java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:04,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:04,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:04,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:04,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:04,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:04,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:04,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:04,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:04,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:04,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:04,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:04,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:04,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:04,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:04,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:04,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:04,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:04,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:04,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:04,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:04,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:04,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:04,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:04,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:04,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:04,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:04,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:04,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:04,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:04,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:04,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:04,559 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:04,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:04,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:04,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:04,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:45:04,587 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:04,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:04,590 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:04,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:04,591 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:04,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:04,591 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:04,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:04,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:04,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:04,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:04,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:04,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:04,594 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:04,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:04,594 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:04,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:04,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:04,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:04,595 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:04,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:04,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:04,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:04,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:04,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:04,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:04,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:04,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:04,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:04,869 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:04,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:04,897 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:04,899 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:04,899 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:04,900 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-10-14 21:45:04,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdae67f37/3646c8fde2514a77a15c627b8189b431/FLAGf9321bc2b [2019-10-14 21:45:05,455 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:05,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2019-10-14 21:45:05,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdae67f37/3646c8fde2514a77a15c627b8189b431/FLAGf9321bc2b [2019-10-14 21:45:05,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdae67f37/3646c8fde2514a77a15c627b8189b431 [2019-10-14 21:45:05,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:05,835 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:05,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:05,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:05,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:05,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:05" (1/1) ... [2019-10-14 21:45:05,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74c645f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:05, skipping insertion in model container [2019-10-14 21:45:05,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:05" (1/1) ... [2019-10-14 21:45:05,852 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:05,873 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:06,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:06,080 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:06,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:06,204 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:06,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06 WrapperNode [2019-10-14 21:45:06,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:06,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:06,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:06,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:06,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... [2019-10-14 21:45:06,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:06,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:06,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:06,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:06,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:06,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:06,295 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:06,589 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:06,590 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:45:06,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:06 BoogieIcfgContainer [2019-10-14 21:45:06,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:06,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:06,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:06,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:06,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:05" (1/3) ... [2019-10-14 21:45:06,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa46416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:06, skipping insertion in model container [2019-10-14 21:45:06,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:06" (2/3) ... [2019-10-14 21:45:06,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa46416 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:06, skipping insertion in model container [2019-10-14 21:45:06,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:06" (3/3) ... [2019-10-14 21:45:06,599 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2019-10-14 21:45:06,606 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:06,612 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:06,623 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:06,643 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:06,643 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:06,643 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:06,643 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:06,644 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:06,644 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:06,644 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:06,644 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:06,659 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:45:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:45:06,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:06,665 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:06,667 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:06,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:06,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1721973062, now seen corresponding path program 1 times [2019-10-14 21:45:06,678 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:06,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053327514] [2019-10-14 21:45:06,678 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:06,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:06,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:06,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:06,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053327514] [2019-10-14 21:45:06,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:06,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:06,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058007584] [2019-10-14 21:45:06,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:06,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:06,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:06,869 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:45:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:06,990 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2019-10-14 21:45:06,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:06,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-14 21:45:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:07,000 INFO L225 Difference]: With dead ends: 55 [2019-10-14 21:45:07,000 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:45:07,004 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:07,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:45:07,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:45:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:45:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 21:45:07,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2019-10-14 21:45:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:07,046 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 21:45:07,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:07,046 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 21:45:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:45:07,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:07,047 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:07,048 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:07,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash -13266878, now seen corresponding path program 1 times [2019-10-14 21:45:07,049 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:07,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165080072] [2019-10-14 21:45:07,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:07,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165080072] [2019-10-14 21:45:07,127 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:07,127 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:07,128 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054190916] [2019-10-14 21:45:07,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:07,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:07,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:07,135 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-14 21:45:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:07,263 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-10-14 21:45:07,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:07,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:45:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:07,265 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:45:07,265 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:45:07,266 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:45:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 21:45:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:45:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-14 21:45:07,275 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 21 [2019-10-14 21:45:07,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:07,276 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-14 21:45:07,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-14 21:45:07,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 21:45:07,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:07,277 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:07,278 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:07,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:07,278 INFO L82 PathProgramCache]: Analyzing trace with hash -927642988, now seen corresponding path program 1 times [2019-10-14 21:45:07,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:07,279 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834416361] [2019-10-14 21:45:07,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:45:07,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834416361] [2019-10-14 21:45:07,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099418978] [2019-10-14 21:45:07,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:07,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:45:07,525 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:07,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:07,525 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311694347] [2019-10-14 21:45:07,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:07,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:07,527 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2019-10-14 21:45:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:07,654 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-10-14 21:45:07,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:07,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-14 21:45:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:07,656 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:45:07,656 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:45:07,657 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:45:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 21:45:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 21:45:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-14 21:45:07,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2019-10-14 21:45:07,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:07,666 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-14 21:45:07,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-14 21:45:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:45:07,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:07,667 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:07,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:07,872 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash -681366654, now seen corresponding path program 2 times [2019-10-14 21:45:07,873 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:07,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005009365] [2019-10-14 21:45:07,874 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:07,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:07,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005009365] [2019-10-14 21:45:07,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464522078] [2019-10-14 21:45:07,988 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:08,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:08,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:08,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:08,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:08,059 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:08,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:08,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107286111] [2019-10-14 21:45:08,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:08,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:08,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:08,061 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2019-10-14 21:45:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:08,193 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-10-14 21:45:08,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:08,194 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-10-14 21:45:08,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:08,195 INFO L225 Difference]: With dead ends: 68 [2019-10-14 21:45:08,195 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:45:08,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:08,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:45:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 21:45:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:45:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-14 21:45:08,206 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 31 [2019-10-14 21:45:08,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:08,206 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-14 21:45:08,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:08,209 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-14 21:45:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:45:08,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:08,210 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:45:08,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:08,415 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:08,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1000479276, now seen corresponding path program 3 times [2019-10-14 21:45:08,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:08,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212881339] [2019-10-14 21:45:08,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:08,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:08,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212881339] [2019-10-14 21:45:08,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46476775] [2019-10-14 21:45:08,535 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:08,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:08,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:08,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:45:08,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:45:08,628 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:08,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:45:08,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128214378] [2019-10-14 21:45:08,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:45:08,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:08,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:45:08,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:08,630 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 8 states. [2019-10-14 21:45:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:08,775 INFO L93 Difference]: Finished difference Result 77 states and 91 transitions. [2019-10-14 21:45:08,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:45:08,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2019-10-14 21:45:08,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:08,777 INFO L225 Difference]: With dead ends: 77 [2019-10-14 21:45:08,777 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:45:08,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:45:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:45:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 21:45:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:45:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-10-14 21:45:08,786 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 36 [2019-10-14 21:45:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:08,786 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-10-14 21:45:08,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:45:08,786 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-10-14 21:45:08,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:45:08,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:08,788 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:09,004 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:09,004 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:09,005 INFO L82 PathProgramCache]: Analyzing trace with hash 631314114, now seen corresponding path program 4 times [2019-10-14 21:45:09,005 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:09,005 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084723613] [2019-10-14 21:45:09,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:45:09,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084723613] [2019-10-14 21:45:09,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748939171] [2019-10-14 21:45:09,170 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:09,223 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:09,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:09,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:09,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:45:09,249 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:09,249 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:09,249 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930923551] [2019-10-14 21:45:09,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:09,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:09,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:09,251 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 9 states. [2019-10-14 21:45:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:09,423 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-10-14 21:45:09,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:09,423 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-10-14 21:45:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:09,424 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:45:09,425 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:45:09,425 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:45:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 21:45:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:45:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-10-14 21:45:09,433 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 41 [2019-10-14 21:45:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:09,434 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-10-14 21:45:09,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-10-14 21:45:09,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:45:09,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:09,436 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:09,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:09,641 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1809092332, now seen corresponding path program 5 times [2019-10-14 21:45:09,642 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:09,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409973932] [2019-10-14 21:45:09,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:09,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:45:09,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409973932] [2019-10-14 21:45:09,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838721765] [2019-10-14 21:45:09,802 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:10,254 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:45:10,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:10,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:45:10,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:45:10,284 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:10,284 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:45:10,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667525978] [2019-10-14 21:45:10,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:45:10,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:10,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:45:10,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:10,286 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 10 states. [2019-10-14 21:45:10,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:10,411 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2019-10-14 21:45:10,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:45:10,412 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2019-10-14 21:45:10,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:10,413 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:45:10,414 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:45:10,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:45:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:45:10,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-14 21:45:10,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:45:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2019-10-14 21:45:10,429 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 46 [2019-10-14 21:45:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:10,429 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2019-10-14 21:45:10,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:45:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2019-10-14 21:45:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:45:10,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:10,431 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:10,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:10,635 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:10,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:10,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2091864578, now seen corresponding path program 6 times [2019-10-14 21:45:10,636 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:10,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927792727] [2019-10-14 21:45:10,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:10,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:10,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:45:10,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927792727] [2019-10-14 21:45:10,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115436956] [2019-10-14 21:45:10,758 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:11,205 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:45:11,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:11,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:45:11,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 21:45:11,229 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:11,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:45:11,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818411622] [2019-10-14 21:45:11,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:45:11,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:45:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:11,231 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand 11 states. [2019-10-14 21:45:11,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:11,394 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2019-10-14 21:45:11,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:45:11,395 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-10-14 21:45:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:11,396 INFO L225 Difference]: With dead ends: 104 [2019-10-14 21:45:11,396 INFO L226 Difference]: Without dead ends: 61 [2019-10-14 21:45:11,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:45:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-14 21:45:11,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-10-14 21:45:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:45:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2019-10-14 21:45:11,413 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 51 [2019-10-14 21:45:11,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:11,418 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2019-10-14 21:45:11,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:45:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2019-10-14 21:45:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:45:11,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:11,420 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:11,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:11,626 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:11,627 INFO L82 PathProgramCache]: Analyzing trace with hash -591532972, now seen corresponding path program 7 times [2019-10-14 21:45:11,627 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:11,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366935665] [2019-10-14 21:45:11,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:11,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:45:11,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366935665] [2019-10-14 21:45:11,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954255000] [2019-10-14 21:45:11,743 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:11,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:45:11,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:11,839 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-14 21:45:11,840 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:11,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:45:11,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241042845] [2019-10-14 21:45:11,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:45:11,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:11,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:45:11,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:11,841 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 12 states. [2019-10-14 21:45:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,012 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2019-10-14 21:45:12,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:45:12,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2019-10-14 21:45:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,014 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:45:12,015 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:45:12,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:45:12,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:45:12,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-10-14 21:45:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:45:12,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2019-10-14 21:45:12,024 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 56 [2019-10-14 21:45:12,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,024 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2019-10-14 21:45:12,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:45:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2019-10-14 21:45:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:45:12,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,026 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:12,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:12,230 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,230 INFO L82 PathProgramCache]: Analyzing trace with hash 642637122, now seen corresponding path program 8 times [2019-10-14 21:45:12,231 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677590297] [2019-10-14 21:45:12,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:45:12,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677590297] [2019-10-14 21:45:12,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803880058] [2019-10-14 21:45:12,355 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:12,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:12,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:12,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:45:12,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-14 21:45:12,456 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:12,456 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:45:12,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706678069] [2019-10-14 21:45:12,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:45:12,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:45:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:12,457 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 13 states. [2019-10-14 21:45:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:12,641 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-10-14 21:45:12,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:45:12,641 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-10-14 21:45:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:12,642 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:45:12,642 INFO L226 Difference]: Without dead ends: 71 [2019-10-14 21:45:12,643 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:45:12,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-14 21:45:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-10-14 21:45:12,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:45:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2019-10-14 21:45:12,651 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 61 [2019-10-14 21:45:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:12,652 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2019-10-14 21:45:12,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:45:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2019-10-14 21:45:12,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:45:12,653 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:12,653 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:12,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:12,857 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:12,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1682614380, now seen corresponding path program 9 times [2019-10-14 21:45:12,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:12,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513763832] [2019-10-14 21:45:12,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:12,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:45:13,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513763832] [2019-10-14 21:45:13,003 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252341761] [2019-10-14 21:45:13,004 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:16,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:45:16,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:16,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:45:16,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:45:16,352 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:16,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:45:16,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118388630] [2019-10-14 21:45:16,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:45:16,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:16,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:45:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:16,354 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 14 states. [2019-10-14 21:45:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:16,535 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2019-10-14 21:45:16,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:45:16,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:45:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:16,536 INFO L225 Difference]: With dead ends: 131 [2019-10-14 21:45:16,536 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:45:16,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:45:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:45:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-10-14 21:45:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-10-14 21:45:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2019-10-14 21:45:16,545 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 66 [2019-10-14 21:45:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:16,546 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2019-10-14 21:45:16,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:45:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2019-10-14 21:45:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 21:45:16,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:16,548 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:16,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:16,758 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:16,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:16,759 INFO L82 PathProgramCache]: Analyzing trace with hash 591181954, now seen corresponding path program 10 times [2019-10-14 21:45:16,759 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:16,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128253395] [2019-10-14 21:45:16,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:16,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:16,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-14 21:45:16,907 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128253395] [2019-10-14 21:45:16,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119002311] [2019-10-14 21:45:16,908 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:16,973 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:45:16,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:16,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:45:16,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-14 21:45:17,016 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:17,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:45:17,017 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653027449] [2019-10-14 21:45:17,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:17,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:17,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:17,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:17,018 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 15 states. [2019-10-14 21:45:17,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:17,243 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2019-10-14 21:45:17,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:45:17,244 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2019-10-14 21:45:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:17,244 INFO L225 Difference]: With dead ends: 140 [2019-10-14 21:45:17,244 INFO L226 Difference]: Without dead ends: 81 [2019-10-14 21:45:17,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-10-14 21:45:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-10-14 21:45:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 21:45:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2019-10-14 21:45:17,253 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2019-10-14 21:45:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:17,254 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2019-10-14 21:45:17,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2019-10-14 21:45:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:45:17,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:17,255 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:17,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:17,462 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:17,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:17,462 INFO L82 PathProgramCache]: Analyzing trace with hash 665957076, now seen corresponding path program 11 times [2019-10-14 21:45:17,463 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:17,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662089415] [2019-10-14 21:45:17,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:17,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:17,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2019-10-14 21:45:17,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662089415] [2019-10-14 21:45:17,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261470980] [2019-10-14 21:45:17,684 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true