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_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:46:56,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:46:56,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:46:56,510 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:46:56,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:46:56,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:46:56,516 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:46:56,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:46:56,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:46:56,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:46:56,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:46:56,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:46:56,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:46:56,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:46:56,532 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:46:56,533 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:46:56,534 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:46:56,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:46:56,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:46:56,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:46:56,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:46:56,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:46:56,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:46:56,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:46:56,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:46:56,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:46:56,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:46:56,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:46:56,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:46:56,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:46:56,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:46:56,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:46:56,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:46:56,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:46:56,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:46:56,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:46:56,554 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 21:46:56,567 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:46:56,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:46:56,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:46:56,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:46:56,569 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:46:56,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:46:56,570 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:46:56,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:46:56,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:46:56,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:46:56,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:46:56,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:46:56,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:46:56,571 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:46:56,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:46:56,571 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:46:56,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:46:56,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:46:56,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:46:56,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:46:56,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:46:56,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:46:56,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:46:56,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:46:56,573 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:46:56,573 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:46:56,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:46:56,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:46:56,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:46:56,866 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:46:56,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:46:56,883 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:46:56,885 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:46:56,885 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:46:56,886 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-10-14 21:46:56,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d05b3dd/ca2fb653468c4f3fb52f7ddc9e215beb/FLAG89d136ad3 [2019-10-14 21:46:57,417 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:46:57,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-10-14 21:46:57,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d05b3dd/ca2fb653468c4f3fb52f7ddc9e215beb/FLAG89d136ad3 [2019-10-14 21:46:57,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2d05b3dd/ca2fb653468c4f3fb52f7ddc9e215beb [2019-10-14 21:46:57,795 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:46:57,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:46:57,798 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:57,798 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:46:57,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:46:57,803 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:57" (1/1) ... [2019-10-14 21:46:57,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65982a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:57, skipping insertion in model container [2019-10-14 21:46:57,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:57" (1/1) ... [2019-10-14 21:46:57,814 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:46:57,834 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:46:58,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:58,075 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:46:58,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:46:58,113 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:46:58,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58 WrapperNode [2019-10-14 21:46:58,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:46:58,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:46:58,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:46:58,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:46:58,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58" (1/1) ... [2019-10-14 21:46:58,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58" (1/1) ... [2019-10-14 21:46:58,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58" (1/1) ... [2019-10-14 21:46:58,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58" (1/1) ... [2019-10-14 21:46:58,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58" (1/1) ... [2019-10-14 21:46:58,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58" (1/1) ... [2019-10-14 21:46:58,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58" (1/1) ... [2019-10-14 21:46:58,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:46:58,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:46:58,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:46:58,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:46:58,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58" (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 21:46:58,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:46:58,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:46:58,282 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:46:58,282 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:46:58,282 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:46:58,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:46:58,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:46:58,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:46:58,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:46:58,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:46:58,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:46:58,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:46:58,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:46:58,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:46:58,509 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:46:58,509 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:46:58,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:58 BoogieIcfgContainer [2019-10-14 21:46:58,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:46:58,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:46:58,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:46:58,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:46:58,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:57" (1/3) ... [2019-10-14 21:46:58,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b7de91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:58, skipping insertion in model container [2019-10-14 21:46:58,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:58" (2/3) ... [2019-10-14 21:46:58,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b7de91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:58, skipping insertion in model container [2019-10-14 21:46:58,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:58" (3/3) ... [2019-10-14 21:46:58,519 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2019-10-14 21:46:58,535 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:46:58,545 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:46:58,575 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:46:58,619 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:46:58,619 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:46:58,619 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:46:58,619 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:46:58,620 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:46:58,620 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:46:58,620 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:46:58,620 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:46:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-14 21:46:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:58,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,650 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,652 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-10-14 21:46:58,668 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923503946] [2019-10-14 21:46:58,669 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,669 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:58,832 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 21:46:58,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923503946] [2019-10-14 21:46:58,834 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:58,834 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:46:58,834 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824010288] [2019-10-14 21:46:58,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:46:58,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:46:58,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:46:58,856 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-10-14 21:46:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:58,944 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-10-14 21:46:58,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:46:58,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:46:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:58,955 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:46:58,956 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 21:46:58,959 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 21:46:58,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 21:46:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 21:46:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 21:46:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-14 21:46:58,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-10-14 21:46:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:58,995 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-14 21:46:58,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:46:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-14 21:46:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:46:58,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:58,996 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:58,997 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:58,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:58,998 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-10-14 21:46:58,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:58,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067930303] [2019-10-14 21:46:58,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:58,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,071 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 21:46:59,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067930303] [2019-10-14 21:46:59,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:59,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:59,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814231478] [2019-10-14 21:46:59,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:59,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:59,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:59,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:59,075 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-10-14 21:46:59,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:59,168 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-10-14 21:46:59,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:59,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:46:59,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:59,170 INFO L225 Difference]: With dead ends: 32 [2019-10-14 21:46:59,171 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 21:46:59,172 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 21:46:59,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 21:46:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 21:46:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 21:46:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-14 21:46:59,179 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-14 21:46:59,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:59,179 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-14 21:46:59,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-14 21:46:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:46:59,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:59,180 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,181 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-10-14 21:46:59,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138921848] [2019-10-14 21:46:59,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,182 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:59,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138921848] [2019-10-14 21:46:59,282 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:46:59,282 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:46:59,282 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603336926] [2019-10-14 21:46:59,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:46:59,283 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:59,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:46:59,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:46:59,284 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-10-14 21:46:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:59,388 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-10-14 21:46:59,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:46:59,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:46:59,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:59,392 INFO L225 Difference]: With dead ends: 34 [2019-10-14 21:46:59,392 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 21:46:59,393 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 21:46:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 21:46:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-10-14 21:46:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 21:46:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-14 21:46:59,403 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-10-14 21:46:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:59,403 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-14 21:46:59,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:46:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-14 21:46:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:46:59,404 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:59,404 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,405 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,405 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-10-14 21:46:59,405 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,406 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119656650] [2019-10-14 21:46:59,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,406 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:59,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119656650] [2019-10-14 21:46:59,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247056250] [2019-10-14 21:46:59,513 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 21:46:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:59,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:46:59,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:59,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:46:59,626 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:59,626 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:46:59,627 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298931747] [2019-10-14 21:46:59,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:46:59,628 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:59,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:46:59,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:59,629 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-10-14 21:46:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:59,744 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 21:46:59,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:46:59,745 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-10-14 21:46:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:59,746 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:46:59,746 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:46:59,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:46:59,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:46:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-10-14 21:46:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:46:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:46:59,753 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-10-14 21:46:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:59,753 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:46:59,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:46:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:46:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:46:59,754 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:59,754 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:59,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:59,958 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:59,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-10-14 21:46:59,959 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:59,959 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991891759] [2019-10-14 21:46:59,959 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:59,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:47:00,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991891759] [2019-10-14 21:47:00,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967722653] [2019-10-14 21:47:00,085 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:00,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:00,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:00,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:47:00,172 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:00,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-10-14 21:47:00,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420208613] [2019-10-14 21:47:00,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:47:00,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:47:00,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:00,174 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-10-14 21:47:00,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:00,310 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-10-14 21:47:00,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:47:00,311 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-10-14 21:47:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:00,312 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:47:00,312 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 21:47:00,313 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:47:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 21:47:00,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-10-14 21:47:00,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:47:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-10-14 21:47:00,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-10-14 21:47:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:00,320 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-10-14 21:47:00,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:47:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-10-14 21:47:00,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:47:00,321 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:00,322 INFO L380 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:00,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,522 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:00,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-10-14 21:47:00,523 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:00,523 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459354118] [2019-10-14 21:47:00,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:00,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:47:00,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459354118] [2019-10-14 21:47:00,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508482817] [2019-10-14 21:47:00,641 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:00,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:47:00,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:00,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:47:00,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:47:00,707 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:00,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:47:00,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711004195] [2019-10-14 21:47:00,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:47:00,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:00,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:47:00,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:00,709 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-10-14 21:47:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:00,838 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-10-14 21:47:00,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:47:00,839 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-10-14 21:47:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:00,840 INFO L225 Difference]: With dead ends: 51 [2019-10-14 21:47:00,840 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 21:47:00,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:47:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 21:47:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-10-14 21:47:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:47:00,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-14 21:47:00,854 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-10-14 21:47:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:00,854 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-14 21:47:00,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:47:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-14 21:47:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:47:00,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:00,856 INFO L380 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:01,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,057 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-10-14 21:47:01,058 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:01,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096278094] [2019-10-14 21:47:01,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-14 21:47:01,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096278094] [2019-10-14 21:47:01,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466805948] [2019-10-14 21:47:01,143 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,191 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:01,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:01,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:01,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:47:01,277 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:01,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-10-14 21:47:01,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708299470] [2019-10-14 21:47:01,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:47:01,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:47:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:01,279 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 15 states. [2019-10-14 21:47:01,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:01,453 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-10-14 21:47:01,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:47:01,454 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2019-10-14 21:47:01,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:01,455 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:47:01,455 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:47:01,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:47:01,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:47:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2019-10-14 21:47:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:47:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-14 21:47:01,462 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2019-10-14 21:47:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:01,463 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-14 21:47:01,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:47:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-14 21:47:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:47:01,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:01,464 INFO L380 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:01,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,673 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:01,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:01,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1290022011, now seen corresponding path program 5 times [2019-10-14 21:47:01,674 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:01,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36380317] [2019-10-14 21:47:01,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:01,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:01,799 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-14 21:47:01,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36380317] [2019-10-14 21:47:01,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443396716] [2019-10-14 21:47:01,800 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:01,965 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 21:47:01,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:01,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:47:01,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:02,069 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 21:47:02,069 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:02,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2019-10-14 21:47:02,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542822046] [2019-10-14 21:47:02,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:47:02,070 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:02,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:47:02,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:02,071 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 20 states. [2019-10-14 21:47:02,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:02,244 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2019-10-14 21:47:02,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:47:02,246 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2019-10-14 21:47:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:02,247 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:47:02,247 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:47:02,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:47:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:47:02,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2019-10-14 21:47:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:47:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-14 21:47:02,255 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 31 [2019-10-14 21:47:02,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:02,256 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-14 21:47:02,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:47:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-14 21:47:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:47:02,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:02,257 INFO L380 BasicCegarLoop]: trace histogram [16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:02,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:02,469 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash 678305990, now seen corresponding path program 6 times [2019-10-14 21:47:02,469 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:02,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170354229] [2019-10-14 21:47:02,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:02,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:02,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:02,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170354229] [2019-10-14 21:47:02,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037164176] [2019-10-14 21:47:02,604 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:02,838 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 21:47:02,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:02,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:47:02,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:02,857 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:02,858 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-14 21:47:02,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274564357] [2019-10-14 21:47:02,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:47:02,858 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:02,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:47:02,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:02,859 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2019-10-14 21:47:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:03,028 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2019-10-14 21:47:03,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:47:03,029 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-10-14 21:47:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:03,030 INFO L225 Difference]: With dead ends: 73 [2019-10-14 21:47:03,030 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 21:47:03,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:47:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 21:47:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-10-14 21:47:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:47:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-10-14 21:47:03,038 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-10-14 21:47:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:03,038 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-10-14 21:47:03,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:47:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-10-14 21:47:03,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:47:03,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:03,040 INFO L380 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:03,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:03,244 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1729755721, now seen corresponding path program 7 times [2019-10-14 21:47:03,245 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:03,245 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169348621] [2019-10-14 21:47:03,245 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-10-14 21:47:03,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169348621] [2019-10-14 21:47:03,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152732102] [2019-10-14 21:47:03,350 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:03,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:47:03,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:47:03,539 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:03,539 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 26 [2019-10-14 21:47:03,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518416087] [2019-10-14 21:47:03,540 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:47:03,540 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:03,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:47:03,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:47:03,541 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 26 states. [2019-10-14 21:47:03,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:03,755 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2019-10-14 21:47:03,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:47:03,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2019-10-14 21:47:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:03,756 INFO L225 Difference]: With dead ends: 92 [2019-10-14 21:47:03,756 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:47:03,757 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:47:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:47:03,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2019-10-14 21:47:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:47:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-10-14 21:47:03,765 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2019-10-14 21:47:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:03,768 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-10-14 21:47:03,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:47:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-10-14 21:47:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:47:03,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:03,769 INFO L380 BasicCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:03,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:03,973 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:03,974 INFO L82 PathProgramCache]: Analyzing trace with hash 937361062, now seen corresponding path program 8 times [2019-10-14 21:47:03,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:03,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608232916] [2019-10-14 21:47:03,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:03,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-14 21:47:04,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608232916] [2019-10-14 21:47:04,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519875511] [2019-10-14 21:47:04,107 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:04,168 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:47:04,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:04,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:47:04,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-14 21:47:04,516 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:04,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 25] total 32 [2019-10-14 21:47:04,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946412277] [2019-10-14 21:47:04,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 21:47:04,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:04,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 21:47:04,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:47:04,521 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 32 states. [2019-10-14 21:47:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:04,793 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2019-10-14 21:47:04,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:47:04,793 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2019-10-14 21:47:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:04,794 INFO L225 Difference]: With dead ends: 103 [2019-10-14 21:47:04,795 INFO L226 Difference]: Without dead ends: 83 [2019-10-14 21:47:04,796 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:47:04,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-14 21:47:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2019-10-14 21:47:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-14 21:47:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-10-14 21:47:04,803 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 45 [2019-10-14 21:47:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:04,803 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-10-14 21:47:04,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 21:47:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-10-14 21:47:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:47:04,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:04,805 INFO L380 BasicCegarLoop]: trace histogram [28, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:05,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:05,017 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:05,018 INFO L82 PathProgramCache]: Analyzing trace with hash -99026199, now seen corresponding path program 9 times [2019-10-14 21:47:05,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:05,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367611763] [2019-10-14 21:47:05,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:05,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:05,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-10-14 21:47:05,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367611763] [2019-10-14 21:47:05,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216088043] [2019-10-14 21:47:05,164 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:05,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:47:05,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:05,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:47:05,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-10-14 21:47:05,622 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:05,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-14 21:47:05,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506351708] [2019-10-14 21:47:05,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:47:05,623 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:05,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:47:05,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:05,623 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 14 states. [2019-10-14 21:47:05,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:05,797 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2019-10-14 21:47:05,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:47:05,798 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2019-10-14 21:47:05,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:05,800 INFO L225 Difference]: With dead ends: 97 [2019-10-14 21:47:05,800 INFO L226 Difference]: Without dead ends: 87 [2019-10-14 21:47:05,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:47:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-10-14 21:47:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 57. [2019-10-14 21:47:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 21:47:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-10-14 21:47:05,809 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2019-10-14 21:47:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:05,809 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-10-14 21:47:05,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:47:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-10-14 21:47:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 21:47:05,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:05,810 INFO L380 BasicCegarLoop]: trace histogram [28, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:06,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:06,023 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:06,024 INFO L82 PathProgramCache]: Analyzing trace with hash -892705658, now seen corresponding path program 10 times [2019-10-14 21:47:06,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:06,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937357302] [2019-10-14 21:47:06,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:06,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:06,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-10-14 21:47:06,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937357302] [2019-10-14 21:47:06,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132065707] [2019-10-14 21:47:06,181 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:06,260 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:47:06,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:47:06,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:47:06,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:47:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:47:06,522 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:47:06,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 31] total 39 [2019-10-14 21:47:06,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628693737] [2019-10-14 21:47:06,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 21:47:06,523 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:47:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 21:47:06,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=778, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:47:06,525 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 39 states. [2019-10-14 21:47:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:47:06,844 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2019-10-14 21:47:06,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 21:47:06,845 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 53 [2019-10-14 21:47:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:47:06,847 INFO L225 Difference]: With dead ends: 120 [2019-10-14 21:47:06,847 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:47:06,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=704, Invalid=778, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 21:47:06,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:47:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2019-10-14 21:47:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:47:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-10-14 21:47:06,857 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 53 [2019-10-14 21:47:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:47:06,858 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-10-14 21:47:06,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 21:47:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-10-14 21:47:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 21:47:06,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:47:06,859 INFO L380 BasicCegarLoop]: trace histogram [35, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:47:07,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:47:07,071 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:47:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:47:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1164458139, now seen corresponding path program 11 times [2019-10-14 21:47:07,072 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:47:07,073 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443712174] [2019-10-14 21:47:07,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:07,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:47:07,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:47:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:47:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-10-14 21:47:07,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443712174] [2019-10-14 21:47:07,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141651403] [2019-10-14 21:47:07,247 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