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/sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:43:12,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:43:12,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:43:12,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:43:12,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:43:12,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:43:12,547 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:43:12,548 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:43:12,550 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:43:12,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:43:12,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:43:12,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:43:12,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:43:12,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:43:12,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:43:12,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:43:12,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:43:12,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:43:12,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:43:12,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:43:12,567 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:43:12,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:43:12,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:43:12,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:43:12,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:43:12,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:43:12,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:43:12,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:43:12,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:43:12,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:43:12,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:43:12,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:43:12,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:43:12,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:43:12,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:43:12,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:43:12,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:43:12,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:43:12,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:43:12,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:43:12,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:43:12,596 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 23:43:12,619 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:43:12,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:43:12,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:43:12,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:43:12,622 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:43:12,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:43:12,623 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:43:12,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:43:12,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:43:12,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:43:12,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:43:12,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:43:12,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:43:12,626 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:43:12,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:43:12,626 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:43:12,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:43:12,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:43:12,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:43:12,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:43:12,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:43:12,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:43:12,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:43:12,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:43:12,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:43:12,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:43:12,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:43:12,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:43:12,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:43:12,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:43:12,949 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:43:12,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:43:12,955 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:43:12,956 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:43:12,956 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum.i [2019-10-14 23:43:13,048 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/336cc5ef8/0efd6c74c6ba40d993fa3cbb3864c30f/FLAGeebd10adc [2019-10-14 23:43:13,537 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:43:13,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum.i [2019-10-14 23:43:13,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/336cc5ef8/0efd6c74c6ba40d993fa3cbb3864c30f/FLAGeebd10adc [2019-10-14 23:43:13,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/336cc5ef8/0efd6c74c6ba40d993fa3cbb3864c30f [2019-10-14 23:43:13,896 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:43:13,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:43:13,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:13,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:43:13,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:43:13,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:13" (1/1) ... [2019-10-14 23:43:13,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622f962b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:13, skipping insertion in model container [2019-10-14 23:43:13,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:43:13" (1/1) ... [2019-10-14 23:43:13,913 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:43:13,934 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:43:14,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:14,117 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:43:14,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:43:14,159 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:43:14,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14 WrapperNode [2019-10-14 23:43:14,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:43:14,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:43:14,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:43:14,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:43:14,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14" (1/1) ... [2019-10-14 23:43:14,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14" (1/1) ... [2019-10-14 23:43:14,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14" (1/1) ... [2019-10-14 23:43:14,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14" (1/1) ... [2019-10-14 23:43:14,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14" (1/1) ... [2019-10-14 23:43:14,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14" (1/1) ... [2019-10-14 23:43:14,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14" (1/1) ... [2019-10-14 23:43:14,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:43:14,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:43:14,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:43:14,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:43:14,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14" (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 23:43:14,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:43:14,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:43:14,360 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-10-14 23:43:14,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:43:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:43:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:43:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-10-14 23:43:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:43:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:43:14,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:43:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:43:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:43:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:43:14,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:43:14,689 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:43:14,690 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:43:14,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:14 BoogieIcfgContainer [2019-10-14 23:43:14,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:43:14,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:43:14,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:43:14,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:43:14,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:43:13" (1/3) ... [2019-10-14 23:43:14,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b407a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:14, skipping insertion in model container [2019-10-14 23:43:14,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:43:14" (2/3) ... [2019-10-14 23:43:14,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b407a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:43:14, skipping insertion in model container [2019-10-14 23:43:14,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:43:14" (3/3) ... [2019-10-14 23:43:14,702 INFO L109 eAbstractionObserver]: Analyzing ICFG sum.i [2019-10-14 23:43:14,710 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:43:14,715 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:43:14,724 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:43:14,750 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:43:14,750 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:43:14,750 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:43:14,751 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:43:14,751 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:43:14,751 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:43:14,751 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:43:14,751 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:43:14,773 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 23:43:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:43:14,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:14,782 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 23:43:14,784 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:14,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:14,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1754504496, now seen corresponding path program 1 times [2019-10-14 23:43:14,802 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:14,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020268208] [2019-10-14 23:43:14,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:14,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,021 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 23:43:15,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020268208] [2019-10-14 23:43:15,023 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:15,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:43:15,024 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235614044] [2019-10-14 23:43:15,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:43:15,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:15,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:43:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:43:15,048 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 23:43:15,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:15,193 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2019-10-14 23:43:15,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:43:15,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-14 23:43:15,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:15,211 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:43:15,211 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:43:15,218 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 23:43:15,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:43:15,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 23:43:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:43:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 23:43:15,276 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 32 [2019-10-14 23:43:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:15,277 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 23:43:15,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:43:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 23:43:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:43:15,280 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:15,282 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 23:43:15,282 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:15,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:15,284 INFO L82 PathProgramCache]: Analyzing trace with hash 614035178, now seen corresponding path program 1 times [2019-10-14 23:43:15,284 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:15,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498041416] [2019-10-14 23:43:15,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:43:15,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498041416] [2019-10-14 23:43:15,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698048334] [2019-10-14 23:43:15,522 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 23:43:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:15,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:43:15,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:43:15,679 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:43:15,679 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2019-10-14 23:43:15,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485908398] [2019-10-14 23:43:15,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:43:15,682 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:43:15,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:15,683 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2019-10-14 23:43:15,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:15,740 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-10-14 23:43:15,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:43:15,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 23:43:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:15,743 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:43:15,743 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:43:15,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:43:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:43:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-14 23:43:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:43:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-10-14 23:43:15,765 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 32 [2019-10-14 23:43:15,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:15,766 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-10-14 23:43:15,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:43:15,766 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-10-14 23:43:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:43:15,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:15,769 INFO L380 BasicCegarLoop]: trace histogram [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 23:43:15,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:15,974 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:15,975 INFO L82 PathProgramCache]: Analyzing trace with hash 435243016, now seen corresponding path program 1 times [2019-10-14 23:43:15,976 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:15,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414831432] [2019-10-14 23:43:15,976 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:15,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-14 23:43:16,167 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414831432] [2019-10-14 23:43:16,167 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:43:16,167 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:43:16,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603771623] [2019-10-14 23:43:16,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:43:16,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:16,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:43:16,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:43:16,169 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2019-10-14 23:43:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:16,292 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2019-10-14 23:43:16,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:43:16,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-10-14 23:43:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:16,294 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:43:16,294 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:43:16,295 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 23:43:16,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:43:16,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-14 23:43:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:43:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-10-14 23:43:16,302 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 38 [2019-10-14 23:43:16,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:16,305 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-10-14 23:43:16,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:43:16,305 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-10-14 23:43:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:43:16,306 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:16,306 INFO L380 BasicCegarLoop]: trace histogram [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 23:43:16,307 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash 573397766, now seen corresponding path program 1 times [2019-10-14 23:43:16,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:16,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385476681] [2019-10-14 23:43:16,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:16,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:43:16,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385476681] [2019-10-14 23:43:16,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782662781] [2019-10-14 23:43:16,463 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 23:43:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:16,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:43:16,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:43:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-14 23:43:16,568 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:43:16,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2019-10-14 23:43:16,569 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608577777] [2019-10-14 23:43:16,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:43:16,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:43:16,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:43:16,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:43:16,571 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2019-10-14 23:43:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:43:16,793 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-10-14 23:43:16,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:43:16,793 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2019-10-14 23:43:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:43:16,794 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:43:16,795 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:43:16,795 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:43:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:43:16,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 23:43:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:43:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-14 23:43:16,803 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 40 [2019-10-14 23:43:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:43:16,803 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-14 23:43:16,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:43:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-14 23:43:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:43:16,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:43:16,805 INFO L380 BasicCegarLoop]: trace histogram [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 23:43:17,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:43:17,011 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:43:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:43:17,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2051797468, now seen corresponding path program 2 times [2019-10-14 23:43:17,012 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:43:17,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287148361] [2019-10-14 23:43:17,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:43:17,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:43:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:18,040 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 33 [2019-10-14 23:43:18,405 WARN L191 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 33 [2019-10-14 23:43:18,909 WARN L191 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2019-10-14 23:43:33,583 WARN L191 SmtUtils]: Spent 14.64 s on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2019-10-14 23:43:33,982 WARN L191 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 45 [2019-10-14 23:43:36,416 WARN L191 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2019-10-14 23:43:36,698 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2019-10-14 23:43:38,315 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2019-10-14 23:43:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:43:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat