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/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:39:06,467 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:39:06,469 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:39:06,487 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:39:06,487 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:39:06,488 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:39:06,490 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:39:06,492 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:39:06,495 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:39:06,502 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:39:06,503 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:39:06,543 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 [2018-10-03 08:39:06,570 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:39:06,571 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:39:06,571 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:39:06,572 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:39:06,572 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:39:06,572 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:39:06,573 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:39:06,573 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:39:06,573 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:39:06,573 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:39:06,573 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:39:06,573 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:39:06,574 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:39:06,574 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:39:06,574 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:39:06,574 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:39:06,574 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:39:06,575 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:39:06,575 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:39:06,575 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:39:06,575 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:39:06,575 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:39:06,575 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:39:06,576 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:39:06,576 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:39:06,576 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:39:06,576 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:39:06,576 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:39:06,577 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:39:06,577 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:39:06,636 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:39:06,653 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:39:06,658 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:39:06,660 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:39:06,660 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:39:06,661 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-03 08:39:06,662 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-10-03 08:39:06,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:39:06,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:39:06,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:39:06,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:39:06,731 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:39:06,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:39:06,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:39:06,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:39:06,774 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:39:06,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,792 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:39:06,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:39:06,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:39:06,804 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:39:06,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (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 [2018-10-03 08:39:06,881 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-03 08:39:06,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:39:06,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:39:07,111 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:39:07,112 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:39:07 BoogieIcfgContainer [2018-10-03 08:39:07,112 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:39:07,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:39:07,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:39:07,116 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:39:07,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/2) ... [2018-10-03 08:39:07,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11042507 and model type fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:39:07, skipping insertion in model container [2018-10-03 08:39:07,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:39:07" (2/2) ... [2018-10-03 08:39:07,120 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-03 08:39:07,130 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:39:07,138 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:39:07,188 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:39:07,189 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:39:07,189 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:39:07,189 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:39:07,190 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:39:07,190 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:39:07,190 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:39:07,190 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:39:07,190 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:39:07,206 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-10-03 08:39:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:39:07,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:07,213 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:07,214 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:07,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1807861163, now seen corresponding path program 1 times [2018-10-03 08:39:07,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:07,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:07,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:07,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:07,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:07,374 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:39:07,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:39:07,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:39:07,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:39:07,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:39:07,406 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-10-03 08:39:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:07,440 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-10-03 08:39:07,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:39:07,442 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-03 08:39:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:07,453 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:39:07,454 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:39:07,460 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 [2018-10-03 08:39:07,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:39:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:39:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:39:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-10-03 08:39:07,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-10-03 08:39:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:07,510 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-10-03 08:39:07,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:39:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-10-03 08:39:07,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:39:07,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:07,511 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:07,512 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:07,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 89245487, now seen corresponding path program 1 times [2018-10-03 08:39:07,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:07,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:07,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:07,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:07,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:07,643 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 [2018-10-03 08:39:07,659 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:07,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:07,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:07,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:39:07,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:39:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:39:07,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:39:07,756 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-10-03 08:39:07,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:07,881 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-10-03 08:39:07,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:39:07,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-03 08:39:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:07,883 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:39:07,883 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:39:07,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:39:07,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:39:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 08:39:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:39:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-03 08:39:07,892 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-03 08:39:07,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:07,892 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-03 08:39:07,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:39:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-03 08:39:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:39:07,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:07,894 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:07,894 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:07,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:07,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2061989811, now seen corresponding path program 2 times [2018-10-03 08:39:07,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:07,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:07,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:07,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:08,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:39:08,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-03 08:39:08,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:39:08,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:39:08,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:08,118 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-10-03 08:39:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:08,239 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-10-03 08:39:08,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:39:08,240 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-03 08:39:08,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:08,240 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:39:08,241 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:39:08,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:39:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2018-10-03 08:39:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:39:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-10-03 08:39:08,248 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2018-10-03 08:39:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:08,249 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-10-03 08:39:08,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:39:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-10-03 08:39:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:39:08,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:08,250 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:08,250 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:08,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:08,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2062049393, now seen corresponding path program 1 times [2018-10-03 08:39:08,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:08,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:08,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:08,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:08,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-03 08:39:08,302 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:39:08,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-03 08:39:08,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:39:08,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:39:08,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:39:08,304 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2018-10-03 08:39:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:08,442 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2018-10-03 08:39:08,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:39:08,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-10-03 08:39:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:08,444 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:39:08,445 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:39:08,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:08,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:39:08,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-10-03 08:39:08,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:39:08,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-03 08:39:08,452 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2018-10-03 08:39:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:08,453 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-03 08:39:08,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:39:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-03 08:39:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:39:08,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:08,454 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2018-10-03 08:39:08,454 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:08,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1980186676, now seen corresponding path program 1 times [2018-10-03 08:39:08,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:08,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:08,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:08,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:08,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:08,546 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 [2018-10-03 08:39:08,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:08,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:08,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:08,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:08,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:39:08,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:39:08,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:39:08,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:08,638 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2018-10-03 08:39:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:08,722 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-10-03 08:39:08,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:39:08,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-03 08:39:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:08,724 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:39:08,724 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:39:08,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:39:08,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:39:08,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:39:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-10-03 08:39:08,739 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-10-03 08:39:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:08,740 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-10-03 08:39:08,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:39:08,741 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-10-03 08:39:08,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:39:08,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:08,742 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:08,743 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:08,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:08,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1317950664, now seen corresponding path program 2 times [2018-10-03 08:39:08,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:08,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:08,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:08,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:08,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:08,944 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 [2018-10-03 08:39:08,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:09,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:09,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:09,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:09,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:09,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:39:09,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:39:09,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:39:09,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:39:09,041 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-10-03 08:39:09,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:09,135 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-10-03 08:39:09,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:39:09,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-10-03 08:39:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:09,137 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:39:09,137 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:39:09,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:39:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:39:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:39:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:39:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-03 08:39:09,143 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2018-10-03 08:39:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:09,144 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-03 08:39:09,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:39:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-03 08:39:09,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:39:09,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:09,145 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:09,145 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:09,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:09,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1142069956, now seen corresponding path program 3 times [2018-10-03 08:39:09,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:09,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:09,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:09,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:09,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:09,270 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 [2018-10-03 08:39:09,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:09,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-03 08:39:09,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:09,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:09,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:09,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:39:09,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:39:09,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:39:09,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:39:09,343 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-10-03 08:39:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:09,382 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-10-03 08:39:09,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:39:09,393 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-10-03 08:39:09,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:09,393 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:39:09,394 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:39:09,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:39:09,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:39:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:39:09,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:39:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-10-03 08:39:09,400 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-10-03 08:39:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:09,401 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-10-03 08:39:09,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:39:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-10-03 08:39:09,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:39:09,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:09,402 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:09,402 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:09,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash -375565888, now seen corresponding path program 4 times [2018-10-03 08:39:09,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:09,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:09,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:09,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:09,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:09,534 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 [2018-10-03 08:39:09,548 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:09,579 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:09,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:09,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:09,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:09,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:39:09,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:39:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:39:09,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:39:09,617 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2018-10-03 08:39:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:09,769 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-10-03 08:39:09,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:39:09,770 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-10-03 08:39:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:09,771 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:39:09,771 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:39:09,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:39:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:39:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:39:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:39:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-10-03 08:39:09,778 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-10-03 08:39:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:09,778 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-10-03 08:39:09,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:39:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-10-03 08:39:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:39:09,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:09,779 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:09,780 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:09,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:09,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1465268668, now seen corresponding path program 5 times [2018-10-03 08:39:09,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:09,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:09,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:09,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:10,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:10,123 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 [2018-10-03 08:39:10,132 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:10,193 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:39:10,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:10,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:10,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:10,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:39:10,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:39:10,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:39:10,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:39:10,227 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-10-03 08:39:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:10,296 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-10-03 08:39:10,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:39:10,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-10-03 08:39:10,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:10,299 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:39:10,299 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:39:10,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:39:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:39:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:39:10,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:39:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-03 08:39:10,306 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2018-10-03 08:39:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:10,306 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-03 08:39:10,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:39:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-03 08:39:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:39:10,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:10,308 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:10,308 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:10,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash 980751032, now seen corresponding path program 6 times [2018-10-03 08:39:10,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:10,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:10,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:10,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:10,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:10,589 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 [2018-10-03 08:39:10,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:10,724 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:39:10,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:10,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:10,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:10,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:39:10,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:39:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:39:10,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:39:10,772 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-10-03 08:39:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:10,943 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-10-03 08:39:10,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:39:10,945 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-10-03 08:39:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:10,946 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:39:10,946 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:39:10,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:39:10,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:39:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:39:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:39:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-10-03 08:39:10,954 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2018-10-03 08:39:10,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:10,954 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-10-03 08:39:10,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:39:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-10-03 08:39:10,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:39:10,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:10,956 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:10,956 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:10,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:10,956 INFO L82 PathProgramCache]: Analyzing trace with hash -784229196, now seen corresponding path program 7 times [2018-10-03 08:39:10,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:10,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:10,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:10,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:11,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:11,169 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 [2018-10-03 08:39:11,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:11,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:11,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:11,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:39:11,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:39:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:39:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:39:11,252 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2018-10-03 08:39:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:11,308 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-03 08:39:11,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:39:11,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-10-03 08:39:11,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:11,313 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:39:11,313 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:39:11,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:39:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:39:11,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:39:11,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:39:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-03 08:39:11,320 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2018-10-03 08:39:11,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:11,320 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-03 08:39:11,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:39:11,320 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-03 08:39:11,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:39:11,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:11,322 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:11,322 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:11,322 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash -418146384, now seen corresponding path program 8 times [2018-10-03 08:39:11,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:11,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:11,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:11,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:11,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:11,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:11,649 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 [2018-10-03 08:39:11,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:11,699 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:11,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:11,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:11,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:11,734 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:39:11,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:39:11,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:39:11,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:39:11,735 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2018-10-03 08:39:11,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:11,997 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-10-03 08:39:11,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:39:11,998 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-10-03 08:39:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:11,998 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:39:11,999 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:39:11,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:39:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:39:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:39:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:39:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-10-03 08:39:12,011 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2018-10-03 08:39:12,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:12,012 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-10-03 08:39:12,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:39:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-10-03 08:39:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:39:12,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:12,013 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:12,013 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:12,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash -799882324, now seen corresponding path program 9 times [2018-10-03 08:39:12,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:12,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:12,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:12,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:12,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:12,232 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 [2018-10-03 08:39:12,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:12,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-03 08:39:12,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:12,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:12,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:12,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:39:12,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:39:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:39:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:39:12,325 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2018-10-03 08:39:12,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:12,442 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2018-10-03 08:39:12,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:39:12,445 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-10-03 08:39:12,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:12,446 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:39:12,446 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:39:12,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:39:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:39:12,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:39:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:39:12,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-10-03 08:39:12,452 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2018-10-03 08:39:12,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:12,453 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-10-03 08:39:12,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:39:12,453 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-10-03 08:39:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:39:12,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:12,454 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:12,454 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:12,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:12,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1719066792, now seen corresponding path program 10 times [2018-10-03 08:39:12,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:12,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:12,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:12,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:12,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:12,641 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 [2018-10-03 08:39:12,649 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:12,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:12,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:12,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:12,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:12,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:39:12,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:39:12,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:39:12,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:39:12,737 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2018-10-03 08:39:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:12,819 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-10-03 08:39:12,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:39:12,820 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-10-03 08:39:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:12,820 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:39:12,820 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:39:12,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:39:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:39:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:39:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:39:12,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-03 08:39:12,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-10-03 08:39:12,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:12,828 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-03 08:39:12,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:39:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-03 08:39:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:39:12,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:12,830 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:12,830 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:12,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:12,830 INFO L82 PathProgramCache]: Analyzing trace with hash 67612324, now seen corresponding path program 11 times [2018-10-03 08:39:12,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:12,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:12,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:12,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:13,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:13,040 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 [2018-10-03 08:39:13,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:13,094 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:39:13,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:13,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:13,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:13,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:39:13,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:39:13,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:39:13,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:39:13,140 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-10-03 08:39:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:13,362 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-10-03 08:39:13,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:39:13,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-03 08:39:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:13,365 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:39:13,366 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:39:13,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:39:13,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:39:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:39:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:39:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-10-03 08:39:13,372 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2018-10-03 08:39:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:13,373 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-10-03 08:39:13,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:39:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-10-03 08:39:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:39:13,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:13,374 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:13,374 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:13,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:13,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2137199200, now seen corresponding path program 12 times [2018-10-03 08:39:13,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:13,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:13,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:13,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:13,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:13,691 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 [2018-10-03 08:39:13,699 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:13,809 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-03 08:39:13,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:13,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:13,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:13,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:39:13,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:39:13,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:39:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:39:13,865 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2018-10-03 08:39:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:13,976 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-10-03 08:39:13,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:39:13,976 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-10-03 08:39:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:13,977 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:39:13,977 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:39:13,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:39:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:39:13,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:39:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:39:13,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-03 08:39:13,982 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2018-10-03 08:39:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:13,982 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-03 08:39:13,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:39:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-03 08:39:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:39:13,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:13,983 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:13,984 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:13,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:13,984 INFO L82 PathProgramCache]: Analyzing trace with hash 752770460, now seen corresponding path program 13 times [2018-10-03 08:39:13,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:13,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:13,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:13,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:14,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:14,471 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 [2018-10-03 08:39:14,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:14,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:14,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:14,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:39:14,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:39:14,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:39:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:39:14,578 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2018-10-03 08:39:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:14,789 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2018-10-03 08:39:14,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:39:14,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-10-03 08:39:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:14,792 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:39:14,792 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:39:14,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:39:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:39:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:39:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:39:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-10-03 08:39:14,799 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-10-03 08:39:14,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:14,799 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-10-03 08:39:14,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:39:14,799 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-10-03 08:39:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:39:14,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:14,800 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:14,800 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:14,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -830226792, now seen corresponding path program 14 times [2018-10-03 08:39:14,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:14,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:14,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:14,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:15,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:15,347 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 [2018-10-03 08:39:15,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:15,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:15,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:15,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:15,411 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:15,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:15,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:39:15,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:39:15,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:39:15,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:39:15,443 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2018-10-03 08:39:15,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:15,553 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-10-03 08:39:15,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:39:15,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-10-03 08:39:15,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:15,558 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:39:15,558 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:39:15,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:39:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:39:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:39:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:39:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-10-03 08:39:15,564 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2018-10-03 08:39:15,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:15,565 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-10-03 08:39:15,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:39:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-10-03 08:39:15,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:39:15,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:15,566 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:15,566 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:15,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:15,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1672163180, now seen corresponding path program 15 times [2018-10-03 08:39:15,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:15,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:15,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:15,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:15,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:15,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:15,912 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 [2018-10-03 08:39:15,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:15,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-10-03 08:39:15,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:16,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:16,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:16,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:39:16,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:39:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:39:16,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:39:16,046 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2018-10-03 08:39:16,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:16,133 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-10-03 08:39:16,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:39:16,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-10-03 08:39:16,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:16,134 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:39:16,134 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:39:16,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:39:16,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:39:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:39:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:39:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-10-03 08:39:16,141 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2018-10-03 08:39:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:16,141 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-10-03 08:39:16,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:39:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-10-03 08:39:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:39:16,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:16,142 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:16,143 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:16,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash 975786896, now seen corresponding path program 16 times [2018-10-03 08:39:16,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:16,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:16,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:16,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:16,447 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:16,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:16,447 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 [2018-10-03 08:39:16,458 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:16,493 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:16,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:16,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:16,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:16,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:39:16,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:39:16,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:39:16,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:39:16,539 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2018-10-03 08:39:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:16,602 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-10-03 08:39:16,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:39:16,602 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2018-10-03 08:39:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:16,603 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:39:16,603 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:39:16,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:39:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:39:16,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:39:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:39:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-10-03 08:39:16,609 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2018-10-03 08:39:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:16,609 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-10-03 08:39:16,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:39:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-10-03 08:39:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:39:16,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:16,610 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:16,611 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:16,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:16,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1259796596, now seen corresponding path program 17 times [2018-10-03 08:39:16,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:16,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:16,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:16,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:17,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:17,378 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 [2018-10-03 08:39:17,387 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:17,441 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:39:17,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:17,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:17,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:17,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:39:17,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:39:17,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:39:17,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:39:17,491 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2018-10-03 08:39:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:17,720 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-10-03 08:39:17,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:39:17,721 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-10-03 08:39:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:17,722 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:39:17,722 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:39:17,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:39:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:39:17,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:39:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:39:17,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-03 08:39:17,728 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2018-10-03 08:39:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:17,729 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-03 08:39:17,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:39:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-03 08:39:17,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:39:17,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:17,730 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:17,730 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:17,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2123082888, now seen corresponding path program 18 times [2018-10-03 08:39:17,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:17,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:17,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:17,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:18,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:18,045 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 [2018-10-03 08:39:18,053 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:18,103 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-03 08:39:18,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:18,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:18,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:18,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:39:18,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:39:18,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:39:18,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:39:18,151 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-10-03 08:39:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:18,295 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2018-10-03 08:39:18,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:39:18,296 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2018-10-03 08:39:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:18,297 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:39:18,297 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:39:18,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:39:18,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:39:18,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:39:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:39:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-10-03 08:39:18,307 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2018-10-03 08:39:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:18,307 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-10-03 08:39:18,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:39:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-10-03 08:39:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:39:18,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:18,308 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:18,308 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:18,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:18,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1780023940, now seen corresponding path program 19 times [2018-10-03 08:39:18,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:18,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:18,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:18,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:18,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:18,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:18,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:39:18,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:18,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:18,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:18,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:39:18,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:39:18,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:39:18,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:39:18,958 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2018-10-03 08:39:19,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:19,044 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2018-10-03 08:39:19,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:39:19,045 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2018-10-03 08:39:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:19,045 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:39:19,045 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:39:19,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:39:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:39:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:39:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:39:19,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-03 08:39:19,051 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-10-03 08:39:19,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:19,051 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-03 08:39:19,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:39:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-03 08:39:19,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:39:19,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:19,052 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:19,053 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:19,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:19,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1482110592, now seen corresponding path program 20 times [2018-10-03 08:39:19,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:19,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:19,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:19,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:19,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:19,566 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 [2018-10-03 08:39:19,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:19,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:19,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:19,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:19,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:19,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:39:19,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:39:19,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:39:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:39:19,673 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2018-10-03 08:39:19,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:19,732 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-03 08:39:19,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:39:19,733 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2018-10-03 08:39:19,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:19,733 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:39:19,733 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:39:19,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:39:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:39:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:39:19,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:39:19,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-03 08:39:19,738 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2018-10-03 08:39:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:19,738 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-03 08:39:19,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:39:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-03 08:39:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:39:19,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:19,739 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:19,739 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:19,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1067269764, now seen corresponding path program 21 times [2018-10-03 08:39:19,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:19,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:19,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:19,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:20,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:20,253 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 [2018-10-03 08:39:20,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:20,310 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-10-03 08:39:20,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:20,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:20,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:20,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:39:20,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:39:20,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:39:20,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:39:20,352 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2018-10-03 08:39:20,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:20,410 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2018-10-03 08:39:20,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:39:20,412 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2018-10-03 08:39:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:20,413 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:39:20,413 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:39:20,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:39:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:39:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:39:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:39:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-03 08:39:20,416 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2018-10-03 08:39:20,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:20,417 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-03 08:39:20,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:39:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-03 08:39:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:39:20,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:20,418 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:20,418 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:20,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:20,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192584, now seen corresponding path program 22 times [2018-10-03 08:39:20,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:20,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:20,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:20,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:20,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:21,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:21,378 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 [2018-10-03 08:39:21,390 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:21,445 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:21,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:21,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:21,460 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:21,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:21,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:39:21,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:39:21,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:39:21,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:39:21,487 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2018-10-03 08:39:21,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:21,559 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-10-03 08:39:21,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:39:21,560 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-10-03 08:39:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:21,560 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:39:21,561 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:39:21,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:39:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:39:21,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:39:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:39:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-03 08:39:21,566 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-10-03 08:39:21,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:21,566 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-03 08:39:21,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:39:21,566 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-03 08:39:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:39:21,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:21,567 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:21,567 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:21,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:21,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1296319604, now seen corresponding path program 23 times [2018-10-03 08:39:21,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:21,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:21,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:21,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:22,219 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:22,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:22,219 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 [2018-10-03 08:39:22,227 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:22,286 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:39:22,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:22,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:22,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:22,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:39:22,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:39:22,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:39:22,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:39:22,332 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2018-10-03 08:39:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:22,628 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-10-03 08:39:22,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:39:22,628 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2018-10-03 08:39:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:22,629 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:39:22,629 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:39:22,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:39:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:39:22,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:39:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:39:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-10-03 08:39:22,634 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2018-10-03 08:39:22,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:22,634 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-10-03 08:39:22,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:39:22,634 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-10-03 08:39:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:39:22,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:22,635 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:22,635 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:22,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1829457776, now seen corresponding path program 24 times [2018-10-03 08:39:22,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:22,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:22,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:22,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:22,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:23,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:23,148 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 [2018-10-03 08:39:23,157 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:23,217 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-03 08:39:23,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:23,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:23,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:23,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:39:23,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:39:23,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:39:23,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:39:23,254 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2018-10-03 08:39:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:23,352 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2018-10-03 08:39:23,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:39:23,353 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2018-10-03 08:39:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:23,354 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:39:23,354 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:39:23,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:39:23,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:39:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:39:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:39:23,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-10-03 08:39:23,359 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2018-10-03 08:39:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:23,359 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-10-03 08:39:23,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:39:23,360 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-10-03 08:39:23,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:39:23,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:23,360 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:23,360 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:23,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:23,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1220834452, now seen corresponding path program 25 times [2018-10-03 08:39:23,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:23,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:23,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:23,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:23,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:23,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:23,933 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 [2018-10-03 08:39:23,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:23,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:24,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:24,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:39:24,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:39:24,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:39:24,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:39:24,048 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2018-10-03 08:39:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:24,219 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-10-03 08:39:24,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:39:24,220 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2018-10-03 08:39:24,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:24,221 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:39:24,221 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:39:24,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:39:24,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:39:24,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:39:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:39:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-10-03 08:39:24,227 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2018-10-03 08:39:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:24,227 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-10-03 08:39:24,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:39:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-10-03 08:39:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:39:24,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:24,228 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:24,228 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:24,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash 910997608, now seen corresponding path program 26 times [2018-10-03 08:39:24,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:24,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:24,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:24,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:24,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:25,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:25,059 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 [2018-10-03 08:39:25,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:25,120 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:25,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:25,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:25,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:25,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:39:25,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:39:25,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:39:25,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:39:25,176 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2018-10-03 08:39:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:25,234 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2018-10-03 08:39:25,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:39:25,234 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2018-10-03 08:39:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:25,235 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:39:25,235 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:39:25,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:39:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:39:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:39:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:39:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-03 08:39:25,240 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2018-10-03 08:39:25,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:25,241 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-03 08:39:25,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:39:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-03 08:39:25,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:39:25,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:25,241 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:25,242 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:25,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:25,242 INFO L82 PathProgramCache]: Analyzing trace with hash 902207076, now seen corresponding path program 27 times [2018-10-03 08:39:25,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:25,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:25,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:25,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:25,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:25,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:25,638 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 [2018-10-03 08:39:25,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:25,708 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-10-03 08:39:25,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:25,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:25,741 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:25,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:39:25,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:39:25,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:39:25,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:39:25,742 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2018-10-03 08:39:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:25,814 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-10-03 08:39:25,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:39:25,815 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-10-03 08:39:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:25,816 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:39:25,816 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:39:25,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:39:25,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:39:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:39:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:39:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-10-03 08:39:25,822 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2018-10-03 08:39:25,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:25,822 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-10-03 08:39:25,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:39:25,822 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-10-03 08:39:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:39:25,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:25,823 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:25,823 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:25,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:25,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1044440416, now seen corresponding path program 28 times [2018-10-03 08:39:25,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:25,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:25,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:25,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:25,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:26,293 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:26,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:26,293 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 [2018-10-03 08:39:26,301 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:26,350 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:26,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:26,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:26,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:26,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:39:26,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:39:26,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:39:26,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:39:26,390 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2018-10-03 08:39:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:26,478 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2018-10-03 08:39:26,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:39:26,478 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2018-10-03 08:39:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:26,479 INFO L225 Difference]: With dead ends: 91 [2018-10-03 08:39:26,479 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:39:26,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:39:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:39:26,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:39:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:39:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-10-03 08:39:26,486 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-10-03 08:39:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:26,486 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-10-03 08:39:26,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:39:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-10-03 08:39:26,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:39:26,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:26,487 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:26,487 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:26,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:26,488 INFO L82 PathProgramCache]: Analyzing trace with hash 291726684, now seen corresponding path program 29 times [2018-10-03 08:39:26,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:26,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:26,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:26,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:26,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:27,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:27,072 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 [2018-10-03 08:39:27,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:27,147 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 08:39:27,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:27,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:27,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:27,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:39:27,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:39:27,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:39:27,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:39:27,189 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2018-10-03 08:39:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:27,307 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2018-10-03 08:39:27,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:39:27,308 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2018-10-03 08:39:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:27,309 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:39:27,309 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:39:27,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:39:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:39:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:39:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:39:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-10-03 08:39:27,316 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2018-10-03 08:39:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:27,316 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-10-03 08:39:27,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:39:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-10-03 08:39:27,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:39:27,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:27,317 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:27,317 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:27,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1511664040, now seen corresponding path program 30 times [2018-10-03 08:39:27,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:27,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:27,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:27,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:27,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:27,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:27,914 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 [2018-10-03 08:39:27,922 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:27,991 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-03 08:39:27,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:27,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:28,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:28,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:39:28,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:39:28,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:39:28,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:39:28,035 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2018-10-03 08:39:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:28,102 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2018-10-03 08:39:28,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:39:28,102 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-10-03 08:39:28,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:28,103 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:39:28,103 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:39:28,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:39:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:39:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:39:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:39:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-10-03 08:39:28,109 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2018-10-03 08:39:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:28,109 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-10-03 08:39:28,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:39:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-10-03 08:39:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:39:28,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:28,110 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:28,110 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:28,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:28,111 INFO L82 PathProgramCache]: Analyzing trace with hash 596637780, now seen corresponding path program 31 times [2018-10-03 08:39:28,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:28,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:28,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:28,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:28,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:28,846 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:39:28,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:28,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:28,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:28,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:39:28,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:39:28,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:39:28,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:39:28,942 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2018-10-03 08:39:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:29,046 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2018-10-03 08:39:29,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:39:29,048 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2018-10-03 08:39:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:29,048 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:39:29,049 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:39:29,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:39:29,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:39:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:39:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:39:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-10-03 08:39:29,054 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-10-03 08:39:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:29,054 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-10-03 08:39:29,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:39:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-10-03 08:39:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:39:29,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:29,055 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:29,055 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:29,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:29,056 INFO L82 PathProgramCache]: Analyzing trace with hash -549876912, now seen corresponding path program 32 times [2018-10-03 08:39:29,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:29,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:29,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:29,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:29,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:29,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:29,898 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 [2018-10-03 08:39:29,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:29,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:29,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:29,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:29,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:29,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:39:29,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:39:29,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:39:29,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:39:29,996 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2018-10-03 08:39:30,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:30,175 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2018-10-03 08:39:30,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:39:30,175 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2018-10-03 08:39:30,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:30,176 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:39:30,176 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:39:30,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:39:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:39:30,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:39:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:39:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-03 08:39:30,181 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2018-10-03 08:39:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:30,181 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-03 08:39:30,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:39:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-03 08:39:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:39:30,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:30,182 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:30,182 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:30,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1456099148, now seen corresponding path program 33 times [2018-10-03 08:39:30,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:30,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:30,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:30,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:30,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:30,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:30,781 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 [2018-10-03 08:39:30,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:30,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-10-03 08:39:30,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:30,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:30,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:30,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:39:30,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:39:30,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:39:30,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:39:30,916 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2018-10-03 08:39:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:31,088 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-10-03 08:39:31,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:39:31,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2018-10-03 08:39:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:31,090 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:39:31,090 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:39:31,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:39:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:39:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:39:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:39:31,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-03 08:39:31,095 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2018-10-03 08:39:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:31,095 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-03 08:39:31,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:39:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-03 08:39:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:39:31,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:31,096 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:31,097 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:31,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash 758776904, now seen corresponding path program 34 times [2018-10-03 08:39:31,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:31,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:31,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:31,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:32,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:32,187 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 [2018-10-03 08:39:32,194 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:32,244 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:32,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:32,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:32,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:32,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:39:32,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:39:32,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:39:32,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:39:32,288 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2018-10-03 08:39:32,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:32,422 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-10-03 08:39:32,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:39:32,422 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2018-10-03 08:39:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:32,423 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:39:32,423 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:39:32,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:39:32,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:39:32,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:39:32,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:39:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2018-10-03 08:39:32,428 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2018-10-03 08:39:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:32,428 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2018-10-03 08:39:32,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:39:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2018-10-03 08:39:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:39:32,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:32,428 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:32,429 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:32,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:32,429 INFO L82 PathProgramCache]: Analyzing trace with hash 646998596, now seen corresponding path program 35 times [2018-10-03 08:39:32,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:32,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:32,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:32,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:32,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:33,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:33,243 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 [2018-10-03 08:39:33,251 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:33,358 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 08:39:33,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:33,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:33,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:33,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:39:33,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:39:33,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:39:33,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:39:33,423 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2018-10-03 08:39:33,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:33,666 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2018-10-03 08:39:33,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:39:33,667 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2018-10-03 08:39:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:33,668 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:39:33,668 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:39:33,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:39:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:39:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:39:33,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:39:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-03 08:39:33,674 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2018-10-03 08:39:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:33,675 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-03 08:39:33,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:39:33,675 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-03 08:39:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:39:33,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:33,675 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:33,676 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:33,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:33,676 INFO L82 PathProgramCache]: Analyzing trace with hash 602227008, now seen corresponding path program 36 times [2018-10-03 08:39:33,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:33,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:33,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:33,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:33,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:34,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:34,324 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 [2018-10-03 08:39:34,332 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:34,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-03 08:39:34,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:34,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:34,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:34,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:39:34,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:39:34,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:39:34,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:39:34,474 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states. [2018-10-03 08:39:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:34,603 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-10-03 08:39:34,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:39:34,603 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2018-10-03 08:39:34,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:34,604 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:39:34,604 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:39:34,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:39:34,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:39:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:39:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:39:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2018-10-03 08:39:34,608 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2018-10-03 08:39:34,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:34,609 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2018-10-03 08:39:34,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:39:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2018-10-03 08:39:34,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:39:34,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:34,609 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:34,609 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:34,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:34,610 INFO L82 PathProgramCache]: Analyzing trace with hash 526403900, now seen corresponding path program 37 times [2018-10-03 08:39:34,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:34,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:34,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:34,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:34,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:35,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:35,789 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 [2018-10-03 08:39:35,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:35,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:35,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:35,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:39:35,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:39:35,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:39:35,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:39:35,900 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2018-10-03 08:39:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:35,994 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-10-03 08:39:35,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:39:35,995 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2018-10-03 08:39:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:35,996 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:39:35,996 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:39:35,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:39:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:39:36,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:39:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:39:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-03 08:39:36,003 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-10-03 08:39:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:36,004 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-03 08:39:36,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:39:36,004 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-03 08:39:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:39:36,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:36,004 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:36,005 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:36,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash 674841144, now seen corresponding path program 38 times [2018-10-03 08:39:36,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:36,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:36,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:36,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:37,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:37,419 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 [2018-10-03 08:39:37,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:37,485 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:37,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:37,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:37,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:37,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:39:37,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:39:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:39:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:39:37,540 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 42 states. [2018-10-03 08:39:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:38,627 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2018-10-03 08:39:38,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:39:38,627 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2018-10-03 08:39:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:38,628 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:39:38,628 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:39:38,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:39:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:39:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:39:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:39:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-10-03 08:39:38,634 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2018-10-03 08:39:38,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:38,634 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-10-03 08:39:38,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:39:38,634 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-10-03 08:39:38,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:39:38,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:38,635 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:38,635 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:38,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:38,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1589111860, now seen corresponding path program 39 times [2018-10-03 08:39:38,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:38,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:38,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:38,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:38,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:39,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:39,547 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 [2018-10-03 08:39:39,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:39,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-10-03 08:39:39,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:39,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:39,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:39,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:39:39,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:39:39,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:39:39,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:39:39,771 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2018-10-03 08:39:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:39,994 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2018-10-03 08:39:39,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:39:39,994 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2018-10-03 08:39:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:39,995 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:39:39,995 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:39:39,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:39:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:39:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:39:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:39:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2018-10-03 08:39:40,002 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2018-10-03 08:39:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:40,002 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2018-10-03 08:39:40,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:39:40,002 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2018-10-03 08:39:40,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:39:40,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:40,003 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:40,003 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:40,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:40,004 INFO L82 PathProgramCache]: Analyzing trace with hash -265025744, now seen corresponding path program 40 times [2018-10-03 08:39:40,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:40,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:40,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:40,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:40,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:41,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:41,184 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 [2018-10-03 08:39:41,193 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:41,256 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:41,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:41,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:41,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:41,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:39:41,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:39:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:39:41,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:39:41,315 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2018-10-03 08:39:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:42,566 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2018-10-03 08:39:42,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:39:42,566 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2018-10-03 08:39:42,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:42,567 INFO L225 Difference]: With dead ends: 115 [2018-10-03 08:39:42,567 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:39:42,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:39:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:39:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:39:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:39:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-03 08:39:42,574 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-10-03 08:39:42,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:42,574 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-03 08:39:42,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:39:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-03 08:39:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:39:42,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:42,575 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:42,576 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:42,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:42,576 INFO L82 PathProgramCache]: Analyzing trace with hash 320164652, now seen corresponding path program 41 times [2018-10-03 08:39:42,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:42,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:42,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:42,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:42,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:43,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:43,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:43,431 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 [2018-10-03 08:39:43,439 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:43,531 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-03 08:39:43,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:43,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:43,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:43,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:39:43,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:39:43,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:39:43,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:39:43,573 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 45 states. [2018-10-03 08:39:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:43,941 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2018-10-03 08:39:43,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:39:43,941 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2018-10-03 08:39:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:43,943 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:39:43,943 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:39:43,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:39:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:39:43,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:39:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:39:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-10-03 08:39:43,951 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2018-10-03 08:39:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:43,952 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-10-03 08:39:43,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:39:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-10-03 08:39:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:39:43,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:43,953 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:43,953 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:43,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash 47419432, now seen corresponding path program 42 times [2018-10-03 08:39:43,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:43,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:43,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:43,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:43,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:45,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:45,053 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 [2018-10-03 08:39:45,062 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:45,162 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-03 08:39:45,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:45,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:45,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:45,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:39:45,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:39:45,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:39:45,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:39:45,203 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2018-10-03 08:39:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:45,384 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2018-10-03 08:39:45,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:39:45,384 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2018-10-03 08:39:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:45,385 INFO L225 Difference]: With dead ends: 119 [2018-10-03 08:39:45,386 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:39:45,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:39:45,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:39:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:39:45,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:39:45,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-03 08:39:45,392 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2018-10-03 08:39:45,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:45,392 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-03 08:39:45,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:39:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-03 08:39:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:39:45,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:45,393 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:45,393 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:45,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash -67731932, now seen corresponding path program 43 times [2018-10-03 08:39:45,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:45,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:45,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:45,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:45,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:46,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:46,491 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 [2018-10-03 08:39:46,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:46,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:46,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:46,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:39:46,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:39:46,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:39:46,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:39:46,616 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-03 08:39:46,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:46,978 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-10-03 08:39:46,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:39:46,979 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-03 08:39:46,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:46,980 INFO L225 Difference]: With dead ends: 121 [2018-10-03 08:39:46,980 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:39:46,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:39:46,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:39:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:39:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:39:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2018-10-03 08:39:46,986 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2018-10-03 08:39:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:46,986 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2018-10-03 08:39:46,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:39:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2018-10-03 08:39:46,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:39:46,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:46,987 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:46,987 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:46,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:46,988 INFO L82 PathProgramCache]: Analyzing trace with hash 940956960, now seen corresponding path program 44 times [2018-10-03 08:39:46,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:46,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:46,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:46,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:46,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:48,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:48,090 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 [2018-10-03 08:39:48,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:48,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:48,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:48,183 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:48,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:48,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:39:48,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:39:48,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:39:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:39:48,224 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 48 states. [2018-10-03 08:39:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:48,366 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2018-10-03 08:39:48,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:39:48,366 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2018-10-03 08:39:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:48,367 INFO L225 Difference]: With dead ends: 123 [2018-10-03 08:39:48,367 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:39:48,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:39:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:39:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:39:48,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:39:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-10-03 08:39:48,375 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2018-10-03 08:39:48,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:48,375 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-10-03 08:39:48,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:39:48,375 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-10-03 08:39:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:39:48,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:48,376 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:48,376 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:48,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:48,377 INFO L82 PathProgramCache]: Analyzing trace with hash -371626724, now seen corresponding path program 45 times [2018-10-03 08:39:48,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:48,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:48,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:48,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:48,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:49,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:49,651 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 [2018-10-03 08:39:49,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:49,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-10-03 08:39:49,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:49,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:49,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:49,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:39:49,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:39:49,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:39:49,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:39:49,825 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 49 states. [2018-10-03 08:39:49,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:50,000 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2018-10-03 08:39:50,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:39:50,001 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2018-10-03 08:39:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:50,002 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:39:50,002 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:39:50,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:39:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:39:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:39:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:39:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-10-03 08:39:50,009 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2018-10-03 08:39:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:50,009 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-10-03 08:39:50,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:39:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-10-03 08:39:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:39:50,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:50,010 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:50,010 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:50,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:50,011 INFO L82 PathProgramCache]: Analyzing trace with hash 955837976, now seen corresponding path program 46 times [2018-10-03 08:39:50,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:50,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:50,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:50,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:50,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:51,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:51,287 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 [2018-10-03 08:39:51,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:51,378 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:51,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:51,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:51,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:51,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:39:51,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:39:51,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:39:51,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:39:51,433 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 50 states. [2018-10-03 08:39:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:51,563 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2018-10-03 08:39:51,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:39:51,563 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2018-10-03 08:39:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:51,564 INFO L225 Difference]: With dead ends: 127 [2018-10-03 08:39:51,564 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:39:51,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:39:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:39:51,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 08:39:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 08:39:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-10-03 08:39:51,569 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-10-03 08:39:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:51,570 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-10-03 08:39:51,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:39:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-10-03 08:39:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 08:39:51,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:51,571 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:51,571 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:51,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:51,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1044127764, now seen corresponding path program 47 times [2018-10-03 08:39:51,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:51,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:51,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:51,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:51,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:52,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:52,670 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 [2018-10-03 08:39:52,677 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:52,799 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-03 08:39:52,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:52,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:52,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:52,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:39:52,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:39:52,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:39:52,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:39:52,858 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 51 states. [2018-10-03 08:39:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:53,042 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2018-10-03 08:39:53,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:39:53,044 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2018-10-03 08:39:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:53,045 INFO L225 Difference]: With dead ends: 129 [2018-10-03 08:39:53,045 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:39:53,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:39:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:39:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 08:39:53,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:39:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-03 08:39:53,051 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2018-10-03 08:39:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:53,052 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-03 08:39:53,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:39:53,052 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-03 08:39:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:39:53,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:53,053 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:53,053 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:53,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash -8731888, now seen corresponding path program 48 times [2018-10-03 08:39:53,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:53,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:53,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:53,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:53,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:54,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:54,139 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 [2018-10-03 08:39:54,146 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:54,264 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-03 08:39:54,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:54,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:54,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:54,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:39:54,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:39:54,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:39:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:39:54,310 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 52 states. [2018-10-03 08:39:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:54,478 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2018-10-03 08:39:54,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:39:54,478 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2018-10-03 08:39:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:54,479 INFO L225 Difference]: With dead ends: 131 [2018-10-03 08:39:54,479 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 08:39:54,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:39:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 08:39:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-03 08:39:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-03 08:39:54,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2018-10-03 08:39:54,485 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2018-10-03 08:39:54,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:54,485 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2018-10-03 08:39:54,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:39:54,485 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2018-10-03 08:39:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 08:39:54,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:54,485 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:54,486 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:54,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:54,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1805424396, now seen corresponding path program 49 times [2018-10-03 08:39:54,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:54,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:54,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:54,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:54,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:55,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:55,974 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 [2018-10-03 08:39:55,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:56,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:56,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:56,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:39:56,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:39:56,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:39:56,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:39:56,124 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 53 states. [2018-10-03 08:39:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:56,402 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2018-10-03 08:39:56,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:39:56,402 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2018-10-03 08:39:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:56,403 INFO L225 Difference]: With dead ends: 133 [2018-10-03 08:39:56,403 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:39:56,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:39:56,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:39:56,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-03 08:39:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:39:56,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-03 08:39:56,410 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-10-03 08:39:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:56,410 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-03 08:39:56,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:39:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-03 08:39:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:39:56,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:56,411 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:56,412 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:56,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1452891144, now seen corresponding path program 50 times [2018-10-03 08:39:56,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:56,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:56,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:56,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:56,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:57,513 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:57,513 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 [2018-10-03 08:39:57,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:57,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:57,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:57,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:57,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:57,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:39:57,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:39:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:39:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:39:57,662 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 54 states. [2018-10-03 08:39:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:57,934 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-03 08:39:57,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:39:57,934 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2018-10-03 08:39:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:57,936 INFO L225 Difference]: With dead ends: 135 [2018-10-03 08:39:57,936 INFO L226 Difference]: Without dead ends: 121 [2018-10-03 08:39:57,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:39:57,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-03 08:39:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-03 08:39:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-03 08:39:57,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-03 08:39:57,944 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2018-10-03 08:39:57,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:57,944 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-03 08:39:57,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:39:57,944 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-03 08:39:57,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-03 08:39:57,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:57,945 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:57,945 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:57,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1970852356, now seen corresponding path program 51 times [2018-10-03 08:39:57,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:57,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:57,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:57,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:57,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:59,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:59,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:59,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:39:59,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:59,148 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-10-03 08:39:59,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:59,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:59,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:39:59,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:59,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:39:59,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:39:59,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:39:59,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:39:59,209 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 55 states. [2018-10-03 08:39:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:59,349 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2018-10-03 08:39:59,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:39:59,349 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2018-10-03 08:39:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:59,350 INFO L225 Difference]: With dead ends: 137 [2018-10-03 08:39:59,350 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 08:39:59,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:39:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 08:39:59,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-03 08:39:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-03 08:39:59,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2018-10-03 08:39:59,357 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2018-10-03 08:39:59,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:59,357 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2018-10-03 08:39:59,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:39:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2018-10-03 08:39:59,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 08:39:59,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:59,358 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:59,359 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:59,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:59,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1515370752, now seen corresponding path program 52 times [2018-10-03 08:39:59,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:59,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:59,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:59,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:59,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:00,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:00,888 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 [2018-10-03 08:40:00,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:00,968 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:00,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:00,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:01,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:01,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:01,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:40:01,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:40:01,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:40:01,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:40:01,038 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 56 states. [2018-10-03 08:40:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:01,152 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-10-03 08:40:01,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:40:01,152 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2018-10-03 08:40:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:01,153 INFO L225 Difference]: With dead ends: 139 [2018-10-03 08:40:01,153 INFO L226 Difference]: Without dead ends: 125 [2018-10-03 08:40:01,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:40:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-03 08:40:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-03 08:40:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-03 08:40:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-10-03 08:40:01,158 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2018-10-03 08:40:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:01,158 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-10-03 08:40:01,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:40:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-10-03 08:40:01,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-03 08:40:01,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:01,159 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:01,159 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:01,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:01,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1884213500, now seen corresponding path program 53 times [2018-10-03 08:40:01,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:01,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:01,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:01,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:01,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:02,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:02,435 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 [2018-10-03 08:40:02,447 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:02,627 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-03 08:40:02,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:02,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:02,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:02,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:40:02,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:40:02,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:40:02,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:40:02,676 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 57 states. [2018-10-03 08:40:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:02,826 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2018-10-03 08:40:02,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:40:02,829 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2018-10-03 08:40:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:02,830 INFO L225 Difference]: With dead ends: 141 [2018-10-03 08:40:02,830 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 08:40:02,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:40:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 08:40:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-03 08:40:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 08:40:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-10-03 08:40:02,836 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2018-10-03 08:40:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:02,836 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-10-03 08:40:02,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:40:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-10-03 08:40:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-03 08:40:02,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:02,837 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:02,838 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:02,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash -140191240, now seen corresponding path program 54 times [2018-10-03 08:40:02,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:02,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:02,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:02,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:02,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:04,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:04,145 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 [2018-10-03 08:40:04,153 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:04,288 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-10-03 08:40:04,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:04,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:04,346 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:04,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:40:04,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:40:04,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:40:04,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:40:04,347 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 58 states. [2018-10-03 08:40:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:04,577 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2018-10-03 08:40:04,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:40:04,578 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2018-10-03 08:40:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:04,579 INFO L225 Difference]: With dead ends: 143 [2018-10-03 08:40:04,579 INFO L226 Difference]: Without dead ends: 129 [2018-10-03 08:40:04,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:40:04,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-03 08:40:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-03 08:40:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 08:40:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-03 08:40:04,585 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2018-10-03 08:40:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:04,585 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-03 08:40:04,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:40:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-03 08:40:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 08:40:04,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:04,586 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:04,586 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:04,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:04,586 INFO L82 PathProgramCache]: Analyzing trace with hash 27038708, now seen corresponding path program 55 times [2018-10-03 08:40:04,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:04,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:04,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:04,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:04,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:06,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:06,224 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 [2018-10-03 08:40:06,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:06,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:06,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:06,355 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:40:06,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:40:06,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:40:06,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:40:06,356 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-03 08:40:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:06,512 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2018-10-03 08:40:06,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:40:06,513 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-03 08:40:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:06,514 INFO L225 Difference]: With dead ends: 145 [2018-10-03 08:40:06,514 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:40:06,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:40:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:40:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-03 08:40:06,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 08:40:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-03 08:40:06,518 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-10-03 08:40:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:06,518 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-03 08:40:06,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:40:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-03 08:40:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-03 08:40:06,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:06,519 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:06,519 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:06,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:06,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1821228784, now seen corresponding path program 56 times [2018-10-03 08:40:06,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:06,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:06,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:06,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:06,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:07,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:07,921 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 [2018-10-03 08:40:07,928 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:08,011 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:08,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:08,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:08,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:08,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:40:08,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:40:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:40:08,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:40:08,075 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 60 states. [2018-10-03 08:40:08,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:08,357 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2018-10-03 08:40:08,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:40:08,358 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 130 [2018-10-03 08:40:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:08,359 INFO L225 Difference]: With dead ends: 147 [2018-10-03 08:40:08,359 INFO L226 Difference]: Without dead ends: 133 [2018-10-03 08:40:08,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:40:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-03 08:40:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-03 08:40:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 08:40:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-03 08:40:08,365 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 130 [2018-10-03 08:40:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:08,365 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-03 08:40:08,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:40:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-03 08:40:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 08:40:08,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:08,366 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:08,367 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:08,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:08,367 INFO L82 PathProgramCache]: Analyzing trace with hash -538961172, now seen corresponding path program 57 times [2018-10-03 08:40:08,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:08,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:08,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:08,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:08,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:09,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:09,663 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 [2018-10-03 08:40:09,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:09,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-10-03 08:40:09,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:09,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:09,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:09,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:40:09,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:40:09,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:40:09,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:40:09,871 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 61 states. [2018-10-03 08:40:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:09,975 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2018-10-03 08:40:09,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:40:09,976 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 132 [2018-10-03 08:40:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:09,977 INFO L225 Difference]: With dead ends: 149 [2018-10-03 08:40:09,977 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 08:40:09,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:40:09,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 08:40:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-03 08:40:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 08:40:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-10-03 08:40:09,983 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 132 [2018-10-03 08:40:09,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:09,983 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-10-03 08:40:09,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:40:09,983 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-10-03 08:40:09,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 08:40:09,984 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:09,984 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:09,984 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:09,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:09,984 INFO L82 PathProgramCache]: Analyzing trace with hash -938776600, now seen corresponding path program 58 times [2018-10-03 08:40:09,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:09,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:09,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:09,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:09,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:11,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:11,856 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 [2018-10-03 08:40:11,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:11,947 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:11,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:11,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:12,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:12,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:40:12,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:40:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:40:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:40:12,011 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 62 states. [2018-10-03 08:40:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:12,185 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2018-10-03 08:40:12,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:40:12,185 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 134 [2018-10-03 08:40:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:12,186 INFO L225 Difference]: With dead ends: 151 [2018-10-03 08:40:12,186 INFO L226 Difference]: Without dead ends: 137 [2018-10-03 08:40:12,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:40:12,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-03 08:40:12,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-03 08:40:12,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-03 08:40:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-10-03 08:40:12,191 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-10-03 08:40:12,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:12,191 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-10-03 08:40:12,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:40:12,192 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-10-03 08:40:12,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-03 08:40:12,192 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:12,192 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:12,192 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:12,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1385653732, now seen corresponding path program 59 times [2018-10-03 08:40:12,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:12,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:12,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:12,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:12,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:13,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:13,600 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 [2018-10-03 08:40:13,608 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:13,759 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-10-03 08:40:13,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:13,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:13,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:13,822 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:40:13,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:40:13,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:40:13,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:40:13,824 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 63 states. [2018-10-03 08:40:13,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:13,939 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2018-10-03 08:40:13,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:40:13,940 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 136 [2018-10-03 08:40:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:13,941 INFO L225 Difference]: With dead ends: 153 [2018-10-03 08:40:13,941 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 08:40:13,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:40:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 08:40:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-03 08:40:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 08:40:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-10-03 08:40:13,949 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 136 [2018-10-03 08:40:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:13,949 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-10-03 08:40:13,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:40:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-10-03 08:40:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:40:13,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:13,950 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:13,950 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:13,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1780208864, now seen corresponding path program 60 times [2018-10-03 08:40:13,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:13,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:13,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:13,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:13,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:15,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:15,743 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 [2018-10-03 08:40:15,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:15,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-10-03 08:40:15,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:15,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:15,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:15,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:40:15,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:40:15,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:40:15,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:40:15,974 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 64 states. [2018-10-03 08:40:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:16,850 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2018-10-03 08:40:16,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:40:16,850 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 138 [2018-10-03 08:40:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:16,851 INFO L225 Difference]: With dead ends: 155 [2018-10-03 08:40:16,852 INFO L226 Difference]: Without dead ends: 141 [2018-10-03 08:40:16,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:40:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-03 08:40:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-03 08:40:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-03 08:40:16,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-10-03 08:40:16,858 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 138 [2018-10-03 08:40:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:16,858 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-10-03 08:40:16,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:40:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-10-03 08:40:16,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-03 08:40:16,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:16,860 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:16,860 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:16,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:16,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1304398628, now seen corresponding path program 61 times [2018-10-03 08:40:16,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:16,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:16,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:16,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:16,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:18,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:18,355 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 [2018-10-03 08:40:18,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:18,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:18,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:18,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:40:18,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:40:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:40:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:40:18,497 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 65 states. [2018-10-03 08:40:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:18,679 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-10-03 08:40:18,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:40:18,679 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 140 [2018-10-03 08:40:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:18,680 INFO L225 Difference]: With dead ends: 157 [2018-10-03 08:40:18,680 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:40:18,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:40:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:40:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-03 08:40:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 08:40:18,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-03 08:40:18,685 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-10-03 08:40:18,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:18,685 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-03 08:40:18,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:40:18,686 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-03 08:40:18,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:40:18,686 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:18,686 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:18,686 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:18,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:18,687 INFO L82 PathProgramCache]: Analyzing trace with hash -2084764200, now seen corresponding path program 62 times [2018-10-03 08:40:18,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:18,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:18,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:18,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:20,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:20,181 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 [2018-10-03 08:40:20,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:20,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:20,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:20,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:20,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:20,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:40:20,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:40:20,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:40:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:40:20,342 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 66 states. [2018-10-03 08:40:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:21,038 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2018-10-03 08:40:21,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:40:21,039 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 142 [2018-10-03 08:40:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:21,040 INFO L225 Difference]: With dead ends: 159 [2018-10-03 08:40:21,040 INFO L226 Difference]: Without dead ends: 145 [2018-10-03 08:40:21,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:40:21,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-03 08:40:21,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-03 08:40:21,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-03 08:40:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-03 08:40:21,049 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 142 [2018-10-03 08:40:21,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:21,049 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-03 08:40:21,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:40:21,050 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-03 08:40:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-03 08:40:21,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:21,050 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:21,051 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:21,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:21,051 INFO L82 PathProgramCache]: Analyzing trace with hash -396802092, now seen corresponding path program 63 times [2018-10-03 08:40:21,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:21,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:21,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:21,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:22,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:22,681 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 [2018-10-03 08:40:22,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:22,865 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-10-03 08:40:22,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:22,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:22,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:22,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:40:22,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:40:22,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:40:22,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:40:22,914 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 67 states. [2018-10-03 08:40:23,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:23,110 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2018-10-03 08:40:23,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:40:23,110 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 144 [2018-10-03 08:40:23,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:23,111 INFO L225 Difference]: With dead ends: 161 [2018-10-03 08:40:23,111 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 08:40:23,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:40:23,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 08:40:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-03 08:40:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 08:40:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-03 08:40:23,118 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 144 [2018-10-03 08:40:23,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:23,118 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-03 08:40:23,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:40:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-03 08:40:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 08:40:23,119 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:23,119 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:23,119 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:23,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:23,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1762854192, now seen corresponding path program 64 times [2018-10-03 08:40:23,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:23,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:23,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:23,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:24,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:24,756 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 [2018-10-03 08:40:24,764 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:24,857 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:24,857 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:24,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:24,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:24,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:40:24,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:40:24,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:40:24,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:40:24,923 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 68 states. [2018-10-03 08:40:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:25,161 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2018-10-03 08:40:25,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:40:25,161 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 146 [2018-10-03 08:40:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:25,163 INFO L225 Difference]: With dead ends: 163 [2018-10-03 08:40:25,163 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 08:40:25,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:40:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 08:40:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-03 08:40:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-03 08:40:25,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-10-03 08:40:25,170 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-10-03 08:40:25,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:25,171 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-10-03 08:40:25,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:40:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-10-03 08:40:25,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-03 08:40:25,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:25,172 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:25,172 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:25,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:25,172 INFO L82 PathProgramCache]: Analyzing trace with hash -278929716, now seen corresponding path program 65 times [2018-10-03 08:40:25,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:25,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:25,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:25,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:27,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:27,182 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 [2018-10-03 08:40:27,190 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:27,365 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-10-03 08:40:27,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:27,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:27,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:27,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:40:27,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:40:27,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:40:27,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:40:27,416 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 69 states. [2018-10-03 08:40:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:27,615 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2018-10-03 08:40:27,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:40:27,615 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 148 [2018-10-03 08:40:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:27,616 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:40:27,616 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 08:40:27,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:40:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 08:40:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-03 08:40:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 08:40:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-03 08:40:27,623 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2018-10-03 08:40:27,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:27,624 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-03 08:40:27,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:40:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-03 08:40:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-03 08:40:27,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:27,625 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:27,625 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:27,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:27,625 INFO L82 PathProgramCache]: Analyzing trace with hash -156650552, now seen corresponding path program 66 times [2018-10-03 08:40:27,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:27,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:27,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:27,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:29,397 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:29,398 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 [2018-10-03 08:40:29,404 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:29,582 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-10-03 08:40:29,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:29,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:29,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:29,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:40:29,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:40:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:40:29,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:40:29,648 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 70 states. [2018-10-03 08:40:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:29,856 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2018-10-03 08:40:29,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:40:29,857 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 150 [2018-10-03 08:40:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:29,857 INFO L225 Difference]: With dead ends: 167 [2018-10-03 08:40:29,858 INFO L226 Difference]: Without dead ends: 153 [2018-10-03 08:40:29,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:40:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-03 08:40:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-03 08:40:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-03 08:40:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2018-10-03 08:40:29,863 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2018-10-03 08:40:29,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:29,864 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2018-10-03 08:40:29,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:40:29,864 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2018-10-03 08:40:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 08:40:29,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:29,864 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:29,865 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:29,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:29,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1389509060, now seen corresponding path program 67 times [2018-10-03 08:40:29,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:29,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:29,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:29,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:29,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:32,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:32,043 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 [2018-10-03 08:40:32,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:32,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:32,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:32,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:40:32,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:40:32,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:40:32,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:40:32,205 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 71 states. [2018-10-03 08:40:32,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:32,421 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2018-10-03 08:40:32,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:40:32,421 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 152 [2018-10-03 08:40:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:32,422 INFO L225 Difference]: With dead ends: 169 [2018-10-03 08:40:32,422 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 08:40:32,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:40:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 08:40:32,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-03 08:40:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 08:40:32,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-03 08:40:32,429 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-10-03 08:40:32,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:32,430 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-03 08:40:32,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:40:32,430 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-03 08:40:32,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-03 08:40:32,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:32,430 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:32,431 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:32,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:32,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1190211776, now seen corresponding path program 68 times [2018-10-03 08:40:32,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:32,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:32,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:32,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:34,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:34,187 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 [2018-10-03 08:40:34,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:34,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:34,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:34,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:34,364 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:34,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:40:34,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:40:34,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:40:34,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:40:34,367 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 72 states. [2018-10-03 08:40:34,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:34,943 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-10-03 08:40:34,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:40:34,944 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 154 [2018-10-03 08:40:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:34,945 INFO L225 Difference]: With dead ends: 171 [2018-10-03 08:40:34,945 INFO L226 Difference]: Without dead ends: 157 [2018-10-03 08:40:34,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:40:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-03 08:40:34,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-03 08:40:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 08:40:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-03 08:40:34,951 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 154 [2018-10-03 08:40:34,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:34,951 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-03 08:40:34,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:40:34,951 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-03 08:40:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-03 08:40:34,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:34,952 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:34,952 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:34,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:34,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1355917124, now seen corresponding path program 69 times [2018-10-03 08:40:34,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:34,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:34,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:34,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:34,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:37,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:37,068 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 [2018-10-03 08:40:37,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:37,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-10-03 08:40:37,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:37,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:37,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:37,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:40:37,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:40:37,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:40:37,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:40:37,343 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 73 states. [2018-10-03 08:40:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:37,483 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2018-10-03 08:40:37,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:40:37,483 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 156 [2018-10-03 08:40:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:37,484 INFO L225 Difference]: With dead ends: 173 [2018-10-03 08:40:37,485 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 08:40:37,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:40:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 08:40:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-03 08:40:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 08:40:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2018-10-03 08:40:37,491 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 156 [2018-10-03 08:40:37,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:37,492 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2018-10-03 08:40:37,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:40:37,492 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2018-10-03 08:40:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:40:37,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:37,492 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:37,493 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:37,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash -54431304, now seen corresponding path program 70 times [2018-10-03 08:40:37,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:37,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:37,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:37,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:39,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:39,415 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 [2018-10-03 08:40:39,422 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:39,526 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:39,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:39,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:39,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:39,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:40:39,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:40:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:40:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:40:39,588 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 74 states. [2018-10-03 08:40:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:39,837 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-10-03 08:40:39,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:40:39,837 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 158 [2018-10-03 08:40:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:39,838 INFO L225 Difference]: With dead ends: 175 [2018-10-03 08:40:39,839 INFO L226 Difference]: Without dead ends: 161 [2018-10-03 08:40:39,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:40:39,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-03 08:40:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-03 08:40:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 08:40:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-03 08:40:39,846 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2018-10-03 08:40:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:39,846 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-03 08:40:39,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:40:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-03 08:40:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-03 08:40:39,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:39,847 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:39,847 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:39,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:39,848 INFO L82 PathProgramCache]: Analyzing trace with hash 837958580, now seen corresponding path program 71 times [2018-10-03 08:40:39,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:39,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:39,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:39,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:39,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:39,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:42,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:42,205 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 [2018-10-03 08:40:42,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:42,411 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-10-03 08:40:42,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:42,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:42,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:42,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:40:42,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:40:42,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:40:42,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:40:42,464 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 75 states. [2018-10-03 08:40:42,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:42,620 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2018-10-03 08:40:42,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:40:42,621 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 160 [2018-10-03 08:40:42,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:42,622 INFO L225 Difference]: With dead ends: 177 [2018-10-03 08:40:42,622 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 08:40:42,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:40:42,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 08:40:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-03 08:40:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 08:40:42,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-10-03 08:40:42,630 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 160 [2018-10-03 08:40:42,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:42,630 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-10-03 08:40:42,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:40:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-10-03 08:40:42,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 08:40:42,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:42,632 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:42,632 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:42,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:42,632 INFO L82 PathProgramCache]: Analyzing trace with hash -568822096, now seen corresponding path program 72 times [2018-10-03 08:40:42,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:42,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:42,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:42,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:42,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:44,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:44,624 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 [2018-10-03 08:40:44,632 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:44,848 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-10-03 08:40:44,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:44,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:44,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:44,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:40:44,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:40:44,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:40:44,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:40:44,903 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 76 states. [2018-10-03 08:40:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:45,156 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2018-10-03 08:40:45,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:40:45,156 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 162 [2018-10-03 08:40:45,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:45,157 INFO L225 Difference]: With dead ends: 179 [2018-10-03 08:40:45,157 INFO L226 Difference]: Without dead ends: 165 [2018-10-03 08:40:45,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:40:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-03 08:40:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-03 08:40:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-03 08:40:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-10-03 08:40:45,163 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 162 [2018-10-03 08:40:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:45,163 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-10-03 08:40:45,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:40:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-10-03 08:40:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-03 08:40:45,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:45,164 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:45,164 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:45,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:45,164 INFO L82 PathProgramCache]: Analyzing trace with hash 429646508, now seen corresponding path program 73 times [2018-10-03 08:40:45,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:45,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:45,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:45,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:45,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:47,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:47,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:47,605 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 [2018-10-03 08:40:47,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:47,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:47,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:47,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:40:47,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:40:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:40:47,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:40:47,791 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 77 states. [2018-10-03 08:40:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:48,001 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2018-10-03 08:40:48,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:40:48,002 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 164 [2018-10-03 08:40:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:48,003 INFO L225 Difference]: With dead ends: 181 [2018-10-03 08:40:48,003 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 08:40:48,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:40:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 08:40:48,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-03 08:40:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 08:40:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-10-03 08:40:48,008 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-10-03 08:40:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:48,008 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-10-03 08:40:48,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:40:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-10-03 08:40:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-03 08:40:48,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:48,009 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:48,009 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:48,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash -2114699352, now seen corresponding path program 74 times [2018-10-03 08:40:48,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:48,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:48,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:48,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:48,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:50,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:50,122 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 [2018-10-03 08:40:50,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:50,239 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:50,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:50,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:50,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:50,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:40:50,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:40:50,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:40:50,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:40:50,302 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 78 states. [2018-10-03 08:40:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:50,461 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2018-10-03 08:40:50,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:40:50,461 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 166 [2018-10-03 08:40:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:50,462 INFO L225 Difference]: With dead ends: 183 [2018-10-03 08:40:50,462 INFO L226 Difference]: Without dead ends: 169 [2018-10-03 08:40:50,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:40:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-03 08:40:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-03 08:40:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-03 08:40:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-10-03 08:40:50,470 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 166 [2018-10-03 08:40:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:50,470 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-10-03 08:40:50,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:40:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-10-03 08:40:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-03 08:40:50,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:50,471 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:50,471 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:50,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash 900287908, now seen corresponding path program 75 times [2018-10-03 08:40:50,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:50,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:50,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:50,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:50,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:52,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:52,933 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 [2018-10-03 08:40:52,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:53,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-10-03 08:40:53,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:53,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:53,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:53,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:40:53,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:40:53,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:40:53,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:40:53,219 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 79 states. [2018-10-03 08:40:53,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:53,407 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2018-10-03 08:40:53,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:40:53,407 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 168 [2018-10-03 08:40:53,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:53,408 INFO L225 Difference]: With dead ends: 185 [2018-10-03 08:40:53,408 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 08:40:53,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:40:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 08:40:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-03 08:40:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 08:40:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-03 08:40:53,415 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 168 [2018-10-03 08:40:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:53,415 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-03 08:40:53,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:40:53,415 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-03 08:40:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 08:40:53,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:53,416 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:53,416 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:53,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash -799880032, now seen corresponding path program 76 times [2018-10-03 08:40:53,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:53,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:53,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:53,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:53,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:55,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:55,602 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 [2018-10-03 08:40:55,609 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:55,715 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:55,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:55,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:55,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:55,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:40:55,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:40:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:40:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:40:55,787 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 80 states. [2018-10-03 08:40:55,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:55,949 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2018-10-03 08:40:55,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:40:55,949 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 170 [2018-10-03 08:40:55,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:55,950 INFO L225 Difference]: With dead ends: 187 [2018-10-03 08:40:55,950 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 08:40:55,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:40:55,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 08:40:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-03 08:40:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-03 08:40:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-10-03 08:40:55,958 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-10-03 08:40:55,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:55,958 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-10-03 08:40:55,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:40:55,958 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-10-03 08:40:55,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-03 08:40:55,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:55,959 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:55,959 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:55,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:55,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1721269404, now seen corresponding path program 77 times [2018-10-03 08:40:55,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:55,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:55,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:55,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:55,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:58,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:58,618 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 [2018-10-03 08:40:58,624 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:58,839 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-10-03 08:40:58,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:58,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:40:58,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:58,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:40:58,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:40:58,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:40:58,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:40:58,896 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 81 states. [2018-10-03 08:40:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:59,083 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2018-10-03 08:40:59,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:40:59,084 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 172 [2018-10-03 08:40:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:59,085 INFO L225 Difference]: With dead ends: 189 [2018-10-03 08:40:59,085 INFO L226 Difference]: Without dead ends: 175 [2018-10-03 08:40:59,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:40:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-03 08:40:59,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-03 08:40:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 08:40:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-03 08:40:59,094 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 172 [2018-10-03 08:40:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:59,095 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-03 08:40:59,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:40:59,095 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-03 08:40:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 08:40:59,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:59,096 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:40:59,096 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:59,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash -2110644840, now seen corresponding path program 78 times [2018-10-03 08:40:59,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:59,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:59,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:59,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:59,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:01,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:01,488 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 [2018-10-03 08:41:01,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:01,739 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-10-03 08:41:01,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:01,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:01,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:01,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:41:01,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:41:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:41:01,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:41:01,798 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 82 states. [2018-10-03 08:41:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:02,131 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2018-10-03 08:41:02,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:41:02,132 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 174 [2018-10-03 08:41:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:02,133 INFO L225 Difference]: With dead ends: 191 [2018-10-03 08:41:02,133 INFO L226 Difference]: Without dead ends: 177 [2018-10-03 08:41:02,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:41:02,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-03 08:41:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-03 08:41:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-03 08:41:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-10-03 08:41:02,139 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2018-10-03 08:41:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:02,140 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-10-03 08:41:02,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:41:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-10-03 08:41:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-03 08:41:02,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:02,141 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:02,141 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:02,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash 501706644, now seen corresponding path program 79 times [2018-10-03 08:41:02,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:02,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:02,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:02,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:02,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:04,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:04,545 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 [2018-10-03 08:41:04,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:04,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:04,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:04,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-03 08:41:04,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:41:04,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:41:04,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:41:04,716 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 83 states. [2018-10-03 08:41:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:04,913 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-10-03 08:41:04,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:41:04,913 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 176 [2018-10-03 08:41:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:04,914 INFO L225 Difference]: With dead ends: 193 [2018-10-03 08:41:04,914 INFO L226 Difference]: Without dead ends: 179 [2018-10-03 08:41:04,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:41:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-03 08:41:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-03 08:41:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-03 08:41:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2018-10-03 08:41:04,920 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2018-10-03 08:41:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:04,920 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2018-10-03 08:41:04,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:41:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2018-10-03 08:41:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 08:41:04,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:04,921 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:04,922 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:04,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1584385392, now seen corresponding path program 80 times [2018-10-03 08:41:04,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:04,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:04,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:04,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:04,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:07,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:07,685 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 [2018-10-03 08:41:07,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:07,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:07,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:07,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:07,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:07,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:41:07,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:41:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:41:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:41:07,888 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 84 states. [2018-10-03 08:41:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:08,194 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-03 08:41:08,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:41:08,195 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 178 [2018-10-03 08:41:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:08,196 INFO L225 Difference]: With dead ends: 195 [2018-10-03 08:41:08,196 INFO L226 Difference]: Without dead ends: 181 [2018-10-03 08:41:08,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:41:08,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-03 08:41:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-03 08:41:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-03 08:41:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-03 08:41:08,201 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2018-10-03 08:41:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:08,202 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-03 08:41:08,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:41:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-03 08:41:08,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-03 08:41:08,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:08,203 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:08,203 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:08,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash -569104756, now seen corresponding path program 81 times [2018-10-03 08:41:08,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:08,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:08,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:08,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:08,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:10,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:10,705 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 [2018-10-03 08:41:10,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:10,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-10-03 08:41:10,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:10,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:11,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:11,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-03 08:41:11,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:41:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:41:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:41:11,047 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 85 states. [2018-10-03 08:41:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:11,250 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2018-10-03 08:41:11,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:41:11,251 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 180 [2018-10-03 08:41:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:11,252 INFO L225 Difference]: With dead ends: 197 [2018-10-03 08:41:11,252 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 08:41:11,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:41:11,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 08:41:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-03 08:41:11,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-03 08:41:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2018-10-03 08:41:11,259 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2018-10-03 08:41:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:11,259 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2018-10-03 08:41:11,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:41:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2018-10-03 08:41:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 08:41:11,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:11,260 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:11,260 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:11,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:11,261 INFO L82 PathProgramCache]: Analyzing trace with hash 158010248, now seen corresponding path program 82 times [2018-10-03 08:41:11,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:11,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:11,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:11,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:11,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:14,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:14,053 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 [2018-10-03 08:41:14,061 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:14,175 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:14,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:14,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:14,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:14,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:14,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:41:14,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:41:14,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:41:14,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:41:14,234 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 86 states. [2018-10-03 08:41:14,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:14,448 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2018-10-03 08:41:14,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:41:14,449 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 182 [2018-10-03 08:41:14,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:14,449 INFO L225 Difference]: With dead ends: 199 [2018-10-03 08:41:14,450 INFO L226 Difference]: Without dead ends: 185 [2018-10-03 08:41:14,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:41:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-03 08:41:14,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-03 08:41:14,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 08:41:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-03 08:41:14,455 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-10-03 08:41:14,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:14,456 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-03 08:41:14,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:41:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-03 08:41:14,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-03 08:41:14,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:14,457 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:14,457 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:14,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:14,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1164140156, now seen corresponding path program 83 times [2018-10-03 08:41:14,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:14,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:14,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:14,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:14,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:17,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:17,293 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 [2018-10-03 08:41:17,300 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:17,539 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-10-03 08:41:17,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:17,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:17,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:17,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-03 08:41:17,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:41:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:41:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:41:17,620 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 87 states. [2018-10-03 08:41:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:17,961 INFO L93 Difference]: Finished difference Result 201 states and 205 transitions. [2018-10-03 08:41:17,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:41:17,962 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 184 [2018-10-03 08:41:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:17,963 INFO L225 Difference]: With dead ends: 201 [2018-10-03 08:41:17,963 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 08:41:17,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:41:17,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 08:41:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-03 08:41:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-03 08:41:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-10-03 08:41:17,970 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 184 [2018-10-03 08:41:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:17,971 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-10-03 08:41:17,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:41:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-10-03 08:41:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-03 08:41:17,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:17,972 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:17,972 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:17,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:17,973 INFO L82 PathProgramCache]: Analyzing trace with hash -440358784, now seen corresponding path program 84 times [2018-10-03 08:41:17,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:17,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:17,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:17,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:17,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:20,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:20,631 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 [2018-10-03 08:41:20,639 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:20,892 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-10-03 08:41:20,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:20,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:20,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:20,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:41:20,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:41:20,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:41:20,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:41:20,952 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 88 states. [2018-10-03 08:41:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:21,238 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-10-03 08:41:21,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:41:21,239 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 186 [2018-10-03 08:41:21,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:21,240 INFO L225 Difference]: With dead ends: 203 [2018-10-03 08:41:21,240 INFO L226 Difference]: Without dead ends: 189 [2018-10-03 08:41:21,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:41:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-03 08:41:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-03 08:41:21,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-03 08:41:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-03 08:41:21,248 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 186 [2018-10-03 08:41:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:21,249 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-03 08:41:21,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:41:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-03 08:41:21,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 08:41:21,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:21,250 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:21,250 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:21,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:21,251 INFO L82 PathProgramCache]: Analyzing trace with hash -671162244, now seen corresponding path program 85 times [2018-10-03 08:41:21,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:21,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:21,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:21,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:21,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:24,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:24,282 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 [2018-10-03 08:41:24,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:24,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:24,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:24,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-03 08:41:24,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:41:24,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:41:24,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:41:24,469 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 89 states. [2018-10-03 08:41:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:24,716 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2018-10-03 08:41:24,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:41:24,716 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 188 [2018-10-03 08:41:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:24,717 INFO L225 Difference]: With dead ends: 205 [2018-10-03 08:41:24,717 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 08:41:24,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:41:24,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 08:41:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-03 08:41:24,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 08:41:24,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-03 08:41:24,726 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-10-03 08:41:24,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:24,726 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-03 08:41:24,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:41:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-03 08:41:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-03 08:41:24,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:24,727 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:24,727 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:24,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash 865012088, now seen corresponding path program 86 times [2018-10-03 08:41:24,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:24,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:24,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:24,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:24,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:27,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:27,769 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 [2018-10-03 08:41:27,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:27,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:27,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:27,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:27,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:27,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:41:27,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:41:27,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:41:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:41:27,964 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 90 states. [2018-10-03 08:41:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:28,142 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2018-10-03 08:41:28,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:41:28,142 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 190 [2018-10-03 08:41:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:28,144 INFO L225 Difference]: With dead ends: 207 [2018-10-03 08:41:28,144 INFO L226 Difference]: Without dead ends: 193 [2018-10-03 08:41:28,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:41:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-03 08:41:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-03 08:41:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-03 08:41:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-10-03 08:41:28,150 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 190 [2018-10-03 08:41:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:28,150 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-10-03 08:41:28,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:41:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-10-03 08:41:28,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-03 08:41:28,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:28,151 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:28,151 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:28,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash -340204684, now seen corresponding path program 87 times [2018-10-03 08:41:28,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:28,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:28,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:28,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:28,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:31,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:31,044 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 [2018-10-03 08:41:31,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:31,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-10-03 08:41:31,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:31,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:31,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:31,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-03 08:41:31,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:41:31,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:41:31,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:41:31,395 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 91 states. [2018-10-03 08:41:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:31,681 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2018-10-03 08:41:31,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:41:31,681 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 192 [2018-10-03 08:41:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:31,682 INFO L225 Difference]: With dead ends: 209 [2018-10-03 08:41:31,682 INFO L226 Difference]: Without dead ends: 195 [2018-10-03 08:41:31,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:41:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-03 08:41:31,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-03 08:41:31,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-03 08:41:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-10-03 08:41:31,689 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 192 [2018-10-03 08:41:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:31,689 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-10-03 08:41:31,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:41:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-10-03 08:41:31,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-03 08:41:31,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:31,690 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:31,690 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:31,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1087647344, now seen corresponding path program 88 times [2018-10-03 08:41:31,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:31,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:31,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:31,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:31,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:35,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:35,065 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 [2018-10-03 08:41:35,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:35,193 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:35,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:35,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:35,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:35,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:41:35,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:41:35,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:41:35,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:41:35,256 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 92 states. [2018-10-03 08:41:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:35,487 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-10-03 08:41:35,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:41:35,487 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 194 [2018-10-03 08:41:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:35,488 INFO L225 Difference]: With dead ends: 211 [2018-10-03 08:41:35,488 INFO L226 Difference]: Without dead ends: 197 [2018-10-03 08:41:35,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:41:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-03 08:41:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-03 08:41:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-03 08:41:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2018-10-03 08:41:35,495 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 194 [2018-10-03 08:41:35,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:35,496 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2018-10-03 08:41:35,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:41:35,496 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2018-10-03 08:41:35,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-03 08:41:35,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:35,497 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:35,497 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:35,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:35,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1136088468, now seen corresponding path program 89 times [2018-10-03 08:41:35,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:35,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:35,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:35,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:35,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:38,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:38,852 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 [2018-10-03 08:41:38,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:39,136 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-10-03 08:41:39,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:39,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:39,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:39,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-03 08:41:39,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-03 08:41:39,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-03 08:41:39,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:41:39,201 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 93 states. [2018-10-03 08:41:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:39,531 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2018-10-03 08:41:39,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:41:39,532 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 196 [2018-10-03 08:41:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:39,532 INFO L225 Difference]: With dead ends: 213 [2018-10-03 08:41:39,533 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 08:41:39,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:41:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 08:41:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-03 08:41:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-03 08:41:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-10-03 08:41:39,538 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 196 [2018-10-03 08:41:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:39,539 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-10-03 08:41:39,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-03 08:41:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-10-03 08:41:39,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-03 08:41:39,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:39,540 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:39,540 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:39,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:39,540 INFO L82 PathProgramCache]: Analyzing trace with hash 747509608, now seen corresponding path program 90 times [2018-10-03 08:41:39,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:39,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:39,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:39,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:39,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:42,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:42,864 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 [2018-10-03 08:41:42,871 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:43,154 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-10-03 08:41:43,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:43,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:43,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:43,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:41:43,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:41:43,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:41:43,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:41:43,219 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 94 states. [2018-10-03 08:41:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:43,409 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2018-10-03 08:41:43,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:41:43,409 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 198 [2018-10-03 08:41:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:43,410 INFO L225 Difference]: With dead ends: 215 [2018-10-03 08:41:43,410 INFO L226 Difference]: Without dead ends: 201 [2018-10-03 08:41:43,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:41:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-03 08:41:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-03 08:41:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-03 08:41:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-10-03 08:41:43,416 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 198 [2018-10-03 08:41:43,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:43,416 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-10-03 08:41:43,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:41:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-10-03 08:41:43,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-03 08:41:43,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:43,417 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:43,418 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:43,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:43,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1590938268, now seen corresponding path program 91 times [2018-10-03 08:41:43,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:43,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:43,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:43,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:43,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:47,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:47,258 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 [2018-10-03 08:41:47,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:47,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:47,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:47,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-03 08:41:47,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 08:41:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 08:41:47,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:41:47,493 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 95 states. [2018-10-03 08:41:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:47,732 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2018-10-03 08:41:47,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:41:47,732 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 200 [2018-10-03 08:41:47,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:47,733 INFO L225 Difference]: With dead ends: 217 [2018-10-03 08:41:47,733 INFO L226 Difference]: Without dead ends: 203 [2018-10-03 08:41:47,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:41:47,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-03 08:41:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-03 08:41:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-03 08:41:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-10-03 08:41:47,741 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-10-03 08:41:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:47,741 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-10-03 08:41:47,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 08:41:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-10-03 08:41:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-03 08:41:47,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:47,742 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:47,742 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:47,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:47,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1723516000, now seen corresponding path program 92 times [2018-10-03 08:41:47,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:47,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:47,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:47,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:47,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:50,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:50,988 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 [2018-10-03 08:41:50,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:51,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:51,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:51,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:51,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:51,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:41:51,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:41:51,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:41:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:41:51,214 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 96 states. [2018-10-03 08:41:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:51,448 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2018-10-03 08:41:51,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:41:51,448 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 202 [2018-10-03 08:41:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:51,449 INFO L225 Difference]: With dead ends: 219 [2018-10-03 08:41:51,449 INFO L226 Difference]: Without dead ends: 205 [2018-10-03 08:41:51,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:41:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-03 08:41:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-03 08:41:51,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-03 08:41:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-03 08:41:51,457 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2018-10-03 08:41:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:51,458 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-03 08:41:51,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:41:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-03 08:41:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-03 08:41:51,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:51,459 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:51,459 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:51,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash 48333916, now seen corresponding path program 93 times [2018-10-03 08:41:51,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:51,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:51,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:51,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:51,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:55,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:55,041 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 [2018-10-03 08:41:55,047 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:55,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2018-10-03 08:41:55,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:55,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:55,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:55,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-03 08:41:55,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 08:41:55,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 08:41:55,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:41:55,432 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 97 states. [2018-10-03 08:41:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:55,655 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2018-10-03 08:41:55,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:41:55,656 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 204 [2018-10-03 08:41:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:55,657 INFO L225 Difference]: With dead ends: 221 [2018-10-03 08:41:55,657 INFO L226 Difference]: Without dead ends: 207 [2018-10-03 08:41:55,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:41:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-03 08:41:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-03 08:41:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-03 08:41:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2018-10-03 08:41:55,664 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2018-10-03 08:41:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:55,664 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2018-10-03 08:41:55,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 08:41:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2018-10-03 08:41:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-03 08:41:55,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:55,665 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:55,665 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:55,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:55,666 INFO L82 PathProgramCache]: Analyzing trace with hash 811087192, now seen corresponding path program 94 times [2018-10-03 08:41:55,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:55,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:55,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:55,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:55,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:59,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:59,266 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 [2018-10-03 08:41:59,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:59,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:59,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:59,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:41:59,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:59,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:41:59,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:41:59,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:41:59,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:41:59,480 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 98 states. [2018-10-03 08:41:59,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:59,697 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2018-10-03 08:41:59,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:41:59,697 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 206 [2018-10-03 08:41:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:59,698 INFO L225 Difference]: With dead ends: 223 [2018-10-03 08:41:59,698 INFO L226 Difference]: Without dead ends: 209 [2018-10-03 08:41:59,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:41:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-03 08:41:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-03 08:41:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-03 08:41:59,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-10-03 08:41:59,704 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-10-03 08:41:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:59,705 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-10-03 08:41:59,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:41:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-10-03 08:41:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-03 08:41:59,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:59,706 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:41:59,706 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:59,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:59,706 INFO L82 PathProgramCache]: Analyzing trace with hash -622422188, now seen corresponding path program 95 times [2018-10-03 08:41:59,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:59,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:59,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:59,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:59,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:03,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:03,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:03,414 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:03,717 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2018-10-03 08:42:03,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:03,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:03,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:03,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-03 08:42:03,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-03 08:42:03,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-03 08:42:03,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:42:03,784 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 99 states. [2018-10-03 08:42:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:04,127 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-03 08:42:04,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:42:04,127 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 208 [2018-10-03 08:42:04,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:04,129 INFO L225 Difference]: With dead ends: 225 [2018-10-03 08:42:04,129 INFO L226 Difference]: Without dead ends: 211 [2018-10-03 08:42:04,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:42:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-03 08:42:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-03 08:42:04,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-03 08:42:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-03 08:42:04,135 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 208 [2018-10-03 08:42:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:04,135 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-03 08:42:04,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-03 08:42:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-03 08:42:04,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-03 08:42:04,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:04,136 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:04,136 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:04,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash 459565648, now seen corresponding path program 96 times [2018-10-03 08:42:04,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:04,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:04,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:04,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:04,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:07,604 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:07,604 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:07,611 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:07,921 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2018-10-03 08:42:07,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:07,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:07,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:07,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:42:07,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:42:07,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:42:07,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:42:07,988 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 100 states. [2018-10-03 08:42:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:08,256 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2018-10-03 08:42:08,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:42:08,256 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 210 [2018-10-03 08:42:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:08,258 INFO L225 Difference]: With dead ends: 227 [2018-10-03 08:42:08,258 INFO L226 Difference]: Without dead ends: 213 [2018-10-03 08:42:08,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:42:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-03 08:42:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-10-03 08:42:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-03 08:42:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2018-10-03 08:42:08,264 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 210 [2018-10-03 08:42:08,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:08,265 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2018-10-03 08:42:08,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:42:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2018-10-03 08:42:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-03 08:42:08,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:08,266 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:08,266 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:08,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash 867790412, now seen corresponding path program 97 times [2018-10-03 08:42:08,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:08,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:08,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:08,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:08,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:11,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:11,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:11,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:12,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:12,085 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:12,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-03 08:42:12,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 08:42:12,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 08:42:12,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:42:12,087 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 101 states. [2018-10-03 08:42:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:12,382 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-10-03 08:42:12,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 08:42:12,382 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 212 [2018-10-03 08:42:12,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:12,383 INFO L225 Difference]: With dead ends: 229 [2018-10-03 08:42:12,383 INFO L226 Difference]: Without dead ends: 215 [2018-10-03 08:42:12,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:42:12,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-03 08:42:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-03 08:42:12,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-03 08:42:12,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-10-03 08:42:12,393 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 212 [2018-10-03 08:42:12,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:12,393 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-10-03 08:42:12,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 08:42:12,393 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-10-03 08:42:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-03 08:42:12,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:12,394 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:12,395 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:12,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:12,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1965202616, now seen corresponding path program 98 times [2018-10-03 08:42:12,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:12,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:12,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:12,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:12,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:16,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:16,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:16,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:16,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:16,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:16,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:16,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:16,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-03 08:42:16,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:42:16,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:42:16,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:42:16,510 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 102 states. [2018-10-03 08:42:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:16,808 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2018-10-03 08:42:16,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:42:16,808 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 214 [2018-10-03 08:42:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:16,810 INFO L225 Difference]: With dead ends: 231 [2018-10-03 08:42:16,810 INFO L226 Difference]: Without dead ends: 217 [2018-10-03 08:42:16,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:42:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-10-03 08:42:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-10-03 08:42:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-03 08:42:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-10-03 08:42:16,819 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 214 [2018-10-03 08:42:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:16,819 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-10-03 08:42:16,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:42:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-10-03 08:42:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-03 08:42:16,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:16,820 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:16,820 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:16,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:16,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1462236860, now seen corresponding path program 99 times [2018-10-03 08:42:16,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:16,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:16,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:16,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:16,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:20,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:20,782 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 [2018-10-03 08:42:20,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:21,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2018-10-03 08:42:21,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:21,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:21,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:21,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:21,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-03 08:42:21,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-03 08:42:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-03 08:42:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:42:21,214 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 103 states. [2018-10-03 08:42:21,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:21,705 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2018-10-03 08:42:21,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:42:21,705 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 216 [2018-10-03 08:42:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:21,706 INFO L225 Difference]: With dead ends: 233 [2018-10-03 08:42:21,707 INFO L226 Difference]: Without dead ends: 219 [2018-10-03 08:42:21,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:42:21,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-03 08:42:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-03 08:42:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-03 08:42:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2018-10-03 08:42:21,717 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 216 [2018-10-03 08:42:21,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:21,717 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2018-10-03 08:42:21,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-03 08:42:21,717 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2018-10-03 08:42:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-03 08:42:21,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:21,718 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:21,718 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:21,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:21,719 INFO L82 PathProgramCache]: Analyzing trace with hash 851517504, now seen corresponding path program 100 times [2018-10-03 08:42:21,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:21,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:21,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:21,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:21,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:25,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:25,778 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 [2018-10-03 08:42:25,785 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:25,932 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:25,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:25,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:25,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:26,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:26,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-03 08:42:26,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:42:26,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:42:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:42:26,019 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 104 states. [2018-10-03 08:42:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:26,487 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-10-03 08:42:26,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:42:26,488 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 218 [2018-10-03 08:42:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:26,488 INFO L225 Difference]: With dead ends: 235 [2018-10-03 08:42:26,489 INFO L226 Difference]: Without dead ends: 221 [2018-10-03 08:42:26,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:42:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-03 08:42:26,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-03 08:42:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-03 08:42:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-10-03 08:42:26,496 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-10-03 08:42:26,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:26,496 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-10-03 08:42:26,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:42:26,496 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-10-03 08:42:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-03 08:42:26,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:26,497 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:26,497 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:26,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:26,497 INFO L82 PathProgramCache]: Analyzing trace with hash -423598020, now seen corresponding path program 101 times [2018-10-03 08:42:26,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:26,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:26,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:26,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:26,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:30,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:30,715 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 [2018-10-03 08:42:30,724 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:31,070 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2018-10-03 08:42:31,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:31,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:31,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:31,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-03 08:42:31,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-03 08:42:31,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-03 08:42:31,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:42:31,164 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 105 states. [2018-10-03 08:42:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:31,621 INFO L93 Difference]: Finished difference Result 237 states and 241 transitions. [2018-10-03 08:42:31,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-03 08:42:31,622 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 220 [2018-10-03 08:42:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:31,623 INFO L225 Difference]: With dead ends: 237 [2018-10-03 08:42:31,623 INFO L226 Difference]: Without dead ends: 223 [2018-10-03 08:42:31,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:42:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-03 08:42:31,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-03 08:42:31,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-03 08:42:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-10-03 08:42:31,633 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 220 [2018-10-03 08:42:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:31,633 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-10-03 08:42:31,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-03 08:42:31,633 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-10-03 08:42:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-03 08:42:31,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:31,634 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:31,635 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:31,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:31,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1743937224, now seen corresponding path program 102 times [2018-10-03 08:42:31,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:31,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:31,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:31,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:31,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:35,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:35,874 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 [2018-10-03 08:42:35,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:36,226 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 104 check-sat command(s) [2018-10-03 08:42:36,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:36,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:36,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:36,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-03 08:42:36,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:42:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:42:36,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:42:36,298 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 106 states. [2018-10-03 08:42:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:36,768 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2018-10-03 08:42:36,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-03 08:42:36,768 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 222 [2018-10-03 08:42:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:36,769 INFO L225 Difference]: With dead ends: 239 [2018-10-03 08:42:36,769 INFO L226 Difference]: Without dead ends: 225 [2018-10-03 08:42:36,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:42:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-03 08:42:36,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-10-03 08:42:36,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-03 08:42:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-10-03 08:42:36,777 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 222 [2018-10-03 08:42:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:36,777 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-10-03 08:42:36,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:42:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-10-03 08:42:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-03 08:42:36,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:36,778 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:36,778 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:36,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash 720407348, now seen corresponding path program 103 times [2018-10-03 08:42:36,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:36,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:36,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:36,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:36,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:41,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:41,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:41,108 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:41,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:41,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:41,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-03 08:42:41,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 08:42:41,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 08:42:41,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:42:41,356 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 107 states. [2018-10-03 08:42:41,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:41,725 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2018-10-03 08:42:41,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 08:42:41,725 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 224 [2018-10-03 08:42:41,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:41,726 INFO L225 Difference]: With dead ends: 241 [2018-10-03 08:42:41,726 INFO L226 Difference]: Without dead ends: 227 [2018-10-03 08:42:41,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:42:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-03 08:42:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-03 08:42:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-03 08:42:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-10-03 08:42:41,737 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-10-03 08:42:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:41,737 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-10-03 08:42:41,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 08:42:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-10-03 08:42:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-03 08:42:41,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:41,738 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:41,738 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:41,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:41,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1866406352, now seen corresponding path program 104 times [2018-10-03 08:42:41,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:41,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:41,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:41,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:41,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:46,090 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:46,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:46,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:46,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:46,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:46,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:46,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:46,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-03 08:42:46,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:42:46,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:42:46,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:42:46,322 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 108 states. [2018-10-03 08:42:46,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:46,704 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2018-10-03 08:42:46,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-03 08:42:46,704 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 226 [2018-10-03 08:42:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:46,705 INFO L225 Difference]: With dead ends: 243 [2018-10-03 08:42:46,705 INFO L226 Difference]: Without dead ends: 229 [2018-10-03 08:42:46,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:42:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-03 08:42:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-10-03 08:42:46,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-03 08:42:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-10-03 08:42:46,712 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 226 [2018-10-03 08:42:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:46,712 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-10-03 08:42:46,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-03 08:42:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-10-03 08:42:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-03 08:42:46,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:46,713 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:46,713 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:46,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:46,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1008307668, now seen corresponding path program 105 times [2018-10-03 08:42:46,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:46,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:46,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:46,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:46,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:50,991 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:50,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:50,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:51,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 107 check-sat command(s) [2018-10-03 08:42:51,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:51,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:51,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:51,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-03 08:42:51,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-03 08:42:51,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-03 08:42:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:42:51,454 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 109 states. [2018-10-03 08:42:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:51,963 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2018-10-03 08:42:51,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-03 08:42:51,964 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 228 [2018-10-03 08:42:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:51,964 INFO L225 Difference]: With dead ends: 245 [2018-10-03 08:42:51,964 INFO L226 Difference]: Without dead ends: 231 [2018-10-03 08:42:51,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:42:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-03 08:42:51,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-03 08:42:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-03 08:42:51,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-10-03 08:42:51,971 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2018-10-03 08:42:51,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:51,971 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-10-03 08:42:51,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-03 08:42:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-10-03 08:42:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-03 08:42:51,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:51,972 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:51,972 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:51,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1009193176, now seen corresponding path program 106 times [2018-10-03 08:42:51,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:51,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:51,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:51,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:51,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:56,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:56,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:56,542 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:56,688 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:56,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:56,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:42:56,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:56,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-03 08:42:56,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:42:56,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:42:56,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:42:56,762 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 110 states. [2018-10-03 08:42:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:57,111 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-10-03 08:42:57,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-03 08:42:57,112 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 230 [2018-10-03 08:42:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:57,113 INFO L225 Difference]: With dead ends: 247 [2018-10-03 08:42:57,113 INFO L226 Difference]: Without dead ends: 233 [2018-10-03 08:42:57,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:42:57,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-10-03 08:42:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-10-03 08:42:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-03 08:42:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2018-10-03 08:42:57,119 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 230 [2018-10-03 08:42:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:57,119 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2018-10-03 08:42:57,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:42:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2018-10-03 08:42:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-03 08:42:57,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:57,120 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:42:57,120 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:57,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1860166364, now seen corresponding path program 107 times [2018-10-03 08:42:57,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:57,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:57,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:57,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:57,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:01,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11790 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:43:01,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:01,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:01,759 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:02,140 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 109 check-sat command(s) [2018-10-03 08:43:02,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:02,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11790 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-03 08:43:02,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:02,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-03 08:43:02,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-03 08:43:02,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-03 08:43:02,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:43:02,218 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand 111 states. [2018-10-03 08:43:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:02,494 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2018-10-03 08:43:02,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-03 08:43:02,494 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 232 [2018-10-03 08:43:02,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:02,495 INFO L225 Difference]: With dead ends: 249 [2018-10-03 08:43:02,495 INFO L226 Difference]: Without dead ends: 235 [2018-10-03 08:43:02,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:43:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-03 08:43:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-10-03 08:43:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-03 08:43:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-10-03 08:43:02,503 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 232 [2018-10-03 08:43:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:02,504 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-10-03 08:43:02,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-03 08:43:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-10-03 08:43:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-03 08:43:02,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:02,505 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:43:02,505 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:02,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:02,505 INFO L82 PathProgramCache]: Analyzing trace with hash 693353504, now seen corresponding path program 108 times [2018-10-03 08:43:02,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:02,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:02,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:02,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:02,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:43:03,719 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:43:03,724 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:43:03,724 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:43:03 BoogieIcfgContainer [2018-10-03 08:43:03,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:43:03,725 INFO L168 Benchmark]: Toolchain (without parser) took 236997.88 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 353.4 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -247.8 MB). Peak memory consumption was 105.6 MB. Max. memory is 7.1 GB. [2018-10-03 08:43:03,726 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-10-03 08:43:03,726 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.79 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. [2018-10-03 08:43:03,726 INFO L168 Benchmark]: Boogie Preprocessor took 25.73 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. [2018-10-03 08:43:03,727 INFO L168 Benchmark]: RCFGBuilder took 308.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:43:03,727 INFO L168 Benchmark]: TraceAbstraction took 236611.35 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 353.4 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -268.9 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. [2018-10-03 08:43:03,729 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 0.20 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 42.79 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 25.73 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 308.55 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236611.35 ms. Allocated memory was 1.5 GB in the beginning and 1.9 GB in the end (delta: 353.4 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -268.9 MB). Peak memory consumption was 84.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 83). Cancelled while BasicCegarLoop was analyzing trace of length 235 with TraceHistMax 110, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 236.5s OverallTime, 112 OverallIterations, 110 TraceHistogramMax, 25.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 999 SDtfs, 31 SDslu, 22325 SDs, 0 SdLazy, 12647 SolverSat, 195 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19496 GetRequests, 13495 SyntacticMatches, 0 SemanticMatches, 6001 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 179.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=235occurred in iteration=111, 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: 0.6s AutomataMinimizationTime, 111 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 14.9s SatisfiabilityAnalysisTime, 186.0s InterpolantComputationTime, 27011 NumberOfCodeBlocks, 27011 NumberOfCodeBlocksAsserted, 3206 NumberOfCheckSat, 26792 ConstructedInterpolants, 0 QuantifiedInterpolants, 11786318 SizeOfPredicates, 108 NumberOfNonLiveVariables, 65841 ConjunctsInSsa, 6102 ConjunctsInUnsatCore, 219 InterpolantComputations, 3 PerfectInterpolantSequences, 3864/867144 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/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-43-03-737.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-43-03-737.csv Completed graceful shutdown