java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:21:39,555 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:21:39,557 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:21:39,569 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:21:39,570 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:21:39,571 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:21:39,572 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:21:39,573 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:21:39,575 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:21:39,576 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:21:39,577 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 21:21:39,606 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:21:39,631 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:21:39,631 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:21:39,632 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:21:39,632 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:21:39,633 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:21:39,633 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:21:39,633 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:21:39,633 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:21:39,633 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:21:39,634 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:21:39,634 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:21:39,634 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:21:39,634 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:21:39,634 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:21:39,635 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:21:39,635 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:21:39,635 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:21:39,635 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:21:39,635 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:21:39,636 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:21:39,636 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:21:39,636 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:21:39,636 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:21:39,636 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:21:39,636 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:21:39,637 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:21:39,637 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:21:39,637 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:21:39,637 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:21:39,637 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:21:39,702 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:21:39,718 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:21:39,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:21:39,724 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:21:39,725 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:21:39,725 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-23 21:21:39,726 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-23 21:21:39,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:21:39,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:21:39,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:21:39,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:21:39,784 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:21:39,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/1) ... [2018-09-23 21:21:39,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/1) ... [2018-09-23 21:21:39,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:21:39,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:21:39,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:21:39,825 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:21:39,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/1) ... [2018-09-23 21:21:39,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/1) ... [2018-09-23 21:21:39,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/1) ... [2018-09-23 21:21:39,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/1) ... [2018-09-23 21:21:39,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/1) ... [2018-09-23 21:21:39,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/1) ... [2018-09-23 21:21:39,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/1) ... [2018-09-23 21:21:39,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:21:39,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:21:39,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:21:39,851 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:21:39,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (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 [2018-09-23 21:21:39,939 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-23 21:21:39,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:21:39,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:21:40,203 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:21:40,203 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:21:40 BoogieIcfgContainer [2018-09-23 21:21:40,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:21:40,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:21:40,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:21:40,208 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:21:40,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:39" (1/2) ... [2018-09-23 21:21:40,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73738ac4 and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:21:40, skipping insertion in model container [2018-09-23 21:21:40,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:21:40" (2/2) ... [2018-09-23 21:21:40,211 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-23 21:21:40,219 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:21:40,227 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:21:40,273 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:21:40,274 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:21:40,274 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:21:40,274 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:21:40,275 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:21:40,275 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:21:40,275 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:21:40,275 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:21:40,275 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:21:40,291 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-23 21:21:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:21:40,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:40,298 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:40,300 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:40,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:40,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1951930377, now seen corresponding path program 1 times [2018-09-23 21:21:40,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:40,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:40,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:40,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:40,457 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:21:40,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:21:40,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:21:40,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:21:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:21:40,483 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-23 21:21:40,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:40,613 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-23 21:21:40,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:21:40,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-23 21:21:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:40,626 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:21:40,626 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:21:40,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:21:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:21:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-09-23 21:21:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:21:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-09-23 21:21:40,668 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2018-09-23 21:21:40,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:40,668 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2018-09-23 21:21:40,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:21:40,669 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2018-09-23 21:21:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:21:40,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:40,669 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:40,670 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:40,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:40,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1951989959, now seen corresponding path program 1 times [2018-09-23 21:21:40,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:40,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:40,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:40,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:40,743 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:21:40,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 21:21:40,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:21:40,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:21:40,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:21:40,746 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-09-23 21:21:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:40,813 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-09-23 21:21:40,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:21:40,814 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-23 21:21:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:40,815 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:21:40,815 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:21:40,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:21:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:21:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:21:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:21:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-09-23 21:21:40,822 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2018-09-23 21:21:40,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:40,822 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2018-09-23 21:21:40,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:21:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2018-09-23 21:21:40,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:21:40,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:40,823 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:40,823 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:40,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:40,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1455783312, now seen corresponding path program 1 times [2018-09-23 21:21:40,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:40,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:40,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:40,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 21:21:40,891 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:21:40,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 21:21:40,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:21:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:21:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:21:40,893 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-09-23 21:21:40,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:40,970 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-09-23 21:21:40,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:21:40,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-23 21:21:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:40,971 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:21:40,971 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:21:40,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:21:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:21:40,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-09-23 21:21:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:21:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-23 21:21:40,977 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-23 21:21:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:40,978 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-23 21:21:40,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:21:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-23 21:21:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:21:40,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:40,979 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:40,979 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:40,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:40,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1455723730, now seen corresponding path program 1 times [2018-09-23 21:21:40,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:40,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:40,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:40,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:41,073 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:21:41,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 21:21:41,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:21:41,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:21:41,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:21:41,075 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2018-09-23 21:21:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:41,139 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-09-23 21:21:41,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:21:41,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-23 21:21:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:41,140 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:21:41,140 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:21:41,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:21:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:21:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-23 21:21:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:21:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-09-23 21:21:41,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2018-09-23 21:21:41,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:41,147 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-09-23 21:21:41,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:21:41,147 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-09-23 21:21:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:21:41,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:41,148 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:41,148 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:41,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:41,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1394403420, now seen corresponding path program 1 times [2018-09-23 21:21:41,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:41,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:41,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:41,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:41,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:41,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:41,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:41,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:41,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:41,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:21:41,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:21:41,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:21:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:21:41,387 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2018-09-23 21:21:41,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:41,554 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-09-23 21:21:41,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:21:41,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-09-23 21:21:41,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:41,555 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:21:41,555 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:21:41,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:21:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:21:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:21:41,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:21:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-23 21:21:41,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-09-23 21:21:41,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:41,562 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-23 21:21:41,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:21:41,562 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-23 21:21:41,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:21:41,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:41,563 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:41,563 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:41,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash -961145443, now seen corresponding path program 2 times [2018-09-23 21:21:41,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:41,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:41,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:41,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:41,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:41,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:41,812 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:41,852 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:41,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:41,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:41,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:41,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:21:41,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:21:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:21:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:21:41,895 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-09-23 21:21:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:41,987 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-09-23 21:21:41,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:21:41,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-09-23 21:21:41,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:41,989 INFO L225 Difference]: With dead ends: 30 [2018-09-23 21:21:41,990 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:21:41,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:21:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:21:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-09-23 21:21:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:21:41,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-23 21:21:41,997 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-09-23 21:21:41,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:41,997 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-23 21:21:41,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:21:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-23 21:21:41,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:21:41,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:41,999 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 21:21:41,999 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:41,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:42,000 INFO L82 PathProgramCache]: Analyzing trace with hash -552275309, now seen corresponding path program 3 times [2018-09-23 21:21:42,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:42,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:42,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:42,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:42,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:42,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:42,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:42,264 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:42,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:21:42,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:42,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:42,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:42,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:21:42,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:21:42,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:21:42,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:21:42,347 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-23 21:21:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:42,438 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-09-23 21:21:42,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:21:42,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-23 21:21:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:42,439 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:21:42,440 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:21:42,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:21:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:21:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:21:42,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:21:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-23 21:21:42,446 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-09-23 21:21:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:42,446 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-23 21:21:42,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:21:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-23 21:21:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:21:42,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:42,447 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 21:21:42,448 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:42,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:42,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2071906362, now seen corresponding path program 4 times [2018-09-23 21:21:42,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:42,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:42,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:42,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:42,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:42,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:42,557 INFO L227 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 [2018-09-23 21:21:42,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:42,581 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:42,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:42,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:42,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:42,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:21:42,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:21:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:21:42,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:21:42,617 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-09-23 21:21:42,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:42,892 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-09-23 21:21:42,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:21:42,893 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-23 21:21:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:42,894 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:21:42,894 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:21:42,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:21:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:21:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-09-23 21:21:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:21:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-23 21:21:42,905 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2018-09-23 21:21:42,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:42,905 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-23 21:21:42,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:21:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-23 21:21:42,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:21:42,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:42,907 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:42,907 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:42,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:42,907 INFO L82 PathProgramCache]: Analyzing trace with hash -992407888, now seen corresponding path program 5 times [2018-09-23 21:21:42,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:42,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:42,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:42,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:43,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:43,076 INFO L227 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 [2018-09-23 21:21:43,085 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:43,105 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:21:43,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:43,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:43,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:43,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:21:43,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:21:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:21:43,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:21:43,144 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-23 21:21:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:43,460 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-23 21:21:43,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:21:43,460 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-23 21:21:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:43,461 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:21:43,461 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:21:43,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:21:43,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:21:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:21:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:21:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-23 21:21:43,468 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2018-09-23 21:21:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:43,468 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-23 21:21:43,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:21:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-23 21:21:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:21:43,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:43,470 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:43,470 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:43,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:43,470 INFO L82 PathProgramCache]: Analyzing trace with hash 390441321, now seen corresponding path program 6 times [2018-09-23 21:21:43,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:43,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:43,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:43,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:43,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:43,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:43,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:43,551 INFO L227 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 [2018-09-23 21:21:43,567 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:43,593 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 21:21:43,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:43,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:43,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:43,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:21:43,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:21:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:21:43,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:21:43,627 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-09-23 21:21:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:43,709 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-09-23 21:21:43,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:21:43,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-09-23 21:21:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:43,711 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:21:43,711 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:21:43,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:21:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:21:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-09-23 21:21:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:21:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-23 21:21:43,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-09-23 21:21:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:43,721 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-23 21:21:43,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:21:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-23 21:21:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 21:21:43,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:43,722 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-23 21:21:43,722 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:43,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:43,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1927135327, now seen corresponding path program 7 times [2018-09-23 21:21:43,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:43,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:43,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:43,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:43,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:43,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:43,905 INFO L227 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 [2018-09-23 21:21:43,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:43,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:43,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:43,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:21:43,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:21:43,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:21:43,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:21:43,984 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2018-09-23 21:21:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:44,229 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-09-23 21:21:44,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:21:44,229 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-09-23 21:21:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:44,232 INFO L225 Difference]: With dead ends: 58 [2018-09-23 21:21:44,233 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:21:44,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:21:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:21:44,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:21:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:21:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-23 21:21:44,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-09-23 21:21:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:44,246 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-23 21:21:44,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:21:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-23 21:21:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:21:44,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:44,247 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2018-09-23 21:21:44,248 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:44,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash -906890938, now seen corresponding path program 8 times [2018-09-23 21:21:44,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:44,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:44,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:44,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:44,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:44,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:44,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:44,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:44,441 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:44,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:44,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:44,473 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:44,473 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:21:44,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:21:44,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:21:44,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:21:44,474 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2018-09-23 21:21:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:44,557 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-09-23 21:21:44,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:21:44,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-09-23 21:21:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:44,558 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:21:44,559 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:21:44,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:21:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:21:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-23 21:21:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:21:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-23 21:21:44,568 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2018-09-23 21:21:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:44,569 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-23 21:21:44,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:21:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-23 21:21:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:21:44,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:44,570 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-23 21:21:44,571 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:44,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:44,571 INFO L82 PathProgramCache]: Analyzing trace with hash -466038340, now seen corresponding path program 9 times [2018-09-23 21:21:44,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:44,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:44,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:44,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:44,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:44,746 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:44,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:44,746 INFO L227 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 [2018-09-23 21:21:44,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:44,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:21:44,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:44,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:44,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:44,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:21:44,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:21:44,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:21:44,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:21:44,920 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2018-09-23 21:21:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:45,484 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-23 21:21:45,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:21:45,484 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-09-23 21:21:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:45,485 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:21:45,485 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 21:21:45,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:21:45,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 21:21:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 21:21:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:21:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-23 21:21:45,500 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2018-09-23 21:21:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:45,501 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-23 21:21:45,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:21:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-23 21:21:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:21:45,502 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:45,502 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2018-09-23 21:21:45,502 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:45,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:45,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1282545973, now seen corresponding path program 10 times [2018-09-23 21:21:45,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:45,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:45,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:45,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:45,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:45,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:45,699 INFO L227 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 [2018-09-23 21:21:45,707 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:45,732 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:45,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:45,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:45,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:45,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:21:45,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:21:45,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:21:45,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:21:45,779 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2018-09-23 21:21:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:46,122 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-09-23 21:21:46,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:21:46,123 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-09-23 21:21:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:46,123 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:21:46,124 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:21:46,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:21:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:21:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-09-23 21:21:46,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:21:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-23 21:21:46,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-09-23 21:21:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:46,135 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-23 21:21:46,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:21:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-23 21:21:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:21:46,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:46,137 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-09-23 21:21:46,137 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:46,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1500867115, now seen corresponding path program 11 times [2018-09-23 21:21:46,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:46,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:46,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:46,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:46,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:46,338 INFO L227 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 [2018-09-23 21:21:46,346 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:46,371 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:21:46,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:46,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:46,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:46,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:21:46,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:21:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:21:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:21:46,415 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2018-09-23 21:21:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:46,700 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-09-23 21:21:46,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:21:46,701 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-09-23 21:21:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:46,702 INFO L225 Difference]: With dead ends: 76 [2018-09-23 21:21:46,702 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:21:46,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:21:46,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:21:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:21:46,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:21:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-23 21:21:46,717 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2018-09-23 21:21:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:46,718 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-23 21:21:46,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:21:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-23 21:21:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:21:46,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:46,721 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2018-09-23 21:21:46,721 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:46,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:46,722 INFO L82 PathProgramCache]: Analyzing trace with hash 594208338, now seen corresponding path program 12 times [2018-09-23 21:21:46,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:46,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:46,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:46,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:46,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:46,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:46,858 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:46,893 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:21:46,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:46,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:46,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:46,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:21:46,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:21:46,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:21:46,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:21:46,928 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-09-23 21:21:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:47,036 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-09-23 21:21:47,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:21:47,037 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-09-23 21:21:47,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:47,037 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:21:47,037 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:21:47,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:21:47,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:21:47,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-09-23 21:21:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:21:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-23 21:21:47,047 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2018-09-23 21:21:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:47,048 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-23 21:21:47,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:21:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-23 21:21:47,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:21:47,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:47,049 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-23 21:21:47,049 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:47,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:47,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1054367944, now seen corresponding path program 13 times [2018-09-23 21:21:47,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:47,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:47,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:47,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:47,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:47,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:47,334 INFO L227 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 [2018-09-23 21:21:47,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:47,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:47,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:47,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:21:47,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:21:47,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:21:47,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:21:47,407 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2018-09-23 21:21:47,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:47,978 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-23 21:21:47,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:21:47,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-09-23 21:21:47,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:47,979 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:21:47,979 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:21:47,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:21:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:21:47,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:21:47,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:21:47,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-23 21:21:47,988 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2018-09-23 21:21:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:47,988 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-23 21:21:47,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:21:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-23 21:21:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:21:47,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:47,989 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2018-09-23 21:21:47,989 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:47,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:47,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1098736897, now seen corresponding path program 14 times [2018-09-23 21:21:47,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:47,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:47,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:47,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:47,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:48,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:48,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:48,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:48,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:48,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:48,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:48,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:48,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:21:48,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:21:48,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:21:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:21:48,303 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2018-09-23 21:21:48,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:48,435 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-09-23 21:21:48,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:21:48,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-09-23 21:21:48,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:48,437 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:21:48,437 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 21:21:48,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:21:48,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 21:21:48,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-09-23 21:21:48,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:21:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-23 21:21:48,445 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2018-09-23 21:21:48,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:48,446 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-23 21:21:48,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:21:48,446 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-23 21:21:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:21:48,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:48,447 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-23 21:21:48,447 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:48,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash -48369673, now seen corresponding path program 15 times [2018-09-23 21:21:48,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:48,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:48,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:48,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:48,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:48,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:48,689 INFO L227 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 [2018-09-23 21:21:48,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:48,729 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:21:48,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:48,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:48,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:48,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:21:48,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:21:48,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:21:48,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:21:48,770 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2018-09-23 21:21:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:49,547 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2018-09-23 21:21:49,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:21:49,547 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-09-23 21:21:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:49,550 INFO L225 Difference]: With dead ends: 94 [2018-09-23 21:21:49,551 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:21:49,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:21:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:21:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:21:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:21:49,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-23 21:21:49,562 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2018-09-23 21:21:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:49,563 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-23 21:21:49,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:21:49,563 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-23 21:21:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:21:49,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:49,566 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2018-09-23 21:21:49,567 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:49,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash 239052638, now seen corresponding path program 16 times [2018-09-23 21:21:49,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:49,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:49,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:49,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:49,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:49,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:49,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:49,744 INFO L227 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 [2018-09-23 21:21:49,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:49,776 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:49,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:49,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:49,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:49,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:21:49,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:21:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:21:49,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:21:49,823 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 12 states. [2018-09-23 21:21:49,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:49,955 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-09-23 21:21:49,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:21:49,955 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-09-23 21:21:49,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:49,956 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:21:49,956 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:21:49,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:21:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:21:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-23 21:21:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:21:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-23 21:21:49,964 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2018-09-23 21:21:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:49,964 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-23 21:21:49,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:21:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-23 21:21:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:21:49,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:49,965 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-09-23 21:21:49,966 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:49,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:49,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1074641876, now seen corresponding path program 17 times [2018-09-23 21:21:49,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:49,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:49,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:49,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:49,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:50,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:50,268 INFO L227 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 [2018-09-23 21:21:50,276 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:50,306 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:21:50,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:50,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:50,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:50,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:21:50,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:21:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:21:50,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:21:50,355 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-23 21:21:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:51,036 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-23 21:21:51,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:21:51,036 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-09-23 21:21:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:51,037 INFO L225 Difference]: With dead ends: 103 [2018-09-23 21:21:51,037 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:21:51,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:21:51,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:21:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:21:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:21:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-23 21:21:51,043 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2018-09-23 21:21:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:51,044 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-23 21:21:51,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:21:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-23 21:21:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:21:51,044 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:51,044 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2018-09-23 21:21:51,045 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:51,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1305899827, now seen corresponding path program 18 times [2018-09-23 21:21:51,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:51,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:51,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:51,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:51,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:51,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:51,484 INFO L227 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 [2018-09-23 21:21:51,491 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:51,527 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 21:21:51,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:51,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:51,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:51,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:21:51,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:21:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:21:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:21:51,564 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2018-09-23 21:21:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:52,016 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-09-23 21:21:52,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:21:52,018 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-09-23 21:21:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:52,019 INFO L225 Difference]: With dead ends: 70 [2018-09-23 21:21:52,019 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 21:21:52,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:21:52,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 21:21:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-09-23 21:21:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:21:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-23 21:21:52,029 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-09-23 21:21:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:52,029 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-23 21:21:52,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:21:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-23 21:21:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 21:21:52,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:52,030 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-09-23 21:21:52,031 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:52,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:52,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1754878403, now seen corresponding path program 19 times [2018-09-23 21:21:52,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:52,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:52,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:52,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:52,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:52,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:52,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:52,444 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:52,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:52,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:52,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:21:52,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:21:52,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:21:52,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:21:52,512 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2018-09-23 21:21:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:52,878 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-09-23 21:21:52,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:21:52,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-09-23 21:21:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:52,879 INFO L225 Difference]: With dead ends: 112 [2018-09-23 21:21:52,879 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:21:52,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:21:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:21:52,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:21:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:21:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-23 21:21:52,887 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2018-09-23 21:21:52,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:52,887 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-23 21:21:52,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:21:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-23 21:21:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:21:52,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:52,888 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2018-09-23 21:21:52,889 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:52,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:52,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1471794070, now seen corresponding path program 20 times [2018-09-23 21:21:52,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:52,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:52,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:52,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:52,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:53,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:53,058 INFO L227 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 [2018-09-23 21:21:53,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:53,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:53,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:53,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:53,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:53,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:21:53,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:21:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:21:53,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:21:53,133 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2018-09-23 21:21:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:53,285 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-09-23 21:21:53,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:21:53,286 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-09-23 21:21:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:53,287 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:21:53,287 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:21:53,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:21:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:21:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-09-23 21:21:53,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:21:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-23 21:21:53,293 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-09-23 21:21:53,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:53,294 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-23 21:21:53,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:21:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-23 21:21:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:21:53,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:53,295 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-23 21:21:53,295 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:53,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:53,296 INFO L82 PathProgramCache]: Analyzing trace with hash 716104416, now seen corresponding path program 21 times [2018-09-23 21:21:53,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:53,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:53,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:53,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:53,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:54,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:54,185 INFO L227 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 [2018-09-23 21:21:54,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:54,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:21:54,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:54,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:54,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:54,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:21:54,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:21:54,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:21:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:21:54,285 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2018-09-23 21:21:54,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:54,658 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-23 21:21:54,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:21:54,658 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-23 21:21:54,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:54,659 INFO L225 Difference]: With dead ends: 121 [2018-09-23 21:21:54,659 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 21:21:54,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:21:54,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 21:21:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 21:21:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 21:21:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-23 21:21:54,666 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-09-23 21:21:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:54,666 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-23 21:21:54,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:21:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-23 21:21:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 21:21:54,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:54,667 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2018-09-23 21:21:54,667 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:54,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:54,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1699180391, now seen corresponding path program 22 times [2018-09-23 21:21:54,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:54,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:54,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:54,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:54,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:55,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:55,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:55,832 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:55,880 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:55,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:55,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:55,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:55,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:21:55,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:21:55,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:21:55,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:21:55,919 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-09-23 21:21:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:56,007 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-09-23 21:21:56,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:21:56,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-09-23 21:21:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:56,008 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:21:56,008 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 21:21:56,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:21:56,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 21:21:56,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-09-23 21:21:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:21:56,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-23 21:21:56,016 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2018-09-23 21:21:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:56,016 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-23 21:21:56,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:21:56,017 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-23 21:21:56,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 21:21:56,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:56,017 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-23 21:21:56,018 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:56,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:56,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1490448497, now seen corresponding path program 23 times [2018-09-23 21:21:56,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:56,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:56,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:56,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:56,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:56,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:56,496 INFO L227 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 [2018-09-23 21:21:56,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:56,557 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:21:56,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:56,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:56,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:56,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:21:56,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:21:56,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:21:56,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:21:56,594 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2018-09-23 21:21:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:57,068 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-09-23 21:21:57,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:21:57,069 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-09-23 21:21:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:57,069 INFO L225 Difference]: With dead ends: 130 [2018-09-23 21:21:57,070 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:21:57,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:21:57,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:21:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:21:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:21:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-23 21:21:57,078 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2018-09-23 21:21:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:57,078 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-23 21:21:57,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:21:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-23 21:21:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:21:57,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:57,079 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2018-09-23 21:21:57,079 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:57,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:57,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1188334966, now seen corresponding path program 24 times [2018-09-23 21:21:57,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:57,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:57,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:57,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:57,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:57,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:57,291 INFO L227 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 [2018-09-23 21:21:57,298 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:57,339 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:21:57,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:57,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:57,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:57,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:21:57,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:21:57,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:21:57,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:21:57,388 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 16 states. [2018-09-23 21:21:57,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:57,506 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2018-09-23 21:21:57,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:21:57,507 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2018-09-23 21:21:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:57,508 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:21:57,508 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:21:57,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:21:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:21:57,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-23 21:21:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:21:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-23 21:21:57,516 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2018-09-23 21:21:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:57,516 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-23 21:21:57,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:21:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-23 21:21:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:21:57,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:57,517 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-09-23 21:21:57,518 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:57,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1190013460, now seen corresponding path program 25 times [2018-09-23 21:21:57,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:57,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:57,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:57,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:57,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:58,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:58,158 INFO L227 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 [2018-09-23 21:21:58,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:58,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:58,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:58,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:21:58,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:21:58,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:21:58,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:21:58,254 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2018-09-23 21:21:59,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:59,010 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-23 21:21:59,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:21:59,010 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2018-09-23 21:21:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:59,012 INFO L225 Difference]: With dead ends: 139 [2018-09-23 21:21:59,012 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 21:21:59,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:21:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 21:21:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 21:21:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:21:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-23 21:21:59,021 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2018-09-23 21:21:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:59,021 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-23 21:21:59,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:21:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-23 21:21:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:21:59,022 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:59,022 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2018-09-23 21:21:59,023 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:59,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:59,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1746112411, now seen corresponding path program 26 times [2018-09-23 21:21:59,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:59,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:59,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:59,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:59,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:59,758 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:59,758 INFO L227 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 [2018-09-23 21:21:59,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:59,802 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:59,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:59,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:59,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:59,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:21:59,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:21:59,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:21:59,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:21:59,835 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 17 states. [2018-09-23 21:21:59,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:59,916 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-09-23 21:21:59,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:21:59,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-09-23 21:21:59,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:59,918 INFO L225 Difference]: With dead ends: 90 [2018-09-23 21:21:59,918 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 21:21:59,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:21:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 21:21:59,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-09-23 21:21:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:21:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-23 21:21:59,926 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2018-09-23 21:21:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:59,927 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-23 21:21:59,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:21:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-23 21:21:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 21:21:59,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:59,928 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-23 21:21:59,928 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:59,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:59,928 INFO L82 PathProgramCache]: Analyzing trace with hash 613460315, now seen corresponding path program 27 times [2018-09-23 21:21:59,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:59,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:59,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:59,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:59,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:00,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:00,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:00,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:00,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:22:00,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:00,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:00,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:00,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:22:00,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:22:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:22:00,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:22:00,452 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2018-09-23 21:22:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:01,354 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2018-09-23 21:22:01,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:22:01,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-09-23 21:22:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:01,356 INFO L225 Difference]: With dead ends: 148 [2018-09-23 21:22:01,356 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:22:01,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:22:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:22:01,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:22:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:22:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-23 21:22:01,362 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2018-09-23 21:22:01,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:01,362 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-23 21:22:01,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:22:01,363 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-23 21:22:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:22:01,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:01,363 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2018-09-23 21:22:01,363 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:01,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:01,364 INFO L82 PathProgramCache]: Analyzing trace with hash 381727362, now seen corresponding path program 28 times [2018-09-23 21:22:01,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:01,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:01,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:01,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:01,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:01,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:01,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:01,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:01,624 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:01,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:01,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:01,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:01,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:22:01,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:22:01,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:22:01,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:01,663 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 18 states. [2018-09-23 21:22:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:01,747 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2018-09-23 21:22:01,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:22:01,748 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2018-09-23 21:22:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:01,748 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:22:01,748 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:22:01,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:22:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-09-23 21:22:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:22:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-23 21:22:01,756 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2018-09-23 21:22:01,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:01,756 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-23 21:22:01,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:22:01,756 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-23 21:22:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:22:01,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:01,757 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-23 21:22:01,757 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:01,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1123248904, now seen corresponding path program 29 times [2018-09-23 21:22:01,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:01,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:01,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:01,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:02,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:02,672 INFO L227 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 [2018-09-23 21:22:02,680 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:02,872 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 21:22:02,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:02,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:02,888 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:02,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:02,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:22:02,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:22:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:22:02,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:22:02,910 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 34 states. [2018-09-23 21:22:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:03,829 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-23 21:22:03,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:22:03,829 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2018-09-23 21:22:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:03,830 INFO L225 Difference]: With dead ends: 157 [2018-09-23 21:22:03,830 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 21:22:03,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:22:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 21:22:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 21:22:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:22:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-23 21:22:03,840 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2018-09-23 21:22:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:03,840 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-23 21:22:03,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:22:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-23 21:22:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:22:03,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:03,841 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2018-09-23 21:22:03,841 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:03,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:03,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1191652401, now seen corresponding path program 30 times [2018-09-23 21:22:03,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:03,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:03,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:03,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:03,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:04,241 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:04,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:04,241 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:04,249 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:04,306 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 21:22:04,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:04,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:04,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:04,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:22:04,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:22:04,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:22:04,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:04,353 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2018-09-23 21:22:04,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:04,463 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2018-09-23 21:22:04,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:22:04,463 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-09-23 21:22:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:04,464 INFO L225 Difference]: With dead ends: 100 [2018-09-23 21:22:04,464 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 21:22:04,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 21:22:04,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-09-23 21:22:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 21:22:04,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-23 21:22:04,474 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2018-09-23 21:22:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:04,474 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-23 21:22:04,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:22:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-23 21:22:04,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 21:22:04,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:04,475 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-23 21:22:04,475 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:04,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:04,476 INFO L82 PathProgramCache]: Analyzing trace with hash 219193127, now seen corresponding path program 31 times [2018-09-23 21:22:04,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:04,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:04,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:04,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:04,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:05,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:05,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:05,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:05,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:05,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:05,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:22:05,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:22:05,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:22:05,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:22:05,917 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 36 states. [2018-09-23 21:22:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:06,683 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2018-09-23 21:22:06,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:22:06,683 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-09-23 21:22:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:06,685 INFO L225 Difference]: With dead ends: 166 [2018-09-23 21:22:06,685 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:22:06,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:22:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:22:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:22:06,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:22:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-23 21:22:06,696 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2018-09-23 21:22:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:06,696 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-23 21:22:06,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:22:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-23 21:22:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:22:06,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:06,697 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2018-09-23 21:22:06,697 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:06,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:06,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1134517362, now seen corresponding path program 32 times [2018-09-23 21:22:06,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:06,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:06,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:06,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:06,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:06,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:06,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:06,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:07,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:07,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:07,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:07,030 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:07,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:07,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:22:07,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:22:07,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:22:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:22:07,053 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 20 states. [2018-09-23 21:22:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:07,166 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-09-23 21:22:07,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:22:07,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2018-09-23 21:22:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:07,167 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:22:07,167 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:22:07,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:22:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:22:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-23 21:22:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:22:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-23 21:22:07,176 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2018-09-23 21:22:07,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:07,176 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-23 21:22:07,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:22:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-23 21:22:07,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:22:07,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:07,177 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-09-23 21:22:07,178 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:07,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:07,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1074454524, now seen corresponding path program 33 times [2018-09-23 21:22:07,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:07,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:07,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:07,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:07,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:07,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:07,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:07,660 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:07,721 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:22:07,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:07,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:07,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:07,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:22:07,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:22:07,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:22:07,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:22:07,761 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 38 states. [2018-09-23 21:22:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:09,031 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-23 21:22:09,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:22:09,032 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-09-23 21:22:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:09,032 INFO L225 Difference]: With dead ends: 175 [2018-09-23 21:22:09,032 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 21:22:09,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:22:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 21:22:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 21:22:09,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 21:22:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-23 21:22:09,041 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2018-09-23 21:22:09,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:09,041 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-23 21:22:09,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:22:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-23 21:22:09,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 21:22:09,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:09,042 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2018-09-23 21:22:09,042 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:09,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1513438211, now seen corresponding path program 34 times [2018-09-23 21:22:09,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:09,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:09,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:09,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:09,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:09,382 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:09,382 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:09,389 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:09,438 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:09,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:09,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:09,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:09,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:22:09,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:22:09,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:22:09,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:22:09,477 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2018-09-23 21:22:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:09,608 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2018-09-23 21:22:09,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:22:09,609 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2018-09-23 21:22:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:09,609 INFO L225 Difference]: With dead ends: 110 [2018-09-23 21:22:09,609 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:22:09,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:22:09,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:22:09,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-09-23 21:22:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:22:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-23 21:22:09,618 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2018-09-23 21:22:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:09,618 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-23 21:22:09,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:22:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-23 21:22:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 21:22:09,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:09,619 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-23 21:22:09,619 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:09,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:09,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1385467661, now seen corresponding path program 35 times [2018-09-23 21:22:09,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:09,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:09,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:09,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:09,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:11,389 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:11,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:11,397 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:11,465 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:22:11,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:11,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:11,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:11,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:22:11,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:22:11,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:22:11,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:22:11,515 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2018-09-23 21:22:12,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:12,214 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2018-09-23 21:22:12,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:22:12,214 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-09-23 21:22:12,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:12,215 INFO L225 Difference]: With dead ends: 184 [2018-09-23 21:22:12,215 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:22:12,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:22:12,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:22:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:22:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:22:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-23 21:22:12,224 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2018-09-23 21:22:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:12,224 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-23 21:22:12,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:22:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-23 21:22:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:22:12,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:12,225 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2018-09-23 21:22:12,226 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:12,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:12,226 INFO L82 PathProgramCache]: Analyzing trace with hash -209035110, now seen corresponding path program 36 times [2018-09-23 21:22:12,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:12,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:12,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:12,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:12,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:12,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:12,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:12,671 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:12,736 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:22:12,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:12,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:12,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:12,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:22:12,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:22:12,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:22:12,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:22:12,779 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 22 states. [2018-09-23 21:22:12,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:12,953 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2018-09-23 21:22:12,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:22:12,953 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2018-09-23 21:22:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:12,954 INFO L225 Difference]: With dead ends: 115 [2018-09-23 21:22:12,954 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 21:22:12,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:22:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 21:22:12,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-09-23 21:22:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 21:22:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-23 21:22:12,963 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2018-09-23 21:22:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:12,963 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-23 21:22:12,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:22:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-23 21:22:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:22:12,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:12,964 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-09-23 21:22:12,964 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:12,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1566476528, now seen corresponding path program 37 times [2018-09-23 21:22:12,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:12,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:12,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:12,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:12,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:13,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:13,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:13,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:13,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:13,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:13,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:13,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:22:13,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:22:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:22:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:22:13,687 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 42 states. [2018-09-23 21:22:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:15,170 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-23 21:22:15,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:22:15,171 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2018-09-23 21:22:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:15,171 INFO L225 Difference]: With dead ends: 193 [2018-09-23 21:22:15,171 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 21:22:15,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:22:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 21:22:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 21:22:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 21:22:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-23 21:22:15,192 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2018-09-23 21:22:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:15,193 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-23 21:22:15,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:22:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-23 21:22:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 21:22:15,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:15,194 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2018-09-23 21:22:15,194 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:15,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:15,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546761, now seen corresponding path program 38 times [2018-09-23 21:22:15,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:15,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:15,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:15,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:16,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:16,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:16,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:16,383 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:16,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:16,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:16,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:16,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:22:16,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:22:16,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:22:16,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:22:16,441 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 23 states. [2018-09-23 21:22:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:16,603 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-09-23 21:22:16,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:22:16,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 103 [2018-09-23 21:22:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:16,604 INFO L225 Difference]: With dead ends: 120 [2018-09-23 21:22:16,604 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 21:22:16,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:22:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 21:22:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-09-23 21:22:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 21:22:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-23 21:22:16,617 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2018-09-23 21:22:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:16,617 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-23 21:22:16,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:22:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-23 21:22:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 21:22:16,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:16,618 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-09-23 21:22:16,618 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:16,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:16,619 INFO L82 PathProgramCache]: Analyzing trace with hash -756867393, now seen corresponding path program 39 times [2018-09-23 21:22:16,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:16,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:16,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:16,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:16,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:17,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:17,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:17,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:17,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:22:17,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:17,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:17,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:17,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:22:17,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:22:17,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:22:17,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:22:17,712 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 44 states. [2018-09-23 21:22:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:20,111 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2018-09-23 21:22:20,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:22:20,111 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-09-23 21:22:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:20,112 INFO L225 Difference]: With dead ends: 202 [2018-09-23 21:22:20,112 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:22:20,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:22:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:22:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 21:22:20,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 21:22:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-23 21:22:20,123 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2018-09-23 21:22:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:20,123 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-23 21:22:20,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:22:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-23 21:22:20,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:22:20,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:20,124 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2018-09-23 21:22:20,124 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:20,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash 798222758, now seen corresponding path program 40 times [2018-09-23 21:22:20,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:20,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:20,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:20,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:20,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:20,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:20,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:20,439 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:20,486 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:20,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:20,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:20,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:20,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:22:20,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:22:20,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:22:20,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:22:20,530 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 24 states. [2018-09-23 21:22:20,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:20,649 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-09-23 21:22:20,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:22:20,650 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-09-23 21:22:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:20,650 INFO L225 Difference]: With dead ends: 125 [2018-09-23 21:22:20,650 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 21:22:20,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:22:20,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 21:22:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-23 21:22:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 21:22:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-23 21:22:20,663 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2018-09-23 21:22:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:20,664 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-23 21:22:20,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:22:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-23 21:22:20,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 21:22:20,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:20,665 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-09-23 21:22:20,665 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:20,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:20,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1030199836, now seen corresponding path program 41 times [2018-09-23 21:22:20,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:20,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:20,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:20,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:20,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:21,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:21,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:21,911 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:21,977 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 21:22:21,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:21,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:22,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:22,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:22:22,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:22:22,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:22:22,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:22:22,021 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 46 states. [2018-09-23 21:22:23,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:23,043 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-23 21:22:23,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:22:23,043 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 112 [2018-09-23 21:22:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:23,044 INFO L225 Difference]: With dead ends: 211 [2018-09-23 21:22:23,044 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 21:22:23,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:22:23,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 21:22:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 21:22:23,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 21:22:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-23 21:22:23,059 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2018-09-23 21:22:23,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:23,059 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-23 21:22:23,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:22:23,059 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-23 21:22:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 21:22:23,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:23,060 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2018-09-23 21:22:23,060 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:23,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:23,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1949005931, now seen corresponding path program 42 times [2018-09-23 21:22:23,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:23,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:23,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:23,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:23,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:23,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:23,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:23,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:23,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 21:22:23,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:23,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:24,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:24,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:22:24,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:22:24,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:22:24,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:22:24,051 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 25 states. [2018-09-23 21:22:24,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:24,357 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2018-09-23 21:22:24,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:22:24,358 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2018-09-23 21:22:24,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:24,359 INFO L225 Difference]: With dead ends: 130 [2018-09-23 21:22:24,359 INFO L226 Difference]: Without dead ends: 124 [2018-09-23 21:22:24,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:22:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-23 21:22:24,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-09-23 21:22:24,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-23 21:22:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-23 21:22:24,373 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2018-09-23 21:22:24,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:24,373 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-23 21:22:24,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:22:24,373 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-23 21:22:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-23 21:22:24,374 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:24,374 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-09-23 21:22:24,374 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:24,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:24,374 INFO L82 PathProgramCache]: Analyzing trace with hash 725198987, now seen corresponding path program 43 times [2018-09-23 21:22:24,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:24,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:24,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:24,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:24,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:25,793 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:25,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:25,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:25,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:25,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:25,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:22:25,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:22:25,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:22:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:22:25,910 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 48 states. [2018-09-23 21:22:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:27,421 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2018-09-23 21:22:27,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:22:27,421 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-09-23 21:22:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:27,422 INFO L225 Difference]: With dead ends: 220 [2018-09-23 21:22:27,422 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 21:22:27,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:22:27,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 21:22:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 21:22:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 21:22:27,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-23 21:22:27,432 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2018-09-23 21:22:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:27,432 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-23 21:22:27,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:22:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-23 21:22:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 21:22:27,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:27,433 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2018-09-23 21:22:27,433 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:27,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:27,434 INFO L82 PathProgramCache]: Analyzing trace with hash 995311282, now seen corresponding path program 44 times [2018-09-23 21:22:27,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:27,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:27,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:27,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:27,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:27,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:27,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:27,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:27,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:27,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:27,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:27,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:22:27,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:22:27,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:22:27,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:22:27,979 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2018-09-23 21:22:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:28,122 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-09-23 21:22:28,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:22:28,122 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2018-09-23 21:22:28,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:28,123 INFO L225 Difference]: With dead ends: 135 [2018-09-23 21:22:28,124 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 21:22:28,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:22:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 21:22:28,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2018-09-23 21:22:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 21:22:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-23 21:22:28,135 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2018-09-23 21:22:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:28,136 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-23 21:22:28,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:22:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-23 21:22:28,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 21:22:28,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:28,137 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-09-23 21:22:28,137 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:28,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1935656, now seen corresponding path program 45 times [2018-09-23 21:22:28,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:28,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:28,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:28,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:28,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:28,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:28,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:28,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:29,047 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:22:29,047 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:29,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:29,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:29,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:22:29,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:22:29,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:22:29,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:22:29,112 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 50 states. [2018-09-23 21:22:30,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:30,347 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-23 21:22:30,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:22:30,348 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-09-23 21:22:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:30,348 INFO L225 Difference]: With dead ends: 229 [2018-09-23 21:22:30,348 INFO L226 Difference]: Without dead ends: 126 [2018-09-23 21:22:30,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:22:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-23 21:22:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-23 21:22:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-23 21:22:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-09-23 21:22:30,363 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 122 [2018-09-23 21:22:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:30,363 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-09-23 21:22:30,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:22:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-09-23 21:22:30,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-23 21:22:30,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:30,364 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2018-09-23 21:22:30,364 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:30,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:30,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1360966497, now seen corresponding path program 46 times [2018-09-23 21:22:30,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:30,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:30,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:30,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:30,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:30,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:30,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:30,975 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:30,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:30,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:31,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:31,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:22:31,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:22:31,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:22:31,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:22:31,030 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2018-09-23 21:22:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:31,172 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-09-23 21:22:31,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:22:31,173 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2018-09-23 21:22:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:31,173 INFO L225 Difference]: With dead ends: 140 [2018-09-23 21:22:31,174 INFO L226 Difference]: Without dead ends: 134 [2018-09-23 21:22:31,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:22:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-23 21:22:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-09-23 21:22:31,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-23 21:22:31,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-23 21:22:31,184 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2018-09-23 21:22:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:31,185 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-23 21:22:31,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:22:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-23 21:22:31,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-23 21:22:31,185 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:31,185 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-09-23 21:22:31,186 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:31,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:31,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1531900329, now seen corresponding path program 47 times [2018-09-23 21:22:31,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:31,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:31,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:31,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:31,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:32,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:32,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:32,334 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:32,413 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:22:32,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:32,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:32,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:32,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:22:32,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:22:32,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:22:32,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:22:32,458 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 52 states. [2018-09-23 21:22:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:33,799 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2018-09-23 21:22:33,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:22:33,799 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-09-23 21:22:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:33,800 INFO L225 Difference]: With dead ends: 238 [2018-09-23 21:22:33,800 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 21:22:33,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:22:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 21:22:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 21:22:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 21:22:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-23 21:22:33,811 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2018-09-23 21:22:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:33,811 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-23 21:22:33,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:22:33,812 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-23 21:22:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 21:22:33,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:33,812 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2018-09-23 21:22:33,813 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:33,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -652320834, now seen corresponding path program 48 times [2018-09-23 21:22:33,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:33,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:33,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:33,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:33,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:34,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:34,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:34,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:34,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:22:34,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:34,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:34,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:34,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:22:34,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:22:34,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:22:34,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:22:34,949 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 28 states. [2018-09-23 21:22:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:35,136 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-09-23 21:22:35,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:22:35,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 128 [2018-09-23 21:22:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:35,137 INFO L225 Difference]: With dead ends: 145 [2018-09-23 21:22:35,137 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 21:22:35,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:22:35,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 21:22:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-23 21:22:35,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 21:22:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-23 21:22:35,153 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2018-09-23 21:22:35,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:35,153 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-23 21:22:35,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:22:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-23 21:22:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 21:22:35,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:35,154 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-09-23 21:22:35,154 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:35,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:35,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1843837900, now seen corresponding path program 49 times [2018-09-23 21:22:35,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:35,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:35,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:35,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:35,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:36,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:36,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:36,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:36,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:36,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:36,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:22:36,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:22:36,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:22:36,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:22:36,363 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 54 states. [2018-09-23 21:22:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:38,086 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-09-23 21:22:38,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:22:38,086 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 132 [2018-09-23 21:22:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:38,087 INFO L225 Difference]: With dead ends: 247 [2018-09-23 21:22:38,087 INFO L226 Difference]: Without dead ends: 136 [2018-09-23 21:22:38,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:22:38,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-23 21:22:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-23 21:22:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-23 21:22:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-23 21:22:38,099 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-09-23 21:22:38,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:38,099 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-23 21:22:38,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:22:38,099 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-23 21:22:38,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-23 21:22:38,099 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:38,100 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2018-09-23 21:22:38,100 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:38,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:38,100 INFO L82 PathProgramCache]: Analyzing trace with hash 35240749, now seen corresponding path program 50 times [2018-09-23 21:22:38,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:38,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:38,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:38,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:38,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:38,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:38,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:38,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:38,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:38,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:38,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:38,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:38,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:38,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:22:38,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:22:38,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:22:38,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:22:38,897 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 29 states. [2018-09-23 21:22:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:39,727 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-09-23 21:22:39,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:22:39,728 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2018-09-23 21:22:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:39,728 INFO L225 Difference]: With dead ends: 150 [2018-09-23 21:22:39,728 INFO L226 Difference]: Without dead ends: 144 [2018-09-23 21:22:39,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:22:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-23 21:22:39,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2018-09-23 21:22:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-23 21:22:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-23 21:22:39,746 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2018-09-23 21:22:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:39,746 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-23 21:22:39,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:22:39,746 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-23 21:22:39,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-23 21:22:39,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:39,747 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-09-23 21:22:39,747 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:39,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:39,748 INFO L82 PathProgramCache]: Analyzing trace with hash -838119389, now seen corresponding path program 51 times [2018-09-23 21:22:39,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:39,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:39,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:39,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:40,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:40,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:40,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:40,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 21:22:40,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:40,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:40,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:40,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:22:40,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:22:40,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:22:40,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:22:40,805 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 56 states. [2018-09-23 21:22:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:42,426 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2018-09-23 21:22:42,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:22:42,426 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-09-23 21:22:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:42,427 INFO L225 Difference]: With dead ends: 256 [2018-09-23 21:22:42,427 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 21:22:42,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:22:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 21:22:42,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 21:22:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 21:22:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-23 21:22:42,443 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2018-09-23 21:22:42,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:42,444 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-23 21:22:42,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:22:42,444 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-23 21:22:42,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 21:22:42,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:42,445 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2018-09-23 21:22:42,445 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:42,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:42,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1657490634, now seen corresponding path program 52 times [2018-09-23 21:22:42,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:42,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:42,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:42,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:42,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:42,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:42,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:42,867 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:42,929 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:42,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:42,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:42,994 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:42,994 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:22:42,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:22:42,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:22:42,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:22:42,995 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 30 states. [2018-09-23 21:22:43,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:43,168 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2018-09-23 21:22:43,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:22:43,168 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 138 [2018-09-23 21:22:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:43,169 INFO L225 Difference]: With dead ends: 155 [2018-09-23 21:22:43,169 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 21:22:43,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:22:43,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 21:22:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-09-23 21:22:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 21:22:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-23 21:22:43,181 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2018-09-23 21:22:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:43,182 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-23 21:22:43,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:22:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-23 21:22:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 21:22:43,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:43,183 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-09-23 21:22:43,183 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:43,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:43,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1915800384, now seen corresponding path program 53 times [2018-09-23 21:22:43,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:43,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:43,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:43,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:43,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:44,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:44,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:44,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:44,285 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:22:44,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:44,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:44,353 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:44,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:22:44,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:22:44,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:22:44,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:22:44,355 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 58 states. [2018-09-23 21:22:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:46,144 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-09-23 21:22:46,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:22:46,144 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2018-09-23 21:22:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:46,145 INFO L225 Difference]: With dead ends: 265 [2018-09-23 21:22:46,145 INFO L226 Difference]: Without dead ends: 146 [2018-09-23 21:22:46,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:22:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-23 21:22:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-23 21:22:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-23 21:22:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-09-23 21:22:46,158 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 142 [2018-09-23 21:22:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:46,159 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-09-23 21:22:46,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:22:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-09-23 21:22:46,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-23 21:22:46,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:46,160 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2018-09-23 21:22:46,160 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:46,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:46,160 INFO L82 PathProgramCache]: Analyzing trace with hash 520593145, now seen corresponding path program 54 times [2018-09-23 21:22:46,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:46,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:46,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:46,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:46,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:46,604 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:46,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:46,611 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:46,716 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 21:22:46,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:46,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:46,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:46,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:22:46,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:22:46,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:22:46,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:22:46,789 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 31 states. [2018-09-23 21:22:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:47,101 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2018-09-23 21:22:47,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:22:47,101 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2018-09-23 21:22:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:47,102 INFO L225 Difference]: With dead ends: 160 [2018-09-23 21:22:47,102 INFO L226 Difference]: Without dead ends: 154 [2018-09-23 21:22:47,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:22:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-23 21:22:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-09-23 21:22:47,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-23 21:22:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-09-23 21:22:47,114 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2018-09-23 21:22:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:47,114 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-09-23 21:22:47,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:22:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-09-23 21:22:47,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-23 21:22:47,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:47,115 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-09-23 21:22:47,115 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:47,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:47,116 INFO L82 PathProgramCache]: Analyzing trace with hash 915041775, now seen corresponding path program 55 times [2018-09-23 21:22:47,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:47,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:47,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:47,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:47,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:48,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:48,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:48,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:48,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:48,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:48,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:22:48,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:22:48,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:22:48,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:22:48,335 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 60 states. [2018-09-23 21:22:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:50,625 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2018-09-23 21:22:50,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:22:50,625 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2018-09-23 21:22:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:50,626 INFO L225 Difference]: With dead ends: 274 [2018-09-23 21:22:50,626 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 21:22:50,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:22:50,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 21:22:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 21:22:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 21:22:50,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-23 21:22:50,642 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2018-09-23 21:22:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:50,642 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-23 21:22:50,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:22:50,642 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-23 21:22:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 21:22:50,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:50,643 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2018-09-23 21:22:50,643 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:50,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:50,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1773143510, now seen corresponding path program 56 times [2018-09-23 21:22:50,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:50,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:50,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:50,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:50,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:51,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:51,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:51,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:51,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:51,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:51,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:51,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:51,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:22:51,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:22:51,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:22:51,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:22:51,289 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 32 states. [2018-09-23 21:22:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:51,478 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-09-23 21:22:51,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:22:51,485 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 148 [2018-09-23 21:22:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:51,486 INFO L225 Difference]: With dead ends: 165 [2018-09-23 21:22:51,486 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 21:22:51,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:22:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 21:22:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-23 21:22:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 21:22:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-23 21:22:51,503 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2018-09-23 21:22:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:51,503 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-23 21:22:51,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:22:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-23 21:22:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 21:22:51,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,504 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-09-23 21:22:51,504 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1766187444, now seen corresponding path program 57 times [2018-09-23 21:22:51,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:51,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:53,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:53,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:53,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:53,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 21:22:53,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:53,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:53,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:53,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:22:53,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:22:53,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:22:53,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:22:53,414 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 62 states. [2018-09-23 21:22:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:54,448 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-09-23 21:22:54,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:22:54,449 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-09-23 21:22:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:54,449 INFO L225 Difference]: With dead ends: 283 [2018-09-23 21:22:54,450 INFO L226 Difference]: Without dead ends: 156 [2018-09-23 21:22:54,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:22:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-23 21:22:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-23 21:22:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-23 21:22:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-09-23 21:22:54,468 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 152 [2018-09-23 21:22:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:54,468 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-09-23 21:22:54,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:22:54,468 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-09-23 21:22:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-23 21:22:54,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:54,469 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2018-09-23 21:22:54,469 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:54,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash -928358715, now seen corresponding path program 58 times [2018-09-23 21:22:54,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:54,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:54,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:54,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:54,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:54,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:54,977 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:55,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:55,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:55,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:55,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:55,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:22:55,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:22:55,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:22:55,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:22:55,114 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 33 states. [2018-09-23 21:22:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:55,357 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2018-09-23 21:22:55,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:22:55,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2018-09-23 21:22:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:55,358 INFO L225 Difference]: With dead ends: 170 [2018-09-23 21:22:55,358 INFO L226 Difference]: Without dead ends: 164 [2018-09-23 21:22:55,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:22:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-23 21:22:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-09-23 21:22:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-23 21:22:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-23 21:22:55,379 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2018-09-23 21:22:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:55,379 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-23 21:22:55,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:22:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-23 21:22:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-23 21:22:55,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:55,380 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-09-23 21:22:55,380 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:55,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash -839882821, now seen corresponding path program 59 times [2018-09-23 21:22:55,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:55,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:55,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:55,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:56,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:56,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:56,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:56,604 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 21:22:56,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:56,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:56,692 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:56,692 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:22:56,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:22:56,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:22:56,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:22:56,693 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 64 states. [2018-09-23 21:22:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:58,871 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2018-09-23 21:22:58,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:22:58,871 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 157 [2018-09-23 21:22:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:58,872 INFO L225 Difference]: With dead ends: 292 [2018-09-23 21:22:58,872 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 21:22:58,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:22:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 21:22:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 21:22:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 21:22:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-23 21:22:58,892 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2018-09-23 21:22:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:58,892 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-23 21:22:58,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:22:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-23 21:22:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 21:22:58,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:58,893 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2018-09-23 21:22:58,894 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:58,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:58,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1453492962, now seen corresponding path program 60 times [2018-09-23 21:22:58,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:58,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:58,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:58,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:59,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:59,401 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:59,417 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:59,648 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:22:59,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:59,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:59,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:59,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:22:59,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:22:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:22:59,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:22:59,699 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 34 states. [2018-09-23 21:22:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:59,883 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-09-23 21:22:59,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:22:59,883 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 158 [2018-09-23 21:22:59,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:59,885 INFO L225 Difference]: With dead ends: 175 [2018-09-23 21:22:59,885 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 21:22:59,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:22:59,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 21:22:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-09-23 21:22:59,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 21:22:59,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-23 21:22:59,906 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2018-09-23 21:22:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:59,906 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-23 21:22:59,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:22:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-23 21:22:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 21:22:59,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:59,907 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-09-23 21:22:59,907 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:59,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:59,908 INFO L82 PathProgramCache]: Analyzing trace with hash 227229016, now seen corresponding path program 61 times [2018-09-23 21:22:59,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:59,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:59,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:59,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:01,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:01,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:01,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:01,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:01,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:01,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:23:01,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:23:01,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:23:01,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:23:01,346 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 66 states. [2018-09-23 21:23:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:03,458 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-09-23 21:23:03,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:23:03,458 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 162 [2018-09-23 21:23:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:03,459 INFO L225 Difference]: With dead ends: 301 [2018-09-23 21:23:03,459 INFO L226 Difference]: Without dead ends: 166 [2018-09-23 21:23:03,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:23:03,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-23 21:23:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-23 21:23:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-23 21:23:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-23 21:23:03,478 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 162 [2018-09-23 21:23:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:03,479 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-23 21:23:03,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:23:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-23 21:23:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-23 21:23:03,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:03,480 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2018-09-23 21:23:03,480 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:03,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:03,480 INFO L82 PathProgramCache]: Analyzing trace with hash 541325969, now seen corresponding path program 62 times [2018-09-23 21:23:03,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:03,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:03,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:03,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:04,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:04,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:04,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:04,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:04,108 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:04,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:04,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:04,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:23:04,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:23:04,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:23:04,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:23:04,162 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 35 states. [2018-09-23 21:23:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:04,349 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2018-09-23 21:23:04,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:23:04,349 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2018-09-23 21:23:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:04,350 INFO L225 Difference]: With dead ends: 180 [2018-09-23 21:23:04,350 INFO L226 Difference]: Without dead ends: 174 [2018-09-23 21:23:04,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:23:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-23 21:23:04,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2018-09-23 21:23:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-23 21:23:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-09-23 21:23:04,366 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2018-09-23 21:23:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:04,366 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-09-23 21:23:04,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:23:04,367 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-09-23 21:23:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-23 21:23:04,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:04,368 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-09-23 21:23:04,368 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:04,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1149189511, now seen corresponding path program 63 times [2018-09-23 21:23:04,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:04,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:04,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:04,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:05,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:05,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:05,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:06,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 21:23:06,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:06,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:06,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:06,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:23:06,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:23:06,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:23:06,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:23:06,087 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 68 states. [2018-09-23 21:23:08,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:08,608 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2018-09-23 21:23:08,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:23:08,609 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 167 [2018-09-23 21:23:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:08,610 INFO L225 Difference]: With dead ends: 310 [2018-09-23 21:23:08,610 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 21:23:08,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:23:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 21:23:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-23 21:23:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 21:23:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-23 21:23:08,627 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-09-23 21:23:08,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:08,627 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-23 21:23:08,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:23:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-23 21:23:08,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 21:23:08,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:08,628 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2018-09-23 21:23:08,628 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:08,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:08,629 INFO L82 PathProgramCache]: Analyzing trace with hash 167304174, now seen corresponding path program 64 times [2018-09-23 21:23:08,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:08,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:08,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:08,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:09,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:09,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:09,227 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:09,309 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:09,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:09,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:09,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:09,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:23:09,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:23:09,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:23:09,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:23:09,372 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 36 states. [2018-09-23 21:23:09,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:09,588 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2018-09-23 21:23:09,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:23:09,588 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 168 [2018-09-23 21:23:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:09,590 INFO L225 Difference]: With dead ends: 185 [2018-09-23 21:23:09,590 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 21:23:09,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:23:09,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 21:23:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-23 21:23:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 21:23:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-23 21:23:09,610 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2018-09-23 21:23:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:09,611 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-23 21:23:09,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:23:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-23 21:23:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 21:23:09,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:09,612 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-09-23 21:23:09,612 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:09,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:09,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1678104476, now seen corresponding path program 65 times [2018-09-23 21:23:09,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:09,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:09,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:09,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:09,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:11,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:11,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:11,013 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:11,124 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 21:23:11,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:11,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:11,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:11,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:23:11,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:23:11,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:23:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:23:11,205 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 70 states. [2018-09-23 21:23:13,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:13,910 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-09-23 21:23:13,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:23:13,910 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 172 [2018-09-23 21:23:13,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:13,911 INFO L225 Difference]: With dead ends: 319 [2018-09-23 21:23:13,911 INFO L226 Difference]: Without dead ends: 176 [2018-09-23 21:23:13,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:23:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-23 21:23:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-23 21:23:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-23 21:23:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-23 21:23:13,932 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 172 [2018-09-23 21:23:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:13,933 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-23 21:23:13,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:23:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-23 21:23:13,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-23 21:23:13,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:13,934 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2018-09-23 21:23:13,934 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:13,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:13,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1483312547, now seen corresponding path program 66 times [2018-09-23 21:23:13,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:13,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:13,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:13,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:14,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:14,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:14,508 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:14,627 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 21:23:14,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:14,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:14,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:14,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:14,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:23:14,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:23:14,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:23:14,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:23:14,684 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 37 states. [2018-09-23 21:23:14,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:14,890 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2018-09-23 21:23:14,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:23:14,890 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 173 [2018-09-23 21:23:14,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:14,891 INFO L225 Difference]: With dead ends: 190 [2018-09-23 21:23:14,891 INFO L226 Difference]: Without dead ends: 184 [2018-09-23 21:23:14,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:23:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-23 21:23:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-09-23 21:23:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-23 21:23:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-09-23 21:23:14,911 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 173 [2018-09-23 21:23:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:14,912 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-09-23 21:23:14,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:23:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-09-23 21:23:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-23 21:23:14,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:14,913 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-09-23 21:23:14,913 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:14,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:14,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1794699091, now seen corresponding path program 67 times [2018-09-23 21:23:14,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:14,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:14,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:14,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:14,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:16,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:16,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:16,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:16,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:16,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:16,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:23:16,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:23:16,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:23:16,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:23:16,514 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 72 states. [2018-09-23 21:23:19,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:19,377 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2018-09-23 21:23:19,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:23:19,377 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 177 [2018-09-23 21:23:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:19,378 INFO L225 Difference]: With dead ends: 328 [2018-09-23 21:23:19,378 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 21:23:19,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:23:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 21:23:19,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 21:23:19,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 21:23:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-23 21:23:19,395 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2018-09-23 21:23:19,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:19,395 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-23 21:23:19,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:23:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-23 21:23:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 21:23:19,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:19,397 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2018-09-23 21:23:19,397 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:19,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:19,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2072574202, now seen corresponding path program 68 times [2018-09-23 21:23:19,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:19,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:19,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:19,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:19,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:20,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:20,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:20,058 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:20,143 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:20,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:20,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:20,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:20,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:23:20,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:23:20,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:23:20,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:23:20,198 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 38 states. [2018-09-23 21:23:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:20,415 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-09-23 21:23:20,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:23:20,416 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2018-09-23 21:23:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:20,416 INFO L225 Difference]: With dead ends: 195 [2018-09-23 21:23:20,416 INFO L226 Difference]: Without dead ends: 189 [2018-09-23 21:23:20,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:23:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-23 21:23:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2018-09-23 21:23:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 21:23:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-23 21:23:20,432 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2018-09-23 21:23:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:20,433 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-23 21:23:20,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:23:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-23 21:23:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 21:23:20,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:20,434 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-09-23 21:23:20,434 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:20,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1591533424, now seen corresponding path program 69 times [2018-09-23 21:23:20,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:20,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:20,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:20,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:20,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:21,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:21,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:21,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:22,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 21:23:22,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:22,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:22,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:22,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:23:22,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:23:22,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:23:22,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:23:22,205 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 74 states. [2018-09-23 21:23:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:25,097 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-09-23 21:23:25,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:23:25,097 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-09-23 21:23:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:25,098 INFO L225 Difference]: With dead ends: 337 [2018-09-23 21:23:25,098 INFO L226 Difference]: Without dead ends: 186 [2018-09-23 21:23:25,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:23:25,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-23 21:23:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-09-23 21:23:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-09-23 21:23:25,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2018-09-23 21:23:25,114 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 182 [2018-09-23 21:23:25,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:25,115 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2018-09-23 21:23:25,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:23:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2018-09-23 21:23:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-23 21:23:25,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:25,116 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2018-09-23 21:23:25,116 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:25,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:25,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1595685335, now seen corresponding path program 70 times [2018-09-23 21:23:25,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:25,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:25,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:25,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:25,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:25,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:25,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:25,854 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:25,942 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:25,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:25,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:26,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:26,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:23:26,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:23:26,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:23:26,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:23:26,028 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 39 states. [2018-09-23 21:23:26,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:26,252 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-09-23 21:23:26,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:23:26,252 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2018-09-23 21:23:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:26,253 INFO L225 Difference]: With dead ends: 200 [2018-09-23 21:23:26,253 INFO L226 Difference]: Without dead ends: 194 [2018-09-23 21:23:26,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:23:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-23 21:23:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-09-23 21:23:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-23 21:23:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-23 21:23:26,270 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2018-09-23 21:23:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:26,270 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-23 21:23:26,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:23:26,271 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-23 21:23:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-23 21:23:26,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:26,271 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-09-23 21:23:26,271 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:26,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:26,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1835041505, now seen corresponding path program 71 times [2018-09-23 21:23:26,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:26,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:26,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:26,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:26,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:28,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:28,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:28,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:28,213 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:28,327 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:23:28,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:28,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:28,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:28,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:28,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:23:28,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:23:28,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:23:28,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:23:28,385 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 76 states. [2018-09-23 21:23:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:31,148 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2018-09-23 21:23:31,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:23:31,149 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 187 [2018-09-23 21:23:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:31,149 INFO L225 Difference]: With dead ends: 346 [2018-09-23 21:23:31,149 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 21:23:31,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 21:23:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 21:23:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 21:23:31,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 21:23:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-23 21:23:31,173 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2018-09-23 21:23:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:31,174 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-23 21:23:31,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:23:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-23 21:23:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 21:23:31,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:31,175 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2018-09-23 21:23:31,175 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:31,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1521017350, now seen corresponding path program 72 times [2018-09-23 21:23:31,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:31,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:31,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:31,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:31,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:31,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:31,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:31,874 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:32,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:23:32,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:32,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:32,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:32,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:23:32,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:23:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:23:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:23:32,064 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 40 states. [2018-09-23 21:23:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:32,284 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-09-23 21:23:32,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:23:32,285 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 188 [2018-09-23 21:23:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:32,285 INFO L225 Difference]: With dead ends: 205 [2018-09-23 21:23:32,286 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 21:23:32,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:23:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 21:23:32,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-09-23 21:23:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 21:23:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-23 21:23:32,311 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2018-09-23 21:23:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:32,311 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-23 21:23:32,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:23:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-23 21:23:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-23 21:23:32,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:32,312 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-09-23 21:23:32,312 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:32,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:32,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1787388540, now seen corresponding path program 73 times [2018-09-23 21:23:32,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:32,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:32,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:32,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:34,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:34,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:34,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:34,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:34,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:34,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:23:34,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:23:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:23:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:23:34,531 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 78 states. [2018-09-23 21:23:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:36,843 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-09-23 21:23:36,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:23:36,843 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 192 [2018-09-23 21:23:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:36,844 INFO L225 Difference]: With dead ends: 355 [2018-09-23 21:23:36,844 INFO L226 Difference]: Without dead ends: 196 [2018-09-23 21:23:36,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-09-23 21:23:36,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-23 21:23:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-23 21:23:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-23 21:23:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-23 21:23:36,864 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 192 [2018-09-23 21:23:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:36,865 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-23 21:23:36,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:23:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-23 21:23:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-23 21:23:36,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:36,866 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2018-09-23 21:23:36,866 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:36,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:36,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1861088757, now seen corresponding path program 74 times [2018-09-23 21:23:36,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:36,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:36,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:36,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:36,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:37,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:37,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:37,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:37,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:37,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:37,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:37,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:37,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:23:37,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:23:37,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:23:37,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:23:37,716 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 41 states. [2018-09-23 21:23:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:37,955 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-09-23 21:23:37,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:23:37,955 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 193 [2018-09-23 21:23:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:37,956 INFO L225 Difference]: With dead ends: 210 [2018-09-23 21:23:37,956 INFO L226 Difference]: Without dead ends: 204 [2018-09-23 21:23:37,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:23:37,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-23 21:23:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-09-23 21:23:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-23 21:23:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-23 21:23:37,974 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 193 [2018-09-23 21:23:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:37,974 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-23 21:23:37,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:23:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-23 21:23:37,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-23 21:23:37,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:37,975 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-09-23 21:23:37,975 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:37,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:37,975 INFO L82 PathProgramCache]: Analyzing trace with hash -315300117, now seen corresponding path program 75 times [2018-09-23 21:23:37,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:37,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:37,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:37,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:37,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:39,877 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:39,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:39,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:40,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 21:23:40,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:40,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:40,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:40,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 21:23:40,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:23:40,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:23:40,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:23:40,152 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 80 states. [2018-09-23 21:23:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:43,477 INFO L93 Difference]: Finished difference Result 364 states and 368 transitions. [2018-09-23 21:23:43,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:23:43,478 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 197 [2018-09-23 21:23:43,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:43,479 INFO L225 Difference]: With dead ends: 364 [2018-09-23 21:23:43,479 INFO L226 Difference]: Without dead ends: 201 [2018-09-23 21:23:43,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-09-23 21:23:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-23 21:23:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-23 21:23:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-23 21:23:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-23 21:23:43,505 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2018-09-23 21:23:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:43,505 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-23 21:23:43,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:23:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-23 21:23:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 21:23:43,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:43,506 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1] [2018-09-23 21:23:43,506 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:43,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:43,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1372678382, now seen corresponding path program 76 times [2018-09-23 21:23:43,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:43,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:43,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:43,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:43,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:44,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:44,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:44,252 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:44,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:44,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:44,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:44,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:44,411 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:44,411 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:23:44,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:23:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:23:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:23:44,412 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 42 states. [2018-09-23 21:23:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:44,693 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2018-09-23 21:23:44,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:23:44,694 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 198 [2018-09-23 21:23:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:44,695 INFO L225 Difference]: With dead ends: 215 [2018-09-23 21:23:44,695 INFO L226 Difference]: Without dead ends: 209 [2018-09-23 21:23:44,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:23:44,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-23 21:23:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2018-09-23 21:23:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-23 21:23:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-23 21:23:44,721 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 198 [2018-09-23 21:23:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:44,722 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-23 21:23:44,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:23:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-23 21:23:44,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-23 21:23:44,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:44,723 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1] [2018-09-23 21:23:44,723 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:44,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:44,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1792389512, now seen corresponding path program 77 times [2018-09-23 21:23:44,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:44,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:44,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:44,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:44,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:46,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:46,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:46,585 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:46,720 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 21:23:46,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:46,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:46,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:46,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 21:23:46,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:23:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:23:46,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:23:46,785 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 82 states. [2018-09-23 21:23:49,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:49,450 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2018-09-23 21:23:49,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:23:49,450 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 202 [2018-09-23 21:23:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:49,451 INFO L225 Difference]: With dead ends: 373 [2018-09-23 21:23:49,451 INFO L226 Difference]: Without dead ends: 206 [2018-09-23 21:23:49,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-09-23 21:23:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-09-23 21:23:49,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-09-23 21:23:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-23 21:23:49,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-09-23 21:23:49,478 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-09-23 21:23:49,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:49,478 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-09-23 21:23:49,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:23:49,478 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-09-23 21:23:49,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-23 21:23:49,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:49,479 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 1, 1, 1, 1, 1] [2018-09-23 21:23:49,479 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:49,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:49,480 INFO L82 PathProgramCache]: Analyzing trace with hash -185138751, now seen corresponding path program 78 times [2018-09-23 21:23:49,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:49,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:49,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:49,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:49,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:50,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:50,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:50,270 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:50,408 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 21:23:50,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:50,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:50,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:50,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:23:50,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:23:50,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:23:50,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:23:50,471 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 43 states. [2018-09-23 21:23:50,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:50,746 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2018-09-23 21:23:50,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:23:50,752 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 203 [2018-09-23 21:23:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:50,753 INFO L225 Difference]: With dead ends: 220 [2018-09-23 21:23:50,753 INFO L226 Difference]: Without dead ends: 214 [2018-09-23 21:23:50,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:23:50,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-23 21:23:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2018-09-23 21:23:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-23 21:23:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2018-09-23 21:23:50,780 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 203 [2018-09-23 21:23:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:50,780 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2018-09-23 21:23:50,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:23:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2018-09-23 21:23:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-23 21:23:50,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:50,781 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1] [2018-09-23 21:23:50,782 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:50,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:50,782 INFO L82 PathProgramCache]: Analyzing trace with hash -319083337, now seen corresponding path program 79 times [2018-09-23 21:23:50,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:50,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:50,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:50,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:50,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:52,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:52,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:52,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:52,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:53,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:53,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 21:23:53,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:23:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:23:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:23:53,052 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 84 states. [2018-09-23 21:23:55,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:55,796 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2018-09-23 21:23:55,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 21:23:55,796 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 207 [2018-09-23 21:23:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:55,797 INFO L225 Difference]: With dead ends: 382 [2018-09-23 21:23:55,797 INFO L226 Difference]: Without dead ends: 211 [2018-09-23 21:23:55,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-09-23 21:23:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-23 21:23:55,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-23 21:23:55,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-23 21:23:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-23 21:23:55,817 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2018-09-23 21:23:55,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:55,817 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-23 21:23:55,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:23:55,817 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-23 21:23:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-23 21:23:55,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:55,818 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 1, 1, 1, 1, 1] [2018-09-23 21:23:55,818 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:55,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:55,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1953503262, now seen corresponding path program 80 times [2018-09-23 21:23:55,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:55,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:55,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:55,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:55,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:56,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:56,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:56,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:56,727 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:56,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:56,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:56,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:56,791 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:23:56,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:23:56,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:23:56,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:23:56,792 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 44 states. [2018-09-23 21:23:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:57,041 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-09-23 21:23:57,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:23:57,041 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 208 [2018-09-23 21:23:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:57,042 INFO L225 Difference]: With dead ends: 225 [2018-09-23 21:23:57,042 INFO L226 Difference]: Without dead ends: 219 [2018-09-23 21:23:57,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:23:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-23 21:23:57,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-09-23 21:23:57,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-23 21:23:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-23 21:23:57,062 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2018-09-23 21:23:57,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:57,062 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-23 21:23:57,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:23:57,062 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-23 21:23:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-23 21:23:57,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:57,063 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 1, 1, 1, 1, 1] [2018-09-23 21:23:57,063 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:57,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1125633172, now seen corresponding path program 81 times [2018-09-23 21:23:57,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:57,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:57,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:57,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:57,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:59,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:59,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:59,450 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:59,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 21:23:59,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:59,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:59,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:59,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 21:23:59,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:23:59,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:23:59,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:23:59,704 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 86 states. [2018-09-23 21:24:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:02,343 INFO L93 Difference]: Finished difference Result 391 states and 395 transitions. [2018-09-23 21:24:02,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 21:24:02,343 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-09-23 21:24:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:02,344 INFO L225 Difference]: With dead ends: 391 [2018-09-23 21:24:02,344 INFO L226 Difference]: Without dead ends: 216 [2018-09-23 21:24:02,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-09-23 21:24:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-09-23 21:24:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-09-23 21:24:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-09-23 21:24:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2018-09-23 21:24:02,366 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 212 [2018-09-23 21:24:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:02,367 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2018-09-23 21:24:02,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:24:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2018-09-23 21:24:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-23 21:24:02,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:02,368 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1] [2018-09-23 21:24:02,368 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:02,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:02,369 INFO L82 PathProgramCache]: Analyzing trace with hash -155129459, now seen corresponding path program 82 times [2018-09-23 21:24:02,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:02,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:02,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:02,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:02,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:03,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:03,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:03,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:03,297 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:03,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:03,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:03,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:03,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:24:03,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:24:03,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:24:03,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:24:03,366 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand 45 states. [2018-09-23 21:24:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:03,761 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2018-09-23 21:24:03,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:24:03,762 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 213 [2018-09-23 21:24:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:03,763 INFO L225 Difference]: With dead ends: 230 [2018-09-23 21:24:03,763 INFO L226 Difference]: Without dead ends: 224 [2018-09-23 21:24:03,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:24:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-09-23 21:24:03,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2018-09-23 21:24:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-23 21:24:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-09-23 21:24:03,786 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2018-09-23 21:24:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:03,786 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-09-23 21:24:03,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:24:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-09-23 21:24:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-23 21:24:03,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:03,787 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1] [2018-09-23 21:24:03,787 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:03,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:03,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1531687293, now seen corresponding path program 83 times [2018-09-23 21:24:03,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:03,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:03,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:03,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:03,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:03,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:06,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:06,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:06,036 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:06,182 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 21:24:06,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:06,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:06,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:06,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 21:24:06,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:24:06,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:24:06,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:24:06,251 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 88 states. [2018-09-23 21:24:09,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:09,247 INFO L93 Difference]: Finished difference Result 400 states and 404 transitions. [2018-09-23 21:24:09,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 21:24:09,247 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 217 [2018-09-23 21:24:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:09,248 INFO L225 Difference]: With dead ends: 400 [2018-09-23 21:24:09,248 INFO L226 Difference]: Without dead ends: 221 [2018-09-23 21:24:09,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-09-23 21:24:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-23 21:24:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-23 21:24:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-23 21:24:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-23 21:24:09,269 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2018-09-23 21:24:09,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:09,269 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-23 21:24:09,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:24:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-23 21:24:09,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-23 21:24:09,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:09,270 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1] [2018-09-23 21:24:09,271 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:09,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1128490282, now seen corresponding path program 84 times [2018-09-23 21:24:09,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:09,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:09,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:09,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:09,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:10,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:10,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:10,135 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:10,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 21:24:10,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:10,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:10,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:10,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:24:10,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:24:10,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:24:10,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:24:10,362 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 46 states. [2018-09-23 21:24:10,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:10,622 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2018-09-23 21:24:10,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:24:10,622 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 218 [2018-09-23 21:24:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:10,624 INFO L225 Difference]: With dead ends: 235 [2018-09-23 21:24:10,624 INFO L226 Difference]: Without dead ends: 229 [2018-09-23 21:24:10,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:24:10,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-23 21:24:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2018-09-23 21:24:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-23 21:24:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-23 21:24:10,645 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 218 [2018-09-23 21:24:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:10,645 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-23 21:24:10,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:24:10,645 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-23 21:24:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-23 21:24:10,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:10,646 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1] [2018-09-23 21:24:10,646 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:10,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:10,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1373260896, now seen corresponding path program 85 times [2018-09-23 21:24:10,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:10,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:10,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:10,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:12,865 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:12,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:12,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:12,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:13,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:13,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 21:24:13,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:24:13,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:24:13,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:24:13,045 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 90 states. [2018-09-23 21:24:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:16,131 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2018-09-23 21:24:16,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 21:24:16,131 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 222 [2018-09-23 21:24:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:16,132 INFO L225 Difference]: With dead ends: 409 [2018-09-23 21:24:16,132 INFO L226 Difference]: Without dead ends: 226 [2018-09-23 21:24:16,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-09-23 21:24:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-23 21:24:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-09-23 21:24:16,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-09-23 21:24:16,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-09-23 21:24:16,154 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 222 [2018-09-23 21:24:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:16,155 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-09-23 21:24:16,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:24:16,155 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-09-23 21:24:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-23 21:24:16,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:16,156 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1] [2018-09-23 21:24:16,156 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:16,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2022550873, now seen corresponding path program 86 times [2018-09-23 21:24:16,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:16,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:16,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:16,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:16,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:17,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:17,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:17,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:17,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:17,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:17,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:17,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:17,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:24:17,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:24:17,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:24:17,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:24:17,235 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 47 states. [2018-09-23 21:24:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:17,532 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2018-09-23 21:24:17,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:24:17,532 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 223 [2018-09-23 21:24:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:17,533 INFO L225 Difference]: With dead ends: 240 [2018-09-23 21:24:17,533 INFO L226 Difference]: Without dead ends: 234 [2018-09-23 21:24:17,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:24:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-09-23 21:24:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2018-09-23 21:24:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-09-23 21:24:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-09-23 21:24:17,556 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 223 [2018-09-23 21:24:17,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:17,556 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-09-23 21:24:17,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:24:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-09-23 21:24:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-23 21:24:17,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:17,557 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 1, 1, 1, 1, 1] [2018-09-23 21:24:17,558 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:17,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:17,558 INFO L82 PathProgramCache]: Analyzing trace with hash 664947791, now seen corresponding path program 87 times [2018-09-23 21:24:17,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:17,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:17,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:17,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:17,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:21,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:21,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:21,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:21,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 21:24:21,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:21,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:21,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:21,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:21,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 21:24:21,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:24:21,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:24:21,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:24:21,414 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 92 states. [2018-09-23 21:24:24,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:24,684 INFO L93 Difference]: Finished difference Result 418 states and 422 transitions. [2018-09-23 21:24:24,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 21:24:24,684 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 227 [2018-09-23 21:24:24,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:24,685 INFO L225 Difference]: With dead ends: 418 [2018-09-23 21:24:24,685 INFO L226 Difference]: Without dead ends: 231 [2018-09-23 21:24:24,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-09-23 21:24:24,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-23 21:24:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-23 21:24:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-23 21:24:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-23 21:24:24,708 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2018-09-23 21:24:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:24,708 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-23 21:24:24,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:24:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-23 21:24:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-23 21:24:24,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:24,709 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 1, 1, 1, 1, 1] [2018-09-23 21:24:24,709 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:24,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:24,709 INFO L82 PathProgramCache]: Analyzing trace with hash -402751946, now seen corresponding path program 88 times [2018-09-23 21:24:24,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:24,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:24,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:24,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:24,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:25,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:25,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:25,783 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:25,895 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:25,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:25,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:25,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:25,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:24:25,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:24:25,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:24:25,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:24:25,969 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2018-09-23 21:24:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:26,298 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2018-09-23 21:24:26,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:24:26,298 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 228 [2018-09-23 21:24:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:26,300 INFO L225 Difference]: With dead ends: 245 [2018-09-23 21:24:26,300 INFO L226 Difference]: Without dead ends: 239 [2018-09-23 21:24:26,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:24:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-23 21:24:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-09-23 21:24:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-23 21:24:26,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-09-23 21:24:26,328 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2018-09-23 21:24:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:26,328 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-09-23 21:24:26,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:24:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-09-23 21:24:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-23 21:24:26,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:26,329 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 1, 1, 1, 1, 1] [2018-09-23 21:24:26,329 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:26,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash -564828500, now seen corresponding path program 89 times [2018-09-23 21:24:26,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:26,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:26,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:26,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:28,786 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:28,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:28,794 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:28,957 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 21:24:28,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:28,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:29,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:29,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 21:24:29,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:24:29,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:24:29,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:24:29,034 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 94 states. [2018-09-23 21:24:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:32,509 INFO L93 Difference]: Finished difference Result 427 states and 431 transitions. [2018-09-23 21:24:32,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 21:24:32,509 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 232 [2018-09-23 21:24:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:32,510 INFO L225 Difference]: With dead ends: 427 [2018-09-23 21:24:32,510 INFO L226 Difference]: Without dead ends: 236 [2018-09-23 21:24:32,512 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-09-23 21:24:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-09-23 21:24:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-09-23 21:24:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-09-23 21:24:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-09-23 21:24:32,541 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 232 [2018-09-23 21:24:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:32,541 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-09-23 21:24:32,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:24:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-09-23 21:24:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-23 21:24:32,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:32,542 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 1, 1, 1, 1, 1] [2018-09-23 21:24:32,542 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:32,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:32,543 INFO L82 PathProgramCache]: Analyzing trace with hash 522145061, now seen corresponding path program 90 times [2018-09-23 21:24:32,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:32,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:32,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:32,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:32,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:33,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:33,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:33,536 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:33,702 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 21:24:33,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:33,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:33,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:33,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:24:33,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:24:33,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:24:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:24:33,774 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 49 states. [2018-09-23 21:24:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:34,128 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-09-23 21:24:34,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:24:34,128 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 233 [2018-09-23 21:24:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:34,129 INFO L225 Difference]: With dead ends: 250 [2018-09-23 21:24:34,129 INFO L226 Difference]: Without dead ends: 244 [2018-09-23 21:24:34,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:24:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-23 21:24:34,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2018-09-23 21:24:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-09-23 21:24:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2018-09-23 21:24:34,153 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 233 [2018-09-23 21:24:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:34,153 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2018-09-23 21:24:34,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:24:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2018-09-23 21:24:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-09-23 21:24:34,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:34,154 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2018-09-23 21:24:34,154 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:34,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash -377018853, now seen corresponding path program 91 times [2018-09-23 21:24:34,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:34,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:34,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:34,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:34,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:36,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:36,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:36,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:37,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:37,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:37,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 21:24:37,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:24:37,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:24:37,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:24:37,143 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 96 states. [2018-09-23 21:24:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:40,603 INFO L93 Difference]: Finished difference Result 436 states and 440 transitions. [2018-09-23 21:24:40,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:24:40,603 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 237 [2018-09-23 21:24:40,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:40,604 INFO L225 Difference]: With dead ends: 436 [2018-09-23 21:24:40,604 INFO L226 Difference]: Without dead ends: 241 [2018-09-23 21:24:40,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-09-23 21:24:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-23 21:24:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-23 21:24:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-23 21:24:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-09-23 21:24:40,638 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2018-09-23 21:24:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:40,638 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-09-23 21:24:40,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:24:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-09-23 21:24:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-23 21:24:40,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:40,639 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2018-09-23 21:24:40,640 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:40,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash 125264706, now seen corresponding path program 92 times [2018-09-23 21:24:40,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:40,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:40,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:40,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:40,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:41,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:41,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:41,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:41,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:41,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:41,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:41,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:41,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:24:41,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:24:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:24:41,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:24:41,877 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 50 states. [2018-09-23 21:24:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:42,248 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-09-23 21:24:42,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:24:42,248 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 238 [2018-09-23 21:24:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:42,249 INFO L225 Difference]: With dead ends: 255 [2018-09-23 21:24:42,249 INFO L226 Difference]: Without dead ends: 249 [2018-09-23 21:24:42,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:24:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-23 21:24:42,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2018-09-23 21:24:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-23 21:24:42,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-09-23 21:24:42,294 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2018-09-23 21:24:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:42,295 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-09-23 21:24:42,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:24:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-09-23 21:24:42,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-23 21:24:42,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:42,296 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 1, 1, 1, 1, 1] [2018-09-23 21:24:42,296 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:42,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:42,297 INFO L82 PathProgramCache]: Analyzing trace with hash 494724536, now seen corresponding path program 93 times [2018-09-23 21:24:42,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:42,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:42,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:42,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:42,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:45,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:45,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:45,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:45,409 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 21:24:45,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:45,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:45,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:45,484 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 21:24:45,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:24:45,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:24:45,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:24:45,485 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 98 states. [2018-09-23 21:24:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:48,906 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2018-09-23 21:24:48,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 21:24:48,906 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-09-23 21:24:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:48,907 INFO L225 Difference]: With dead ends: 445 [2018-09-23 21:24:48,907 INFO L226 Difference]: Without dead ends: 246 [2018-09-23 21:24:48,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-09-23 21:24:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-09-23 21:24:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-09-23 21:24:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-09-23 21:24:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2018-09-23 21:24:48,930 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 242 [2018-09-23 21:24:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:48,930 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2018-09-23 21:24:48,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:24:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2018-09-23 21:24:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-23 21:24:48,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:48,931 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1] [2018-09-23 21:24:48,931 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:48,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:48,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1883780879, now seen corresponding path program 94 times [2018-09-23 21:24:48,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:48,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:48,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:48,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:48,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:48,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:50,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:50,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:50,322 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:50,441 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:50,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:50,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:50,519 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:50,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:24:50,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:24:50,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:24:50,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:24:50,520 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 51 states. [2018-09-23 21:24:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:50,835 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2018-09-23 21:24:50,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:24:50,836 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 243 [2018-09-23 21:24:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:50,837 INFO L225 Difference]: With dead ends: 260 [2018-09-23 21:24:50,837 INFO L226 Difference]: Without dead ends: 254 [2018-09-23 21:24:50,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:24:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-09-23 21:24:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2018-09-23 21:24:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-09-23 21:24:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-09-23 21:24:50,861 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 243 [2018-09-23 21:24:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:50,861 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-09-23 21:24:50,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:24:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-09-23 21:24:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-09-23 21:24:50,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:50,862 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 1, 1, 1, 1, 1] [2018-09-23 21:24:50,862 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:50,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:50,862 INFO L82 PathProgramCache]: Analyzing trace with hash 514120679, now seen corresponding path program 95 times [2018-09-23 21:24:50,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:50,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:50,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:50,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:50,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:53,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:53,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:53,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:53,822 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:24:53,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:53,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:53,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:53,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 21:24:53,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:24:53,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:24:53,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:24:53,901 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 100 states. [2018-09-23 21:24:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:57,859 INFO L93 Difference]: Finished difference Result 454 states and 458 transitions. [2018-09-23 21:24:57,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 21:24:57,859 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 247 [2018-09-23 21:24:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:57,860 INFO L225 Difference]: With dead ends: 454 [2018-09-23 21:24:57,860 INFO L226 Difference]: Without dead ends: 251 [2018-09-23 21:24:57,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-09-23 21:24:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-23 21:24:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-23 21:24:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-23 21:24:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2018-09-23 21:24:57,892 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2018-09-23 21:24:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:57,892 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2018-09-23 21:24:57,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:24:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2018-09-23 21:24:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-23 21:24:57,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:57,893 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 1, 1, 1, 1, 1] [2018-09-23 21:24:57,893 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:57,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1107028914, now seen corresponding path program 96 times [2018-09-23 21:24:57,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:57,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:57,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:57,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:57,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:58,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:58,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:58,968 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:59,150 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 21:24:59,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:59,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:59,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:59,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:24:59,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:24:59,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:24:59,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:24:59,249 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 52 states. [2018-09-23 21:24:59,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:59,569 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2018-09-23 21:24:59,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:24:59,569 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2018-09-23 21:24:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:59,570 INFO L225 Difference]: With dead ends: 265 [2018-09-23 21:24:59,570 INFO L226 Difference]: Without dead ends: 259 [2018-09-23 21:24:59,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:24:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-23 21:24:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-09-23 21:24:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-23 21:24:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-09-23 21:24:59,597 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 248 [2018-09-23 21:24:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:59,597 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-09-23 21:24:59,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:24:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-09-23 21:24:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-23 21:24:59,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:59,598 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 1, 1, 1, 1, 1] [2018-09-23 21:24:59,598 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:59,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:59,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1827811524, now seen corresponding path program 97 times [2018-09-23 21:24:59,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:59,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:59,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:59,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:59,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:02,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:02,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:02,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:02,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:03,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:03,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 21:25:03,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:25:03,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:25:03,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:25:03,050 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 102 states. [2018-09-23 21:25:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:06,359 INFO L93 Difference]: Finished difference Result 463 states and 467 transitions. [2018-09-23 21:25:06,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 21:25:06,359 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 252 [2018-09-23 21:25:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:06,360 INFO L225 Difference]: With dead ends: 463 [2018-09-23 21:25:06,360 INFO L226 Difference]: Without dead ends: 256 [2018-09-23 21:25:06,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-09-23 21:25:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-09-23 21:25:06,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-09-23 21:25:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-23 21:25:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-09-23 21:25:06,389 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 252 [2018-09-23 21:25:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:06,389 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-09-23 21:25:06,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:25:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-09-23 21:25:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-23 21:25:06,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:06,391 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 1, 1, 1, 1, 1] [2018-09-23 21:25:06,391 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:06,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:06,391 INFO L82 PathProgramCache]: Analyzing trace with hash -803659587, now seen corresponding path program 98 times [2018-09-23 21:25:06,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:06,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:06,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:06,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:06,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:06,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:07,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:07,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:07,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:07,642 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:07,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:07,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:07,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:07,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:25:07,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:25:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:25:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:25:07,719 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 53 states. [2018-09-23 21:25:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:08,042 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2018-09-23 21:25:08,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:25:08,042 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 253 [2018-09-23 21:25:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:08,043 INFO L225 Difference]: With dead ends: 270 [2018-09-23 21:25:08,043 INFO L226 Difference]: Without dead ends: 264 [2018-09-23 21:25:08,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:25:08,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-09-23 21:25:08,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2018-09-23 21:25:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-09-23 21:25:08,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2018-09-23 21:25:08,078 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 253 [2018-09-23 21:25:08,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:08,078 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2018-09-23 21:25:08,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:25:08,078 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2018-09-23 21:25:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-09-23 21:25:08,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:08,079 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 1, 1, 1, 1, 1] [2018-09-23 21:25:08,080 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:08,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash 465399219, now seen corresponding path program 99 times [2018-09-23 21:25:08,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:08,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:08,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:08,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:08,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:11,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:11,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:11,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:11,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-23 21:25:11,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:11,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:11,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:11,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-23 21:25:11,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 21:25:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 21:25:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:25:11,837 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 104 states. [2018-09-23 21:25:15,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:15,764 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2018-09-23 21:25:15,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 21:25:15,764 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 257 [2018-09-23 21:25:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:15,765 INFO L225 Difference]: With dead ends: 472 [2018-09-23 21:25:15,765 INFO L226 Difference]: Without dead ends: 261 [2018-09-23 21:25:15,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-09-23 21:25:15,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-23 21:25:15,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-23 21:25:15,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-23 21:25:15,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2018-09-23 21:25:15,793 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2018-09-23 21:25:15,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:15,793 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2018-09-23 21:25:15,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 21:25:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2018-09-23 21:25:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-23 21:25:15,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:15,794 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1] [2018-09-23 21:25:15,794 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:15,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:15,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1064997210, now seen corresponding path program 100 times [2018-09-23 21:25:15,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:15,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:15,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:15,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:15,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:16,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:16,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:17,005 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:17,132 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:17,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:17,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:17,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:17,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:25:17,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:25:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:25:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:25:17,241 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand 54 states. [2018-09-23 21:25:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:17,570 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2018-09-23 21:25:17,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:25:17,571 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2018-09-23 21:25:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:17,571 INFO L225 Difference]: With dead ends: 275 [2018-09-23 21:25:17,571 INFO L226 Difference]: Without dead ends: 269 [2018-09-23 21:25:17,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:25:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-23 21:25:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2018-09-23 21:25:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-23 21:25:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-09-23 21:25:17,600 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 258 [2018-09-23 21:25:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:17,601 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-09-23 21:25:17,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:25:17,601 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-09-23 21:25:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-23 21:25:17,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:17,602 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 1, 1, 1, 1, 1] [2018-09-23 21:25:17,602 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:17,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:17,602 INFO L82 PathProgramCache]: Analyzing trace with hash 629884880, now seen corresponding path program 101 times [2018-09-23 21:25:17,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:17,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:17,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:17,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:17,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:21,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:21,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:21,037 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:21,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-23 21:25:21,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:21,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:21,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:21,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-23 21:25:21,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 21:25:21,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 21:25:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:25:21,476 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 106 states. [2018-09-23 21:25:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:25,686 INFO L93 Difference]: Finished difference Result 481 states and 485 transitions. [2018-09-23 21:25:25,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 21:25:25,686 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 262 [2018-09-23 21:25:25,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:25,687 INFO L225 Difference]: With dead ends: 481 [2018-09-23 21:25:25,687 INFO L226 Difference]: Without dead ends: 266 [2018-09-23 21:25:25,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5721, Invalid=19085, Unknown=0, NotChecked=0, Total=24806 [2018-09-23 21:25:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-09-23 21:25:25,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-09-23 21:25:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-09-23 21:25:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2018-09-23 21:25:25,724 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 262 [2018-09-23 21:25:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:25,724 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2018-09-23 21:25:25,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 21:25:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2018-09-23 21:25:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-09-23 21:25:25,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:25,726 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 1, 1, 1, 1, 1] [2018-09-23 21:25:25,726 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:25,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:25,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1501211511, now seen corresponding path program 102 times [2018-09-23 21:25:25,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:25,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:25,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:25,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:25,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:26,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:26,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:26,980 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:27,177 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-23 21:25:27,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:27,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:27,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:27,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:25:27,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:25:27,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:25:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:25:27,270 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 55 states. [2018-09-23 21:25:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:27,605 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2018-09-23 21:25:27,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:25:27,605 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 263 [2018-09-23 21:25:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:27,606 INFO L225 Difference]: With dead ends: 280 [2018-09-23 21:25:27,606 INFO L226 Difference]: Without dead ends: 274 [2018-09-23 21:25:27,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:25:27,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-09-23 21:25:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-09-23 21:25:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-23 21:25:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2018-09-23 21:25:27,637 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 263 [2018-09-23 21:25:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:27,637 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2018-09-23 21:25:27,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:25:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2018-09-23 21:25:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-23 21:25:27,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:27,638 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 1, 1, 1, 1, 1] [2018-09-23 21:25:27,638 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:27,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:27,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1240278145, now seen corresponding path program 103 times [2018-09-23 21:25:27,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:27,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:27,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:27,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:27,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:31,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:31,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:31,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:31,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:31,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:31,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-23 21:25:31,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 21:25:31,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 21:25:31,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:25:31,382 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 108 states. [2018-09-23 21:25:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:35,701 INFO L93 Difference]: Finished difference Result 490 states and 494 transitions. [2018-09-23 21:25:35,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 21:25:35,702 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 267 [2018-09-23 21:25:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:35,702 INFO L225 Difference]: With dead ends: 490 [2018-09-23 21:25:35,702 INFO L226 Difference]: Without dead ends: 271 [2018-09-23 21:25:35,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5937, Invalid=19823, Unknown=0, NotChecked=0, Total=25760 [2018-09-23 21:25:35,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-23 21:25:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-23 21:25:35,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-23 21:25:35,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2018-09-23 21:25:35,732 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 267 [2018-09-23 21:25:35,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:35,732 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2018-09-23 21:25:35,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 21:25:35,732 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2018-09-23 21:25:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-23 21:25:35,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:35,733 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 52, 52, 1, 1, 1, 1, 1] [2018-09-23 21:25:35,733 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:35,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:35,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1999690342, now seen corresponding path program 104 times [2018-09-23 21:25:35,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:35,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:35,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:35,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:35,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 21:25:35,796 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,796 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,796 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,797 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,797 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,797 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,797 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,797 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,798 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,798 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,798 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,798 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,799 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,799 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,799 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,799 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,799 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,800 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,800 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,800 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,800 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,800 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,801 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,801 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,802 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,802 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,802 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,802 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,802 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,803 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,803 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,803 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,803 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,803 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,804 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,804 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,804 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,804 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,805 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,805 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,805 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,805 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,805 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,806 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,806 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,806 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,806 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,806 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,807 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,807 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,807 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,807 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,807 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,808 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,808 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,808 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,808 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,808 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,809 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,809 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,809 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,809 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,810 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,810 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,810 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,810 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,810 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,811 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,811 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,811 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,811 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,812 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,812 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,812 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,812 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,812 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,813 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,813 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,813 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,813 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,813 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,814 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,814 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,814 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,814 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,815 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,815 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,815 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,815 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,815 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,816 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,816 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,816 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,816 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,816 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,817 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,817 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,817 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,817 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,817 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,818 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,818 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,818 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,818 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,818 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,819 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,819 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,819 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,819 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,819 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,820 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,820 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,820 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,820 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,820 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,821 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,821 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,821 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,821 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,822 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,822 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,822 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,822 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,822 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,823 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,823 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,823 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,823 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,823 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,824 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,824 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,824 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,824 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,825 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,825 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,825 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,825 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,825 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,826 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,826 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,826 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,826 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,827 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,827 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,827 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,827 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,827 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,828 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,828 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,828 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,828 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,829 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,829 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,829 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,829 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,829 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,830 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,830 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,830 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,830 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,831 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,831 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,831 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,831 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,831 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,831 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,832 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,832 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,832 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,832 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,832 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,833 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,833 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,833 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,833 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,834 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,834 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,834 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,834 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,834 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,835 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,835 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,835 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,835 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,835 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,836 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,836 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,836 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,836 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,836 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,837 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,837 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,837 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,837 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,837 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,838 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,838 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,838 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,838 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,839 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,839 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,839 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,839 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,839 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,840 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,840 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,840 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,840 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,840 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,841 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,841 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,841 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,841 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,841 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,841 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,842 WARN L250 erpolLogProxyWrapper]: Unable to check validity of interpolant: cancelled [2018-09-23 21:25:35,851 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:25:35,856 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:25:35,856 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:25:35 BoogieIcfgContainer [2018-09-23 21:25:35,856 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:25:35,857 INFO L168 Benchmark]: Toolchain (without parser) took 236078.01 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 335.0 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 61.5 MB). Peak memory consumption was 396.5 MB. Max. memory is 7.1 GB. [2018-09-23 21:25:35,858 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:25:35,858 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:25:35,858 INFO L168 Benchmark]: Boogie Preprocessor took 25.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:25:35,858 INFO L168 Benchmark]: RCFGBuilder took 353.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:25:35,859 INFO L168 Benchmark]: TraceAbstraction took 235651.60 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 335.0 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 40.4 MB). Peak memory consumption was 375.4 MB. Max. memory is 7.1 GB. [2018-09-23 21:25:35,861 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.53 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 353.05 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235651.60 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 335.0 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 40.4 MB). Peak memory consumption was 375.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was analyzing trace of length 269 with TraceHistMax 53, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 267 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 235.5s OverallTime, 108 OverallIterations, 53 TraceHistogramMax, 111.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3302 SDtfs, 7619 SDslu, 74152 SDs, 0 SdLazy, 79668 SolverSat, 1660 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21351 GetRequests, 15624 SyntacticMatches, 0 SemanticMatches, 5727 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73034 ImplicationChecksByTransitivity, 143.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=271occurred in iteration=107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 107 MinimizatonAttempts, 214 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 9.1s SatisfiabilityAnalysisTime, 105.9s InterpolantComputationTime, 28614 NumberOfCodeBlocks, 28614 NumberOfCodeBlocksAsserted, 1604 NumberOfCheckSat, 28404 ConstructedInterpolants, 0 QuantifiedInterpolants, 14943864 SizeOfPredicates, 207 NumberOfNonLiveVariables, 45579 ConjunctsInSsa, 5769 ConjunctsInUnsatCore, 210 InterpolantComputations, 4 PerfectInterpolantSequences, 253344/485056 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-25-35-869.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-25-35-869.csv Completed graceful shutdown