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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:11:01,386 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:11:01,388 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:11:01,407 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 20:11:01,463 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:11:01,478 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:11:01,479 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:11:01,479 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:11:01,480 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:11:01,480 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:11:01,483 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:11:01,483 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:11:01,483 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:11:01,483 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:11:01,484 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:11:01,484 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:11:01,484 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:11:01,484 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:11:01,484 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:11:01,484 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:11:01,485 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:11:01,485 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:11:01,485 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:11:01,485 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:11:01,487 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:11:01,487 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:11:01,487 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:11:01,487 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:11:01,487 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:11:01,488 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:11:01,488 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:11:01,488 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:11:01,488 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:11:01,488 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:11:01,488 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:11:01,536 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:11:01,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:11:01,554 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:11:01,556 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:11:01,557 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:11:01,558 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-30 20:11:01,558 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-09-30 20:11:01,609 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:11:01,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:11:01,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:11:01,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:11:01,614 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:11:01,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... [2018-09-30 20:11:01,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... [2018-09-30 20:11:01,657 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:11:01,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:11:01,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:11:01,658 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:11:01,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... [2018-09-30 20:11:01,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... [2018-09-30 20:11:01,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... [2018-09-30 20:11:01,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... [2018-09-30 20:11:01,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... [2018-09-30 20:11:01,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... [2018-09-30 20:11:01,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... [2018-09-30 20:11:01,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:11:01,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:11:01,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:11:01,683 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:11:01,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:11:01,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 20:11:01,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:11:01,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:11:02,029 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:11:02,030 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:11:02 BoogieIcfgContainer [2018-09-30 20:11:02,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:11:02,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:11:02,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:11:02,035 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:11:02,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:11:01" (1/2) ... [2018-09-30 20:11:02,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c9478b and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:11:02, skipping insertion in model container [2018-09-30 20:11:02,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:11:02" (2/2) ... [2018-09-30 20:11:02,038 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-30 20:11:02,048 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:11:02,056 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:11:02,107 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:11:02,108 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:11:02,108 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:11:02,108 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:11:02,109 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:11:02,109 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:11:02,109 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:11:02,109 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:11:02,109 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:11:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-30 20:11:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:11:02,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:02,132 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:11:02,133 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:02,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-30 20:11:02,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:02,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:02,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:02,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:02,303 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:11:02,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:11:02,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:11:02,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:11:02,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:11:02,323 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-30 20:11:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:02,381 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-09-30 20:11:02,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:11:02,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:11:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:02,395 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:11:02,395 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:11:02,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:11:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:11:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-30 20:11:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:11:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-30 20:11:02,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-30 20:11:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:02,458 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-30 20:11:02,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:11:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-30 20:11:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:11:02,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:02,459 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-30 20:11:02,460 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:02,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-09-30 20:11:02,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:02,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:02,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:02,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:02,532 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:11:02,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:11:02,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:11:02,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:11:02,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:11:02,535 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-09-30 20:11:02,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:02,568 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-30 20:11:02,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:11:02,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-30 20:11:02,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:02,569 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:11:02,569 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:11:02,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:11:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:11:02,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:11:02,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:11:02,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-30 20:11:02,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-30 20:11:02,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:02,574 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-30 20:11:02,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:11:02,574 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-30 20:11:02,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:11:02,575 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:02,575 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-30 20:11:02,575 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:02,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:02,575 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-09-30 20:11:02,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:02,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:02,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:02,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:02,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:02,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:02,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:02,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:02,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:02,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:11:02,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:11:02,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:11:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:11:02,739 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-30 20:11:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:02,787 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-09-30 20:11:02,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:11:02,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:11:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:02,788 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:11:02,789 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:11:02,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:11:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:11:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:11:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:11:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-30 20:11:02,792 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-30 20:11:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:02,793 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-30 20:11:02,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:11:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-30 20:11:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:11:02,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:02,794 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-30 20:11:02,794 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:02,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:02,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-09-30 20:11:02,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:02,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:02,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:02,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-30 20:11:02,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:02,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:02,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:02,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:02,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:02,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:03,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:03,024 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-09-30 20:11:03,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:11:03,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:11:03,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:11:03,026 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-09-30 20:11:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:03,514 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-09-30 20:11:03,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:11:03,515 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 20:11:03,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:03,516 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:11:03,516 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:11:03,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:11:03,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:11:03,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-30 20:11:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:11:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-30 20:11:03,522 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-09-30 20:11:03,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:03,522 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-30 20:11:03,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:11:03,523 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-30 20:11:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:11:03,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:03,524 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-09-30 20:11:03,524 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:03,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:03,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-09-30 20:11:03,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:03,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:03,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:03,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:03,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-30 20:11:03,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:03,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:03,631 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:03,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:11:03,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:03,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-30 20:11:03,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:03,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:11:03,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:11:03,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:11:03,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:11:03,713 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-30 20:11:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:03,839 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-30 20:11:03,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:11:03,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-09-30 20:11:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:03,842 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:11:03,842 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:11:03,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:11:03,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:11:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:11:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:11:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 20:11:03,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-30 20:11:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:03,851 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 20:11:03,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:11:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 20:11:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:11:03,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:03,854 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-09-30 20:11:03,854 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:03,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-09-30 20:11:03,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:03,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:03,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:03,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:03,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-30 20:11:03,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:03,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:03,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:03,985 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:03,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:03,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-30 20:11:04,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:04,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-09-30 20:11:04,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:11:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:11:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:11:04,109 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-09-30 20:11:04,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:04,875 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-09-30 20:11:04,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:11:04,878 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-09-30 20:11:04,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:04,879 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:11:04,879 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:11:04,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:11:04,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:11:04,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-09-30 20:11:04,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:11:04,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-09-30 20:11:04,887 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-09-30 20:11:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:04,887 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-09-30 20:11:04,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:11:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-09-30 20:11:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:11:04,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:04,889 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-09-30 20:11:04,889 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:04,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:04,889 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-09-30 20:11:04,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:04,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:04,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:04,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:04,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-30 20:11:04,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:04,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:04,995 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:05,012 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:11:05,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:05,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-09-30 20:11:05,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:05,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-09-30 20:11:05,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:11:05,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:11:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:11:05,162 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-09-30 20:11:05,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:05,916 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-09-30 20:11:05,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:11:05,917 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-09-30 20:11:05,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:05,918 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:11:05,918 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:11:05,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:11:05,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:11:05,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-09-30 20:11:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:11:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-09-30 20:11:05,928 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-09-30 20:11:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:05,928 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-09-30 20:11:05,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:11:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-09-30 20:11:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:11:05,930 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:05,930 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-09-30 20:11:05,930 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:05,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:05,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-09-30 20:11:05,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:05,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:05,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:05,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:05,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:06,062 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-09-30 20:11:06,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:06,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:06,077 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:06,129 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:11:06,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:06,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-09-30 20:11:06,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:06,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:11:06,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:11:06,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:11:06,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:11:06,167 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-09-30 20:11:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:06,207 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-09-30 20:11:06,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:11:06,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-09-30 20:11:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:06,210 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:11:06,210 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:11:06,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:11:06,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:11:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:11:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:11:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-09-30 20:11:06,220 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-09-30 20:11:06,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:06,220 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-09-30 20:11:06,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:11:06,220 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-09-30 20:11:06,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:11:06,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:06,222 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-09-30 20:11:06,222 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:06,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:06,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-09-30 20:11:06,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:06,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:06,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:06,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:06,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-09-30 20:11:06,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:06,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:06,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:06,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-09-30 20:11:06,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:06,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-09-30 20:11:06,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:11:06,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:11:06,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:11:06,584 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-09-30 20:11:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:08,196 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-09-30 20:11:08,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:11:08,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-09-30 20:11:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:08,197 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:11:08,198 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:11:08,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:11:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:11:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-09-30 20:11:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:11:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-09-30 20:11:08,212 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-09-30 20:11:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:08,212 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-09-30 20:11:08,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:11:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-09-30 20:11:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:11:08,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:08,214 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-09-30 20:11:08,214 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:08,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-09-30 20:11:08,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:08,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:08,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:08,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:08,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-30 20:11:08,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:08,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:08,408 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:08,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:08,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:08,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-09-30 20:11:08,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:08,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-09-30 20:11:08,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:11:08,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:11:08,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:11:08,660 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-09-30 20:11:10,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:10,041 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-09-30 20:11:10,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:11:10,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-09-30 20:11:10,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:10,042 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:11:10,043 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:11:10,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:11:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:11:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-09-30 20:11:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:11:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-09-30 20:11:10,061 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-09-30 20:11:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:10,061 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-09-30 20:11:10,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:11:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-09-30 20:11:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:11:10,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:10,063 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-09-30 20:11:10,064 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:10,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:10,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-09-30 20:11:10,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:10,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:10,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:10,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:10,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-09-30 20:11:10,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:10,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:10,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:10,532 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:11:10,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:10,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-09-30 20:11:10,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:10,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-09-30 20:11:10,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:11:10,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:11:10,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:11:10,727 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-09-30 20:11:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:14,028 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-09-30 20:11:14,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:11:14,028 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-09-30 20:11:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:14,029 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:11:14,029 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:11:14,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:11:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:11:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-09-30 20:11:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:11:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-09-30 20:11:14,056 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-09-30 20:11:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:14,057 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-09-30 20:11:14,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:11:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-09-30 20:11:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:11:14,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:14,061 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-09-30 20:11:14,062 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:14,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-09-30 20:11:14,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:14,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:14,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:14,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:14,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-30 20:11:14,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:14,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:14,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:14,434 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:14,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:14,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-30 20:11:14,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:14,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:11:14,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:11:14,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:11:14,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:11:14,518 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-09-30 20:11:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:14,723 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-09-30 20:11:14,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:11:14,725 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-09-30 20:11:14,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:14,726 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:11:14,726 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:11:14,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:11:14,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:11:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-09-30 20:11:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:11:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-09-30 20:11:14,748 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-09-30 20:11:14,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:14,749 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-09-30 20:11:14,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:11:14,749 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-09-30 20:11:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:11:14,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:14,751 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-09-30 20:11:14,751 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:14,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:14,752 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-09-30 20:11:14,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:14,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:14,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:14,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:14,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:14,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-30 20:11:14,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:14,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:14,941 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:15,024 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 20:11:15,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:15,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-30 20:11:15,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:15,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:11:15,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:11:15,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:11:15,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:11:15,074 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-09-30 20:11:15,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:15,171 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-09-30 20:11:15,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:11:15,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-09-30 20:11:15,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:15,173 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:11:15,173 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:11:15,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:11:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:11:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-09-30 20:11:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:11:15,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-09-30 20:11:15,196 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-09-30 20:11:15,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:15,196 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-09-30 20:11:15,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:11:15,197 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-09-30 20:11:15,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:11:15,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:15,199 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-09-30 20:11:15,199 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:15,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:15,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-09-30 20:11:15,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:15,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:15,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:15,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:15,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-30 20:11:15,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:15,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:15,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:15,661 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-09-30 20:11:15,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:15,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-30 20:11:15,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:15,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:11:15,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:11:15,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:11:15,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:11:15,716 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-09-30 20:11:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:15,887 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-09-30 20:11:15,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:11:15,888 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-09-30 20:11:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:15,889 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:11:15,889 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 20:11:15,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:11:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 20:11:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-09-30 20:11:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 20:11:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-09-30 20:11:15,913 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-09-30 20:11:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:15,913 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-09-30 20:11:15,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:11:15,913 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-09-30 20:11:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 20:11:15,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:15,915 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-09-30 20:11:15,915 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:15,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:15,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-09-30 20:11:15,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:15,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:15,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:15,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:15,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-30 20:11:16,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:16,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:16,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:16,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-30 20:11:16,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:16,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:11:16,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:11:16,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:11:16,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:11:16,561 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-09-30 20:11:16,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:16,644 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-09-30 20:11:16,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:11:16,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-09-30 20:11:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:16,646 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:11:16,646 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:11:16,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:11:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:11:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-09-30 20:11:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:11:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-09-30 20:11:16,673 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-09-30 20:11:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:16,673 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-09-30 20:11:16,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:11:16,674 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-09-30 20:11:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 20:11:16,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:16,676 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-09-30 20:11:16,676 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:16,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-09-30 20:11:16,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:16,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:16,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:16,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:16,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:16,891 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-30 20:11:16,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:16,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:16,900 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:16,987 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:16,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:16,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-30 20:11:17,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:17,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:11:17,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:11:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:11:17,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:11:17,053 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-09-30 20:11:17,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:17,177 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-09-30 20:11:17,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:11:17,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-09-30 20:11:17,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:17,179 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:11:17,179 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 20:11:17,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:11:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 20:11:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-09-30 20:11:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 20:11:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-09-30 20:11:17,201 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-09-30 20:11:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:17,202 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-09-30 20:11:17,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:11:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-09-30 20:11:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 20:11:17,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:17,204 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-09-30 20:11:17,204 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:17,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:17,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-09-30 20:11:17,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:17,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:17,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:17,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:17,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-30 20:11:17,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:17,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:17,581 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:17,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-09-30 20:11:17,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:17,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-30 20:11:17,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:17,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:11:17,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:11:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:11:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:11:17,782 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-09-30 20:11:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:17,927 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-09-30 20:11:17,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:11:17,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-09-30 20:11:17,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:17,929 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:11:17,929 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:11:17,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:11:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:11:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-09-30 20:11:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 20:11:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-09-30 20:11:17,965 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-09-30 20:11:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:17,966 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-09-30 20:11:17,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:11:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-09-30 20:11:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 20:11:17,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:17,968 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-09-30 20:11:17,968 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:17,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:17,969 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-09-30 20:11:17,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:17,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:17,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:17,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:17,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-30 20:11:18,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:18,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:18,314 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:18,424 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:18,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:18,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-30 20:11:18,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:18,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:11:18,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:11:18,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:11:18,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:11:18,483 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-09-30 20:11:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:18,600 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-09-30 20:11:18,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:11:18,600 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-09-30 20:11:18,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:18,601 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:11:18,602 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 20:11:18,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:11:18,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 20:11:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-09-30 20:11:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 20:11:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-09-30 20:11:18,637 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-09-30 20:11:18,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:18,638 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-09-30 20:11:18,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:11:18,638 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-09-30 20:11:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-30 20:11:18,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:18,640 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-09-30 20:11:18,640 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:18,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:18,641 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-09-30 20:11:18,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:18,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:18,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:18,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:18,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-30 20:11:18,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:18,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:18,964 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:19,196 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 20:11:19,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:19,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-30 20:11:19,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:19,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:11:19,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:11:19,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:11:19,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:11:19,268 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-09-30 20:11:19,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:19,425 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-09-30 20:11:19,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:11:19,425 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-09-30 20:11:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:19,426 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:11:19,426 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 20:11:19,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:11:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 20:11:19,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-09-30 20:11:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-30 20:11:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-09-30 20:11:19,455 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-09-30 20:11:19,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:19,455 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-09-30 20:11:19,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:11:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-09-30 20:11:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-30 20:11:19,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:19,457 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-09-30 20:11:19,457 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:19,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:19,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-09-30 20:11:19,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:19,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:19,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:19,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:19,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-30 20:11:20,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:20,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:20,454 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:20,824 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-30 20:11:20,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:20,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-30 20:11:20,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:20,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:11:20,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:11:20,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:11:20,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:11:20,887 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-09-30 20:11:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:21,032 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-09-30 20:11:21,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:11:21,034 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-09-30 20:11:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:21,035 INFO L225 Difference]: With dead ends: 209 [2018-09-30 20:11:21,035 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 20:11:21,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:11:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 20:11:21,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-09-30 20:11:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 20:11:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-09-30 20:11:21,076 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-09-30 20:11:21,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:21,076 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-09-30 20:11:21,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:11:21,076 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-09-30 20:11:21,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-30 20:11:21,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:21,078 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-09-30 20:11:21,078 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:21,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-09-30 20:11:21,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:21,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:21,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:21,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:21,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-30 20:11:21,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:21,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:21,895 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:22,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-30 20:11:22,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:22,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:11:22,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:11:22,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:11:22,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:11:22,068 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-09-30 20:11:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:22,209 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-09-30 20:11:22,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:11:22,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-09-30 20:11:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:22,211 INFO L225 Difference]: With dead ends: 221 [2018-09-30 20:11:22,211 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 20:11:22,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:11:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 20:11:22,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-09-30 20:11:22,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-30 20:11:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-09-30 20:11:22,261 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-09-30 20:11:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:22,262 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-09-30 20:11:22,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:11:22,262 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-09-30 20:11:22,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-30 20:11:22,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:22,263 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-09-30 20:11:22,263 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:22,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:22,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-09-30 20:11:22,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:22,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:22,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:22,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:22,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-30 20:11:23,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:23,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:23,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:23,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:23,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:23,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-30 20:11:23,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:23,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:11:23,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:11:23,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:11:23,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:11:23,322 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-09-30 20:11:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:23,473 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-09-30 20:11:23,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:11:23,474 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-09-30 20:11:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:23,476 INFO L225 Difference]: With dead ends: 233 [2018-09-30 20:11:23,476 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 20:11:23,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:11:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 20:11:23,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-09-30 20:11:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-30 20:11:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-09-30 20:11:23,525 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-09-30 20:11:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:23,526 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-09-30 20:11:23,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:11:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-09-30 20:11:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-30 20:11:23,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:23,527 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-09-30 20:11:23,527 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:23,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-09-30 20:11:23,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:23,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:23,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:23,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:23,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 20:11:24,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:24,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:24,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:24,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-09-30 20:11:24,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:24,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-30 20:11:24,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:24,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:11:24,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:11:24,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:11:24,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:11:24,637 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-09-30 20:11:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:24,805 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-09-30 20:11:24,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:11:24,805 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-09-30 20:11:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:24,807 INFO L225 Difference]: With dead ends: 245 [2018-09-30 20:11:24,807 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 20:11:24,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:11:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 20:11:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-09-30 20:11:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-09-30 20:11:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-09-30 20:11:24,856 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-09-30 20:11:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:24,857 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-09-30 20:11:24,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:11:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-09-30 20:11:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-09-30 20:11:24,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:24,859 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-09-30 20:11:24,859 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:24,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-09-30 20:11:24,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:24,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:24,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:24,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:24,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-30 20:11:26,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:26,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:26,533 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:26,659 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:26,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:26,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-30 20:11:26,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:26,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:11:26,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:11:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:11:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:11:26,729 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-09-30 20:11:26,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:26,881 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-09-30 20:11:26,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:11:26,888 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-09-30 20:11:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:26,889 INFO L225 Difference]: With dead ends: 257 [2018-09-30 20:11:26,889 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 20:11:26,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:11:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 20:11:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-09-30 20:11:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-30 20:11:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-09-30 20:11:26,965 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-09-30 20:11:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:26,966 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-09-30 20:11:26,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:11:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-09-30 20:11:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-30 20:11:26,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:26,967 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-09-30 20:11:26,968 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:26,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:26,968 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-09-30 20:11:26,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:26,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:26,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:26,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:26,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-30 20:11:27,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:27,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:27,514 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:27,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-09-30 20:11:27,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:27,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-30 20:11:27,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:27,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:11:27,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:11:27,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:11:27,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:11:27,958 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-09-30 20:11:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:28,121 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-09-30 20:11:28,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:11:28,121 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-09-30 20:11:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:28,123 INFO L225 Difference]: With dead ends: 269 [2018-09-30 20:11:28,123 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 20:11:28,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:11:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 20:11:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-09-30 20:11:28,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-30 20:11:28,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-09-30 20:11:28,182 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-09-30 20:11:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:28,183 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-09-30 20:11:28,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:11:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-09-30 20:11:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-30 20:11:28,184 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:28,184 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-09-30 20:11:28,184 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:28,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:28,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-09-30 20:11:28,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:28,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:28,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:28,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:28,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-30 20:11:28,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:28,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:28,645 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:28,978 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-09-30 20:11:28,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:28,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-30 20:11:29,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:29,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:11:29,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:11:29,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:11:29,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:11:29,071 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-09-30 20:11:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:29,641 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-09-30 20:11:29,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:11:29,641 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-09-30 20:11:29,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:29,643 INFO L225 Difference]: With dead ends: 281 [2018-09-30 20:11:29,643 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 20:11:29,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:11:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 20:11:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-09-30 20:11:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-30 20:11:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-09-30 20:11:29,713 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-09-30 20:11:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:29,714 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-09-30 20:11:29,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:11:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-09-30 20:11:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-30 20:11:29,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:29,716 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-09-30 20:11:29,716 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:29,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:29,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-09-30 20:11:29,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:29,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:29,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:29,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:29,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-30 20:11:31,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:31,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:31,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:31,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-30 20:11:31,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:31,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:11:31,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:11:31,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:11:31,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:11:31,556 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-09-30 20:11:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:32,592 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-09-30 20:11:32,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:11:32,592 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-09-30 20:11:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:32,594 INFO L225 Difference]: With dead ends: 293 [2018-09-30 20:11:32,594 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 20:11:32,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:11:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 20:11:32,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-09-30 20:11:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-09-30 20:11:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-09-30 20:11:32,696 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-09-30 20:11:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:32,697 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-09-30 20:11:32,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:11:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-09-30 20:11:32,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-09-30 20:11:32,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:32,700 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-09-30 20:11:32,700 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:32,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:32,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-09-30 20:11:32,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:32,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:32,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:32,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:32,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:32,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-30 20:11:33,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:33,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:33,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:33,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:33,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:33,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-30 20:11:33,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:33,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:11:33,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:11:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:11:33,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:11:33,481 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-09-30 20:11:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:33,665 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-09-30 20:11:33,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:11:33,671 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-09-30 20:11:33,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:33,673 INFO L225 Difference]: With dead ends: 305 [2018-09-30 20:11:33,673 INFO L226 Difference]: Without dead ends: 303 [2018-09-30 20:11:33,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:11:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-30 20:11:33,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-09-30 20:11:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-09-30 20:11:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-09-30 20:11:33,774 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-09-30 20:11:33,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:33,774 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-09-30 20:11:33,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:11:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-09-30 20:11:33,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-09-30 20:11:33,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:33,776 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-09-30 20:11:33,776 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:33,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:33,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-09-30 20:11:33,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:33,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:33,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:33,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:33,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 20:11:34,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:34,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:34,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:34,887 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-09-30 20:11:34,887 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:34,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-30 20:11:35,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:35,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:11:35,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:11:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:11:35,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:11:35,021 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-09-30 20:11:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:35,311 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-09-30 20:11:35,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:11:35,312 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-09-30 20:11:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:35,314 INFO L225 Difference]: With dead ends: 317 [2018-09-30 20:11:35,314 INFO L226 Difference]: Without dead ends: 315 [2018-09-30 20:11:35,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:11:35,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-30 20:11:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-09-30 20:11:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-09-30 20:11:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-09-30 20:11:35,461 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-09-30 20:11:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:35,461 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-09-30 20:11:35,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:11:35,461 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-09-30 20:11:35,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-30 20:11:35,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:35,463 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-09-30 20:11:35,463 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:35,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-09-30 20:11:35,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:35,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:35,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:35,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:35,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-30 20:11:36,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:36,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:36,510 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:36,665 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:36,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:36,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-30 20:11:36,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:36,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:11:36,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:11:36,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:11:36,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:11:36,786 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-09-30 20:11:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:37,023 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-09-30 20:11:37,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:11:37,023 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-09-30 20:11:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:37,025 INFO L225 Difference]: With dead ends: 329 [2018-09-30 20:11:37,025 INFO L226 Difference]: Without dead ends: 327 [2018-09-30 20:11:37,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:11:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-30 20:11:37,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-09-30 20:11:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-09-30 20:11:37,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-09-30 20:11:37,127 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-09-30 20:11:37,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:37,128 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-09-30 20:11:37,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:11:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-09-30 20:11:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-30 20:11:37,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:37,130 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-09-30 20:11:37,130 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:37,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:37,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-09-30 20:11:37,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:37,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:37,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:37,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:37,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 20:11:38,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:38,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:38,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:38,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-09-30 20:11:38,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:38,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-30 20:11:38,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:38,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:11:38,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:11:38,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:11:38,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:11:38,779 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-09-30 20:11:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:39,060 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-09-30 20:11:39,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:11:39,060 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-09-30 20:11:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:39,062 INFO L225 Difference]: With dead ends: 341 [2018-09-30 20:11:39,063 INFO L226 Difference]: Without dead ends: 339 [2018-09-30 20:11:39,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:11:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-30 20:11:39,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-09-30 20:11:39,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-30 20:11:39,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-09-30 20:11:39,170 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-09-30 20:11:39,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:39,170 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-09-30 20:11:39,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:11:39,170 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-09-30 20:11:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-30 20:11:39,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:39,172 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-09-30 20:11:39,172 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:39,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-09-30 20:11:39,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:39,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:39,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:39,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:39,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-30 20:11:40,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:40,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:40,554 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:41,185 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-09-30 20:11:41,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:41,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-30 20:11:41,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:41,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:11:41,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:11:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:11:41,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:11:41,314 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-09-30 20:11:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:41,589 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-09-30 20:11:41,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:11:41,590 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-09-30 20:11:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:41,591 INFO L225 Difference]: With dead ends: 353 [2018-09-30 20:11:41,591 INFO L226 Difference]: Without dead ends: 351 [2018-09-30 20:11:41,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:11:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-30 20:11:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-09-30 20:11:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-09-30 20:11:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-09-30 20:11:41,737 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-09-30 20:11:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:41,738 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-09-30 20:11:41,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:11:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-09-30 20:11:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-30 20:11:41,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:41,740 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-09-30 20:11:41,741 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:41,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:41,741 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-09-30 20:11:41,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:41,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:41,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:41,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:41,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-30 20:11:42,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:42,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:42,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:42,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-30 20:11:43,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:43,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:11:43,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:11:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:11:43,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:11:43,013 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-09-30 20:11:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:44,351 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-09-30 20:11:44,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:11:44,352 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-09-30 20:11:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:44,353 INFO L225 Difference]: With dead ends: 365 [2018-09-30 20:11:44,354 INFO L226 Difference]: Without dead ends: 363 [2018-09-30 20:11:44,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:11:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-30 20:11:44,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-09-30 20:11:44,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-09-30 20:11:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-09-30 20:11:44,467 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-09-30 20:11:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:44,467 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-09-30 20:11:44,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:11:44,467 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-09-30 20:11:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-09-30 20:11:44,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:44,469 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-09-30 20:11:44,469 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:44,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-09-30 20:11:44,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:44,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:44,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:44,471 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:44,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-30 20:11:45,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:45,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:45,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:45,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:45,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:45,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-30 20:11:45,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:45,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:11:45,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:11:45,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:11:45,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:11:45,889 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-09-30 20:11:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:46,334 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-09-30 20:11:46,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:11:46,335 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-09-30 20:11:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:46,336 INFO L225 Difference]: With dead ends: 377 [2018-09-30 20:11:46,336 INFO L226 Difference]: Without dead ends: 375 [2018-09-30 20:11:46,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:11:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-30 20:11:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-09-30 20:11:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-09-30 20:11:46,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-09-30 20:11:46,479 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-09-30 20:11:46,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:46,480 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-09-30 20:11:46,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:11:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-09-30 20:11:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-30 20:11:46,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:46,482 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-09-30 20:11:46,482 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:46,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:46,483 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-09-30 20:11:46,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:46,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:46,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:46,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:46,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-30 20:11:47,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:47,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:47,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:47,739 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-09-30 20:11:47,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:47,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-30 20:11:47,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:47,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:11:47,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:11:47,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:11:47,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:11:47,971 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-09-30 20:11:48,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:48,250 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-09-30 20:11:48,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:11:48,250 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-09-30 20:11:48,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:48,252 INFO L225 Difference]: With dead ends: 389 [2018-09-30 20:11:48,252 INFO L226 Difference]: Without dead ends: 387 [2018-09-30 20:11:48,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:11:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-30 20:11:48,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-09-30 20:11:48,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-09-30 20:11:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-09-30 20:11:48,374 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-09-30 20:11:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:48,374 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-09-30 20:11:48,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:11:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-09-30 20:11:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-09-30 20:11:48,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:48,376 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-09-30 20:11:48,376 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:48,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:48,377 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-09-30 20:11:48,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:48,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:48,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:48,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:48,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-30 20:11:49,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:49,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:49,139 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:49,340 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:49,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:49,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-30 20:11:49,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:49,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:11:49,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:11:49,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:11:49,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:11:49,480 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-09-30 20:11:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:49,796 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-09-30 20:11:49,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:11:49,797 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-09-30 20:11:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:49,799 INFO L225 Difference]: With dead ends: 401 [2018-09-30 20:11:49,799 INFO L226 Difference]: Without dead ends: 399 [2018-09-30 20:11:49,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:11:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-30 20:11:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-09-30 20:11:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-30 20:11:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-09-30 20:11:49,944 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-09-30 20:11:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:49,945 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-09-30 20:11:49,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:11:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-09-30 20:11:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-30 20:11:49,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:49,947 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-09-30 20:11:49,948 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:49,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:49,948 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-09-30 20:11:49,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:49,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:49,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:49,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:49,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-30 20:11:50,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:50,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:50,857 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:51,483 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-09-30 20:11:51,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:51,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-30 20:11:51,621 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:51,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:11:51,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:11:51,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:11:51,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:11:51,622 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-09-30 20:11:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:51,919 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-09-30 20:11:51,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:11:51,919 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-09-30 20:11:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:51,921 INFO L225 Difference]: With dead ends: 413 [2018-09-30 20:11:51,921 INFO L226 Difference]: Without dead ends: 411 [2018-09-30 20:11:51,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:11:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-30 20:11:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-09-30 20:11:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-09-30 20:11:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-09-30 20:11:52,074 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-09-30 20:11:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:52,074 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-09-30 20:11:52,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:11:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-09-30 20:11:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-09-30 20:11:52,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:52,077 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-09-30 20:11:52,078 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:52,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:52,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-09-30 20:11:52,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:52,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:52,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:52,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:52,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-30 20:11:52,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:52,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:52,802 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:53,457 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-09-30 20:11:53,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:53,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-30 20:11:53,630 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:53,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:11:53,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:11:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:11:53,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:11:53,632 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-09-30 20:11:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:54,025 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-09-30 20:11:54,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:11:54,027 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-09-30 20:11:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:54,029 INFO L225 Difference]: With dead ends: 425 [2018-09-30 20:11:54,029 INFO L226 Difference]: Without dead ends: 423 [2018-09-30 20:11:54,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:11:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-30 20:11:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-09-30 20:11:54,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-09-30 20:11:54,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-09-30 20:11:54,184 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-09-30 20:11:54,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:54,185 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-09-30 20:11:54,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:11:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-09-30 20:11:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-09-30 20:11:54,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:54,187 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-09-30 20:11:54,188 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:54,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-09-30 20:11:54,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:54,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:54,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:54,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:54,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-30 20:11:55,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:55,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:55,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:55,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-30 20:11:55,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:55,515 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:11:55,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:11:55,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:11:55,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:11:55,516 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-09-30 20:11:55,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:55,892 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-09-30 20:11:55,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:11:55,892 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-09-30 20:11:55,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:55,894 INFO L225 Difference]: With dead ends: 437 [2018-09-30 20:11:55,894 INFO L226 Difference]: Without dead ends: 435 [2018-09-30 20:11:55,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:11:55,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-30 20:11:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-09-30 20:11:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-09-30 20:11:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-09-30 20:11:56,063 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-09-30 20:11:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:56,064 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-09-30 20:11:56,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:11:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-09-30 20:11:56,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-09-30 20:11:56,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:56,067 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-09-30 20:11:56,067 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:56,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:56,067 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-09-30 20:11:56,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:56,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:56,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:56,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-30 20:11:57,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:57,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:57,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:57,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:57,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:57,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-30 20:11:57,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:57,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:11:57,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:11:57,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:11:57,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:11:57,995 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-09-30 20:11:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:59,028 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-09-30 20:11:59,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:11:59,028 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-09-30 20:11:59,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:59,030 INFO L225 Difference]: With dead ends: 449 [2018-09-30 20:11:59,030 INFO L226 Difference]: Without dead ends: 447 [2018-09-30 20:11:59,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:11:59,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-09-30 20:11:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-09-30 20:11:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-09-30 20:11:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-09-30 20:11:59,195 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-09-30 20:11:59,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:59,195 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-09-30 20:11:59,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:11:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-09-30 20:11:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-09-30 20:11:59,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:59,198 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-09-30 20:11:59,198 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:59,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:59,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-09-30 20:11:59,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:59,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:59,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:59,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:59,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-30 20:12:00,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:00,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:00,124 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:00,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-09-30 20:12:00,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:00,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-30 20:12:01,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:01,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:12:01,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:12:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:12:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:12:01,148 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-09-30 20:12:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:01,537 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-09-30 20:12:01,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:12:01,537 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-09-30 20:12:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:01,538 INFO L225 Difference]: With dead ends: 461 [2018-09-30 20:12:01,539 INFO L226 Difference]: Without dead ends: 459 [2018-09-30 20:12:01,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:12:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-09-30 20:12:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-09-30 20:12:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-09-30 20:12:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-09-30 20:12:01,696 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-09-30 20:12:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:01,696 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-09-30 20:12:01,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:12:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-09-30 20:12:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-09-30 20:12:01,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:01,698 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-09-30 20:12:01,699 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:01,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:01,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-09-30 20:12:01,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:01,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:01,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:01,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:01,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-30 20:12:02,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:02,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:03,003 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:03,248 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:03,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:03,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-30 20:12:03,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:03,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:12:03,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:12:03,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:12:03,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:12:03,432 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-09-30 20:12:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:03,867 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-09-30 20:12:03,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:12:03,873 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-09-30 20:12:03,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:03,875 INFO L225 Difference]: With dead ends: 473 [2018-09-30 20:12:03,875 INFO L226 Difference]: Without dead ends: 471 [2018-09-30 20:12:03,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:12:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-09-30 20:12:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-09-30 20:12:04,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-09-30 20:12:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-09-30 20:12:04,055 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-09-30 20:12:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:04,055 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-09-30 20:12:04,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:12:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-09-30 20:12:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-09-30 20:12:04,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:04,058 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-09-30 20:12:04,058 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:04,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:04,059 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-09-30 20:12:04,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:04,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:04,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:04,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:04,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-30 20:12:05,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:05,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:05,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:05,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-09-30 20:12:05,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:05,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-30 20:12:06,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:06,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:12:06,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:12:06,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:12:06,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:12:06,059 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-09-30 20:12:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:06,658 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-09-30 20:12:06,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:12:06,658 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-09-30 20:12:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:06,660 INFO L225 Difference]: With dead ends: 485 [2018-09-30 20:12:06,660 INFO L226 Difference]: Without dead ends: 483 [2018-09-30 20:12:06,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:12:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-09-30 20:12:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-09-30 20:12:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-09-30 20:12:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-09-30 20:12:06,857 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-09-30 20:12:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:06,858 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-09-30 20:12:06,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:12:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-09-30 20:12:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-09-30 20:12:06,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:06,860 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-09-30 20:12:06,860 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:06,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:06,861 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-09-30 20:12:06,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:06,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:06,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:06,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:06,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-30 20:12:08,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:08,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:08,010 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:08,872 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-09-30 20:12:08,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:08,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-30 20:12:09,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:09,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:12:09,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:12:09,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:12:09,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:12:09,144 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-09-30 20:12:09,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:09,536 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-09-30 20:12:09,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:12:09,537 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-09-30 20:12:09,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:09,538 INFO L225 Difference]: With dead ends: 497 [2018-09-30 20:12:09,538 INFO L226 Difference]: Without dead ends: 495 [2018-09-30 20:12:09,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:12:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-09-30 20:12:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-09-30 20:12:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-09-30 20:12:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-09-30 20:12:09,752 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-09-30 20:12:09,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:09,753 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-09-30 20:12:09,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:12:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-09-30 20:12:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-09-30 20:12:09,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:09,755 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-09-30 20:12:09,756 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:09,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:09,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-09-30 20:12:09,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:09,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:09,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:09,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:09,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-30 20:12:11,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:11,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:11,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:11,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-30 20:12:11,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:11,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:12:11,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:12:11,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:12:11,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:12:11,600 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-09-30 20:12:12,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:12,030 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-09-30 20:12:12,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:12:12,031 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-09-30 20:12:12,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:12,032 INFO L225 Difference]: With dead ends: 509 [2018-09-30 20:12:12,032 INFO L226 Difference]: Without dead ends: 507 [2018-09-30 20:12:12,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:12:12,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-09-30 20:12:12,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-09-30 20:12:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-09-30 20:12:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-09-30 20:12:12,266 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-09-30 20:12:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:12,266 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-09-30 20:12:12,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:12:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-09-30 20:12:12,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-09-30 20:12:12,268 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:12,268 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-09-30 20:12:12,268 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:12,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:12,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-09-30 20:12:12,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:12,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:12,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:12,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:12,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-30 20:12:13,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:13,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:13,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:13,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:13,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:13,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-30 20:12:13,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:13,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:12:13,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:12:13,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:12:13,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:12:13,711 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-09-30 20:12:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:14,186 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-09-30 20:12:14,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:12:14,187 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-09-30 20:12:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:14,188 INFO L225 Difference]: With dead ends: 521 [2018-09-30 20:12:14,188 INFO L226 Difference]: Without dead ends: 519 [2018-09-30 20:12:14,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:12:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-09-30 20:12:14,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-09-30 20:12:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-09-30 20:12:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-09-30 20:12:14,419 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-09-30 20:12:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:14,419 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-09-30 20:12:14,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:12:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-09-30 20:12:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-09-30 20:12:14,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:14,422 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-09-30 20:12:14,422 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:14,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:14,422 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-09-30 20:12:14,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:14,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:14,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:14,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:14,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-30 20:12:15,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:15,588 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:15,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:16,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-09-30 20:12:16,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:16,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-30 20:12:16,969 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:16,969 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:12:16,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:12:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:12:16,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:12:16,970 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-09-30 20:12:17,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:17,836 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-09-30 20:12:17,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:12:17,838 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-09-30 20:12:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:17,840 INFO L225 Difference]: With dead ends: 533 [2018-09-30 20:12:17,840 INFO L226 Difference]: Without dead ends: 531 [2018-09-30 20:12:17,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:12:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-30 20:12:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-09-30 20:12:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-30 20:12:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-09-30 20:12:18,100 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-09-30 20:12:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:18,100 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-09-30 20:12:18,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:12:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-09-30 20:12:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-09-30 20:12:18,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:18,102 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-09-30 20:12:18,102 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:18,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:18,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-09-30 20:12:18,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:18,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:18,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:18,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:18,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-30 20:12:19,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:19,119 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:19,130 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:19,421 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:19,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:19,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-30 20:12:19,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:19,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:12:19,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:12:19,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:12:19,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:12:19,668 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-09-30 20:12:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:20,260 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-09-30 20:12:20,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:12:20,263 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-09-30 20:12:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:20,265 INFO L225 Difference]: With dead ends: 545 [2018-09-30 20:12:20,265 INFO L226 Difference]: Without dead ends: 543 [2018-09-30 20:12:20,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:12:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-09-30 20:12:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-09-30 20:12:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-30 20:12:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-09-30 20:12:20,544 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-09-30 20:12:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:20,544 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-09-30 20:12:20,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:12:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-09-30 20:12:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-09-30 20:12:20,546 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:20,547 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-09-30 20:12:20,547 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:20,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:20,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-09-30 20:12:20,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:20,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:20,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:20,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:20,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:20,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-30 20:12:21,893 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:21,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:21,900 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:23,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-09-30 20:12:23,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:23,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-30 20:12:23,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:23,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:12:23,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:12:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:12:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:12:23,244 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-09-30 20:12:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:23,889 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-09-30 20:12:23,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:12:23,895 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-09-30 20:12:23,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:23,897 INFO L225 Difference]: With dead ends: 557 [2018-09-30 20:12:23,897 INFO L226 Difference]: Without dead ends: 555 [2018-09-30 20:12:23,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:12:23,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-09-30 20:12:24,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-09-30 20:12:24,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-09-30 20:12:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-09-30 20:12:24,161 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-09-30 20:12:24,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:24,161 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-09-30 20:12:24,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:12:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-09-30 20:12:24,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-09-30 20:12:24,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:24,164 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-09-30 20:12:24,164 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:24,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:24,164 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-09-30 20:12:24,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:24,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:24,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:24,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:24,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-30 20:12:25,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:25,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:25,248 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:26,381 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-09-30 20:12:26,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:26,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-30 20:12:26,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:26,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:12:26,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:12:26,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:12:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:12:26,628 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-09-30 20:12:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:27,233 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-09-30 20:12:27,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:12:27,240 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-09-30 20:12:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:27,242 INFO L225 Difference]: With dead ends: 569 [2018-09-30 20:12:27,243 INFO L226 Difference]: Without dead ends: 567 [2018-09-30 20:12:27,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:12:27,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-09-30 20:12:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-09-30 20:12:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-09-30 20:12:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-09-30 20:12:27,524 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-09-30 20:12:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:27,525 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-09-30 20:12:27,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:12:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-09-30 20:12:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-09-30 20:12:27,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:27,527 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-09-30 20:12:27,527 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:27,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:27,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-09-30 20:12:27,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:27,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:27,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:27,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:27,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-30 20:12:28,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:28,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:28,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:29,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-30 20:12:29,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:29,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:12:29,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:12:29,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:12:29,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:12:29,326 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-09-30 20:12:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:29,886 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-09-30 20:12:29,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:12:29,887 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-09-30 20:12:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:29,889 INFO L225 Difference]: With dead ends: 581 [2018-09-30 20:12:29,889 INFO L226 Difference]: Without dead ends: 579 [2018-09-30 20:12:29,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:12:29,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-09-30 20:12:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-09-30 20:12:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-09-30 20:12:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-09-30 20:12:30,173 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-09-30 20:12:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:30,174 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-09-30 20:12:30,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:12:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-09-30 20:12:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-30 20:12:30,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:30,177 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-09-30 20:12:30,178 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:30,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:30,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-09-30 20:12:30,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:30,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:30,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:30,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:30,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-30 20:12:31,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:31,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:31,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:32,160 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:32,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:32,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-30 20:12:32,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:32,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:12:32,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:12:32,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:12:32,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:12:32,417 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-09-30 20:12:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:32,977 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-09-30 20:12:32,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:12:32,978 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-09-30 20:12:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:32,980 INFO L225 Difference]: With dead ends: 593 [2018-09-30 20:12:32,980 INFO L226 Difference]: Without dead ends: 591 [2018-09-30 20:12:32,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:12:32,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-09-30 20:12:33,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-09-30 20:12:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-09-30 20:12:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-09-30 20:12:33,282 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-09-30 20:12:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:33,283 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-09-30 20:12:33,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:12:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-09-30 20:12:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-09-30 20:12:33,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:33,286 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-09-30 20:12:33,286 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:33,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:33,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-09-30 20:12:33,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:33,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:33,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:33,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:33,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-30 20:12:34,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:34,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:34,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:35,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-09-30 20:12:35,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:36,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-30 20:12:36,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:36,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:12:36,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:12:36,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:12:36,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:12:36,275 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-09-30 20:12:36,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:36,869 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-09-30 20:12:36,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:12:36,869 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-09-30 20:12:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:36,871 INFO L225 Difference]: With dead ends: 605 [2018-09-30 20:12:36,871 INFO L226 Difference]: Without dead ends: 603 [2018-09-30 20:12:36,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:12:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-09-30 20:12:37,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-09-30 20:12:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-09-30 20:12:37,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-09-30 20:12:37,170 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-09-30 20:12:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:37,170 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-09-30 20:12:37,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:12:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-09-30 20:12:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-09-30 20:12:37,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:37,173 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-09-30 20:12:37,173 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:37,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:37,174 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-09-30 20:12:37,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:37,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:37,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:37,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:37,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:38,475 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-30 20:12:38,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:38,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:38,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:38,812 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:38,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:38,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-30 20:12:39,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:39,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:12:39,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:12:39,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:12:39,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:12:39,160 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-09-30 20:12:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:39,769 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-09-30 20:12:39,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:12:39,769 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-09-30 20:12:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:39,771 INFO L225 Difference]: With dead ends: 617 [2018-09-30 20:12:39,771 INFO L226 Difference]: Without dead ends: 615 [2018-09-30 20:12:39,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:12:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-09-30 20:12:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-09-30 20:12:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-09-30 20:12:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-09-30 20:12:40,103 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-09-30 20:12:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:40,103 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-09-30 20:12:40,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:12:40,103 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-09-30 20:12:40,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-09-30 20:12:40,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:40,106 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-09-30 20:12:40,107 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:40,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:40,107 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-09-30 20:12:40,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:40,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:40,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:40,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:40,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-30 20:12:41,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:41,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:41,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:43,178 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-09-30 20:12:43,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:43,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-30 20:12:43,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:43,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:12:43,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:12:43,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:12:43,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:12:43,487 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-09-30 20:12:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:44,140 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-09-30 20:12:44,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:12:44,141 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-09-30 20:12:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:44,143 INFO L225 Difference]: With dead ends: 629 [2018-09-30 20:12:44,143 INFO L226 Difference]: Without dead ends: 627 [2018-09-30 20:12:44,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:12:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-09-30 20:12:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-09-30 20:12:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-09-30 20:12:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-09-30 20:12:44,485 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-09-30 20:12:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:44,485 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-09-30 20:12:44,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:12:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-09-30 20:12:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-09-30 20:12:44,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:44,488 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-09-30 20:12:44,488 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:44,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-09-30 20:12:44,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:44,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:44,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:44,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:44,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-30 20:12:45,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:45,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:45,952 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:47,384 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-09-30 20:12:47,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:47,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-30 20:12:47,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:47,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:12:47,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:12:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:12:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:12:47,692 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-09-30 20:12:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:48,456 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-09-30 20:12:48,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:12:48,456 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-09-30 20:12:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:48,458 INFO L225 Difference]: With dead ends: 641 [2018-09-30 20:12:48,458 INFO L226 Difference]: Without dead ends: 639 [2018-09-30 20:12:48,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:12:48,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-09-30 20:12:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-09-30 20:12:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-09-30 20:12:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-09-30 20:12:48,800 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-09-30 20:12:48,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:48,801 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-09-30 20:12:48,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:12:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-09-30 20:12:48,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-09-30 20:12:48,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:48,804 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-09-30 20:12:48,804 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:48,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:48,805 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-09-30 20:12:48,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:48,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:48,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:48,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:48,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-30 20:12:50,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:50,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:50,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:50,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-30 20:12:51,023 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:51,023 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:12:51,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:12:51,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:12:51,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:12:51,025 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-09-30 20:12:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:51,672 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-09-30 20:12:51,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:12:51,672 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-09-30 20:12:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:51,675 INFO L225 Difference]: With dead ends: 653 [2018-09-30 20:12:51,675 INFO L226 Difference]: Without dead ends: 651 [2018-09-30 20:12:51,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:12:51,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-09-30 20:12:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-09-30 20:12:52,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-09-30 20:12:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-09-30 20:12:52,071 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-09-30 20:12:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:52,072 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-09-30 20:12:52,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:12:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-09-30 20:12:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-09-30 20:12:52,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:52,075 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-09-30 20:12:52,075 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:52,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-09-30 20:12:52,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:52,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:52,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:52,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:52,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-30 20:12:53,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:53,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:53,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:53,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:53,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:53,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-30 20:12:54,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:54,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:12:54,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:12:54,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:12:54,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:12:54,177 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-09-30 20:12:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:54,928 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-09-30 20:12:54,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:12:54,929 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-09-30 20:12:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:54,931 INFO L225 Difference]: With dead ends: 665 [2018-09-30 20:12:54,931 INFO L226 Difference]: Without dead ends: 663 [2018-09-30 20:12:54,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:12:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-09-30 20:12:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-09-30 20:12:55,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-09-30 20:12:55,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-09-30 20:12:55,303 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-09-30 20:12:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:55,303 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-09-30 20:12:55,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:12:55,304 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-09-30 20:12:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-09-30 20:12:55,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:55,307 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-09-30 20:12:55,307 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:55,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:55,307 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-09-30 20:12:55,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:55,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:55,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:55,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:55,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-30 20:12:57,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:57,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:57,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:58,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-09-30 20:12:58,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:58,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-30 20:12:59,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:59,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:12:59,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:12:59,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:12:59,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:12:59,288 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-09-30 20:13:00,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:00,074 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-09-30 20:13:00,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:13:00,074 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-09-30 20:13:00,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:00,077 INFO L225 Difference]: With dead ends: 677 [2018-09-30 20:13:00,077 INFO L226 Difference]: Without dead ends: 675 [2018-09-30 20:13:00,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:13:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-09-30 20:13:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-09-30 20:13:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-09-30 20:13:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-09-30 20:13:00,468 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-09-30 20:13:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:00,468 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-09-30 20:13:00,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:13:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-09-30 20:13:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-09-30 20:13:00,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:00,473 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-09-30 20:13:00,473 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:00,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-09-30 20:13:00,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:00,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:00,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:00,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:00,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-30 20:13:02,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:02,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:02,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:02,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:02,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:02,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-30 20:13:02,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:02,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:13:02,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:13:02,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:13:02,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:13:02,991 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-09-30 20:13:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:03,794 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-09-30 20:13:03,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:13:03,795 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-09-30 20:13:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:03,797 INFO L225 Difference]: With dead ends: 689 [2018-09-30 20:13:03,797 INFO L226 Difference]: Without dead ends: 687 [2018-09-30 20:13:03,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:13:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-09-30 20:13:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-09-30 20:13:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-09-30 20:13:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-09-30 20:13:04,200 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-09-30 20:13:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:04,200 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-09-30 20:13:04,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:13:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-09-30 20:13:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-09-30 20:13:04,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:04,204 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-09-30 20:13:04,204 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:04,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:04,204 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-09-30 20:13:04,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:04,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:04,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:04,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:04,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-30 20:13:05,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:05,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:05,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:07,797 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-09-30 20:13:07,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:07,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-30 20:13:08,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:08,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:13:08,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:13:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:13:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:13:08,136 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-09-30 20:13:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:08,923 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-09-30 20:13:08,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:13:08,924 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-09-30 20:13:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:08,926 INFO L225 Difference]: With dead ends: 701 [2018-09-30 20:13:08,926 INFO L226 Difference]: Without dead ends: 699 [2018-09-30 20:13:08,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:13:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-09-30 20:13:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-09-30 20:13:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-09-30 20:13:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-09-30 20:13:09,347 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-09-30 20:13:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:09,348 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-09-30 20:13:09,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:13:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-09-30 20:13:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-09-30 20:13:09,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:09,351 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-09-30 20:13:09,351 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:09,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:09,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-09-30 20:13:09,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:09,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:09,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:09,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:09,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-30 20:13:11,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:11,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:11,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:12,799 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-09-30 20:13:12,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:12,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-30 20:13:13,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:13,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:13:13,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:13:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:13:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:13:13,139 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-09-30 20:13:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:13,922 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-09-30 20:13:13,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:13:13,923 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-09-30 20:13:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:13,925 INFO L225 Difference]: With dead ends: 713 [2018-09-30 20:13:13,925 INFO L226 Difference]: Without dead ends: 711 [2018-09-30 20:13:13,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:13:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-09-30 20:13:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-09-30 20:13:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-09-30 20:13:14,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-09-30 20:13:14,372 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-09-30 20:13:14,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:14,373 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-09-30 20:13:14,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:13:14,373 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-09-30 20:13:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-09-30 20:13:14,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:14,377 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-09-30 20:13:14,377 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:14,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:14,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-09-30 20:13:14,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:14,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:14,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:14,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:14,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:16,149 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-30 20:13:16,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:16,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:16,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:16,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-30 20:13:16,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:16,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:13:16,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:13:16,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:13:16,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:13:16,872 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-09-30 20:13:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:17,727 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-09-30 20:13:17,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:13:17,727 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-09-30 20:13:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:17,729 INFO L225 Difference]: With dead ends: 725 [2018-09-30 20:13:17,729 INFO L226 Difference]: Without dead ends: 723 [2018-09-30 20:13:17,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:13:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-09-30 20:13:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-09-30 20:13:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-09-30 20:13:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-09-30 20:13:18,190 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-09-30 20:13:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:18,190 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-09-30 20:13:18,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:13:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-09-30 20:13:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-09-30 20:13:18,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:18,194 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-09-30 20:13:18,195 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:18,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:18,195 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-09-30 20:13:18,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:18,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:18,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:18,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:18,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-30 20:13:20,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:20,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:20,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:20,441 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:20,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:20,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-30 20:13:20,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:20,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:13:20,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:13:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:13:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:13:20,853 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-09-30 20:13:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:21,741 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-09-30 20:13:21,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:13:21,741 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-09-30 20:13:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:21,743 INFO L225 Difference]: With dead ends: 737 [2018-09-30 20:13:21,744 INFO L226 Difference]: Without dead ends: 735 [2018-09-30 20:13:21,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:13:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-09-30 20:13:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-09-30 20:13:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-09-30 20:13:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-09-30 20:13:22,222 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-09-30 20:13:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:22,222 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-09-30 20:13:22,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:13:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-09-30 20:13:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-09-30 20:13:22,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:22,226 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-09-30 20:13:22,227 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:22,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:22,227 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-09-30 20:13:22,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:22,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:22,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:22,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:22,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-30 20:13:24,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:24,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:24,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:26,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-09-30 20:13:26,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:26,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-30 20:13:26,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:26,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 20:13:26,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:13:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:13:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:13:26,748 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-09-30 20:13:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:28,022 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-09-30 20:13:28,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:13:28,022 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-09-30 20:13:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:28,026 INFO L225 Difference]: With dead ends: 749 [2018-09-30 20:13:28,026 INFO L226 Difference]: Without dead ends: 747 [2018-09-30 20:13:28,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:13:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-09-30 20:13:28,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-09-30 20:13:28,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-09-30 20:13:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-09-30 20:13:28,640 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-09-30 20:13:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:28,641 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-09-30 20:13:28,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:13:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-09-30 20:13:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-09-30 20:13:28,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:28,645 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-09-30 20:13:28,645 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:28,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-09-30 20:13:28,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:28,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:28,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:28,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:28,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:30,607 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-30 20:13:30,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:30,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:30,616 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:31,023 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:31,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:31,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-30 20:13:31,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:31,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:13:31,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:13:31,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:13:31,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:13:31,435 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-09-30 20:13:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:32,390 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-09-30 20:13:32,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:13:32,390 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-09-30 20:13:32,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:32,393 INFO L225 Difference]: With dead ends: 761 [2018-09-30 20:13:32,393 INFO L226 Difference]: Without dead ends: 759 [2018-09-30 20:13:32,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:13:32,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-09-30 20:13:32,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-09-30 20:13:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-09-30 20:13:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-09-30 20:13:32,905 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-09-30 20:13:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:32,905 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-09-30 20:13:32,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:13:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-09-30 20:13:32,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-09-30 20:13:32,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:32,910 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-09-30 20:13:32,910 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:32,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:32,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-09-30 20:13:32,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:32,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:32,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:32,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:32,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:34,924 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-30 20:13:34,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:34,925 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:34,937 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:37,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-09-30 20:13:37,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:37,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-30 20:13:37,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:37,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:13:37,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:13:37,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:13:37,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:13:37,437 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-09-30 20:13:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:38,377 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-09-30 20:13:38,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:13:38,377 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-09-30 20:13:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:38,380 INFO L225 Difference]: With dead ends: 773 [2018-09-30 20:13:38,380 INFO L226 Difference]: Without dead ends: 771 [2018-09-30 20:13:38,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:13:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-09-30 20:13:38,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-09-30 20:13:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-09-30 20:13:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-09-30 20:13:38,905 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-09-30 20:13:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:38,905 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-09-30 20:13:38,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:13:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-09-30 20:13:38,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-09-30 20:13:38,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:38,909 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-09-30 20:13:38,910 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:38,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:38,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-09-30 20:13:38,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:38,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:38,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:38,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:38,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-30 20:13:40,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:40,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:40,954 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:43,211 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-09-30 20:13:43,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:43,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-30 20:13:43,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:43,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 20:13:43,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:13:43,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:13:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:13:43,591 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-09-30 20:13:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:44,632 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-09-30 20:13:44,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:13:44,633 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-09-30 20:13:44,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:44,635 INFO L225 Difference]: With dead ends: 785 [2018-09-30 20:13:44,635 INFO L226 Difference]: Without dead ends: 783 [2018-09-30 20:13:44,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:13:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-09-30 20:13:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-09-30 20:13:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-09-30 20:13:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-09-30 20:13:45,178 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-09-30 20:13:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:45,179 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-09-30 20:13:45,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:13:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-09-30 20:13:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-09-30 20:13:45,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:45,183 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-09-30 20:13:45,183 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:45,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:45,184 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-09-30 20:13:45,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:45,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:45,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:45,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:45,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-30 20:13:47,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:47,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:47,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:47,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-30 20:13:48,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:48,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:13:48,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:13:48,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:13:48,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:13:48,116 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-09-30 20:13:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:49,152 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-09-30 20:13:49,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:13:49,152 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-09-30 20:13:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:49,155 INFO L225 Difference]: With dead ends: 797 [2018-09-30 20:13:49,155 INFO L226 Difference]: Without dead ends: 795 [2018-09-30 20:13:49,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:13:49,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-09-30 20:13:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-09-30 20:13:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-09-30 20:13:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-09-30 20:13:49,718 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-09-30 20:13:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:49,719 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-09-30 20:13:49,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:13:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-09-30 20:13:49,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-09-30 20:13:49,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:49,723 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-09-30 20:13:49,723 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:49,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:49,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-09-30 20:13:49,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:49,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:49,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:49,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:49,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-30 20:13:51,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:51,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:51,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:52,301 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:52,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:52,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-30 20:13:52,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:52,759 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:13:52,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:13:52,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:13:52,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:13:52,761 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-09-30 20:13:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:53,881 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-09-30 20:13:53,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:13:53,882 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-09-30 20:13:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:53,884 INFO L225 Difference]: With dead ends: 809 [2018-09-30 20:13:53,884 INFO L226 Difference]: Without dead ends: 807 [2018-09-30 20:13:53,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:13:53,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-09-30 20:13:54,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-09-30 20:13:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-09-30 20:13:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-09-30 20:13:54,477 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-09-30 20:13:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:54,478 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-09-30 20:13:54,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:13:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-09-30 20:13:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-09-30 20:13:54,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:54,483 INFO L375 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-09-30 20:13:54,483 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:54,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 69 times [2018-09-30 20:13:54,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:54,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:54,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:54,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:54,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-30 20:13:56,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:56,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:56,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:59,153 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 397 check-sat command(s) [2018-09-30 20:13:59,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:59,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-30 20:13:59,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:59,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 20:13:59,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:13:59,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:13:59,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:13:59,678 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-09-30 20:14:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:00,812 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-09-30 20:14:00,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:14:00,812 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-09-30 20:14:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:00,815 INFO L225 Difference]: With dead ends: 821 [2018-09-30 20:14:00,815 INFO L226 Difference]: Without dead ends: 819 [2018-09-30 20:14:00,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:14:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-09-30 20:14:01,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-09-30 20:14:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-09-30 20:14:01,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-09-30 20:14:01,421 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-09-30 20:14:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:01,422 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-09-30 20:14:01,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:14:01,422 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-09-30 20:14:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-09-30 20:14:01,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:01,427 INFO L375 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-09-30 20:14:01,427 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:01,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:01,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 70 times [2018-09-30 20:14:01,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:01,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:01,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:01,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:01,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-30 20:14:04,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:04,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:04,056 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:04,498 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:04,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:04,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-30 20:14:05,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:05,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:14:05,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:14:05,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:14:05,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:14:05,032 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-09-30 20:14:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:06,241 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-09-30 20:14:06,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:14:06,242 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-09-30 20:14:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:06,245 INFO L225 Difference]: With dead ends: 833 [2018-09-30 20:14:06,245 INFO L226 Difference]: Without dead ends: 831 [2018-09-30 20:14:06,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:14:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-09-30 20:14:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-09-30 20:14:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-30 20:14:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-09-30 20:14:06,904 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-09-30 20:14:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:06,904 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-09-30 20:14:06,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:14:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-09-30 20:14:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-09-30 20:14:06,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:06,909 INFO L375 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-09-30 20:14:06,909 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:06,909 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 71 times [2018-09-30 20:14:06,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:06,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:06,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:06,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:06,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-30 20:14:09,516 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:09,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:09,522 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:14:12,077 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 409 check-sat command(s) [2018-09-30 20:14:12,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:12,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-30 20:14:12,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:12,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:14:12,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:14:12,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:14:12,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:14:12,578 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-09-30 20:14:13,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:13,710 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-09-30 20:14:13,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:14:13,711 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-09-30 20:14:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:13,714 INFO L225 Difference]: With dead ends: 845 [2018-09-30 20:14:13,714 INFO L226 Difference]: Without dead ends: 843 [2018-09-30 20:14:13,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 819 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:14:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-09-30 20:14:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-09-30 20:14:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-09-30 20:14:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-09-30 20:14:14,397 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-09-30 20:14:14,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:14,397 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-09-30 20:14:14,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:14:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-09-30 20:14:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-09-30 20:14:14,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:14,402 INFO L375 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-09-30 20:14:14,403 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:14,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:14,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 72 times [2018-09-30 20:14:14,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:14,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:14,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:14,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:14,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-30 20:14:16,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:16,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:16,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:14:19,743 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 411 check-sat command(s) [2018-09-30 20:14:19,743 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:19,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:20,344 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-30 20:14:20,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:20,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 20:14:20,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:14:20,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:14:20,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:14:20,369 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-09-30 20:14:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:21,662 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-09-30 20:14:21,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:14:21,663 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-09-30 20:14:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:21,665 INFO L225 Difference]: With dead ends: 857 [2018-09-30 20:14:21,665 INFO L226 Difference]: Without dead ends: 855 [2018-09-30 20:14:21,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:14:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-09-30 20:14:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-09-30 20:14:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-09-30 20:14:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-09-30 20:14:22,355 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-09-30 20:14:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:22,356 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-09-30 20:14:22,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:14:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-09-30 20:14:22,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-09-30 20:14:22,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:22,361 INFO L375 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-09-30 20:14:22,361 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:22,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:22,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 73 times [2018-09-30 20:14:22,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:22,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:22,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:22,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:22,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-30 20:14:25,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:25,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:25,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:25,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-30 20:14:26,096 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:26,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:14:26,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:14:26,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:14:26,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:14:26,098 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-09-30 20:14:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:27,304 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-09-30 20:14:27,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:14:27,304 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-09-30 20:14:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:27,306 INFO L225 Difference]: With dead ends: 869 [2018-09-30 20:14:27,306 INFO L226 Difference]: Without dead ends: 867 [2018-09-30 20:14:27,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:14:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-09-30 20:14:27,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-09-30 20:14:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-09-30 20:14:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-09-30 20:14:28,001 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-09-30 20:14:28,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:28,001 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-09-30 20:14:28,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:14:28,001 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-09-30 20:14:28,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-09-30 20:14:28,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:28,007 INFO L375 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-09-30 20:14:28,007 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:28,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:28,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 74 times [2018-09-30 20:14:28,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:28,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:28,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:28,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:28,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-30 20:14:30,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:30,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:30,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:14:31,272 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:14:31,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:31,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-30 20:14:31,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:31,756 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:14:31,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:14:31,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:14:31,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:14:31,757 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-09-30 20:14:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:33,012 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-09-30 20:14:33,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:14:33,012 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-09-30 20:14:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:33,014 INFO L225 Difference]: With dead ends: 881 [2018-09-30 20:14:33,014 INFO L226 Difference]: Without dead ends: 879 [2018-09-30 20:14:33,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:14:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-09-30 20:14:33,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-09-30 20:14:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-09-30 20:14:33,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-09-30 20:14:33,777 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-09-30 20:14:33,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:33,778 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-09-30 20:14:33,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:14:33,778 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-09-30 20:14:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-09-30 20:14:33,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:33,783 INFO L375 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-09-30 20:14:33,783 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:33,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:33,783 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 75 times [2018-09-30 20:14:33,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:33,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:33,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:33,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:33,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-30 20:14:36,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:36,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:36,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:14:39,504 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 433 check-sat command(s) [2018-09-30 20:14:39,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:39,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-30 20:14:40,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:40,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 20:14:40,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:14:40,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:14:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:14:40,035 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-09-30 20:14:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:41,301 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-09-30 20:14:41,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:14:41,301 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-09-30 20:14:41,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:41,303 INFO L225 Difference]: With dead ends: 893 [2018-09-30 20:14:41,303 INFO L226 Difference]: Without dead ends: 891 [2018-09-30 20:14:41,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:14:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-09-30 20:14:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-09-30 20:14:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-09-30 20:14:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-09-30 20:14:42,071 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-09-30 20:14:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:42,071 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-09-30 20:14:42,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:14:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-09-30 20:14:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-09-30 20:14:42,076 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:42,076 INFO L375 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-09-30 20:14:42,076 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:42,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 76 times [2018-09-30 20:14:42,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:42,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:42,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:42,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:42,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-30 20:14:45,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:45,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:45,012 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:45,486 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:45,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:45,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-30 20:14:46,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:46,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:14:46,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:14:46,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:14:46,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:14:46,049 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-09-30 20:14:47,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:47,270 INFO L93 Difference]: Finished difference Result 905 states and 980 transitions. [2018-09-30 20:14:47,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:14:47,270 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 879 [2018-09-30 20:14:47,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:47,272 INFO L225 Difference]: With dead ends: 905 [2018-09-30 20:14:47,272 INFO L226 Difference]: Without dead ends: 903 [2018-09-30 20:14:47,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:14:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2018-09-30 20:14:48,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 892. [2018-09-30 20:14:48,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-09-30 20:14:48,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 966 transitions. [2018-09-30 20:14:48,037 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 966 transitions. Word has length 879 [2018-09-30 20:14:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:48,037 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 966 transitions. [2018-09-30 20:14:48,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:14:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 966 transitions. [2018-09-30 20:14:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-09-30 20:14:48,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:48,043 INFO L375 BasicCegarLoop]: trace histogram [740, 74, 74, 1, 1, 1] [2018-09-30 20:14:48,043 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:48,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash -811917977, now seen corresponding path program 77 times [2018-09-30 20:14:48,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:48,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:48,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:48,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:48,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-30 20:14:51,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:51,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:51,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:14:54,501 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 445 check-sat command(s) [2018-09-30 20:14:54,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:54,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-30 20:14:55,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:55,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:14:55,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:14:55,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:14:55,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:14:55,062 INFO L87 Difference]: Start difference. First operand 892 states and 966 transitions. Second operand 77 states. [2018-09-30 20:14:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:56,445 INFO L93 Difference]: Finished difference Result 917 states and 993 transitions. [2018-09-30 20:14:56,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:14:56,445 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 891 [2018-09-30 20:14:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:56,447 INFO L225 Difference]: With dead ends: 917 [2018-09-30 20:14:56,447 INFO L226 Difference]: Without dead ends: 915 [2018-09-30 20:14:56,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:14:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-30 20:14:57,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 904. [2018-09-30 20:14:57,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2018-09-30 20:14:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2018-09-30 20:14:57,245 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 891 [2018-09-30 20:14:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:57,246 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2018-09-30 20:14:57,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:14:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2018-09-30 20:14:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-09-30 20:14:57,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:57,253 INFO L375 BasicCegarLoop]: trace histogram [750, 75, 75, 1, 1, 1] [2018-09-30 20:14:57,253 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:57,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:57,253 INFO L82 PathProgramCache]: Analyzing trace with hash -543261007, now seen corresponding path program 78 times [2018-09-30 20:14:57,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:57,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:57,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:57,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:57,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:15:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-30 20:15:00,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:15:00,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:15:00,365 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:15:03,687 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 446 check-sat command(s) [2018-09-30 20:15:03,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:15:03,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:15:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-30 20:15:04,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:15:04,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 20:15:04,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:15:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:15:04,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:15:04,274 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand 78 states. [2018-09-30 20:15:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:15:05,654 INFO L93 Difference]: Finished difference Result 929 states and 1006 transitions. [2018-09-30 20:15:05,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:15:05,654 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 903 [2018-09-30 20:15:05,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:15:05,655 INFO L225 Difference]: With dead ends: 929 [2018-09-30 20:15:05,656 INFO L226 Difference]: Without dead ends: 927 [2018-09-30 20:15:05,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:15:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-09-30 20:15:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 916. [2018-09-30 20:15:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2018-09-30 20:15:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 992 transitions. [2018-09-30 20:15:06,503 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 992 transitions. Word has length 903 [2018-09-30 20:15:06,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:15:06,503 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 992 transitions. [2018-09-30 20:15:06,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:15:06,503 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 992 transitions. [2018-09-30 20:15:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-09-30 20:15:06,508 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:15:06,509 INFO L375 BasicCegarLoop]: trace histogram [760, 76, 76, 1, 1, 1] [2018-09-30 20:15:06,509 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:15:06,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:15:06,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1703395077, now seen corresponding path program 79 times [2018-09-30 20:15:06,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:15:06,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:15:06,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:06,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:15:06,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:15:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 20:15:07,009 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:15:07,013 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:15:07,014 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:15:07 BoogieIcfgContainer [2018-09-30 20:15:07,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:15:07,015 INFO L168 Benchmark]: Toolchain (without parser) took 245404.96 ms. Allocated memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: 1.8 GB). Free memory was 1.5 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 459.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:15:07,016 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. [2018-09-30 20:15:07,017 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:15:07,017 INFO L168 Benchmark]: Boogie Preprocessor took 24.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:15:07,017 INFO L168 Benchmark]: RCFGBuilder took 347.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:15:07,018 INFO L168 Benchmark]: TraceAbstraction took 244982.73 ms. Allocated memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: 1.8 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 438.0 MB. Max. memory is 7.1 GB. [2018-09-30 20:15:07,020 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 44.27 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 24.44 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 347.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244982.73 ms. Allocated memory was 1.5 GB in the beginning and 3.3 GB in the end (delta: 1.8 GB). Free memory was 1.4 GB in the beginning and 2.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 438.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 35]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 35). Cancelled while BasicCegarLoop was analyzing trace of length 916 with TraceHistMax 760, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 28 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 244.9s OverallTime, 81 OverallIterations, 760 TraceHistogramMax, 52.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 318 SDtfs, 5846 SDslu, 4263 SDs, 0 SdLazy, 7420 SolverSat, 457 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37575 GetRequests, 34385 SyntacticMatches, 0 SemanticMatches, 3190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5190 ImplicationChecksByTransitivity, 80.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=916occurred in iteration=80, 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: 20.7s AutomataMinimizationTime, 80 MinimizatonAttempts, 807 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 4.3s SsaConstructionTime, 52.6s SatisfiabilityAnalysisTime, 96.5s InterpolantComputationTime, 68840 NumberOfCodeBlocks, 68669 NumberOfCodeBlocksAsserted, 8912 NumberOfCheckSat, 68682 ConstructedInterpolants, 0 QuantifiedInterpolants, 124587192 SizeOfPredicates, 78 NumberOfNonLiveVariables, 137598 ConjunctsInSsa, 3030 ConjunctsInUnsatCore, 158 InterpolantComputations, 2 PerfectInterpolantSequences, 315983/17469377 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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-15-07-029.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-15-07-029.csv Completed graceful shutdown