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/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:57:46,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:57:46,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:57:46,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 12:57:46,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 12:57:46,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 12:57:46,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 12:57:46,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 12:57:46,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 12:57:46,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 12:57:46,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 12:57:46,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 12:57:46,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:57:46,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:57:46,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:57:46,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:57:46,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:57:46,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:57:46,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:57:46,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:57:46,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:57:46,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:57:46,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:57:46,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:57:46,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:57:46,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 12:57:46,533 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 12:57:46,534 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 12:57:46,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 12:57:46,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 12:57:46,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 12:57:46,536 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 12:57:46,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 12:57:46,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:57:46,538 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:57:46,538 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:57:46,539 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 [2019-09-20 12:57:46,553 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:57:46,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:57:46,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:57:46,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:57:46,555 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:57:46,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:57:46,556 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:57:46,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:57:46,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:57:46,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:57:46,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:57:46,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:57:46,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:57:46,557 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:57:46,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:57:46,557 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:57:46,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:57:46,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:57:46,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:57:46,558 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:57:46,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:57:46,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:57:46,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:57:46,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:57:46,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:57:46,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:57:46,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:57:46,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:57:46,560 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:57:46,589 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:57:46,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:57:46,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:57:46,609 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:57:46,609 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:57:46,610 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-09-20 12:57:46,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fdfa716a/9bc7e7f539e04bdfa2317f195ab39d82/FLAG7c9d6cbf8 [2019-09-20 12:57:47,141 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:57:47,142 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2019-09-20 12:57:47,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fdfa716a/9bc7e7f539e04bdfa2317f195ab39d82/FLAG7c9d6cbf8 [2019-09-20 12:57:47,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fdfa716a/9bc7e7f539e04bdfa2317f195ab39d82 [2019-09-20 12:57:47,579 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:57:47,581 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:57:47,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:47,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:57:47,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:57:47,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:47" (1/1) ... [2019-09-20 12:57:47,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54c2f8ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47, skipping insertion in model container [2019-09-20 12:57:47,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:47" (1/1) ... [2019-09-20 12:57:47,597 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:57:47,611 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:57:47,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:47,804 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:57:47,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:47,830 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:57:47,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47 WrapperNode [2019-09-20 12:57:47,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:47,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:57:47,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:57:47,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:57:47,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47" (1/1) ... [2019-09-20 12:57:47,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47" (1/1) ... [2019-09-20 12:57:47,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47" (1/1) ... [2019-09-20 12:57:47,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47" (1/1) ... [2019-09-20 12:57:47,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47" (1/1) ... [2019-09-20 12:57:47,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47" (1/1) ... [2019-09-20 12:57:47,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47" (1/1) ... [2019-09-20 12:57:47,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:57:47,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:57:47,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:57:47,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:57:47,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47" (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 [2019-09-20 12:57:48,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:57:48,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:57:48,003 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:57:48,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:57:48,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:57:48,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:57:48,004 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:57:48,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:57:48,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:57:48,182 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:57:48,183 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-20 12:57:48,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:48 BoogieIcfgContainer [2019-09-20 12:57:48,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:57:48,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:57:48,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:57:48,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:57:48,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:57:47" (1/3) ... [2019-09-20 12:57:48,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bbad16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:48, skipping insertion in model container [2019-09-20 12:57:48,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:47" (2/3) ... [2019-09-20 12:57:48,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bbad16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:48, skipping insertion in model container [2019-09-20 12:57:48,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:48" (3/3) ... [2019-09-20 12:57:48,192 INFO L109 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2019-09-20 12:57:48,200 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:57:48,206 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:57:48,222 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:57:48,249 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:57:48,250 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:57:48,250 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:57:48,250 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:57:48,250 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:57:48,250 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:57:48,251 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:57:48,251 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:57:48,251 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:57:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-20 12:57:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:57:48,270 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:48,271 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:48,273 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:48,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:48,278 INFO L82 PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times [2019-09-20 12:57:48,280 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:48,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:48,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:48,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:48,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:48,583 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-09-20 12:57:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:48,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:48,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:57:48,610 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:57:48,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:57:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:48,642 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-09-20 12:57:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:48,722 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2019-09-20 12:57:48,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:57:48,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-20 12:57:48,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:48,735 INFO L225 Difference]: With dead ends: 36 [2019-09-20 12:57:48,736 INFO L226 Difference]: Without dead ends: 16 [2019-09-20 12:57:48,742 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:48,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-20 12:57:48,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2019-09-20 12:57:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-20 12:57:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-20 12:57:48,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-20 12:57:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:48,794 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-20 12:57:48,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:57:48,794 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-20 12:57:48,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 12:57:48,797 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:48,798 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:48,798 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:48,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:48,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1621360120, now seen corresponding path program 1 times [2019-09-20 12:57:48,801 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:48,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:48,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:48,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:48,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:48,897 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:48,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:57:48,898 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:57:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:57:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:48,900 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2019-09-20 12:57:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:48,916 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2019-09-20 12:57:48,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:57:48,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-20 12:57:48,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:48,918 INFO L225 Difference]: With dead ends: 23 [2019-09-20 12:57:48,918 INFO L226 Difference]: Without dead ends: 15 [2019-09-20 12:57:48,919 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-20 12:57:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-20 12:57:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-20 12:57:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-20 12:57:48,924 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2019-09-20 12:57:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:48,925 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-20 12:57:48,925 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:57:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-20 12:57:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 12:57:48,926 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:48,926 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:48,926 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:48,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:48,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1574756514, now seen corresponding path program 1 times [2019-09-20 12:57:48,927 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:48,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:48,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:48,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:48,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:49,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:49,015 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:49,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:49,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 12:57:49,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:49,120 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:49,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-20 12:57:49,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:57:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:57:49,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:57:49,122 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2019-09-20 12:57:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:49,232 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-09-20 12:57:49,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 12:57:49,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-20 12:57:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:49,235 INFO L225 Difference]: With dead ends: 34 [2019-09-20 12:57:49,235 INFO L226 Difference]: Without dead ends: 25 [2019-09-20 12:57:49,236 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-20 12:57:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2019-09-20 12:57:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-20 12:57:49,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-09-20 12:57:49,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2019-09-20 12:57:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:49,243 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-09-20 12:57:49,243 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:57:49,243 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-09-20 12:57:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 12:57:49,244 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:49,244 INFO L407 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:49,245 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:49,245 INFO L82 PathProgramCache]: Analyzing trace with hash 93409041, now seen corresponding path program 2 times [2019-09-20 12:57:49,245 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:49,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:49,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:49,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:49,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-20 12:57:49,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:49,387 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:49,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:57:49,435 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:57:49,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:49,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-20 12:57:49,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-20 12:57:49,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:49,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-20 12:57:49,478 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 12:57:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 12:57:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:57:49,478 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2019-09-20 12:57:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:49,752 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-09-20 12:57:49,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-20 12:57:49,753 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-09-20 12:57:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:49,754 INFO L225 Difference]: With dead ends: 46 [2019-09-20 12:57:49,754 INFO L226 Difference]: Without dead ends: 34 [2019-09-20 12:57:49,755 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-09-20 12:57:49,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-20 12:57:49,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-09-20 12:57:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-20 12:57:49,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-09-20 12:57:49,763 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2019-09-20 12:57:49,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:49,764 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-09-20 12:57:49,764 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 12:57:49,764 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-09-20 12:57:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-20 12:57:49,765 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:49,765 INFO L407 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:49,765 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash 50981508, now seen corresponding path program 3 times [2019-09-20 12:57:49,766 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:49,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:49,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:49,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:49,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-09-20 12:57:49,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:49,912 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:49,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 12:57:49,976 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-20 12:57:49,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:49,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 12:57:49,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-09-20 12:57:50,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:50,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-20 12:57:50,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:57:50,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:57:50,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:57:50,018 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2019-09-20 12:57:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:50,052 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-09-20 12:57:50,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 12:57:50,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-09-20 12:57:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:50,054 INFO L225 Difference]: With dead ends: 51 [2019-09-20 12:57:50,054 INFO L226 Difference]: Without dead ends: 32 [2019-09-20 12:57:50,055 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:57:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-20 12:57:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-20 12:57:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-20 12:57:50,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-09-20 12:57:50,062 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 28 [2019-09-20 12:57:50,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:50,062 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-09-20 12:57:50,063 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:57:50,063 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-09-20 12:57:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-20 12:57:50,064 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:50,064 INFO L407 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:50,064 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:50,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1418818136, now seen corresponding path program 4 times [2019-09-20 12:57:50,065 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:50,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:50,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:50,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:50,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-09-20 12:57:50,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:50,184 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:50,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:50,222 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:57:50,222 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:50,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-20 12:57:50,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-20 12:57:50,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:50,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2019-09-20 12:57:50,350 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-20 12:57:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-20 12:57:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-09-20 12:57:50,351 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 15 states. [2019-09-20 12:57:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:50,807 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2019-09-20 12:57:50,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-20 12:57:50,814 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2019-09-20 12:57:50,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:50,815 INFO L225 Difference]: With dead ends: 71 [2019-09-20 12:57:50,816 INFO L226 Difference]: Without dead ends: 50 [2019-09-20 12:57:50,818 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2019-09-20 12:57:50,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-20 12:57:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2019-09-20 12:57:50,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-20 12:57:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-20 12:57:50,827 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 31 [2019-09-20 12:57:50,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:50,828 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-20 12:57:50,828 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-20 12:57:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-20 12:57:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-20 12:57:50,829 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:50,829 INFO L407 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:50,829 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1949427083, now seen corresponding path program 5 times [2019-09-20 12:57:50,830 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:50,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:50,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:50,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:50,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-20 12:57:50,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:50,984 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:51,006 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-20 12:57:51,054 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-20 12:57:51,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:51,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-20 12:57:51,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-09-20 12:57:51,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:51,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-20 12:57:51,102 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 12:57:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 12:57:51,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:57:51,103 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 9 states. [2019-09-20 12:57:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:51,153 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2019-09-20 12:57:51,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 12:57:51,154 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-09-20 12:57:51,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:51,155 INFO L225 Difference]: With dead ends: 78 [2019-09-20 12:57:51,155 INFO L226 Difference]: Without dead ends: 47 [2019-09-20 12:57:51,155 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:57:51,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-20 12:57:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-20 12:57:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-20 12:57:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-20 12:57:51,164 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 42 [2019-09-20 12:57:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:51,165 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-20 12:57:51,165 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 12:57:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-20 12:57:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-20 12:57:51,166 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:51,167 INFO L407 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:51,167 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:51,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:51,167 INFO L82 PathProgramCache]: Analyzing trace with hash -649475471, now seen corresponding path program 6 times [2019-09-20 12:57:51,167 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:51,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:51,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:51,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:51,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-09-20 12:57:51,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:51,378 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:51,397 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:51,473 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-09-20 12:57:51,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:51,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 12:57:51,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 254 proven. 21 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-09-20 12:57:51,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:51,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-20 12:57:51,514 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 12:57:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 12:57:51,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:51,515 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 10 states. [2019-09-20 12:57:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:51,577 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-09-20 12:57:51,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 12:57:51,578 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2019-09-20 12:57:51,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:51,579 INFO L225 Difference]: With dead ends: 85 [2019-09-20 12:57:51,579 INFO L226 Difference]: Without dead ends: 51 [2019-09-20 12:57:51,579 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-20 12:57:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-20 12:57:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-20 12:57:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-20 12:57:51,588 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 46 [2019-09-20 12:57:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:51,589 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-20 12:57:51,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 12:57:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-20 12:57:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-20 12:57:51,590 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:51,590 INFO L407 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:51,590 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:51,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1892649995, now seen corresponding path program 7 times [2019-09-20 12:57:51,591 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:51,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:51,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:51,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:51,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:51,753 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-20 12:57:51,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:51,753 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:51,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:51,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-20 12:57:51,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Stream closed [2019-09-20 12:57:51,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:51,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-09-20 12:57:51,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-20 12:57:51,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-20 12:57:51,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-09-20 12:57:51,996 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 20 states. [2019-09-20 12:57:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:52,923 INFO L93 Difference]: Finished difference Result 113 states and 129 transitions. [2019-09-20 12:57:52,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-20 12:57:52,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2019-09-20 12:57:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:52,926 INFO L225 Difference]: With dead ends: 113 [2019-09-20 12:57:52,926 INFO L226 Difference]: Without dead ends: 76 [2019-09-20 12:57:52,933 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=2706, Unknown=0, NotChecked=0, Total=2970 [2019-09-20 12:57:52,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-20 12:57:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2019-09-20 12:57:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-20 12:57:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2019-09-20 12:57:52,949 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 50 [2019-09-20 12:57:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:52,949 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2019-09-20 12:57:52,949 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-20 12:57:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2019-09-20 12:57:52,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-20 12:57:52,951 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:52,951 INFO L407 BasicCegarLoop]: trace histogram [40, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:52,952 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:52,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:52,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1564944312, now seen corresponding path program 8 times [2019-09-20 12:57:52,952 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:52,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:52,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:52,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:52,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2019-09-20 12:57:53,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:53,194 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:53,231 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 12:57:53,275 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:57:53,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:53,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-20 12:57:53,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 0 proven. 868 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-09-20 12:57:53,485 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:53,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2019-09-20 12:57:53,486 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-20 12:57:53,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-20 12:57:53,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2019-09-20 12:57:53,487 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 23 states. [2019-09-20 12:57:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:54,945 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2019-09-20 12:57:54,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-20 12:57:54,946 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2019-09-20 12:57:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:54,947 INFO L225 Difference]: With dead ends: 145 [2019-09-20 12:57:54,948 INFO L226 Difference]: Without dead ends: 94 [2019-09-20 12:57:54,951 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=4619, Unknown=0, NotChecked=0, Total=4970 [2019-09-20 12:57:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-20 12:57:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2019-09-20 12:57:54,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-20 12:57:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2019-09-20 12:57:54,963 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 65 [2019-09-20 12:57:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:54,963 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2019-09-20 12:57:54,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-20 12:57:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2019-09-20 12:57:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-20 12:57:54,965 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:54,965 INFO L407 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:54,965 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1497018839, now seen corresponding path program 9 times [2019-09-20 12:57:54,966 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:54,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:54,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:54,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:54,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1255 trivial. 0 not checked. [2019-09-20 12:57:55,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:55,133 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:55,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:55,341 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-20 12:57:55,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:55,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-20 12:57:55,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 511 proven. 45 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2019-09-20 12:57:55,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:55,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-20 12:57:55,391 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-20 12:57:55,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-20 12:57:55,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-20 12:57:55,392 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand 13 states. [2019-09-20 12:57:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:55,478 INFO L93 Difference]: Finished difference Result 156 states and 173 transitions. [2019-09-20 12:57:55,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-20 12:57:55,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2019-09-20 12:57:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:55,480 INFO L225 Difference]: With dead ends: 156 [2019-09-20 12:57:55,480 INFO L226 Difference]: Without dead ends: 89 [2019-09-20 12:57:55,481 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-20 12:57:55,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-20 12:57:55,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-20 12:57:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-20 12:57:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2019-09-20 12:57:55,493 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 82 [2019-09-20 12:57:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:55,494 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2019-09-20 12:57:55,494 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-20 12:57:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2019-09-20 12:57:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-20 12:57:55,495 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:55,495 INFO L407 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:55,496 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:55,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:55,496 INFO L82 PathProgramCache]: Analyzing trace with hash 642319569, now seen corresponding path program 10 times [2019-09-20 12:57:55,496 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:55,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:55,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:55,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-20 12:57:55,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:55,698 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:55,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:55,777 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:57:55,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:55,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-20 12:57:55,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1900 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2019-09-20 12:57:55,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:55,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16] total 17 [2019-09-20 12:57:55,963 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-20 12:57:55,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-20 12:57:55,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-09-20 12:57:55,964 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 17 states. [2019-09-20 12:57:56,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:56,179 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2019-09-20 12:57:56,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 12:57:56,179 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2019-09-20 12:57:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:56,181 INFO L225 Difference]: With dead ends: 119 [2019-09-20 12:57:56,181 INFO L226 Difference]: Without dead ends: 114 [2019-09-20 12:57:56,181 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2019-09-20 12:57:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-20 12:57:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 102. [2019-09-20 12:57:56,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-20 12:57:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2019-09-20 12:57:56,194 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 88 [2019-09-20 12:57:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:56,195 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2019-09-20 12:57:56,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-20 12:57:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2019-09-20 12:57:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-20 12:57:56,196 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:56,197 INFO L407 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:56,197 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:56,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:56,197 INFO L82 PathProgramCache]: Analyzing trace with hash -284489192, now seen corresponding path program 11 times [2019-09-20 12:57:56,197 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:56,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:56,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:56,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:56,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2019-09-20 12:57:56,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:56,434 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:56,457 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1