java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 10:06:09,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 10:06:09,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 10:06:09,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 10:06:09,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 10:06:09,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 10:06:09,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 10:06:09,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 10:06:09,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 10:06:09,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 10:06:09,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 10:06:09,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 10:06:09,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 10:06:09,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 10:06:09,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 10:06:09,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 10:06:09,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 10:06:09,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 10:06:09,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 10:06:09,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 10:06:09,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 10:06:09,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 10:06:09,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 10:06:09,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 10:06:09,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 10:06:09,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 10:06:09,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 10:06:09,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 10:06:09,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 10:06:09,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 10:06:09,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 10:06:09,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 10:06:09,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 10:06:09,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 10:06:09,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 10:06:09,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 10:06:09,652 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-07 10:06:09,671 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 10:06:09,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 10:06:09,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 10:06:09,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 10:06:09,674 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 10:06:09,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 10:06:09,674 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 10:06:09,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 10:06:09,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 10:06:09,675 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 10:06:09,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 10:06:09,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 10:06:09,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 10:06:09,677 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 10:06:09,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 10:06:09,677 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 10:06:09,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 10:06:09,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 10:06:09,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 10:06:09,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 10:06:09,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 10:06:09,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:06:09,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 10:06:09,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 10:06:09,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 10:06:09,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 10:06:09,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 10:06:09,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 10:06:09,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 10:06:09,712 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 10:06:09,729 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 10:06:09,733 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 10:06:09,735 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 10:06:09,735 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 10:06:09,736 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2019-09-07 10:06:09,813 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/947f08ce1/6039ef68e06a4a349363778a559d2d87/FLAGb6d1252c9 [2019-09-07 10:06:10,322 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 10:06:10,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-1.i [2019-09-07 10:06:10,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/947f08ce1/6039ef68e06a4a349363778a559d2d87/FLAGb6d1252c9 [2019-09-07 10:06:10,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/947f08ce1/6039ef68e06a4a349363778a559d2d87 [2019-09-07 10:06:10,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 10:06:10,736 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 10:06:10,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 10:06:10,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 10:06:10,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 10:06:10,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:06:10" (1/1) ... [2019-09-07 10:06:10,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9277f41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:10, skipping insertion in model container [2019-09-07 10:06:10,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:06:10" (1/1) ... [2019-09-07 10:06:10,756 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 10:06:10,776 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 10:06:10,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:06:11,000 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 10:06:11,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:06:11,148 INFO L192 MainTranslator]: Completed translation [2019-09-07 10:06:11,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11 WrapperNode [2019-09-07 10:06:11,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 10:06:11,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 10:06:11,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 10:06:11,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 10:06:11,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11" (1/1) ... [2019-09-07 10:06:11,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11" (1/1) ... [2019-09-07 10:06:11,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11" (1/1) ... [2019-09-07 10:06:11,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11" (1/1) ... [2019-09-07 10:06:11,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11" (1/1) ... [2019-09-07 10:06:11,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11" (1/1) ... [2019-09-07 10:06:11,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11" (1/1) ... [2019-09-07 10:06:11,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 10:06:11,190 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 10:06:11,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 10:06:11,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 10:06:11,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:06:11,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 10:06:11,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 10:06:11,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 10:06:11,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 10:06:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 10:06:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 10:06:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 10:06:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 10:06:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 10:06:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 10:06:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 10:06:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 10:06:11,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 10:06:11,570 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 10:06:11,570 INFO L283 CfgBuilder]: Removed 8 assume(true) statements. [2019-09-07 10:06:11,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:06:11 BoogieIcfgContainer [2019-09-07 10:06:11,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 10:06:11,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 10:06:11,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 10:06:11,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 10:06:11,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 10:06:10" (1/3) ... [2019-09-07 10:06:11,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7621a962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:06:11, skipping insertion in model container [2019-09-07 10:06:11,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:06:11" (2/3) ... [2019-09-07 10:06:11,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7621a962 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:06:11, skipping insertion in model container [2019-09-07 10:06:11,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:06:11" (3/3) ... [2019-09-07 10:06:11,585 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-1.i [2019-09-07 10:06:11,598 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 10:06:11,606 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 10:06:11,623 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 10:06:11,659 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 10:06:11,660 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 10:06:11,660 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 10:06:11,660 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 10:06:11,661 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 10:06:11,661 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 10:06:11,661 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 10:06:11,661 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 10:06:11,661 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 10:06:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-09-07 10:06:11,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 10:06:11,683 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:11,684 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:11,687 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:11,693 INFO L82 PathProgramCache]: Analyzing trace with hash -190793262, now seen corresponding path program 1 times [2019-09-07 10:06:11,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:11,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:11,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:11,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:11,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:06:11,841 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:06:11,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 10:06:11,844 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 10:06:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 10:06:11,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:06:11,857 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2019-09-07 10:06:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:11,881 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2019-09-07 10:06:11,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 10:06:11,882 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2019-09-07 10:06:11,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:11,889 INFO L225 Difference]: With dead ends: 63 [2019-09-07 10:06:11,889 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 10:06:11,893 INFO L628 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 [2019-09-07 10:06:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 10:06:11,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-07 10:06:11,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-07 10:06:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-07 10:06:11,932 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 25 [2019-09-07 10:06:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:11,933 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-07 10:06:11,933 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 10:06:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-07 10:06:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 10:06:11,934 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:11,934 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:11,935 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:11,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1826977482, now seen corresponding path program 1 times [2019-09-07 10:06:11,935 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:11,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:11,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:11,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:11,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:12,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:06:12,026 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:06:12,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 10:06:12,028 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 10:06:12,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 10:06:12,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:06:12,029 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2019-09-07 10:06:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:12,132 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2019-09-07 10:06:12,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 10:06:12,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-09-07 10:06:12,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:12,134 INFO L225 Difference]: With dead ends: 60 [2019-09-07 10:06:12,134 INFO L226 Difference]: Without dead ends: 37 [2019-09-07 10:06:12,136 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:06:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-07 10:06:12,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-07 10:06:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 10:06:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2019-09-07 10:06:12,145 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2019-09-07 10:06:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:12,145 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2019-09-07 10:06:12,146 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 10:06:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2019-09-07 10:06:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 10:06:12,147 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:12,147 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:12,148 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:12,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:12,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1635964633, now seen corresponding path program 1 times [2019-09-07 10:06:12,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:12,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:12,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:12,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:12,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 10:06:12,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:12,249 INFO L223 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) [2019-09-07 10:06:12,271 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 [2019-09-07 10:06:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:12,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 10:06:12,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:06:12,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:12,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 10:06:12,368 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:06:12,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:06:12,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:06:12,369 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 5 states. [2019-09-07 10:06:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:12,504 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2019-09-07 10:06:12,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 10:06:12,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-09-07 10:06:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:12,506 INFO L225 Difference]: With dead ends: 73 [2019-09-07 10:06:12,507 INFO L226 Difference]: Without dead ends: 44 [2019-09-07 10:06:12,507 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:06:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-07 10:06:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-07 10:06:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 10:06:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-09-07 10:06:12,516 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 32 [2019-09-07 10:06:12,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:12,517 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-09-07 10:06:12,517 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:06:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-09-07 10:06:12,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-07 10:06:12,519 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:12,519 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:12,519 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:12,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:12,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1768739882, now seen corresponding path program 2 times [2019-09-07 10:06:12,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:12,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:12,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:12,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:12,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 10:06:12,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:12,616 INFO L223 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) [2019-09-07 10:06:12,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:12,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:06:12,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:12,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 10:06:12,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 10:06:12,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:12,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 10:06:12,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 10:06:12,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 10:06:12,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:06:12,711 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 6 states. [2019-09-07 10:06:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:12,867 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2019-09-07 10:06:12,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 10:06:12,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-09-07 10:06:12,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:12,870 INFO L225 Difference]: With dead ends: 86 [2019-09-07 10:06:12,870 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 10:06:12,872 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:06:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 10:06:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-07 10:06:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 10:06:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2019-09-07 10:06:12,889 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 39 [2019-09-07 10:06:12,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:12,890 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2019-09-07 10:06:12,890 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 10:06:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2019-09-07 10:06:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 10:06:12,893 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:12,893 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:12,893 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:12,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1394041657, now seen corresponding path program 3 times [2019-09-07 10:06:12,896 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:12,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:12,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:12,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:12,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 10:06:13,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:13,023 INFO L223 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) [2019-09-07 10:06:13,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:13,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 10:06:13,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:13,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 10:06:13,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 10:06:13,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:13,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 10:06:13,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 10:06:13,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 10:06:13,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:06:13,121 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 7 states. [2019-09-07 10:06:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:13,284 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2019-09-07 10:06:13,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:06:13,286 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-09-07 10:06:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:13,287 INFO L225 Difference]: With dead ends: 99 [2019-09-07 10:06:13,287 INFO L226 Difference]: Without dead ends: 58 [2019-09-07 10:06:13,288 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:06:13,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-07 10:06:13,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-07 10:06:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-07 10:06:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-09-07 10:06:13,306 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 46 [2019-09-07 10:06:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:13,307 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-09-07 10:06:13,307 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 10:06:13,308 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-09-07 10:06:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-07 10:06:13,309 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:13,309 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:13,310 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:13,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:13,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1002468982, now seen corresponding path program 4 times [2019-09-07 10:06:13,311 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:13,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:13,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:13,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:13,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-07 10:06:13,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:13,447 INFO L223 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 [2019-09-07 10:06:13,469 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:06:13,507 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:06:13,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:13,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 10:06:13,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-07 10:06:13,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:13,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 10:06:13,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 10:06:13,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 10:06:13,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:06:13,536 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 8 states. [2019-09-07 10:06:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:13,663 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2019-09-07 10:06:13,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 10:06:13,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-09-07 10:06:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:13,671 INFO L225 Difference]: With dead ends: 112 [2019-09-07 10:06:13,672 INFO L226 Difference]: Without dead ends: 65 [2019-09-07 10:06:13,673 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:06:13,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-07 10:06:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-07 10:06:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-07 10:06:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2019-09-07 10:06:13,692 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 53 [2019-09-07 10:06:13,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:13,693 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2019-09-07 10:06:13,693 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 10:06:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2019-09-07 10:06:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-07 10:06:13,694 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:13,695 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:13,695 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:13,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:13,695 INFO L82 PathProgramCache]: Analyzing trace with hash 451754087, now seen corresponding path program 5 times [2019-09-07 10:06:13,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:13,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:13,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:13,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:13,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-09-07 10:06:13,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:13,884 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:13,908 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:06:18,269 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-07 10:06:18,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:18,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 10:06:18,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-09-07 10:06:18,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:18,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 10:06:18,321 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 10:06:18,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 10:06:18,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:06:18,322 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 9 states. [2019-09-07 10:06:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:18,477 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2019-09-07 10:06:18,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 10:06:18,478 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2019-09-07 10:06:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:18,479 INFO L225 Difference]: With dead ends: 125 [2019-09-07 10:06:18,479 INFO L226 Difference]: Without dead ends: 72 [2019-09-07 10:06:18,483 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:06:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-07 10:06:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-07 10:06:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 10:06:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2019-09-07 10:06:18,497 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 60 [2019-09-07 10:06:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:18,498 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2019-09-07 10:06:18,498 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 10:06:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2019-09-07 10:06:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-07 10:06:18,500 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:18,500 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:18,500 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:18,501 INFO L82 PathProgramCache]: Analyzing trace with hash 757831402, now seen corresponding path program 6 times [2019-09-07 10:06:18,501 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:18,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:18,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:18,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:18,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-09-07 10:06:18,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:18,620 INFO L223 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:18,635 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:06:19,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-07 10:06:19,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:19,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 10:06:19,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:20,021 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-09-07 10:06:20,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:20,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 10:06:20,035 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 10:06:20,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 10:06:20,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:06:20,037 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 10 states. [2019-09-07 10:06:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:20,189 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2019-09-07 10:06:20,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 10:06:20,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-09-07 10:06:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:20,191 INFO L225 Difference]: With dead ends: 138 [2019-09-07 10:06:20,191 INFO L226 Difference]: Without dead ends: 79 [2019-09-07 10:06:20,192 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:06:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-07 10:06:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-07 10:06:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 10:06:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2019-09-07 10:06:20,201 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 67 [2019-09-07 10:06:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:20,202 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2019-09-07 10:06:20,202 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 10:06:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2019-09-07 10:06:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-07 10:06:20,203 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:20,204 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:20,204 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:20,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1686307833, now seen corresponding path program 7 times [2019-09-07 10:06:20,205 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:20,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:20,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:20,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:20,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-09-07 10:06:20,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:20,351 INFO L223 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:20,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:20,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 10:06:20,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-09-07 10:06:20,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:20,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 10:06:20,447 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 10:06:20,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 10:06:20,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:06:20,448 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand 11 states. [2019-09-07 10:06:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:20,604 INFO L93 Difference]: Finished difference Result 151 states and 171 transitions. [2019-09-07 10:06:20,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 10:06:20,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 74 [2019-09-07 10:06:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:20,605 INFO L225 Difference]: With dead ends: 151 [2019-09-07 10:06:20,605 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 10:06:20,607 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:06:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 10:06:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-07 10:06:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-07 10:06:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2019-09-07 10:06:20,617 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 74 [2019-09-07 10:06:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:20,618 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2019-09-07 10:06:20,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 10:06:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2019-09-07 10:06:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 10:06:20,620 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:20,620 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:20,620 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:20,621 INFO L82 PathProgramCache]: Analyzing trace with hash 494861386, now seen corresponding path program 8 times [2019-09-07 10:06:20,621 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:20,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:20,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:20,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:06:20,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-09-07 10:06:20,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:20,766 INFO L223 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) [2019-09-07 10:06:20,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:20,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:06:20,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:20,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 10:06:20,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-09-07 10:06:20,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:20,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 10:06:20,896 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 10:06:20,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 10:06:20,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:06:20,897 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand 12 states. [2019-09-07 10:06:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:21,074 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2019-09-07 10:06:21,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 10:06:21,074 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2019-09-07 10:06:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:21,075 INFO L225 Difference]: With dead ends: 164 [2019-09-07 10:06:21,075 INFO L226 Difference]: Without dead ends: 93 [2019-09-07 10:06:21,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:06:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-07 10:06:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-07 10:06:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-07 10:06:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2019-09-07 10:06:21,085 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 81 [2019-09-07 10:06:21,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:21,085 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2019-09-07 10:06:21,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 10:06:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2019-09-07 10:06:21,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-07 10:06:21,087 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:21,087 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:21,087 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:21,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:21,088 INFO L82 PathProgramCache]: Analyzing trace with hash -938874969, now seen corresponding path program 9 times [2019-09-07 10:06:21,088 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:21,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:21,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:21,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:21,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-09-07 10:06:21,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:21,200 INFO L223 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 [2019-09-07 10:06:21,219 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:06:32,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-07 10:06:32,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:32,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 10:06:32,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-09-07 10:06:32,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:32,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 10:06:32,881 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 10:06:32,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 10:06:32,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:06:32,882 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand 13 states. [2019-09-07 10:06:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:33,066 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2019-09-07 10:06:33,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 10:06:33,066 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2019-09-07 10:06:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:33,067 INFO L225 Difference]: With dead ends: 177 [2019-09-07 10:06:33,067 INFO L226 Difference]: Without dead ends: 100 [2019-09-07 10:06:33,068 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:06:33,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-07 10:06:33,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-07 10:06:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-07 10:06:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2019-09-07 10:06:33,076 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 88 [2019-09-07 10:06:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:33,076 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2019-09-07 10:06:33,076 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 10:06:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2019-09-07 10:06:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 10:06:33,078 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:33,078 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:33,079 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:33,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:33,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1207453270, now seen corresponding path program 10 times [2019-09-07 10:06:33,079 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:33,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:33,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:33,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:33,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:33,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-07 10:06:33,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:33,215 INFO L223 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 [2019-09-07 10:06:33,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:06:33,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:06:33,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:06:33,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 10:06:33,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:06:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-07 10:06:33,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:06:33,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 10:06:33,319 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:06:33,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:06:33,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:06:33,320 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 14 states. [2019-09-07 10:06:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:06:33,501 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2019-09-07 10:06:33,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:06:33,502 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 95 [2019-09-07 10:06:33,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:06:33,503 INFO L225 Difference]: With dead ends: 190 [2019-09-07 10:06:33,503 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 10:06:33,504 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:06:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 10:06:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-07 10:06:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-07 10:06:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2019-09-07 10:06:33,511 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 95 [2019-09-07 10:06:33,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:06:33,512 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2019-09-07 10:06:33,512 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:06:33,512 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2019-09-07 10:06:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-07 10:06:33,513 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:06:33,514 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:06:33,514 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:06:33,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:06:33,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1082522439, now seen corresponding path program 11 times [2019-09-07 10:06:33,514 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:06:33,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:06:33,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:33,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:06:33,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:06:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:06:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2019-09-07 10:06:33,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:06:33,658 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:06:33,669 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:07:23,007 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-07 10:07:23,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:07:23,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 10:07:23,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:07:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2019-09-07 10:07:23,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:07:23,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 10:07:23,094 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 10:07:23,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 10:07:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:07:23,095 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 15 states. [2019-09-07 10:07:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:07:23,334 INFO L93 Difference]: Finished difference Result 203 states and 223 transitions. [2019-09-07 10:07:23,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 10:07:23,335 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 102 [2019-09-07 10:07:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:07:23,336 INFO L225 Difference]: With dead ends: 203 [2019-09-07 10:07:23,336 INFO L226 Difference]: Without dead ends: 114 [2019-09-07 10:07:23,337 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:07:23,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-09-07 10:07:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-09-07 10:07:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-07 10:07:23,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2019-09-07 10:07:23,351 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 102 [2019-09-07 10:07:23,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:07:23,352 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2019-09-07 10:07:23,352 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 10:07:23,352 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2019-09-07 10:07:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-07 10:07:23,358 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:07:23,358 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:07:23,358 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:07:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:07:23,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1458319606, now seen corresponding path program 12 times [2019-09-07 10:07:23,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:07:23,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:07:23,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:23,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:07:23,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:07:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2019-09-07 10:07:23,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:07:23,602 INFO L223 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) [2019-09-07 10:07:23,632 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:07:58,855 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 10:07:58,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:07:58,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 10:07:58,888 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:07:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2019-09-07 10:07:58,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:07:58,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 10:07:58,931 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 10:07:58,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 10:07:58,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:07:58,932 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 16 states. [2019-09-07 10:07:59,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:07:59,111 INFO L93 Difference]: Finished difference Result 216 states and 236 transitions. [2019-09-07 10:07:59,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 10:07:59,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2019-09-07 10:07:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:07:59,112 INFO L225 Difference]: With dead ends: 216 [2019-09-07 10:07:59,112 INFO L226 Difference]: Without dead ends: 121 [2019-09-07 10:07:59,113 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:07:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-09-07 10:07:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-09-07 10:07:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 10:07:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2019-09-07 10:07:59,121 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 109 [2019-09-07 10:07:59,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:07:59,122 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2019-09-07 10:07:59,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 10:07:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2019-09-07 10:07:59,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-07 10:07:59,123 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:07:59,123 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:07:59,124 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:07:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:07:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash -882690329, now seen corresponding path program 13 times [2019-09-07 10:07:59,125 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:07:59,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:07:59,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:59,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:07:59,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:07:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2019-09-07 10:07:59,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:07:59,351 INFO L223 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 [2019-09-07 10:07:59,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:07:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:07:59,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 10:07:59,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:07:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2019-09-07 10:07:59,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:07:59,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 10:07:59,491 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:07:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:07:59,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:07:59,492 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand 17 states. [2019-09-07 10:07:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:07:59,742 INFO L93 Difference]: Finished difference Result 229 states and 249 transitions. [2019-09-07 10:07:59,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:07:59,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 116 [2019-09-07 10:07:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:07:59,745 INFO L225 Difference]: With dead ends: 229 [2019-09-07 10:07:59,745 INFO L226 Difference]: Without dead ends: 128 [2019-09-07 10:07:59,746 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:07:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-09-07 10:07:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2019-09-07 10:07:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-07 10:07:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2019-09-07 10:07:59,752 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 116 [2019-09-07 10:07:59,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:07:59,752 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2019-09-07 10:07:59,752 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:07:59,752 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2019-09-07 10:07:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 10:07:59,753 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:07:59,754 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:07:59,754 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:07:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:07:59,754 INFO L82 PathProgramCache]: Analyzing trace with hash 108084330, now seen corresponding path program 14 times [2019-09-07 10:07:59,754 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:07:59,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:07:59,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:59,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:07:59,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:07:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:07:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-07 10:07:59,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:07:59,966 INFO L223 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) [2019-09-07 10:07:59,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:08:00,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:08:00,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:08:00,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 10:08:00,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:08:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-07 10:08:00,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:08:00,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 10:08:00,098 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 10:08:00,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 10:08:00,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:08:00,110 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand 18 states. [2019-09-07 10:08:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:08:00,359 INFO L93 Difference]: Finished difference Result 242 states and 262 transitions. [2019-09-07 10:08:00,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 10:08:00,360 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 123 [2019-09-07 10:08:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:08:00,361 INFO L225 Difference]: With dead ends: 242 [2019-09-07 10:08:00,361 INFO L226 Difference]: Without dead ends: 135 [2019-09-07 10:08:00,362 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:08:00,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-09-07 10:08:00,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2019-09-07 10:08:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-07 10:08:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 142 transitions. [2019-09-07 10:08:00,370 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 142 transitions. Word has length 123 [2019-09-07 10:08:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:08:00,370 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 142 transitions. [2019-09-07 10:08:00,370 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 10:08:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 142 transitions. [2019-09-07 10:08:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 10:08:00,372 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:08:00,372 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:08:00,373 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:08:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:08:00,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1972607623, now seen corresponding path program 15 times [2019-09-07 10:08:00,373 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:08:00,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:08:00,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:00,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:08:00,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:08:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-09-07 10:08:00,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:08:00,613 INFO L223 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 [2019-09-07 10:08:00,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:08:55,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 10:08:55,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:08:55,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 10:08:55,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:08:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-09-07 10:08:55,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:08:55,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 10:08:55,228 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 10:08:55,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 10:08:55,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:08:55,229 INFO L87 Difference]: Start difference. First operand 135 states and 142 transitions. Second operand 19 states. [2019-09-07 10:08:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:08:55,428 INFO L93 Difference]: Finished difference Result 255 states and 275 transitions. [2019-09-07 10:08:55,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 10:08:55,429 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 130 [2019-09-07 10:08:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:08:55,430 INFO L225 Difference]: With dead ends: 255 [2019-09-07 10:08:55,430 INFO L226 Difference]: Without dead ends: 142 [2019-09-07 10:08:55,431 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:08:55,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-09-07 10:08:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2019-09-07 10:08:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 10:08:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2019-09-07 10:08:55,440 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 130 [2019-09-07 10:08:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:08:55,441 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2019-09-07 10:08:55,441 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 10:08:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2019-09-07 10:08:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 10:08:55,443 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:08:55,443 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:08:55,443 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:08:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:08:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash 795738570, now seen corresponding path program 16 times [2019-09-07 10:08:55,444 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:08:55,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:08:55,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:55,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:08:55,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:08:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2019-09-07 10:08:55,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:08:55,709 INFO L223 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 [2019-09-07 10:08:55,720 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:08:55,832 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:08:55,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:08:55,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 10:08:55,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:08:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2019-09-07 10:08:55,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:08:55,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 10:08:55,869 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:08:55,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:08:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:08:55,870 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand 20 states. [2019-09-07 10:08:56,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:08:56,139 INFO L93 Difference]: Finished difference Result 268 states and 288 transitions. [2019-09-07 10:08:56,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:08:56,140 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 137 [2019-09-07 10:08:56,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:08:56,141 INFO L225 Difference]: With dead ends: 268 [2019-09-07 10:08:56,141 INFO L226 Difference]: Without dead ends: 149 [2019-09-07 10:08:56,142 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:08:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-07 10:08:56,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2019-09-07 10:08:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-09-07 10:08:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 156 transitions. [2019-09-07 10:08:56,148 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 156 transitions. Word has length 137 [2019-09-07 10:08:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:08:56,149 INFO L475 AbstractCegarLoop]: Abstraction has 149 states and 156 transitions. [2019-09-07 10:08:56,149 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:08:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 156 transitions. [2019-09-07 10:08:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-09-07 10:08:56,151 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:08:56,151 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:08:56,151 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:08:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:08:56,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1299634649, now seen corresponding path program 17 times [2019-09-07 10:08:56,152 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:08:56,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:08:56,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:56,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:08:56,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:08:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:08:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2019-09-07 10:08:56,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:08:56,395 INFO L223 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 [2019-09-07 10:08:56,407 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:10:22,058 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-07 10:10:22,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:10:22,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 10:10:22,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:10:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2019-09-07 10:10:22,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:10:22,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 10:10:22,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 10:10:22,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 10:10:22,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:10:22,193 INFO L87 Difference]: Start difference. First operand 149 states and 156 transitions. Second operand 21 states. [2019-09-07 10:10:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:10:22,491 INFO L93 Difference]: Finished difference Result 281 states and 301 transitions. [2019-09-07 10:10:22,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 10:10:22,492 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2019-09-07 10:10:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:10:22,493 INFO L225 Difference]: With dead ends: 281 [2019-09-07 10:10:22,493 INFO L226 Difference]: Without dead ends: 156 [2019-09-07 10:10:22,493 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:10:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-07 10:10:22,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2019-09-07 10:10:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-07 10:10:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2019-09-07 10:10:22,498 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 144 [2019-09-07 10:10:22,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:10:22,499 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2019-09-07 10:10:22,499 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 10:10:22,499 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2019-09-07 10:10:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-07 10:10:22,500 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:10:22,500 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:10:22,500 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:10:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:10:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1395122390, now seen corresponding path program 18 times [2019-09-07 10:10:22,501 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:10:22,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:10:22,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:10:22,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:10:22,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:10:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:10:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2019-09-07 10:10:22,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:10:22,761 INFO L223 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 [2019-09-07 10:10:22,772 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:11:36,390 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 10:11:36,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:11:36,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 10:11:36,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:11:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 18 proven. 171 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2019-09-07 10:11:36,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:11:36,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 23 [2019-09-07 10:11:36,535 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:11:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:11:36,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:11:36,536 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand 23 states. [2019-09-07 10:11:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:11:36,841 INFO L93 Difference]: Finished difference Result 294 states and 314 transitions. [2019-09-07 10:11:36,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:11:36,842 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 151 [2019-09-07 10:11:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:11:36,843 INFO L225 Difference]: With dead ends: 294 [2019-09-07 10:11:36,843 INFO L226 Difference]: Without dead ends: 163 [2019-09-07 10:11:36,844 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:11:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-07 10:11:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2019-09-07 10:11:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2019-09-07 10:11:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 170 transitions. [2019-09-07 10:11:36,852 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 170 transitions. Word has length 151 [2019-09-07 10:11:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:11:36,855 INFO L475 AbstractCegarLoop]: Abstraction has 163 states and 170 transitions. [2019-09-07 10:11:36,855 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:11:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 170 transitions. [2019-09-07 10:11:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-09-07 10:11:36,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:11:36,856 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:11:36,857 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:11:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:11:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2083903943, now seen corresponding path program 19 times [2019-09-07 10:11:36,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:11:36,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:11:36,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:36,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:11:36,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:11:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2019-09-07 10:11:37,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:11:37,315 INFO L223 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) [2019-09-07 10:11:37,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:11:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:11:37,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 10:11:37,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:11:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1330 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2019-09-07 10:11:37,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:11:37,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 10:11:37,482 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:11:37,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:11:37,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:11:37,483 INFO L87 Difference]: Start difference. First operand 163 states and 170 transitions. Second operand 23 states. [2019-09-07 10:11:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:11:37,772 INFO L93 Difference]: Finished difference Result 307 states and 327 transitions. [2019-09-07 10:11:37,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:11:37,772 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 158 [2019-09-07 10:11:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:11:37,774 INFO L225 Difference]: With dead ends: 307 [2019-09-07 10:11:37,774 INFO L226 Difference]: Without dead ends: 170 [2019-09-07 10:11:37,775 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:11:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-09-07 10:11:37,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2019-09-07 10:11:37,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-09-07 10:11:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2019-09-07 10:11:37,781 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 158 [2019-09-07 10:11:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:11:37,781 INFO L475 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2019-09-07 10:11:37,781 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:11:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2019-09-07 10:11:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-09-07 10:11:37,782 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:11:37,783 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:11:37,783 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:11:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:11:37,783 INFO L82 PathProgramCache]: Analyzing trace with hash 285054090, now seen corresponding path program 20 times [2019-09-07 10:11:37,784 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:11:37,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:11:37,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:37,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:11:37,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:11:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2019-09-07 10:11:38,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:11:38,172 INFO L223 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 [2019-09-07 10:11:38,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:11:38,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:11:38,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:11:38,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 10:11:38,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:11:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2019-09-07 10:11:38,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:11:38,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 10:11:38,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 10:11:38,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 10:11:38,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:11:38,349 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand 24 states. [2019-09-07 10:11:38,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:11:38,685 INFO L93 Difference]: Finished difference Result 320 states and 340 transitions. [2019-09-07 10:11:38,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 10:11:38,689 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 165 [2019-09-07 10:11:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:11:38,691 INFO L225 Difference]: With dead ends: 320 [2019-09-07 10:11:38,691 INFO L226 Difference]: Without dead ends: 177 [2019-09-07 10:11:38,692 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:11:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-09-07 10:11:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2019-09-07 10:11:38,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-07 10:11:38,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 184 transitions. [2019-09-07 10:11:38,700 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 184 transitions. Word has length 165 [2019-09-07 10:11:38,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:11:38,700 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 184 transitions. [2019-09-07 10:11:38,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 10:11:38,700 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 184 transitions. [2019-09-07 10:11:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-07 10:11:38,701 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:11:38,702 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:11:38,702 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:11:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:11:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1930147175, now seen corresponding path program 21 times [2019-09-07 10:11:38,702 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:11:38,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:11:38,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:38,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:11:38,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:11:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:11:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2019-09-07 10:11:39,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:11:39,162 INFO L223 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 [2019-09-07 10:11:39,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:13:06,851 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 10:13:06,851 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:06,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 10:13:06,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2019-09-07 10:13:06,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:06,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 10:13:06,984 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 10:13:06,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 10:13:06,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:13:06,985 INFO L87 Difference]: Start difference. First operand 177 states and 184 transitions. Second operand 25 states. [2019-09-07 10:13:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:07,336 INFO L93 Difference]: Finished difference Result 333 states and 353 transitions. [2019-09-07 10:13:07,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 10:13:07,337 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 172 [2019-09-07 10:13:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:07,339 INFO L225 Difference]: With dead ends: 333 [2019-09-07 10:13:07,339 INFO L226 Difference]: Without dead ends: 184 [2019-09-07 10:13:07,340 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:13:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-09-07 10:13:07,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2019-09-07 10:13:07,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-09-07 10:13:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2019-09-07 10:13:07,351 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 172 [2019-09-07 10:13:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:07,351 INFO L475 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2019-09-07 10:13:07,351 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 10:13:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2019-09-07 10:13:07,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-07 10:13:07,353 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:07,354 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:07,354 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:07,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:07,355 INFO L82 PathProgramCache]: Analyzing trace with hash -676568598, now seen corresponding path program 22 times [2019-09-07 10:13:07,355 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:07,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:07,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:07,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:07,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-09-07 10:13:07,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:07,933 INFO L223 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) [2019-09-07 10:13:07,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:08,068 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:13:08,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:08,071 INFO L256 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 10:13:08,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-09-07 10:13:08,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:08,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 10:13:08,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 10:13:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 10:13:08,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:13:08,129 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand 26 states. [2019-09-07 10:13:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:08,477 INFO L93 Difference]: Finished difference Result 346 states and 366 transitions. [2019-09-07 10:13:08,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 10:13:08,477 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 179 [2019-09-07 10:13:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:08,478 INFO L225 Difference]: With dead ends: 346 [2019-09-07 10:13:08,478 INFO L226 Difference]: Without dead ends: 191 [2019-09-07 10:13:08,479 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:13:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-09-07 10:13:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2019-09-07 10:13:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-09-07 10:13:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 198 transitions. [2019-09-07 10:13:08,490 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 198 transitions. Word has length 179 [2019-09-07 10:13:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:08,491 INFO L475 AbstractCegarLoop]: Abstraction has 191 states and 198 transitions. [2019-09-07 10:13:08,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 10:13:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 198 transitions. [2019-09-07 10:13:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-07 10:13:08,493 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:08,494 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:08,494 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:08,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:08,495 INFO L82 PathProgramCache]: Analyzing trace with hash -33769209, now seen corresponding path program 23 times [2019-09-07 10:13:08,495 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:08,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:08,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:08,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:08,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2019-09-07 10:13:08,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:08,921 INFO L223 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 [2019-09-07 10:13:08,932 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:15:10,531 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-07 10:15:10,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:15:10,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 10:15:10,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:15:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2019-09-07 10:15:10,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:15:10,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 10:15:10,740 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 10:15:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 10:15:10,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:15:10,740 INFO L87 Difference]: Start difference. First operand 191 states and 198 transitions. Second operand 27 states. [2019-09-07 10:15:11,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:15:11,101 INFO L93 Difference]: Finished difference Result 359 states and 379 transitions. [2019-09-07 10:15:11,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 10:15:11,104 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 186 [2019-09-07 10:15:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:15:11,105 INFO L225 Difference]: With dead ends: 359 [2019-09-07 10:15:11,105 INFO L226 Difference]: Without dead ends: 198 [2019-09-07 10:15:11,106 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:15:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-09-07 10:15:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2019-09-07 10:15:11,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-09-07 10:15:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2019-09-07 10:15:11,115 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 186 [2019-09-07 10:15:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:15:11,115 INFO L475 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2019-09-07 10:15:11,115 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 10:15:11,115 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2019-09-07 10:15:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-09-07 10:15:11,117 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:15:11,117 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:15:11,118 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:15:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:15:11,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1177716554, now seen corresponding path program 24 times [2019-09-07 10:15:11,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:15:11,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:15:11,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:11,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:15:11,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:15:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2019-09-07 10:15:11,622 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:15:11,623 INFO L223 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 [2019-09-07 10:15:11,643 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:17:01,061 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 10:17:01,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:17:01,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 10:17:01,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:17:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2019-09-07 10:17:01,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:17:01,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 10:17:01,200 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 10:17:01,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 10:17:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:17:01,201 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand 28 states. [2019-09-07 10:17:01,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:17:01,572 INFO L93 Difference]: Finished difference Result 372 states and 392 transitions. [2019-09-07 10:17:01,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 10:17:01,574 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 193 [2019-09-07 10:17:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:17:01,576 INFO L225 Difference]: With dead ends: 372 [2019-09-07 10:17:01,576 INFO L226 Difference]: Without dead ends: 205 [2019-09-07 10:17:01,577 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:17:01,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-09-07 10:17:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2019-09-07 10:17:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-09-07 10:17:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 212 transitions. [2019-09-07 10:17:01,583 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 212 transitions. Word has length 193 [2019-09-07 10:17:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:17:01,584 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 212 transitions. [2019-09-07 10:17:01,584 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 10:17:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 212 transitions. [2019-09-07 10:17:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-09-07 10:17:01,585 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:17:01,585 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:17:01,585 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:17:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:17:01,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1786438823, now seen corresponding path program 25 times [2019-09-07 10:17:01,586 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:17:01,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:17:01,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:01,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:17:01,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:17:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2019-09-07 10:17:01,969 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:17:01,970 INFO L223 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 [2019-09-07 10:17:01,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:17:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:17:02,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 10:17:02,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:17:02,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2275 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1950 trivial. 0 not checked. [2019-09-07 10:17:02,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:17:02,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 10:17:02,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 10:17:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 10:17:02,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:17:02,177 INFO L87 Difference]: Start difference. First operand 205 states and 212 transitions. Second operand 29 states. [2019-09-07 10:17:02,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:17:02,488 INFO L93 Difference]: Finished difference Result 385 states and 405 transitions. [2019-09-07 10:17:02,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 10:17:02,488 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 200 [2019-09-07 10:17:02,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:17:02,490 INFO L225 Difference]: With dead ends: 385 [2019-09-07 10:17:02,490 INFO L226 Difference]: Without dead ends: 212 [2019-09-07 10:17:02,490 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:17:02,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-09-07 10:17:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2019-09-07 10:17:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-09-07 10:17:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2019-09-07 10:17:02,497 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 200 [2019-09-07 10:17:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:17:02,497 INFO L475 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2019-09-07 10:17:02,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 10:17:02,497 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2019-09-07 10:17:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-09-07 10:17:02,498 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:17:02,499 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:17:02,499 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:17:02,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:17:02,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1264452778, now seen corresponding path program 26 times [2019-09-07 10:17:02,499 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:17:02,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:17:02,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:02,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:17:02,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:17:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [2019-09-07 10:17:02,955 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:17:02,955 INFO L223 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 [2019-09-07 10:17:02,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:17:03,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:17:03,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:17:03,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 10:17:03,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:17:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2457 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2106 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (27)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:17:03,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:17:03,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 10:17:03,149 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 10:17:03,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 10:17:03,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:17:03,149 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand 30 states. [2019-09-07 10:17:03,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:17:03,557 INFO L93 Difference]: Finished difference Result 398 states and 418 transitions. [2019-09-07 10:17:03,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 10:17:03,562 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 207 [2019-09-07 10:17:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:17:03,564 INFO L225 Difference]: With dead ends: 398 [2019-09-07 10:17:03,564 INFO L226 Difference]: Without dead ends: 219 [2019-09-07 10:17:03,565 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:17:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-09-07 10:17:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2019-09-07 10:17:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-09-07 10:17:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 226 transitions. [2019-09-07 10:17:03,572 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 226 transitions. Word has length 207 [2019-09-07 10:17:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:17:03,572 INFO L475 AbstractCegarLoop]: Abstraction has 219 states and 226 transitions. [2019-09-07 10:17:03,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 10:17:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 226 transitions. [2019-09-07 10:17:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-09-07 10:17:03,573 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:17:03,574 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:17:03,574 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:17:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:17:03,574 INFO L82 PathProgramCache]: Analyzing trace with hash 209205319, now seen corresponding path program 27 times [2019-09-07 10:17:03,574 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:17:03,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:17:03,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:03,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:17:03,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:17:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:17:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2019-09-07 10:17:04,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:17:04,091 INFO L223 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) [2019-09-07 10:17:04,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:19:07,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-07 10:19:07,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:19:07,297 INFO L256 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 10:19:07,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:19:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2646 backedges. 27 proven. 378 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2019-09-07 10:19:07,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:19:07,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2019-09-07 10:19:07,448 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:19:07,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:19:07,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:19:07,449 INFO L87 Difference]: Start difference. First operand 219 states and 226 transitions. Second operand 32 states. [2019-09-07 10:19:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:19:07,979 INFO L93 Difference]: Finished difference Result 411 states and 431 transitions. [2019-09-07 10:19:07,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:19:07,979 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 214 [2019-09-07 10:19:07,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:19:07,980 INFO L225 Difference]: With dead ends: 411 [2019-09-07 10:19:07,981 INFO L226 Difference]: Without dead ends: 226 [2019-09-07 10:19:07,982 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:19:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-09-07 10:19:07,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2019-09-07 10:19:07,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-09-07 10:19:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2019-09-07 10:19:07,988 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 214 [2019-09-07 10:19:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:19:07,989 INFO L475 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2019-09-07 10:19:07,989 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:19:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2019-09-07 10:19:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-09-07 10:19:07,990 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:19:07,990 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:19:07,991 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:19:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:19:07,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1602017802, now seen corresponding path program 28 times [2019-09-07 10:19:07,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:19:07,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:19:07,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:07,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:19:07,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:19:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2019-09-07 10:19:08,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:19:08,565 INFO L223 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) [2019-09-07 10:19:08,582 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:19:08,729 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:19:08,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:19:08,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 10:19:08,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:19:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2436 trivial. 0 not checked. [2019-09-07 10:19:08,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:19:08,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-07 10:19:08,810 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:19:08,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:19:08,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:19:08,811 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand 32 states. [2019-09-07 10:19:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:19:09,225 INFO L93 Difference]: Finished difference Result 424 states and 444 transitions. [2019-09-07 10:19:09,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:19:09,226 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 221 [2019-09-07 10:19:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:19:09,228 INFO L225 Difference]: With dead ends: 424 [2019-09-07 10:19:09,228 INFO L226 Difference]: Without dead ends: 233 [2019-09-07 10:19:09,230 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:19:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-09-07 10:19:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2019-09-07 10:19:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-09-07 10:19:09,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 240 transitions. [2019-09-07 10:19:09,237 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 240 transitions. Word has length 221 [2019-09-07 10:19:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:19:09,237 INFO L475 AbstractCegarLoop]: Abstraction has 233 states and 240 transitions. [2019-09-07 10:19:09,237 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:19:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 240 transitions. [2019-09-07 10:19:09,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-07 10:19:09,239 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:19:09,239 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:19:09,239 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:19:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:19:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1583789031, now seen corresponding path program 29 times [2019-09-07 10:19:09,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:19:09,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:19:09,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:09,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:19:09,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:19:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2610 trivial. 0 not checked. [2019-09-07 10:19:09,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:19:09,860 INFO L223 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 [2019-09-07 10:19:09,882 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1