,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:42:56,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:56,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:42:56,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:42:56,824 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand 30 states. [2019-10-14 23:42:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:57,101 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2019-10-14 23:42:57,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:42:57,102 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 180 [2019-10-14 23:42:57,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:57,103 INFO L225 Difference]: With dead ends: 176 [2019-10-14 23:42:57,103 INFO L226 Difference]: Without dead ends: 118 [2019-10-14 23:42:57,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:42:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-14 23:42:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-10-14 23:42:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 23:42:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2019-10-14 23:42:57,109 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 180 [2019-10-14 23:42:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:57,109 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2019-10-14 23:42:57,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:42:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2019-10-14 23:42:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 23:42:57,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:57,111 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 23:42:57,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:57,311 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:57,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:57,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1692951822, now seen corresponding path program 26 times [2019-10-14 23:42:57,312 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:57,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302689004] [2019-10-14 23:42:57,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:57,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:57,774 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 23:42:57,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302689004] [2019-10-14 23:42:57,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404764114] [2019-10-14 23:42:57,775 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 23:42:57,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:57,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:57,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 23:42:57,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:57,950 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 23:42:57,951 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:57,951 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 23:42:57,951 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385931606] [2019-10-14 23:42:57,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:42:57,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:42:57,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:42:57,952 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand 31 states. [2019-10-14 23:42:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:58,211 INFO L93 Difference]: Finished difference Result 178 states and 200 transitions. [2019-10-14 23:42:58,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:42:58,211 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 182 [2019-10-14 23:42:58,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:58,212 INFO L225 Difference]: With dead ends: 178 [2019-10-14 23:42:58,213 INFO L226 Difference]: Without dead ends: 120 [2019-10-14 23:42:58,213 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:42:58,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-14 23:42:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-10-14 23:42:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-14 23:42:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2019-10-14 23:42:58,218 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 182 [2019-10-14 23:42:58,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:58,219 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2019-10-14 23:42:58,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:42:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2019-10-14 23:42:58,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 23:42:58,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:58,220 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 23:42:58,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:58,425 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:58,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:58,426 INFO L82 PathProgramCache]: Analyzing trace with hash -179376944, now seen corresponding path program 27 times [2019-10-14 23:42:58,426 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:58,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126082042] [2019-10-14 23:42:58,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:58,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:58,933 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 23:42:58,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126082042] [2019-10-14 23:42:58,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564385468] [2019-10-14 23:42:58,934 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 23:42:59,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 23:42:59,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:59,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:59,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:59,320 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 23:42:59,320 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:59,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2019-10-14 23:42:59,320 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844661275] [2019-10-14 23:42:59,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 23:42:59,321 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 23:42:59,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1001, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:42:59,322 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 39 states. [2019-10-14 23:42:59,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:59,896 INFO L93 Difference]: Finished difference Result 187 states and 215 transitions. [2019-10-14 23:42:59,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 23:42:59,897 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 184 [2019-10-14 23:42:59,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:59,898 INFO L225 Difference]: With dead ends: 187 [2019-10-14 23:42:59,898 INFO L226 Difference]: Without dead ends: 129 [2019-10-14 23:42:59,899 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 23:42:59,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-10-14 23:42:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2019-10-14 23:42:59,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 23:42:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2019-10-14 23:42:59,905 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 184 [2019-10-14 23:42:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:59,905 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2019-10-14 23:42:59,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 23:42:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2019-10-14 23:42:59,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-14 23:42:59,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:59,907 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 23:43:00,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:00,111 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1322478291, now seen corresponding path program 28 times [2019-10-14 23:43:00,113 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:00,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106875602] [2019-10-14 23:43:00,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:00,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:00,715 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 23:43:00,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106875602] [2019-10-14 23:43:00,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668050211] [2019-10-14 23:43:00,718 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 23:43:00,908 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:43:00,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:43:00,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 23:43:00,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:01,008 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 23:43:01,008 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:01,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 23:43:01,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598976642] [2019-10-14 23:43:01,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:43:01,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:01,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:43:01,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:43:01,012 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 33 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 190 states and 214 transitions. [2019-10-14 23:43:01,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:43:01,395 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 198 [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: 190 [2019-10-14 23:43:01,396 INFO L226 Difference]: Without dead ends: 128 [2019-10-14 23:43:01,397 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 23:43:01,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-14 23:43:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-10-14 23:43:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-14 23:43:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2019-10-14 23:43:01,402 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 198 [2019-10-14 23:43:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:01,402 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2019-10-14 23:43:01,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:43:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2019-10-14 23:43:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [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 [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 23:43:01,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:01,609 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:01,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:01,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1784633583, now seen corresponding path program 29 times [2019-10-14 23:43:01,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:01,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158706376] [2019-10-14 23:43:01,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:01,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:01,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:02,188 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 23:43:02,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158706376] [2019-10-14 23:43:02,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274086293] [2019-10-14 23:43:02,189 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