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/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-01 22:28:50,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-01 22:28:50,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-01 22:28:50,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-01 22:28:50,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-01 22:28:50,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-01 22:28:50,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-01 22:28:50,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-01 22:28:50,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-01 22:28:50,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-01 22:28:50,540 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-01 22:28:50,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-01 22:28:50,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-01 22:28:50,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-01 22:28:50,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-01 22:28:50,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-01 22:28:50,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-01 22:28:50,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-01 22:28:50,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-01 22:28:50,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-01 22:28:50,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-01 22:28:50,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-01 22:28:50,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-01 22:28:50,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-01 22:28:50,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-01 22:28:50,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-01 22:28:50,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-01 22:28:50,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-01 22:28:50,581 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 [2019-10-01 22:28:50,611 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-01 22:28:50,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-01 22:28:50,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-01 22:28:50,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-01 22:28:50,614 INFO L138 SettingsManager]: * Use SBE=true [2019-10-01 22:28:50,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-01 22:28:50,614 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-01 22:28:50,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-01 22:28:50,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-01 22:28:50,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-01 22:28:50,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-01 22:28:50,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-01 22:28:50,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-01 22:28:50,617 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-01 22:28:50,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-01 22:28:50,617 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-01 22:28:50,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-01 22:28:50,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-01 22:28:50,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-01 22:28:50,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-01 22:28:50,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-01 22:28:50,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-01 22:28:50,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-01 22:28:50,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-01 22:28:50,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-01 22:28:50,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-01 22:28:50,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-01 22:28:50,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-01 22:28:50,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-01 22:28:50,656 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-01 22:28:50,669 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-01 22:28:50,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-01 22:28:50,673 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-01 22:28:50,674 INFO L275 PluginConnector]: CDTParser initialized [2019-10-01 22:28:50,675 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-10-01 22:28:50,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d682c62ad/c87938245c864fd19253d37992e7c7b6/FLAG18d4a2cd8 [2019-10-01 22:28:51,184 INFO L306 CDTParser]: Found 1 translation units. [2019-10-01 22:28:51,186 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-10-01 22:28:51,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d682c62ad/c87938245c864fd19253d37992e7c7b6/FLAG18d4a2cd8 [2019-10-01 22:28:51,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d682c62ad/c87938245c864fd19253d37992e7c7b6 [2019-10-01 22:28:51,576 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-01 22:28:51,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-01 22:28:51,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-01 22:28:51,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-01 22:28:51,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-01 22:28:51,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:28:51" (1/1) ... [2019-10-01 22:28:51,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12ad8be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51, skipping insertion in model container [2019-10-01 22:28:51,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.10 10:28:51" (1/1) ... [2019-10-01 22:28:51,592 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-01 22:28:51,608 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-01 22:28:51,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:28:51,797 INFO L188 MainTranslator]: Completed pre-run [2019-10-01 22:28:51,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-01 22:28:51,928 INFO L192 MainTranslator]: Completed translation [2019-10-01 22:28:51,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51 WrapperNode [2019-10-01 22:28:51,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-01 22:28:51,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-01 22:28:51,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-01 22:28:51,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-01 22:28:51,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51" (1/1) ... [2019-10-01 22:28:51,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51" (1/1) ... [2019-10-01 22:28:51,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51" (1/1) ... [2019-10-01 22:28:51,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51" (1/1) ... [2019-10-01 22:28:51,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51" (1/1) ... [2019-10-01 22:28:51,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51" (1/1) ... [2019-10-01 22:28:51,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51" (1/1) ... [2019-10-01 22:28:51,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-01 22:28:51,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-01 22:28:51,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-01 22:28:51,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-01 22:28:51,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51" (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 [2019-10-01 22:28:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-01 22:28:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-01 22:28:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-01 22:28:52,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-01 22:28:52,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-01 22:28:52,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-01 22:28:52,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-01 22:28:52,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-01 22:28:52,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-01 22:28:52,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-01 22:28:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-01 22:28:52,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-01 22:28:52,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-01 22:28:52,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-01 22:28:52,383 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-01 22:28:52,383 INFO L283 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-01 22:28:52,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:28:52 BoogieIcfgContainer [2019-10-01 22:28:52,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-01 22:28:52,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-01 22:28:52,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-01 22:28:52,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-01 22:28:52,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.10 10:28:51" (1/3) ... [2019-10-01 22:28:52,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284292e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:28:52, skipping insertion in model container [2019-10-01 22:28:52,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.10 10:28:51" (2/3) ... [2019-10-01 22:28:52,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284292e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 10:28:52, skipping insertion in model container [2019-10-01 22:28:52,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 10:28:52" (3/3) ... [2019-10-01 22:28:52,392 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2019-10-01 22:28:52,402 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-01 22:28:52,410 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-01 22:28:52,427 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-01 22:28:52,457 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-10-01 22:28:52,458 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-01 22:28:52,458 INFO L378 AbstractCegarLoop]: Hoare is true [2019-10-01 22:28:52,458 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-01 22:28:52,458 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-01 22:28:52,458 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-01 22:28:52,459 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-01 22:28:52,459 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-01 22:28:52,459 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-01 22:28:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-01 22:28:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-01 22:28:52,483 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:52,484 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:52,486 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:52,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:52,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2019-10-01 22:28:52,493 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:52,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:52,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:52,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:28:52,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:28:52,626 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:28:52,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-01 22:28:52,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-01 22:28:52,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-01 22:28:52,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 22:28:52,648 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2019-10-01 22:28:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:52,678 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-10-01 22:28:52,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-01 22:28:52,680 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-10-01 22:28:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:52,694 INFO L225 Difference]: With dead ends: 82 [2019-10-01 22:28:52,694 INFO L226 Difference]: Without dead ends: 40 [2019-10-01 22:28:52,703 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-01 22:28:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-01 22:28:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-01 22:28:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-01 22:28:52,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-10-01 22:28:52,779 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2019-10-01 22:28:52,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:52,780 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-10-01 22:28:52,781 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-01 22:28:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-10-01 22:28:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-01 22:28:52,787 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:52,787 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:52,787 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:52,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:52,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2019-10-01 22:28:52,790 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:52,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:52,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:52,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:28:52,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-01 22:28:52,866 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:28:52,867 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-01 22:28:52,868 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-01 22:28:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-01 22:28:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-01 22:28:52,870 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 3 states. [2019-10-01 22:28:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:53,001 INFO L93 Difference]: Finished difference Result 92 states and 123 transitions. [2019-10-01 22:28:53,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-01 22:28:53,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-01 22:28:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:53,006 INFO L225 Difference]: With dead ends: 92 [2019-10-01 22:28:53,006 INFO L226 Difference]: Without dead ends: 60 [2019-10-01 22:28:53,008 INFO L640 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 [2019-10-01 22:28:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-01 22:28:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2019-10-01 22:28:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-01 22:28:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-01 22:28:53,037 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 16 [2019-10-01 22:28:53,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:53,038 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-01 22:28:53,038 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-01 22:28:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-01 22:28:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-01 22:28:53,040 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:53,041 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:53,041 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:53,042 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2019-10-01 22:28:53,042 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:53,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:53,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:53,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:28:53,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:28:53,180 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-01 22:28:53,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-01 22:28:53,181 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-01 22:28:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-01 22:28:53,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-01 22:28:53,182 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2019-10-01 22:28:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:53,298 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2019-10-01 22:28:53,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-01 22:28:53,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-01 22:28:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:53,300 INFO L225 Difference]: With dead ends: 94 [2019-10-01 22:28:53,300 INFO L226 Difference]: Without dead ends: 63 [2019-10-01 22:28:53,301 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-01 22:28:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-01 22:28:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2019-10-01 22:28:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-01 22:28:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-10-01 22:28:53,309 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 20 [2019-10-01 22:28:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:53,310 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-10-01 22:28:53,310 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-01 22:28:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-10-01 22:28:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-01 22:28:53,311 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:53,311 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:53,311 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:53,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1561235658, now seen corresponding path program 1 times [2019-10-01 22:28:53,312 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:53,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:53,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:53,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:28:53,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:53,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:28:53,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:28:53,370 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) [2019-10-01 22:28:53,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:28:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:53,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 22:28:53,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:28:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-01 22:28:53,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:28:53,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-01 22:28:53,523 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-01 22:28:53,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-01 22:28:53,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-01 22:28:53,524 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 7 states. [2019-10-01 22:28:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:53,713 INFO L93 Difference]: Finished difference Result 123 states and 167 transitions. [2019-10-01 22:28:53,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 22:28:53,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-10-01 22:28:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:53,715 INFO L225 Difference]: With dead ends: 123 [2019-10-01 22:28:53,716 INFO L226 Difference]: Without dead ends: 89 [2019-10-01 22:28:53,716 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:28:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-01 22:28:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2019-10-01 22:28:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-01 22:28:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2019-10-01 22:28:53,733 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 23 [2019-10-01 22:28:53,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:53,734 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2019-10-01 22:28:53,734 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-01 22:28:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2019-10-01 22:28:53,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-01 22:28:53,737 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:53,737 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:53,737 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2139625433, now seen corresponding path program 2 times [2019-10-01 22:28:53,738 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:53,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:53,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:53,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:28:53,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-01 22:28:53,831 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:28:53,831 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 [2019-10-01 22:28:53,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:28:53,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-01 22:28:53,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:28:53,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-01 22:28:53,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:28:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-01 22:28:53,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-01 22:28:53,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-10-01 22:28:53,911 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-01 22:28:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-01 22:28:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-01 22:28:53,912 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand 8 states. [2019-10-01 22:28:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:54,115 INFO L93 Difference]: Finished difference Result 114 states and 151 transitions. [2019-10-01 22:28:54,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-01 22:28:54,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-10-01 22:28:54,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:54,118 INFO L225 Difference]: With dead ends: 114 [2019-10-01 22:28:54,118 INFO L226 Difference]: Without dead ends: 67 [2019-10-01 22:28:54,120 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:28:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-01 22:28:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-01 22:28:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-01 22:28:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2019-10-01 22:28:54,139 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 28 [2019-10-01 22:28:54,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:54,140 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2019-10-01 22:28:54,140 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-01 22:28:54,141 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2019-10-01 22:28:54,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-01 22:28:54,142 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:54,142 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:54,142 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:54,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1607919396, now seen corresponding path program 1 times [2019-10-01 22:28:54,143 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:54,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:54,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:54,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:28:54,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-01 22:28:54,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:28:54,279 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 [2019-10-01 22:28:54,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:28:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:54,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-01 22:28:54,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:28:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-01 22:28:54,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:28:54,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-10-01 22:28:54,387 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-01 22:28:54,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-01 22:28:54,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-01 22:28:54,388 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand 10 states. [2019-10-01 22:28:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:54,682 INFO L93 Difference]: Finished difference Result 176 states and 241 transitions. [2019-10-01 22:28:54,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-01 22:28:54,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-10-01 22:28:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:54,684 INFO L225 Difference]: With dead ends: 176 [2019-10-01 22:28:54,685 INFO L226 Difference]: Without dead ends: 122 [2019-10-01 22:28:54,686 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2019-10-01 22:28:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-01 22:28:54,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2019-10-01 22:28:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-01 22:28:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 128 transitions. [2019-10-01 22:28:54,701 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 128 transitions. Word has length 32 [2019-10-01 22:28:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:54,703 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 128 transitions. [2019-10-01 22:28:54,704 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-01 22:28:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 128 transitions. [2019-10-01 22:28:54,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-01 22:28:54,705 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:54,708 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:54,709 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1707849543, now seen corresponding path program 2 times [2019-10-01 22:28:54,710 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:54,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:54,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:54,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:28:54,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-01 22:28:54,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:28:54,844 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:28:54,871 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:28:54,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:28:54,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:28:54,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-01 22:28:54,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:28:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-01 22:28:54,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:28:54,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-10-01 22:28:54,982 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-01 22:28:54,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-01 22:28:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-01 22:28:54,983 INFO L87 Difference]: Start difference. First operand 98 states and 128 transitions. Second operand 12 states. [2019-10-01 22:28:55,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:55,358 INFO L93 Difference]: Finished difference Result 242 states and 332 transitions. [2019-10-01 22:28:55,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-01 22:28:55,359 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-01 22:28:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:55,361 INFO L225 Difference]: With dead ends: 242 [2019-10-01 22:28:55,361 INFO L226 Difference]: Without dead ends: 157 [2019-10-01 22:28:55,362 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:28:55,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-01 22:28:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 131. [2019-10-01 22:28:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-01 22:28:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 173 transitions. [2019-10-01 22:28:55,385 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 173 transitions. Word has length 37 [2019-10-01 22:28:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:55,385 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 173 transitions. [2019-10-01 22:28:55,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-01 22:28:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 173 transitions. [2019-10-01 22:28:55,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-01 22:28:55,387 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:55,387 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:55,389 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:55,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2011697664, now seen corresponding path program 3 times [2019-10-01 22:28:55,390 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:55,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:55,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:55,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:28:55,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:55,511 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-01 22:28:55,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:28:55,511 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 [2019-10-01 22:28:55,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:28:55,578 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-01 22:28:55,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:28:55,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-01 22:28:55,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:28:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-01 22:28:55,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:28:55,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2019-10-01 22:28:55,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-01 22:28:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-01 22:28:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-10-01 22:28:55,647 INFO L87 Difference]: Start difference. First operand 131 states and 173 transitions. Second operand 14 states. [2019-10-01 22:28:56,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:56,156 INFO L93 Difference]: Finished difference Result 311 states and 428 transitions. [2019-10-01 22:28:56,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-01 22:28:56,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2019-10-01 22:28:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:56,159 INFO L225 Difference]: With dead ends: 311 [2019-10-01 22:28:56,159 INFO L226 Difference]: Without dead ends: 195 [2019-10-01 22:28:56,160 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=741, Unknown=0, NotChecked=0, Total=1122 [2019-10-01 22:28:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-10-01 22:28:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 167. [2019-10-01 22:28:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-10-01 22:28:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 222 transitions. [2019-10-01 22:28:56,173 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 222 transitions. Word has length 42 [2019-10-01 22:28:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:56,173 INFO L475 AbstractCegarLoop]: Abstraction has 167 states and 222 transitions. [2019-10-01 22:28:56,173 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-01 22:28:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 222 transitions. [2019-10-01 22:28:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-01 22:28:56,177 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:56,177 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:56,178 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:56,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2147025373, now seen corresponding path program 4 times [2019-10-01 22:28:56,178 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:56,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:56,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:56,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:28:56,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-01 22:28:56,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:28:56,310 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) [2019-10-01 22:28:56,333 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:28:56,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:28:56,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:28:56,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-01 22:28:56,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:28:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-01 22:28:56,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:28:56,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-10-01 22:28:56,441 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-01 22:28:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-01 22:28:56,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:28:56,443 INFO L87 Difference]: Start difference. First operand 167 states and 222 transitions. Second operand 16 states. [2019-10-01 22:28:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:57,126 INFO L93 Difference]: Finished difference Result 386 states and 532 transitions. [2019-10-01 22:28:57,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-01 22:28:57,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2019-10-01 22:28:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:57,128 INFO L225 Difference]: With dead ends: 386 [2019-10-01 22:28:57,128 INFO L226 Difference]: Without dead ends: 236 [2019-10-01 22:28:57,130 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=608, Invalid=1198, Unknown=0, NotChecked=0, Total=1806 [2019-10-01 22:28:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-10-01 22:28:57,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 206. [2019-10-01 22:28:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-10-01 22:28:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 275 transitions. [2019-10-01 22:28:57,144 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 275 transitions. Word has length 47 [2019-10-01 22:28:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:57,144 INFO L475 AbstractCegarLoop]: Abstraction has 206 states and 275 transitions. [2019-10-01 22:28:57,144 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-01 22:28:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 275 transitions. [2019-10-01 22:28:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-01 22:28:57,145 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:57,145 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:57,146 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:57,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1777867556, now seen corresponding path program 5 times [2019-10-01 22:28:57,146 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:57,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:57,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:57,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:28:57,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-01 22:28:57,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:28:57,293 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) [2019-10-01 22:28:57,324 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:28:57,414 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-10-01 22:28:57,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:28:57,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-01 22:28:57,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:28:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-01 22:28:57,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:28:57,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-10-01 22:28:57,506 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-01 22:28:57,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-01 22:28:57,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-10-01 22:28:57,506 INFO L87 Difference]: Start difference. First operand 206 states and 275 transitions. Second operand 18 states. [2019-10-01 22:28:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:58,406 INFO L93 Difference]: Finished difference Result 467 states and 644 transitions. [2019-10-01 22:28:58,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-01 22:28:58,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2019-10-01 22:28:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:58,413 INFO L225 Difference]: With dead ends: 467 [2019-10-01 22:28:58,413 INFO L226 Difference]: Without dead ends: 280 [2019-10-01 22:28:58,415 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=923, Invalid=1833, Unknown=0, NotChecked=0, Total=2756 [2019-10-01 22:28:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-10-01 22:28:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 248. [2019-10-01 22:28:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2019-10-01 22:28:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 332 transitions. [2019-10-01 22:28:58,428 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 332 transitions. Word has length 52 [2019-10-01 22:28:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:58,428 INFO L475 AbstractCegarLoop]: Abstraction has 248 states and 332 transitions. [2019-10-01 22:28:58,428 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-01 22:28:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 332 transitions. [2019-10-01 22:28:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-01 22:28:58,429 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:58,429 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:58,430 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:58,430 INFO L82 PathProgramCache]: Analyzing trace with hash 951457023, now seen corresponding path program 6 times [2019-10-01 22:28:58,430 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:58,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:58,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:58,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:28:58,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-01 22:28:58,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:28:58,530 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 [2019-10-01 22:28:58,556 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:28:58,627 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-01 22:28:58,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:28:58,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-01 22:28:58,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:28:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-01 22:28:58,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:28:58,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 16 [2019-10-01 22:28:58,687 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-01 22:28:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-01 22:28:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-10-01 22:28:58,687 INFO L87 Difference]: Start difference. First operand 248 states and 332 transitions. Second operand 16 states. [2019-10-01 22:28:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:28:58,968 INFO L93 Difference]: Finished difference Result 453 states and 614 transitions. [2019-10-01 22:28:58,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-01 22:28:58,968 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2019-10-01 22:28:58,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:28:58,971 INFO L225 Difference]: With dead ends: 453 [2019-10-01 22:28:58,971 INFO L226 Difference]: Without dead ends: 253 [2019-10-01 22:28:58,973 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2019-10-01 22:28:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-10-01 22:28:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2019-10-01 22:28:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2019-10-01 22:28:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 336 transitions. [2019-10-01 22:28:58,988 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 336 transitions. Word has length 57 [2019-10-01 22:28:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:28:58,990 INFO L475 AbstractCegarLoop]: Abstraction has 251 states and 336 transitions. [2019-10-01 22:28:58,990 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-01 22:28:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 336 transitions. [2019-10-01 22:28:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-01 22:28:58,997 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:28:58,997 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:28:58,998 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:28:58,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:28:58,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1861738138, now seen corresponding path program 7 times [2019-10-01 22:28:58,998 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:28:58,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:28:59,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:59,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:28:59,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:28:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-01 22:28:59,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:28:59,148 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:28:59,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:28:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:28:59,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-01 22:28:59,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:28:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-01 22:28:59,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:28:59,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2019-10-01 22:28:59,311 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-01 22:28:59,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-01 22:28:59,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-01 22:28:59,313 INFO L87 Difference]: Start difference. First operand 251 states and 336 transitions. Second operand 21 states. [2019-10-01 22:29:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:00,755 INFO L93 Difference]: Finished difference Result 581 states and 807 transitions. [2019-10-01 22:29:00,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-10-01 22:29:00,755 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2019-10-01 22:29:00,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:00,759 INFO L225 Difference]: With dead ends: 581 [2019-10-01 22:29:00,759 INFO L226 Difference]: Without dead ends: 351 [2019-10-01 22:29:00,763 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1730, Invalid=3526, Unknown=0, NotChecked=0, Total=5256 [2019-10-01 22:29:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2019-10-01 22:29:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 317. [2019-10-01 22:29:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-01 22:29:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 425 transitions. [2019-10-01 22:29:00,789 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 425 transitions. Word has length 60 [2019-10-01 22:29:00,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:00,790 INFO L475 AbstractCegarLoop]: Abstraction has 317 states and 425 transitions. [2019-10-01 22:29:00,790 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-01 22:29:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 425 transitions. [2019-10-01 22:29:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-01 22:29:00,791 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:00,791 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:00,792 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1442868867, now seen corresponding path program 8 times [2019-10-01 22:29:00,792 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:00,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:00,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:00,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:29:00,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-01 22:29:00,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:00,998 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:01,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:29:01,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:29:01,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:29:01,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-01 22:29:01,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-10-01 22:29:01,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:01,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2019-10-01 22:29:01,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-01 22:29:01,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-01 22:29:01,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-10-01 22:29:01,203 INFO L87 Difference]: Start difference. First operand 317 states and 425 transitions. Second operand 23 states. [2019-10-01 22:29:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:02,962 INFO L93 Difference]: Finished difference Result 698 states and 961 transitions. [2019-10-01 22:29:02,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-10-01 22:29:02,963 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2019-10-01 22:29:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:02,967 INFO L225 Difference]: With dead ends: 698 [2019-10-01 22:29:02,967 INFO L226 Difference]: Without dead ends: 404 [2019-10-01 22:29:02,972 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2404, Invalid=4906, Unknown=0, NotChecked=0, Total=7310 [2019-10-01 22:29:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-10-01 22:29:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 368. [2019-10-01 22:29:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2019-10-01 22:29:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 494 transitions. [2019-10-01 22:29:02,993 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 494 transitions. Word has length 65 [2019-10-01 22:29:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:02,993 INFO L475 AbstractCegarLoop]: Abstraction has 368 states and 494 transitions. [2019-10-01 22:29:02,994 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-01 22:29:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 494 transitions. [2019-10-01 22:29:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-01 22:29:02,996 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:02,996 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:02,996 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1410710794, now seen corresponding path program 9 times [2019-10-01 22:29:02,997 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:02,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:03,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:03,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:29:03,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-01 22:29:03,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:03,223 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 [2019-10-01 22:29:03,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:29:03,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-01 22:29:03,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:29:03,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-01 22:29:03,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2019-10-01 22:29:03,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:03,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2019-10-01 22:29:03,469 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-01 22:29:03,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-01 22:29:03,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2019-10-01 22:29:03,470 INFO L87 Difference]: Start difference. First operand 368 states and 494 transitions. Second operand 22 states. [2019-10-01 22:29:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:04,000 INFO L93 Difference]: Finished difference Result 713 states and 966 transitions. [2019-10-01 22:29:04,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-01 22:29:04,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 70 [2019-10-01 22:29:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:04,003 INFO L225 Difference]: With dead ends: 713 [2019-10-01 22:29:04,004 INFO L226 Difference]: Without dead ends: 377 [2019-10-01 22:29:04,005 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=740, Unknown=0, NotChecked=0, Total=1190 [2019-10-01 22:29:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2019-10-01 22:29:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 374. [2019-10-01 22:29:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2019-10-01 22:29:04,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 501 transitions. [2019-10-01 22:29:04,021 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 501 transitions. Word has length 70 [2019-10-01 22:29:04,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:04,022 INFO L475 AbstractCegarLoop]: Abstraction has 374 states and 501 transitions. [2019-10-01 22:29:04,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-01 22:29:04,022 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 501 transitions. [2019-10-01 22:29:04,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-01 22:29:04,023 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:04,023 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:04,023 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:04,023 INFO L82 PathProgramCache]: Analyzing trace with hash 544662457, now seen corresponding path program 1 times [2019-10-01 22:29:04,024 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:04,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:04,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:04,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:29:04,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-01 22:29:04,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:04,179 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:04,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:29:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:04,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-01 22:29:04,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-01 22:29:04,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:04,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2019-10-01 22:29:04,441 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-01 22:29:04,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-01 22:29:04,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-10-01 22:29:04,442 INFO L87 Difference]: Start difference. First operand 374 states and 501 transitions. Second operand 26 states. [2019-10-01 22:29:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:07,716 INFO L93 Difference]: Finished difference Result 842 states and 1164 transitions. [2019-10-01 22:29:07,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-10-01 22:29:07,717 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2019-10-01 22:29:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:07,721 INFO L225 Difference]: With dead ends: 842 [2019-10-01 22:29:07,721 INFO L226 Difference]: Without dead ends: 493 [2019-10-01 22:29:07,729 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3690 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3970, Invalid=8240, Unknown=0, NotChecked=0, Total=12210 [2019-10-01 22:29:07,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2019-10-01 22:29:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 455. [2019-10-01 22:29:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2019-10-01 22:29:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 610 transitions. [2019-10-01 22:29:07,748 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 610 transitions. Word has length 73 [2019-10-01 22:29:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:07,749 INFO L475 AbstractCegarLoop]: Abstraction has 455 states and 610 transitions. [2019-10-01 22:29:07,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-01 22:29:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 610 transitions. [2019-10-01 22:29:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-01 22:29:07,753 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:07,753 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:07,753 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash -742756530, now seen corresponding path program 2 times [2019-10-01 22:29:07,754 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:07,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:07,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:07,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:29:07,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-01 22:29:07,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:07,973 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:08,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:29:08,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:29:08,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:29:08,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-01 22:29:08,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-10-01 22:29:08,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:08,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2019-10-01 22:29:08,282 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-01 22:29:08,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-01 22:29:08,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-10-01 22:29:08,283 INFO L87 Difference]: Start difference. First operand 455 states and 610 transitions. Second operand 28 states. [2019-10-01 22:29:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:11,544 INFO L93 Difference]: Finished difference Result 983 states and 1348 transitions. [2019-10-01 22:29:11,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-10-01 22:29:11,544 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 78 [2019-10-01 22:29:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:11,548 INFO L225 Difference]: With dead ends: 983 [2019-10-01 22:29:11,548 INFO L226 Difference]: Without dead ends: 555 [2019-10-01 22:29:11,554 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4994 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5207, Invalid=10795, Unknown=0, NotChecked=0, Total=16002 [2019-10-01 22:29:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2019-10-01 22:29:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 515. [2019-10-01 22:29:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2019-10-01 22:29:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 691 transitions. [2019-10-01 22:29:11,574 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 691 transitions. Word has length 78 [2019-10-01 22:29:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:11,575 INFO L475 AbstractCegarLoop]: Abstraction has 515 states and 691 transitions. [2019-10-01 22:29:11,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-01 22:29:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 691 transitions. [2019-10-01 22:29:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-01 22:29:11,576 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:11,576 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 13, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:11,576 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1419763947, now seen corresponding path program 3 times [2019-10-01 22:29:11,577 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:11,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:11,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:11,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:29:11,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-01 22:29:11,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:11,784 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:11,847 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:29:12,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-01 22:29:12,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:29:12,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-01 22:29:12,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:29:12,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:12,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2019-10-01 22:29:12,277 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-01 22:29:12,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-01 22:29:12,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-10-01 22:29:12,278 INFO L87 Difference]: Start difference. First operand 515 states and 691 transitions. Second operand 30 states. [2019-10-01 22:29:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:15,974 INFO L93 Difference]: Finished difference Result 1106 states and 1516 transitions. [2019-10-01 22:29:15,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2019-10-01 22:29:15,979 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2019-10-01 22:29:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:15,983 INFO L225 Difference]: With dead ends: 1106 [2019-10-01 22:29:15,983 INFO L226 Difference]: Without dead ends: 620 [2019-10-01 22:29:15,988 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6609 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6707, Invalid=13885, Unknown=0, NotChecked=0, Total=20592 [2019-10-01 22:29:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2019-10-01 22:29:16,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 578. [2019-10-01 22:29:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 578 states. [2019-10-01 22:29:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 776 transitions. [2019-10-01 22:29:16,009 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 776 transitions. Word has length 83 [2019-10-01 22:29:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:16,009 INFO L475 AbstractCegarLoop]: Abstraction has 578 states and 776 transitions. [2019-10-01 22:29:16,009 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-01 22:29:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 776 transitions. [2019-10-01 22:29:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-01 22:29:16,010 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:16,010 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:16,011 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:16,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:16,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1404472334, now seen corresponding path program 4 times [2019-10-01 22:29:16,011 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:16,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:16,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:16,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:29:16,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-01 22:29:16,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:16,215 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:16,278 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:29:16,344 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:29:16,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:29:16,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-01 22:29:16,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-01 22:29:16,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:16,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2019-10-01 22:29:16,565 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-01 22:29:16,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-01 22:29:16,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2019-10-01 22:29:16,566 INFO L87 Difference]: Start difference. First operand 578 states and 776 transitions. Second operand 32 states. [2019-10-01 22:29:21,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:21,476 INFO L93 Difference]: Finished difference Result 1235 states and 1692 transitions. [2019-10-01 22:29:21,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2019-10-01 22:29:21,476 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 88 [2019-10-01 22:29:21,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:21,481 INFO L225 Difference]: With dead ends: 1235 [2019-10-01 22:29:21,481 INFO L226 Difference]: Without dead ends: 688 [2019-10-01 22:29:21,485 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8580 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8504, Invalid=17578, Unknown=0, NotChecked=0, Total=26082 [2019-10-01 22:29:21,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-10-01 22:29:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 644. [2019-10-01 22:29:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2019-10-01 22:29:21,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 865 transitions. [2019-10-01 22:29:21,512 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 865 transitions. Word has length 88 [2019-10-01 22:29:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:21,513 INFO L475 AbstractCegarLoop]: Abstraction has 644 states and 865 transitions. [2019-10-01 22:29:21,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-01 22:29:21,513 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 865 transitions. [2019-10-01 22:29:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-01 22:29:21,514 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:21,514 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 15, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:21,514 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:21,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1250249329, now seen corresponding path program 5 times [2019-10-01 22:29:21,515 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:21,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:21,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:21,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:29:21,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-01 22:29:21,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:21,750 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:21,806 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:29:22,012 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-01 22:29:22,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:29:22,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-01 22:29:22,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-10-01 22:29:22,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:22,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2019-10-01 22:29:22,230 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-01 22:29:22,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-01 22:29:22,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-10-01 22:29:22,231 INFO L87 Difference]: Start difference. First operand 644 states and 865 transitions. Second operand 34 states. [2019-10-01 22:29:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:27,567 INFO L93 Difference]: Finished difference Result 1370 states and 1876 transitions. [2019-10-01 22:29:27,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2019-10-01 22:29:27,567 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 93 [2019-10-01 22:29:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:27,571 INFO L225 Difference]: With dead ends: 1370 [2019-10-01 22:29:27,571 INFO L226 Difference]: Without dead ends: 759 [2019-10-01 22:29:27,577 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10955 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=10634, Invalid=21946, Unknown=0, NotChecked=0, Total=32580 [2019-10-01 22:29:27,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2019-10-01 22:29:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 713. [2019-10-01 22:29:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2019-10-01 22:29:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 958 transitions. [2019-10-01 22:29:27,605 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 958 transitions. Word has length 93 [2019-10-01 22:29:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:27,605 INFO L475 AbstractCegarLoop]: Abstraction has 713 states and 958 transitions. [2019-10-01 22:29:27,606 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-01 22:29:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 958 transitions. [2019-10-01 22:29:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-01 22:29:27,610 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:27,610 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 16, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:27,610 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:27,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:27,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1191991146, now seen corresponding path program 6 times [2019-10-01 22:29:27,611 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:27,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:27,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:27,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:29:27,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-01 22:29:27,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:27,832 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:27,898 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:29:28,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-10-01 22:29:28,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:29:28,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-01 22:29:28,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-10-01 22:29:28,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:28,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2019-10-01 22:29:28,481 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-01 22:29:28,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-01 22:29:28,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-10-01 22:29:28,482 INFO L87 Difference]: Start difference. First operand 713 states and 958 transitions. Second operand 36 states. [2019-10-01 22:29:34,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:34,880 INFO L93 Difference]: Finished difference Result 1511 states and 2068 transitions. [2019-10-01 22:29:34,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2019-10-01 22:29:34,881 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 98 [2019-10-01 22:29:34,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:34,884 INFO L225 Difference]: With dead ends: 1511 [2019-10-01 22:29:34,884 INFO L226 Difference]: Without dead ends: 833 [2019-10-01 22:29:34,890 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13785 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=13135, Invalid=27065, Unknown=0, NotChecked=0, Total=40200 [2019-10-01 22:29:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2019-10-01 22:29:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 785. [2019-10-01 22:29:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2019-10-01 22:29:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1055 transitions. [2019-10-01 22:29:34,917 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1055 transitions. Word has length 98 [2019-10-01 22:29:34,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:34,917 INFO L475 AbstractCegarLoop]: Abstraction has 785 states and 1055 transitions. [2019-10-01 22:29:34,917 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-01 22:29:34,917 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1055 transitions. [2019-10-01 22:29:34,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-01 22:29:34,918 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:34,919 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 17, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:34,919 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:34,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:34,919 INFO L82 PathProgramCache]: Analyzing trace with hash -845666867, now seen corresponding path program 7 times [2019-10-01 22:29:34,919 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:34,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:34,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:34,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:29:34,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:34,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-10-01 22:29:35,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:35,177 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:35,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:29:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:35,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-01 22:29:35,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (19)] Exception during sending of exit command (exit): Broken pipe [2019-10-01 22:29:35,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:35,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 38 [2019-10-01 22:29:35,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-01 22:29:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-01 22:29:35,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-10-01 22:29:35,550 INFO L87 Difference]: Start difference. First operand 785 states and 1055 transitions. Second operand 38 states. [2019-10-01 22:29:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:43,406 INFO L93 Difference]: Finished difference Result 1658 states and 2268 transitions. [2019-10-01 22:29:43,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2019-10-01 22:29:43,406 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 103 [2019-10-01 22:29:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:43,410 INFO L225 Difference]: With dead ends: 1658 [2019-10-01 22:29:43,410 INFO L226 Difference]: Without dead ends: 910 [2019-10-01 22:29:43,415 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17124 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=16047, Invalid=33015, Unknown=0, NotChecked=0, Total=49062 [2019-10-01 22:29:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2019-10-01 22:29:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 860. [2019-10-01 22:29:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2019-10-01 22:29:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1156 transitions. [2019-10-01 22:29:43,447 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1156 transitions. Word has length 103 [2019-10-01 22:29:43,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:43,448 INFO L475 AbstractCegarLoop]: Abstraction has 860 states and 1156 transitions. [2019-10-01 22:29:43,448 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-01 22:29:43,448 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1156 transitions. [2019-10-01 22:29:43,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-01 22:29:43,449 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:43,449 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 18, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:43,449 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:43,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:43,450 INFO L82 PathProgramCache]: Analyzing trace with hash 768036154, now seen corresponding path program 8 times [2019-10-01 22:29:43,450 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:43,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:43,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:43,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:29:43,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-10-01 22:29:43,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:43,763 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:43,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:29:43,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:29:43,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:29:43,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-01 22:29:43,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-10-01 22:29:44,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:44,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 40 [2019-10-01 22:29:44,346 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-01 22:29:44,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-01 22:29:44,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1140, Unknown=0, NotChecked=0, Total=1560 [2019-10-01 22:29:44,347 INFO L87 Difference]: Start difference. First operand 860 states and 1156 transitions. Second operand 40 states. [2019-10-01 22:29:53,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:29:53,857 INFO L93 Difference]: Finished difference Result 1811 states and 2476 transitions. [2019-10-01 22:29:53,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2019-10-01 22:29:53,859 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 108 [2019-10-01 22:29:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:29:53,862 INFO L225 Difference]: With dead ends: 1811 [2019-10-01 22:29:53,862 INFO L226 Difference]: Without dead ends: 990 [2019-10-01 22:29:53,867 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21029 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=19412, Invalid=39880, Unknown=0, NotChecked=0, Total=59292 [2019-10-01 22:29:53,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2019-10-01 22:29:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 938. [2019-10-01 22:29:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2019-10-01 22:29:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1261 transitions. [2019-10-01 22:29:53,900 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1261 transitions. Word has length 108 [2019-10-01 22:29:53,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:29:53,900 INFO L475 AbstractCegarLoop]: Abstraction has 938 states and 1261 transitions. [2019-10-01 22:29:53,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-01 22:29:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1261 transitions. [2019-10-01 22:29:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-01 22:29:53,901 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:29:53,902 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 19, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:29:53,902 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:29:53,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:29:53,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1942647081, now seen corresponding path program 9 times [2019-10-01 22:29:53,903 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:29:53,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:29:53,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:53,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:29:53,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:29:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:29:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-01 22:29:54,206 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:29:54,206 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:29:54,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:29:54,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-01 22:29:54,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:29:54,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-01 22:29:54,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:29:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2019-10-01 22:29:55,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:29:55,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 42 [2019-10-01 22:29:55,266 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-01 22:29:55,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-01 22:29:55,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1260, Unknown=0, NotChecked=0, Total=1722 [2019-10-01 22:29:55,267 INFO L87 Difference]: Start difference. First operand 938 states and 1261 transitions. Second operand 42 states. [2019-10-01 22:30:06,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:06,524 INFO L93 Difference]: Finished difference Result 1970 states and 2692 transitions. [2019-10-01 22:30:06,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2019-10-01 22:30:06,525 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 113 [2019-10-01 22:30:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:06,530 INFO L225 Difference]: With dead ends: 1970 [2019-10-01 22:30:06,530 INFO L226 Difference]: Without dead ends: 1073 [2019-10-01 22:30:06,538 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=23274, Invalid=47748, Unknown=0, NotChecked=0, Total=71022 [2019-10-01 22:30:06,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2019-10-01 22:30:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1019. [2019-10-01 22:30:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-10-01 22:30:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1370 transitions. [2019-10-01 22:30:06,582 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1370 transitions. Word has length 113 [2019-10-01 22:30:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:06,582 INFO L475 AbstractCegarLoop]: Abstraction has 1019 states and 1370 transitions. [2019-10-01 22:30:06,582 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-01 22:30:06,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1370 transitions. [2019-10-01 22:30:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-01 22:30:06,584 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:06,584 INFO L411 BasicCegarLoop]: trace histogram [21, 21, 20, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:06,585 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:06,585 INFO L82 PathProgramCache]: Analyzing trace with hash -514678306, now seen corresponding path program 10 times [2019-10-01 22:30:06,585 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:06,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:06,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:06,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:06,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-10-01 22:30:06,917 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:06,917 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:07,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:30:07,092 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:30:07,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:07,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-01 22:30:07,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-10-01 22:30:07,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:07,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 44 [2019-10-01 22:30:07,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-01 22:30:07,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-01 22:30:07,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-10-01 22:30:07,424 INFO L87 Difference]: Start difference. First operand 1019 states and 1370 transitions. Second operand 44 states. [2019-10-01 22:30:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:20,507 INFO L93 Difference]: Finished difference Result 2135 states and 2916 transitions. [2019-10-01 22:30:20,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 268 states. [2019-10-01 22:30:20,508 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 118 [2019-10-01 22:30:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:20,512 INFO L225 Difference]: With dead ends: 2135 [2019-10-01 22:30:20,512 INFO L226 Difference]: Without dead ends: 1159 [2019-10-01 22:30:20,517 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30780 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=27679, Invalid=56711, Unknown=0, NotChecked=0, Total=84390 [2019-10-01 22:30:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2019-10-01 22:30:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1103. [2019-10-01 22:30:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2019-10-01 22:30:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1483 transitions. [2019-10-01 22:30:20,555 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1483 transitions. Word has length 118 [2019-10-01 22:30:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:20,555 INFO L475 AbstractCegarLoop]: Abstraction has 1103 states and 1483 transitions. [2019-10-01 22:30:20,555 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-01 22:30:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1483 transitions. [2019-10-01 22:30:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-01 22:30:20,557 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:20,558 INFO L411 BasicCegarLoop]: trace histogram [22, 22, 21, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:20,558 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:20,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:20,558 INFO L82 PathProgramCache]: Analyzing trace with hash -942805883, now seen corresponding path program 11 times [2019-10-01 22:30:20,558 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:20,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:20,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:20,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:20,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-10-01 22:30:20,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:20,901 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:21,171 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:30:22,543 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-01 22:30:22,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:22,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-01 22:30:22,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-10-01 22:30:22,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:22,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 46 [2019-10-01 22:30:22,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-01 22:30:22,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-01 22:30:22,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-10-01 22:30:22,910 INFO L87 Difference]: Start difference. First operand 1103 states and 1483 transitions. Second operand 46 states. [2019-10-01 22:30:37,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:37,982 INFO L93 Difference]: Finished difference Result 2306 states and 3148 transitions. [2019-10-01 22:30:37,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 292 states. [2019-10-01 22:30:37,982 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 123 [2019-10-01 22:30:37,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:37,986 INFO L225 Difference]: With dead ends: 2306 [2019-10-01 22:30:37,986 INFO L226 Difference]: Without dead ends: 1248 [2019-10-01 22:30:37,991 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36755 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=32675, Invalid=66865, Unknown=0, NotChecked=0, Total=99540 [2019-10-01 22:30:37,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2019-10-01 22:30:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1190. [2019-10-01 22:30:38,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2019-10-01 22:30:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1600 transitions. [2019-10-01 22:30:38,031 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1600 transitions. Word has length 123 [2019-10-01 22:30:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:38,031 INFO L475 AbstractCegarLoop]: Abstraction has 1190 states and 1600 transitions. [2019-10-01 22:30:38,031 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-01 22:30:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1600 transitions. [2019-10-01 22:30:38,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-01 22:30:38,033 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:38,033 INFO L411 BasicCegarLoop]: trace histogram [23, 23, 22, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:38,033 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:38,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:38,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1889789570, now seen corresponding path program 12 times [2019-10-01 22:30:38,034 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:38,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:38,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:38,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:38,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-01 22:30:38,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:38,436 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:38,603 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:30:40,145 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-10-01 22:30:40,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:30:40,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-01 22:30:40,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:40,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-10-01 22:30:40,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:40,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 48 [2019-10-01 22:30:40,554 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-10-01 22:30:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-10-01 22:30:40,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2019-10-01 22:30:40,555 INFO L87 Difference]: Start difference. First operand 1190 states and 1600 transitions. Second operand 48 states. [2019-10-01 22:30:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:30:57,875 INFO L93 Difference]: Finished difference Result 2483 states and 3388 transitions. [2019-10-01 22:30:57,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2019-10-01 22:30:57,875 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 128 [2019-10-01 22:30:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:30:57,880 INFO L225 Difference]: With dead ends: 2483 [2019-10-01 22:30:57,880 INFO L226 Difference]: Without dead ends: 1340 [2019-10-01 22:30:57,887 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43554 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=38312, Invalid=78310, Unknown=0, NotChecked=0, Total=116622 [2019-10-01 22:30:57,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2019-10-01 22:30:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1280. [2019-10-01 22:30:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1280 states. [2019-10-01 22:30:57,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1721 transitions. [2019-10-01 22:30:57,932 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1721 transitions. Word has length 128 [2019-10-01 22:30:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:30:57,933 INFO L475 AbstractCegarLoop]: Abstraction has 1280 states and 1721 transitions. [2019-10-01 22:30:57,933 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-10-01 22:30:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1721 transitions. [2019-10-01 22:30:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-01 22:30:57,934 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:30:57,934 INFO L411 BasicCegarLoop]: trace histogram [24, 24, 23, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:30:57,935 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:30:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:30:57,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2077513697, now seen corresponding path program 13 times [2019-10-01 22:30:57,935 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:30:57,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:30:57,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:57,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:30:57,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:30:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:58,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-01 22:30:58,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:30:58,343 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:30:58,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:30:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:30:58,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-01 22:30:58,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:30:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1293 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2019-10-01 22:30:58,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:30:58,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2019-10-01 22:30:58,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-01 22:30:58,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-01 22:30:58,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=1800, Unknown=0, NotChecked=0, Total=2450 [2019-10-01 22:30:58,998 INFO L87 Difference]: Start difference. First operand 1280 states and 1721 transitions. Second operand 50 states. [2019-10-01 22:31:19,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:31:19,312 INFO L93 Difference]: Finished difference Result 2666 states and 3636 transitions. [2019-10-01 22:31:19,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 343 states. [2019-10-01 22:31:19,312 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 133 [2019-10-01 22:31:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:31:19,317 INFO L225 Difference]: With dead ends: 2666 [2019-10-01 22:31:19,318 INFO L226 Difference]: Without dead ends: 1435 [2019-10-01 22:31:19,324 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51249 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=44642, Invalid=91150, Unknown=0, NotChecked=0, Total=135792 [2019-10-01 22:31:19,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2019-10-01 22:31:19,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1373. [2019-10-01 22:31:19,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1373 states. [2019-10-01 22:31:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 1846 transitions. [2019-10-01 22:31:19,373 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 1846 transitions. Word has length 133 [2019-10-01 22:31:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:31:19,373 INFO L475 AbstractCegarLoop]: Abstraction has 1373 states and 1846 transitions. [2019-10-01 22:31:19,373 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-01 22:31:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 1846 transitions. [2019-10-01 22:31:19,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-01 22:31:19,375 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:31:19,375 INFO L411 BasicCegarLoop]: trace histogram [25, 25, 24, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:31:19,375 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:31:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:31:19,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1665751846, now seen corresponding path program 14 times [2019-10-01 22:31:19,376 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:31:19,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:31:19,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:31:19,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:31:19,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:31:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:31:19,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-10-01 22:31:19,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:31:19,760 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:31:19,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:31:20,011 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:31:20,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:31:20,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-01 22:31:20,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:31:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-10-01 22:31:20,563 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:31:20,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 52 [2019-10-01 22:31:20,563 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-10-01 22:31:20,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-10-01 22:31:20,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-10-01 22:31:20,564 INFO L87 Difference]: Start difference. First operand 1373 states and 1846 transitions. Second operand 52 states. [2019-10-01 22:31:43,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:31:43,513 INFO L93 Difference]: Finished difference Result 2855 states and 3892 transitions. [2019-10-01 22:31:43,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 370 states. [2019-10-01 22:31:43,514 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 138 [2019-10-01 22:31:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:31:43,519 INFO L225 Difference]: With dead ends: 2855 [2019-10-01 22:31:43,519 INFO L226 Difference]: Without dead ends: 1533 [2019-10-01 22:31:43,526 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 395 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59915 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=51719, Invalid=105493, Unknown=0, NotChecked=0, Total=157212 [2019-10-01 22:31:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2019-10-01 22:31:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1469. [2019-10-01 22:31:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2019-10-01 22:31:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 1975 transitions. [2019-10-01 22:31:43,577 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 1975 transitions. Word has length 138 [2019-10-01 22:31:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:31:43,578 INFO L475 AbstractCegarLoop]: Abstraction has 1469 states and 1975 transitions. [2019-10-01 22:31:43,578 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-10-01 22:31:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 1975 transitions. [2019-10-01 22:31:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-01 22:31:43,580 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:31:43,580 INFO L411 BasicCegarLoop]: trace histogram [26, 26, 25, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:31:43,580 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:31:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:31:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1167029053, now seen corresponding path program 15 times [2019-10-01 22:31:43,581 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:31:43,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:31:43,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:31:43,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:31:43,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:31:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:31:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-10-01 22:31:44,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:31:44,082 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:31:44,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:31:46,821 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-01 22:31:46,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:31:46,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-01 22:31:46,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:31:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1530 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2019-10-01 22:31:47,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:31:47,345 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 54 [2019-10-01 22:31:47,345 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-01 22:31:47,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-01 22:31:47,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-10-01 22:31:47,346 INFO L87 Difference]: Start difference. First operand 1469 states and 1975 transitions. Second operand 54 states. [2019-10-01 22:32:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:32:13,887 INFO L93 Difference]: Finished difference Result 3050 states and 4156 transitions. [2019-10-01 22:32:13,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 398 states. [2019-10-01 22:32:13,888 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 143 [2019-10-01 22:32:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:32:13,893 INFO L225 Difference]: With dead ends: 3050 [2019-10-01 22:32:13,893 INFO L226 Difference]: Without dead ends: 1634 [2019-10-01 22:32:13,902 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 424 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69630 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=59599, Invalid=121451, Unknown=0, NotChecked=0, Total=181050 [2019-10-01 22:32:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2019-10-01 22:32:13,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1568. [2019-10-01 22:32:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1568 states. [2019-10-01 22:32:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 2108 transitions. [2019-10-01 22:32:13,959 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 2108 transitions. Word has length 143 [2019-10-01 22:32:13,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:32:13,960 INFO L475 AbstractCegarLoop]: Abstraction has 1568 states and 2108 transitions. [2019-10-01 22:32:13,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-01 22:32:13,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 2108 transitions. [2019-10-01 22:32:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-01 22:32:13,961 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:32:13,961 INFO L411 BasicCegarLoop]: trace histogram [27, 27, 26, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:32:13,962 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:32:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:32:13,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1330724810, now seen corresponding path program 16 times [2019-10-01 22:32:13,962 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:32:13,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:32:13,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:13,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:32:13,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:32:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-10-01 22:32:14,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:32:14,396 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:32:14,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:32:14,677 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:32:14,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:32:14,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-01 22:32:14,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:32:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2019-10-01 22:32:15,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:32:15,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 56 [2019-10-01 22:32:15,218 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-01 22:32:15,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-01 22:32:15,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2019-10-01 22:32:15,219 INFO L87 Difference]: Start difference. First operand 1568 states and 2108 transitions. Second operand 56 states. [2019-10-01 22:32:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:32:45,696 INFO L93 Difference]: Finished difference Result 3251 states and 4428 transitions. [2019-10-01 22:32:45,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 427 states. [2019-10-01 22:32:45,696 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 148 [2019-10-01 22:32:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:32:45,702 INFO L225 Difference]: With dead ends: 3251 [2019-10-01 22:32:45,702 INFO L226 Difference]: Without dead ends: 1738 [2019-10-01 22:32:45,711 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 454 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80475 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=68340, Invalid=139140, Unknown=0, NotChecked=0, Total=207480 [2019-10-01 22:32:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2019-10-01 22:32:45,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1670. [2019-10-01 22:32:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1670 states. [2019-10-01 22:32:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2245 transitions. [2019-10-01 22:32:45,760 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2245 transitions. Word has length 148 [2019-10-01 22:32:45,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:32:45,761 INFO L475 AbstractCegarLoop]: Abstraction has 1670 states and 2245 transitions. [2019-10-01 22:32:45,761 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-01 22:32:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2245 transitions. [2019-10-01 22:32:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-01 22:32:45,762 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:32:45,763 INFO L411 BasicCegarLoop]: trace histogram [28, 28, 27, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:32:45,763 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:32:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:32:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1171194215, now seen corresponding path program 17 times [2019-10-01 22:32:45,763 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:32:45,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:32:45,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:45,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:32:45,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:32:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:32:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-10-01 22:32:46,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:32:46,196 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:32:46,418 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:32:50,763 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-10-01 22:32:50,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:32:50,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-01 22:32:50,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:32:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1787 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2019-10-01 22:32:51,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:32:51,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 58 [2019-10-01 22:32:51,431 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-01 22:32:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-01 22:32:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=2436, Unknown=0, NotChecked=0, Total=3306 [2019-10-01 22:32:51,432 INFO L87 Difference]: Start difference. First operand 1670 states and 2245 transitions. Second operand 58 states. [2019-10-01 22:33:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:33:26,831 INFO L93 Difference]: Finished difference Result 3458 states and 4708 transitions. [2019-10-01 22:33:26,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 457 states. [2019-10-01 22:33:26,832 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 153 [2019-10-01 22:33:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:33:26,838 INFO L225 Difference]: With dead ends: 3458 [2019-10-01 22:33:26,838 INFO L226 Difference]: Without dead ends: 1845 [2019-10-01 22:33:26,847 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92534 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=78002, Invalid=158680, Unknown=0, NotChecked=0, Total=236682 [2019-10-01 22:33:26,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2019-10-01 22:33:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1775. [2019-10-01 22:33:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1775 states. [2019-10-01 22:33:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1775 states to 1775 states and 2386 transitions. [2019-10-01 22:33:26,897 INFO L78 Accepts]: Start accepts. Automaton has 1775 states and 2386 transitions. Word has length 153 [2019-10-01 22:33:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:33:26,897 INFO L475 AbstractCegarLoop]: Abstraction has 1775 states and 2386 transitions. [2019-10-01 22:33:26,897 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-01 22:33:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1775 states and 2386 transitions. [2019-10-01 22:33:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-01 22:33:26,898 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:33:26,898 INFO L411 BasicCegarLoop]: trace histogram [29, 29, 28, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:33:26,898 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:33:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:33:26,899 INFO L82 PathProgramCache]: Analyzing trace with hash -45493138, now seen corresponding path program 18 times [2019-10-01 22:33:26,899 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:33:26,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:33:26,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:33:26,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:33:26,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:33:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:33:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2019-10-01 22:33:27,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:33:27,471 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:33:27,756 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:33:34,316 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2019-10-01 22:33:34,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:33:34,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-01 22:33:34,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:33:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1923 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2019-10-01 22:33:35,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:33:35,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29] total 60 [2019-10-01 22:33:35,045 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-10-01 22:33:35,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-10-01 22:33:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-10-01 22:33:35,046 INFO L87 Difference]: Start difference. First operand 1775 states and 2386 transitions. Second operand 60 states. [2019-10-01 22:34:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:34:14,257 INFO L93 Difference]: Finished difference Result 3671 states and 4996 transitions. [2019-10-01 22:34:14,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 488 states. [2019-10-01 22:34:14,258 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 158 [2019-10-01 22:34:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:34:14,264 INFO L225 Difference]: With dead ends: 3671 [2019-10-01 22:34:14,264 INFO L226 Difference]: Without dead ends: 1955 [2019-10-01 22:34:14,277 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 517 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105894 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=88647, Invalid=180195, Unknown=0, NotChecked=0, Total=268842 [2019-10-01 22:34:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2019-10-01 22:34:14,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1883. [2019-10-01 22:34:14,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1883 states. [2019-10-01 22:34:14,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 2531 transitions. [2019-10-01 22:34:14,329 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 2531 transitions. Word has length 158 [2019-10-01 22:34:14,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:34:14,329 INFO L475 AbstractCegarLoop]: Abstraction has 1883 states and 2531 transitions. [2019-10-01 22:34:14,330 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-10-01 22:34:14,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 2531 transitions. [2019-10-01 22:34:14,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-01 22:34:14,331 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:34:14,331 INFO L411 BasicCegarLoop]: trace histogram [30, 30, 29, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:34:14,331 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:34:14,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:34:14,331 INFO L82 PathProgramCache]: Analyzing trace with hash 711637493, now seen corresponding path program 19 times [2019-10-01 22:34:14,331 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:34:14,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:34:14,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:34:14,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:34:14,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:34:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:34:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2064 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-10-01 22:34:15,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:34:15,065 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:34:15,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:34:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:34:15,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-01 22:34:15,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:34:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2064 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2019-10-01 22:34:16,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:34:16,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30] total 62 [2019-10-01 22:34:16,079 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-10-01 22:34:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-10-01 22:34:16,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-10-01 22:34:16,080 INFO L87 Difference]: Start difference. First operand 1883 states and 2531 transitions. Second operand 62 states. [2019-10-01 22:35:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:35:00,386 INFO L93 Difference]: Finished difference Result 3890 states and 5292 transitions. [2019-10-01 22:35:00,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 520 states. [2019-10-01 22:35:00,387 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 163 [2019-10-01 22:35:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:35:00,395 INFO L225 Difference]: With dead ends: 3890 [2019-10-01 22:35:00,395 INFO L226 Difference]: Without dead ends: 2068 [2019-10-01 22:35:00,410 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120645 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=100339, Invalid=203813, Unknown=0, NotChecked=0, Total=304152 [2019-10-01 22:35:00,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2019-10-01 22:35:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1994. [2019-10-01 22:35:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1994 states. [2019-10-01 22:35:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 2680 transitions. [2019-10-01 22:35:00,461 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 2680 transitions. Word has length 163 [2019-10-01 22:35:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:35:00,462 INFO L475 AbstractCegarLoop]: Abstraction has 1994 states and 2680 transitions. [2019-10-01 22:35:00,462 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-10-01 22:35:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 2680 transitions. [2019-10-01 22:35:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-01 22:35:00,463 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:35:00,463 INFO L411 BasicCegarLoop]: trace histogram [31, 31, 30, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:35:00,463 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:35:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:35:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1941874414, now seen corresponding path program 20 times [2019-10-01 22:35:00,463 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:35:00,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:35:00,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:00,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:35:00,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:35:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2019-10-01 22:35:01,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:35:01,073 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:35:01,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-10-01 22:35:01,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-01 22:35:01,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:35:01,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-01 22:35:01,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:35:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2210 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2019-10-01 22:35:02,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:35:02,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31] total 64 [2019-10-01 22:35:02,241 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-10-01 22:35:02,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-10-01 22:35:02,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=2976, Unknown=0, NotChecked=0, Total=4032 [2019-10-01 22:35:02,242 INFO L87 Difference]: Start difference. First operand 1994 states and 2680 transitions. Second operand 64 states. [2019-10-01 22:35:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:35:52,135 INFO L93 Difference]: Finished difference Result 4115 states and 5596 transitions. [2019-10-01 22:35:52,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 553 states. [2019-10-01 22:35:52,135 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 168 [2019-10-01 22:35:52,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:35:52,144 INFO L225 Difference]: With dead ends: 4115 [2019-10-01 22:35:52,144 INFO L226 Difference]: Without dead ends: 2184 [2019-10-01 22:35:52,159 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 584 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136880 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=113144, Invalid=229666, Unknown=0, NotChecked=0, Total=342810 [2019-10-01 22:35:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2019-10-01 22:35:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2108. [2019-10-01 22:35:52,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2108 states. [2019-10-01 22:35:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 2833 transitions. [2019-10-01 22:35:52,219 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 2833 transitions. Word has length 168 [2019-10-01 22:35:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:35:52,219 INFO L475 AbstractCegarLoop]: Abstraction has 2108 states and 2833 transitions. [2019-10-01 22:35:52,219 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-10-01 22:35:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 2833 transitions. [2019-10-01 22:35:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-01 22:35:52,220 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:35:52,220 INFO L411 BasicCegarLoop]: trace histogram [32, 32, 31, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:35:52,220 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:35:52,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:35:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2121164113, now seen corresponding path program 21 times [2019-10-01 22:35:52,221 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:35:52,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:35:52,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:52,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:35:52,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:35:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:35:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2361 backedges. 0 proven. 1520 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-10-01 22:35:52,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:35:52,865 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:35:53,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-10-01 22:35:58,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-10-01 22:35:58,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:35:58,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-01 22:35:58,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:35:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2361 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-10-01 22:35:59,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:35:59,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32] total 66 [2019-10-01 22:35:59,305 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-10-01 22:35:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-10-01 22:35:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=3168, Unknown=0, NotChecked=0, Total=4290 [2019-10-01 22:35:59,306 INFO L87 Difference]: Start difference. First operand 2108 states and 2833 transitions. Second operand 66 states. [2019-10-01 22:36:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:36:54,576 INFO L93 Difference]: Finished difference Result 4346 states and 5908 transitions. [2019-10-01 22:36:54,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 587 states. [2019-10-01 22:36:54,577 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 173 [2019-10-01 22:36:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:36:54,583 INFO L225 Difference]: With dead ends: 4346 [2019-10-01 22:36:54,583 INFO L226 Difference]: Without dead ends: 2303 [2019-10-01 22:36:54,604 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 619 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154695 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=127130, Invalid=257890, Unknown=0, NotChecked=0, Total=385020 [2019-10-01 22:36:54,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2019-10-01 22:36:54,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2225. [2019-10-01 22:36:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2225 states. [2019-10-01 22:36:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2225 states to 2225 states and 2990 transitions. [2019-10-01 22:36:54,671 INFO L78 Accepts]: Start accepts. Automaton has 2225 states and 2990 transitions. Word has length 173 [2019-10-01 22:36:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:36:54,672 INFO L475 AbstractCegarLoop]: Abstraction has 2225 states and 2990 transitions. [2019-10-01 22:36:54,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-10-01 22:36:54,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2225 states and 2990 transitions. [2019-10-01 22:36:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-01 22:36:54,673 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:36:54,673 INFO L411 BasicCegarLoop]: trace histogram [33, 33, 32, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:36:54,673 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:36:54,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:36:54,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1782182474, now seen corresponding path program 22 times [2019-10-01 22:36:54,674 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:36:54,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:36:54,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:36:54,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:36:54,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:36:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:36:55,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-10-01 22:36:55,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:36:55,370 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:36:55,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-10-01 22:36:55,804 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-01 22:36:55,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:36:55,806 INFO L256 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-01 22:36:55,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:36:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2019-10-01 22:36:56,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:36:56,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33] total 68 [2019-10-01 22:36:56,629 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-10-01 22:36:56,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-10-01 22:36:56,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=3366, Unknown=0, NotChecked=0, Total=4556 [2019-10-01 22:36:56,630 INFO L87 Difference]: Start difference. First operand 2225 states and 2990 transitions. Second operand 68 states. [2019-10-01 22:37:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:37:58,315 INFO L93 Difference]: Finished difference Result 4583 states and 6228 transitions. [2019-10-01 22:37:58,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 622 states. [2019-10-01 22:37:58,315 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 178 [2019-10-01 22:37:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:37:58,320 INFO L225 Difference]: With dead ends: 4583 [2019-10-01 22:37:58,320 INFO L226 Difference]: Without dead ends: 2425 [2019-10-01 22:37:58,335 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 655 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174189 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=142367, Invalid=288625, Unknown=0, NotChecked=0, Total=430992 [2019-10-01 22:37:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2019-10-01 22:37:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2345. [2019-10-01 22:37:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2345 states. [2019-10-01 22:37:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 3151 transitions. [2019-10-01 22:37:58,410 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 3151 transitions. Word has length 178 [2019-10-01 22:37:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:37:58,410 INFO L475 AbstractCegarLoop]: Abstraction has 2345 states and 3151 transitions. [2019-10-01 22:37:58,410 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-10-01 22:37:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 3151 transitions. [2019-10-01 22:37:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-01 22:37:58,411 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:37:58,411 INFO L411 BasicCegarLoop]: trace histogram [34, 34, 33, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:37:58,411 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:37:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:37:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash 300794029, now seen corresponding path program 23 times [2019-10-01 22:37:58,412 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:37:58,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:37:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:37:58,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:37:58,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:37:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:37:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1717 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-10-01 22:37:59,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:37:59,009 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:37:59,374 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-10-01 22:38:08,121 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2019-10-01 22:38:08,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:38:08,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-01 22:38:08,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:38:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2019-10-01 22:38:09,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:38:09,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34] total 70 [2019-10-01 22:38:09,033 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-01 22:38:09,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-01 22:38:09,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-10-01 22:38:09,034 INFO L87 Difference]: Start difference. First operand 2345 states and 3151 transitions. Second operand 70 states. [2019-10-01 22:39:18,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:39:18,041 INFO L93 Difference]: Finished difference Result 4826 states and 6556 transitions. [2019-10-01 22:39:18,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 658 states. [2019-10-01 22:39:18,042 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 183 [2019-10-01 22:39:18,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:39:18,047 INFO L225 Difference]: With dead ends: 4826 [2019-10-01 22:39:18,047 INFO L226 Difference]: Without dead ends: 2550 [2019-10-01 22:39:18,075 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 692 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195464 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=158927, Invalid=322015, Unknown=0, NotChecked=0, Total=480942 [2019-10-01 22:39:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2019-10-01 22:39:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2468. [2019-10-01 22:39:18,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2468 states. [2019-10-01 22:39:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 3316 transitions. [2019-10-01 22:39:18,228 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 3316 transitions. Word has length 183 [2019-10-01 22:39:18,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:39:18,229 INFO L475 AbstractCegarLoop]: Abstraction has 2468 states and 3316 transitions. [2019-10-01 22:39:18,229 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-01 22:39:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 3316 transitions. [2019-10-01 22:39:18,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2019-10-01 22:39:18,230 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:39:18,230 INFO L411 BasicCegarLoop]: trace histogram [35, 35, 34, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:39:18,230 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:39:18,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:39:18,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1374040666, now seen corresponding path program 24 times [2019-10-01 22:39:18,231 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:39:18,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:39:18,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:39:18,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:39:18,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:39:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:39:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1820 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2019-10-01 22:39:19,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:39:19,269 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:39:19,651 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-10-01 22:39:36,764 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2019-10-01 22:39:36,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-01 22:39:36,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-01 22:39:36,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:39:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2019-10-01 22:39:37,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:39:37,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 35] total 72 [2019-10-01 22:39:37,670 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-10-01 22:39:37,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-10-01 22:39:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=3780, Unknown=0, NotChecked=0, Total=5112 [2019-10-01 22:39:37,671 INFO L87 Difference]: Start difference. First operand 2468 states and 3316 transitions. Second operand 72 states. [2019-10-01 22:40:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-01 22:40:56,221 INFO L93 Difference]: Finished difference Result 5075 states and 6892 transitions. [2019-10-01 22:40:56,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 695 states. [2019-10-01 22:40:56,221 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 188 [2019-10-01 22:40:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-01 22:40:56,227 INFO L225 Difference]: With dead ends: 5075 [2019-10-01 22:40:56,227 INFO L226 Difference]: Without dead ends: 2678 [2019-10-01 22:40:56,256 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 730 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218625 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=176884, Invalid=358208, Unknown=0, NotChecked=0, Total=535092 [2019-10-01 22:40:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2678 states. [2019-10-01 22:40:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2678 to 2594. [2019-10-01 22:40:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2594 states. [2019-10-01 22:40:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 3485 transitions. [2019-10-01 22:40:56,413 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 3485 transitions. Word has length 188 [2019-10-01 22:40:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-01 22:40:56,414 INFO L475 AbstractCegarLoop]: Abstraction has 2594 states and 3485 transitions. [2019-10-01 22:40:56,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-10-01 22:40:56,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 3485 transitions. [2019-10-01 22:40:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-01 22:40:56,415 INFO L403 BasicCegarLoop]: Found error trace [2019-10-01 22:40:56,416 INFO L411 BasicCegarLoop]: trace histogram [36, 36, 35, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-01 22:40:56,416 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-01 22:40:56,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-01 22:40:56,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1877308407, now seen corresponding path program 25 times [2019-10-01 22:40:56,416 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-10-01 22:40:56,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-10-01 22:40:56,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:40:56,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-10-01 22:40:56,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-01 22:40:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:40:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-10-01 22:40:57,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-01 22:40:57,227 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-01 22:40:57,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-01 22:40:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-01 22:40:57,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-01 22:40:57,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-01 22:40:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2019-10-01 22:40:59,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-01 22:40:59,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 36] total 74 [2019-10-01 22:40:59,118 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-10-01 22:40:59,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-10-01 22:40:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1406, Invalid=3996, Unknown=0, NotChecked=0, Total=5402 [2019-10-01 22:40:59,119 INFO L87 Difference]: Start difference. First operand 2594 states and 3485 transitions. Second operand 74 states.