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_PUPT.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 12:07:40,426 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 12:07:40,428 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 12:07:40,440 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 12:07:40,440 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 12:07:40,441 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 12:07:40,443 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 12:07:40,444 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 12:07:40,446 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 12:07:40,447 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 12:07:40,448 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 12:07:40,476 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-02 12:07:40,491 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 12:07:40,491 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 12:07:40,492 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 12:07:40,492 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 12:07:40,493 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 12:07:40,493 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 12:07:40,493 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 12:07:40,494 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 12:07:40,494 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 12:07:40,494 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 12:07:40,494 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 12:07:40,494 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 12:07:40,495 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 12:07:40,495 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 12:07:40,495 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 12:07:40,495 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 12:07:40,495 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 12:07:40,496 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 12:07:40,496 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 12:07:40,496 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 12:07:40,496 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 12:07:40,496 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 12:07:40,497 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:07:40,497 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 12:07:40,497 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 12:07:40,497 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 12:07:40,497 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 12:07:40,497 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 12:07:40,498 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 12:07:40,498 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 12:07:40,498 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-02 12:07:40,543 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 12:07:40,556 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 12:07:40,560 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 12:07:40,561 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 12:07:40,562 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 12:07:40,562 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-10-02 12:07:40,563 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl' [2018-10-02 12:07:40,610 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 12:07:40,614 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 12:07:40,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 12:07:40,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 12:07:40,615 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 12:07:40,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... [2018-10-02 12:07:40,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... [2018-10-02 12:07:40,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 12:07:40,653 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 12:07:40,653 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 12:07:40,653 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 12:07:40,664 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... [2018-10-02 12:07:40,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... [2018-10-02 12:07:40,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... [2018-10-02 12:07:40,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... [2018-10-02 12:07:40,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... [2018-10-02 12:07:40,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... [2018-10-02 12:07:40,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... [2018-10-02 12:07:40,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 12:07:40,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 12:07:40,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 12:07:40,673 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 12:07:40,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 12:07:40,746 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-02 12:07:40,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 12:07:40,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 12:07:40,998 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 12:07:40,999 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:07:40 BoogieIcfgContainer [2018-10-02 12:07:40,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 12:07:41,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 12:07:41,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 12:07:41,007 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 12:07:41,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 12:07:40" (1/2) ... [2018-10-02 12:07:41,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e4905f6 and model type gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 12:07:41, skipping insertion in model container [2018-10-02 12:07:41,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 12:07:40" (2/2) ... [2018-10-02 12:07:41,011 INFO L112 eAbstractionObserver]: Analyzing ICFG gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl [2018-10-02 12:07:41,022 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 12:07:41,034 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 12:07:41,091 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 12:07:41,092 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 12:07:41,092 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 12:07:41,093 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 12:07:41,093 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 12:07:41,093 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 12:07:41,093 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 12:07:41,093 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 12:07:41,094 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 12:07:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-02 12:07:41,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 12:07:41,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:41,116 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 12:07:41,117 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:41,123 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:41,124 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-02 12:07:41,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:41,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:41,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:41,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:07:41,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:41,202 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:41,202 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:41,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:41,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:07:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:07:41,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:41,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 12:07:41,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 12:07:41,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 12:07:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 12:07:41,342 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:41,344 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-02 12:07:41,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:41,523 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-02 12:07:41,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 12:07:41,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 12:07:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:41,538 INFO L225 Difference]: With dead ends: 9 [2018-10-02 12:07:41,539 INFO L226 Difference]: Without dead ends: 5 [2018-10-02 12:07:41,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:07:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-02 12:07:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-02 12:07:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-02 12:07:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-02 12:07:41,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-02 12:07:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:41,578 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-02 12:07:41,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 12:07:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-02 12:07:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 12:07:41,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:41,579 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 12:07:41,580 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:41,580 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:41,580 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-10-02 12:07:41,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:41,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:41,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:41,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:07:41,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:41,594 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:41,594 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:41,594 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:41,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:07:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:07:41,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:41,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:41,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-10-02 12:07:41,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 12:07:41,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 12:07:41,708 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:41,708 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-02 12:07:41,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:41,840 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-02 12:07:41,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 12:07:41,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-02 12:07:41,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:41,841 INFO L225 Difference]: With dead ends: 8 [2018-10-02 12:07:41,841 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 12:07:41,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:07:41,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 12:07:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 12:07:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 12:07:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 12:07:41,845 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-02 12:07:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:41,846 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 12:07:41,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 12:07:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 12:07:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 12:07:41,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:41,847 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-02 12:07:41,847 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:41,847 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-10-02 12:07:41,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:41,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:41,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:41,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:07:41,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:41,857 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:41,857 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:41,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:41,875 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:07:41,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:07:41,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:41,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:42,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:42,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-02 12:07:42,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 12:07:42,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 12:07:42,045 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:42,045 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-02 12:07:42,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:42,368 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 12:07:42,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 12:07:42,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-02 12:07:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:42,370 INFO L225 Difference]: With dead ends: 9 [2018-10-02 12:07:42,370 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 12:07:42,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:07:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 12:07:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 12:07:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 12:07:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 12:07:42,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-02 12:07:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:42,375 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 12:07:42,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 12:07:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 12:07:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 12:07:42,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:42,376 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-02 12:07:42,376 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:42,377 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-10-02 12:07:42,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:42,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:42,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:42,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:42,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:42,386 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:42,386 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:42,387 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:42,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:07:42,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 12:07:42,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:42,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:42,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:42,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-02 12:07:42,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 12:07:42,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 12:07:42,479 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:42,480 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-02 12:07:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:42,836 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-02 12:07:42,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 12:07:42,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-02 12:07:42,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:42,837 INFO L225 Difference]: With dead ends: 10 [2018-10-02 12:07:42,838 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 12:07:42,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:07:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 12:07:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 12:07:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 12:07:42,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 12:07:42,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-02 12:07:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:42,842 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 12:07:42,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 12:07:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 12:07:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 12:07:42,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:42,843 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-02 12:07:42,843 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:42,844 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-10-02 12:07:42,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:42,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:42,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:42,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:42,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:42,854 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:42,854 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:42,854 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:42,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:07:42,874 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:07:42,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:42,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:43,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:43,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-02 12:07:43,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 12:07:43,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 12:07:43,012 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:43,012 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-02 12:07:43,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:43,634 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 12:07:43,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 12:07:43,635 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-02 12:07:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:43,636 INFO L225 Difference]: With dead ends: 11 [2018-10-02 12:07:43,636 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 12:07:43,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:07:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 12:07:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 12:07:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 12:07:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 12:07:43,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-02 12:07:43,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:43,641 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 12:07:43,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 12:07:43,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 12:07:43,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 12:07:43,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:43,642 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-02 12:07:43,642 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:43,642 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:43,643 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-10-02 12:07:43,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:43,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:43,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:43,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:43,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:43,654 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:43,654 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:43,654 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:43,669 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:07:43,681 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 12:07:43,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:43,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:43,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:43,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:43,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-02 12:07:43,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 12:07:43,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 12:07:43,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:43,836 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-02 12:07:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:44,124 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-02 12:07:44,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 12:07:44,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-02 12:07:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:44,125 INFO L225 Difference]: With dead ends: 12 [2018-10-02 12:07:44,125 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 12:07:44,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:07:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 12:07:44,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 12:07:44,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 12:07:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 12:07:44,129 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-02 12:07:44,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:44,129 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 12:07:44,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 12:07:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 12:07:44,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 12:07:44,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:44,130 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-02 12:07:44,131 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:44,131 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:44,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-10-02 12:07:44,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:44,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:44,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:44,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:44,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:44,142 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:44,142 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:44,143 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:44,162 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:07:44,176 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-02 12:07:44,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:44,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:44,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:44,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-02 12:07:44,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 12:07:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 12:07:44,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:44,364 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-02 12:07:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:44,756 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 12:07:44,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 12:07:44,757 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-02 12:07:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:44,757 INFO L225 Difference]: With dead ends: 13 [2018-10-02 12:07:44,758 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 12:07:44,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime [2018-10-02 12:07:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 12:07:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 12:07:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 12:07:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 12:07:44,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-02 12:07:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:44,762 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 12:07:44,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 12:07:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 12:07:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 12:07:44,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:44,763 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-02 12:07:44,763 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:44,763 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-10-02 12:07:44,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:44,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:44,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:44,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:44,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:44,776 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:44,776 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:44,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:44,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:07:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:07:44,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:44,941 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:44,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-02 12:07:44,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 12:07:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 12:07:44,943 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:44,943 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-02 12:07:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:45,330 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-02 12:07:45,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 12:07:45,331 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-02 12:07:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:45,332 INFO L225 Difference]: With dead ends: 14 [2018-10-02 12:07:45,332 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 12:07:45,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime [2018-10-02 12:07:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 12:07:45,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 12:07:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 12:07:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 12:07:45,336 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-02 12:07:45,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:45,336 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 12:07:45,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 12:07:45,336 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 12:07:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 12:07:45,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:45,337 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-02 12:07:45,337 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:45,337 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-10-02 12:07:45,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:45,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:45,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:45,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:07:45,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:45,350 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:45,350 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:45,350 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:45,361 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:07:45,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:07:45,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:45,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:45,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:45,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-02 12:07:45,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 12:07:45,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 12:07:45,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:45,516 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-02 12:07:46,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:46,157 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 12:07:46,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 12:07:46,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-02 12:07:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:46,158 INFO L225 Difference]: With dead ends: 15 [2018-10-02 12:07:46,158 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 12:07:46,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:07:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 12:07:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 12:07:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 12:07:46,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 12:07:46,163 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-02 12:07:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:46,163 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 12:07:46,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 12:07:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 12:07:46,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 12:07:46,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:46,164 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-02 12:07:46,164 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:46,164 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:46,164 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-10-02 12:07:46,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:46,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:46,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:46,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:46,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:46,176 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:46,176 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:46,176 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:46,199 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:07:46,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 12:07:46,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:46,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:46,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:46,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-02 12:07:46,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 12:07:46,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 12:07:46,511 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:46,511 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-02 12:07:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:47,028 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-02 12:07:47,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 12:07:47,029 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-02 12:07:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:47,030 INFO L225 Difference]: With dead ends: 16 [2018-10-02 12:07:47,030 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 12:07:47,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:07:47,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 12:07:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 12:07:47,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 12:07:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 12:07:47,048 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-02 12:07:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:47,051 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 12:07:47,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 12:07:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 12:07:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 12:07:47,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:47,052 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-02 12:07:47,053 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:47,053 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-10-02 12:07:47,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:47,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:47,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:47,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:47,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:47,064 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:47,065 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:47,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:47,081 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:07:47,096 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:07:47,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:47,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:47,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:47,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-02 12:07:47,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 12:07:47,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 12:07:47,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:47,261 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-02 12:07:48,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:48,110 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 12:07:48,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 12:07:48,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-02 12:07:48,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:48,111 INFO L225 Difference]: With dead ends: 17 [2018-10-02 12:07:48,111 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 12:07:48,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime [2018-10-02 12:07:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 12:07:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 12:07:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 12:07:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 12:07:48,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-02 12:07:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:48,116 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 12:07:48,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 12:07:48,116 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 12:07:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 12:07:48,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:48,117 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-02 12:07:48,117 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:48,117 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-10-02 12:07:48,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:48,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:48,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:48,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:48,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:48,129 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:48,129 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:48,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:48,141 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:07:48,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 12:07:48,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:48,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:48,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:48,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-02 12:07:48,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 12:07:48,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 12:07:48,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:48,425 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-02 12:07:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:49,116 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-02 12:07:49,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:07:49,117 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-02 12:07:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:49,118 INFO L225 Difference]: With dead ends: 18 [2018-10-02 12:07:49,118 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 12:07:49,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:07:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 12:07:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 12:07:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 12:07:49,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 12:07:49,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-02 12:07:49,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:49,124 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 12:07:49,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 12:07:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 12:07:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 12:07:49,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:49,124 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-02 12:07:49,125 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:49,125 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-10-02 12:07:49,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:49,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:49,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:49,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:49,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:49,136 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:49,136 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:49,136 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:49,145 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:07:49,168 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 12:07:49,168 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:49,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:49,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:49,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-02 12:07:49,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 12:07:49,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 12:07:49,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:49,404 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-02 12:07:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:50,159 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 12:07:50,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 12:07:50,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-02 12:07:50,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:50,168 INFO L225 Difference]: With dead ends: 19 [2018-10-02 12:07:50,168 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 12:07:50,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:07:50,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 12:07:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 12:07:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 12:07:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 12:07:50,173 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-02 12:07:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:50,173 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 12:07:50,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 12:07:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 12:07:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 12:07:50,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:50,174 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-02 12:07:50,174 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:50,174 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:50,175 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-10-02 12:07:50,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:50,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:50,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:50,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:50,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:50,186 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:50,186 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:50,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:50,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:07:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:07:50,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:50,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:50,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-02 12:07:50,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 12:07:50,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 12:07:50,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:50,472 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-02 12:07:51,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:51,500 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-02 12:07:51,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 12:07:51,500 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-02 12:07:51,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:51,501 INFO L225 Difference]: With dead ends: 20 [2018-10-02 12:07:51,501 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 12:07:51,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:07:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 12:07:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 12:07:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 12:07:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 12:07:51,506 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-02 12:07:51,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:51,506 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 12:07:51,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 12:07:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 12:07:51,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 12:07:51,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:51,507 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-02 12:07:51,508 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:51,508 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-10-02 12:07:51,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:51,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:51,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:51,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:07:51,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:51,519 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:51,519 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:51,519 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:51,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:07:51,559 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:07:51,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:51,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:53,060 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:53,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:53,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-02 12:07:53,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 12:07:53,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 12:07:53,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:53,083 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-02 12:07:54,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:54,278 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 12:07:54,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 12:07:54,278 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-02 12:07:54,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:54,279 INFO L225 Difference]: With dead ends: 21 [2018-10-02 12:07:54,279 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 12:07:54,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime [2018-10-02 12:07:54,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 12:07:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 12:07:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 12:07:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 12:07:54,284 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-02 12:07:54,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:54,284 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 12:07:54,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 12:07:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 12:07:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 12:07:54,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:54,285 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-02 12:07:54,286 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:54,286 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-10-02 12:07:54,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:54,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:54,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:54,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:54,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:54,297 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:54,297 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:54,297 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:54,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:07:54,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 12:07:54,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:54,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:54,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:54,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-02 12:07:54,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 12:07:54,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 12:07:54,866 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:54,866 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-02 12:07:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:56,020 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-02 12:07:56,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 12:07:56,028 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-02 12:07:56,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:56,028 INFO L225 Difference]: With dead ends: 22 [2018-10-02 12:07:56,028 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 12:07:56,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime [2018-10-02 12:07:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 12:07:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 12:07:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 12:07:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 12:07:56,033 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-02 12:07:56,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:56,033 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 12:07:56,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 12:07:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 12:07:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 12:07:56,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:56,034 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-02 12:07:56,035 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:56,035 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:56,035 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-10-02 12:07:56,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:56,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:56,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:56,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:56,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:56,047 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:56,047 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:56,047 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:56,070 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:07:56,097 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:07:56,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:56,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:56,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:56,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-02 12:07:56,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 12:07:56,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 12:07:56,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:56,424 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-02 12:07:57,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:57,617 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 12:07:57,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 12:07:57,619 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-02 12:07:57,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:57,619 INFO L225 Difference]: With dead ends: 23 [2018-10-02 12:07:57,620 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 12:07:57,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime [2018-10-02 12:07:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 12:07:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 12:07:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 12:07:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 12:07:57,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-02 12:07:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:57,623 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 12:07:57,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 12:07:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 12:07:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 12:07:57,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:57,624 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-02 12:07:57,624 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:57,624 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-10-02 12:07:57,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:57,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:57,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:57,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:57,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:57,635 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:57,636 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:57,636 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:57,657 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:07:57,690 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 12:07:57,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:57,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:07:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:07:58,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:07:58,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-02 12:07:58,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 12:07:58,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 12:07:58,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:07:58,423 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-02 12:07:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:07:59,845 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-02 12:07:59,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 12:07:59,850 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-02 12:07:59,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:07:59,850 INFO L225 Difference]: With dead ends: 24 [2018-10-02 12:07:59,851 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 12:07:59,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime [2018-10-02 12:07:59,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 12:07:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 12:07:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 12:07:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 12:07:59,855 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-02 12:07:59,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:07:59,855 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 12:07:59,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 12:07:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 12:07:59,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 12:07:59,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:07:59,856 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-02 12:07:59,857 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:07:59,857 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:07:59,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-10-02 12:07:59,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:07:59,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:07:59,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:59,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:07:59,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:07:59,866 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:07:59,867 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:07:59,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:07:59,891 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:07:59,935 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-02 12:07:59,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:07:59,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:00,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:00,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-02 12:08:00,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 12:08:00,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 12:08:00,288 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:00,289 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-02 12:08:01,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:01,788 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 12:08:01,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 12:08:01,789 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-02 12:08:01,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:01,790 INFO L225 Difference]: With dead ends: 25 [2018-10-02 12:08:01,790 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 12:08:01,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:08:01,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 12:08:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 12:08:01,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 12:08:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 12:08:01,795 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-02 12:08:01,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:01,796 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 12:08:01,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 12:08:01,796 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 12:08:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 12:08:01,796 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:01,797 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-02 12:08:01,797 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:01,797 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-10-02 12:08:01,797 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:01,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:01,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:01,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:01,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:01,807 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:01,807 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:01,807 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:01,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:01,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:02,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:02,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-02 12:08:02,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 12:08:02,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 12:08:02,245 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:02,245 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-02 12:08:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:04,060 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-02 12:08:04,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 12:08:04,061 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-02 12:08:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:04,062 INFO L225 Difference]: With dead ends: 26 [2018-10-02 12:08:04,062 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 12:08:04,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:08:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 12:08:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 12:08:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 12:08:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 12:08:04,067 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-02 12:08:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:04,067 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 12:08:04,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 12:08:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 12:08:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 12:08:04,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:04,068 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-02 12:08:04,068 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:04,069 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-10-02 12:08:04,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:04,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:04,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:04,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:04,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:04,078 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:04,078 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:04,078 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:04,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:04,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:04,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:04,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:04,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:04,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-02 12:08:04,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 12:08:04,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 12:08:04,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:04,526 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-02 12:08:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:06,356 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 12:08:06,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 12:08:06,357 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-02 12:08:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:06,358 INFO L225 Difference]: With dead ends: 27 [2018-10-02 12:08:06,358 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 12:08:06,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:08:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 12:08:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 12:08:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 12:08:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 12:08:06,364 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-02 12:08:06,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:06,364 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 12:08:06,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 12:08:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 12:08:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 12:08:06,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:06,365 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-02 12:08:06,366 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:06,366 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-10-02 12:08:06,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:06,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:06,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:06,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:06,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:06,374 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:06,374 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:06,374 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:06,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:06,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 12:08:06,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:06,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:06,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:06,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-02 12:08:06,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 12:08:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 12:08:06,932 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:06,932 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-02 12:08:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:09,148 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-02 12:08:09,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 12:08:09,151 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-02 12:08:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:09,152 INFO L225 Difference]: With dead ends: 28 [2018-10-02 12:08:09,152 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 12:08:09,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime [2018-10-02 12:08:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 12:08:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 12:08:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 12:08:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 12:08:09,156 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-02 12:08:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:09,157 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 12:08:09,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 12:08:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 12:08:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 12:08:09,158 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:09,158 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-02 12:08:09,158 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:09,158 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:09,158 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-10-02 12:08:09,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:09,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:09,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:09,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:09,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:09,166 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:09,167 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:09,167 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:09,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:09,220 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:09,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:09,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:09,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:09,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-02 12:08:09,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 12:08:09,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 12:08:09,687 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:09,687 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-02 12:08:12,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:12,122 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 12:08:12,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 12:08:12,122 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-02 12:08:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:12,122 INFO L225 Difference]: With dead ends: 29 [2018-10-02 12:08:12,122 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 12:08:12,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime [2018-10-02 12:08:12,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 12:08:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 12:08:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 12:08:12,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 12:08:12,128 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-02 12:08:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:12,128 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 12:08:12,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 12:08:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 12:08:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 12:08:12,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:12,129 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-02 12:08:12,129 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:12,129 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-10-02 12:08:12,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:12,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:12,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:12,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:12,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:12,138 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:12,138 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:12,138 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:12,157 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:12,203 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 12:08:12,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:12,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:12,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:12,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-02 12:08:12,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 12:08:12,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 12:08:12,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:12,784 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-02 12:08:15,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:15,406 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-02 12:08:15,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 12:08:15,406 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-02 12:08:15,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:15,407 INFO L225 Difference]: With dead ends: 30 [2018-10-02 12:08:15,407 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 12:08:15,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime [2018-10-02 12:08:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 12:08:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 12:08:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 12:08:15,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 12:08:15,413 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-02 12:08:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:15,413 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 12:08:15,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 12:08:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 12:08:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 12:08:15,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:15,414 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-02 12:08:15,414 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:15,415 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:15,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-10-02 12:08:15,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:15,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:15,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:15,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:15,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:15,424 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:15,424 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:15,424 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:15,457 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:15,516 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 12:08:15,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:15,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:16,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:16,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-02 12:08:16,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 12:08:16,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 12:08:16,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:16,026 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-02 12:08:18,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:18,718 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 12:08:18,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 12:08:18,719 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-02 12:08:18,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:18,719 INFO L225 Difference]: With dead ends: 31 [2018-10-02 12:08:18,719 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 12:08:18,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime [2018-10-02 12:08:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 12:08:18,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 12:08:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 12:08:18,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 12:08:18,724 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-02 12:08:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:18,724 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 12:08:18,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 12:08:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 12:08:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 12:08:18,725 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:18,725 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-02 12:08:18,725 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:18,725 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:18,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-10-02 12:08:18,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:18,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:18,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:18,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:18,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:18,734 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:18,734 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:18,735 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:18,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:18,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:19,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:19,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-02 12:08:19,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 12:08:19,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 12:08:19,413 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:19,413 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-02 12:08:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:22,226 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-02 12:08:22,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 12:08:22,227 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-02 12:08:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:22,227 INFO L225 Difference]: With dead ends: 32 [2018-10-02 12:08:22,227 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 12:08:22,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime [2018-10-02 12:08:22,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 12:08:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 12:08:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 12:08:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 12:08:22,233 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-02 12:08:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:22,233 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 12:08:22,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 12:08:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 12:08:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 12:08:22,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:22,234 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-02 12:08:22,235 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:22,235 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:22,235 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-10-02 12:08:22,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:22,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:22,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:22,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:22,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:22,242 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:22,242 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:22,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:22,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:22,299 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:22,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:22,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:22,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:22,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-02 12:08:22,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 12:08:22,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 12:08:22,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:22,883 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-02 12:08:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:26,191 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 12:08:26,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 12:08:26,192 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-02 12:08:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:26,192 INFO L225 Difference]: With dead ends: 33 [2018-10-02 12:08:26,192 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 12:08:26,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime [2018-10-02 12:08:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 12:08:26,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 12:08:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 12:08:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 12:08:26,198 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-02 12:08:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:26,198 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 12:08:26,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 12:08:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 12:08:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 12:08:26,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:26,199 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-02 12:08:26,199 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:26,199 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-10-02 12:08:26,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:26,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:26,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:26,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:26,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:26,210 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:26,210 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:26,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:26,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:26,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 12:08:26,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:26,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:27,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:27,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-02 12:08:27,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 12:08:27,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 12:08:27,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:27,111 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-02 12:08:30,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:30,614 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-02 12:08:30,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 12:08:30,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-02 12:08:30,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:30,616 INFO L225 Difference]: With dead ends: 34 [2018-10-02 12:08:30,616 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 12:08:30,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime [2018-10-02 12:08:30,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 12:08:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 12:08:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 12:08:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 12:08:30,622 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-02 12:08:30,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:30,622 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 12:08:30,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 12:08:30,622 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 12:08:30,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 12:08:30,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:30,623 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-02 12:08:30,623 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:30,623 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:30,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-10-02 12:08:30,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:30,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:30,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:30,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:30,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:30,632 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:30,632 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:30,632 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:30,652 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:08:30,696 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:08:30,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:30,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:31,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:31,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-02 12:08:31,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 12:08:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 12:08:31,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:31,332 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-02 12:08:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:35,029 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 12:08:35,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 12:08:35,030 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-02 12:08:35,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:35,031 INFO L225 Difference]: With dead ends: 35 [2018-10-02 12:08:35,031 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 12:08:35,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime [2018-10-02 12:08:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 12:08:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 12:08:35,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 12:08:35,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 12:08:35,037 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-02 12:08:35,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:35,037 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 12:08:35,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 12:08:35,039 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 12:08:35,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 12:08:35,040 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:35,040 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-02 12:08:35,040 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:35,040 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:35,040 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-10-02 12:08:35,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:35,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:35,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:35,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:35,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:35,048 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:35,049 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:35,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:35,062 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:08:35,115 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 12:08:35,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:35,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:35,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:35,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-02 12:08:35,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 12:08:35,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 12:08:35,740 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:35,740 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-02 12:08:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:39,875 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-02 12:08:39,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 12:08:39,875 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-02 12:08:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:39,876 INFO L225 Difference]: With dead ends: 36 [2018-10-02 12:08:39,876 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 12:08:39,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.5s impTime [2018-10-02 12:08:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 12:08:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 12:08:39,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 12:08:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 12:08:39,881 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-02 12:08:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:39,881 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 12:08:39,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 12:08:39,881 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 12:08:39,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 12:08:39,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:39,882 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-02 12:08:39,882 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:39,882 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:39,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-10-02 12:08:39,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:39,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:39,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:39,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:39,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:39,889 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:39,889 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:39,889 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:39,917 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:08:40,102 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 12:08:40,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:40,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:41,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:41,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-02 12:08:41,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 12:08:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 12:08:41,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:41,476 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-02 12:08:45,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:45,594 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 12:08:45,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 12:08:45,595 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-02 12:08:45,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:45,595 INFO L225 Difference]: With dead ends: 37 [2018-10-02 12:08:45,596 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 12:08:45,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime [2018-10-02 12:08:45,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 12:08:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 12:08:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 12:08:45,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 12:08:45,601 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-02 12:08:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:45,601 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 12:08:45,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 12:08:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 12:08:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 12:08:45,601 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:45,601 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-02 12:08:45,602 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:45,602 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-10-02 12:08:45,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:45,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:45,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:45,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:45,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:45,609 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:45,609 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:45,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-02 12:08:45,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:08:45,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:46,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:46,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-02 12:08:46,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 12:08:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 12:08:46,545 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:46,545 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-02 12:08:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:51,087 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-02 12:08:51,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 12:08:51,088 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-02 12:08:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:51,088 INFO L225 Difference]: With dead ends: 38 [2018-10-02 12:08:51,088 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 12:08:51,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime [2018-10-02 12:08:51,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 12:08:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 12:08:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 12:08:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 12:08:51,096 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-02 12:08:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:51,096 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 12:08:51,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 12:08:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 12:08:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 12:08:51,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:51,097 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-02 12:08:51,097 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:51,098 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:51,098 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-10-02 12:08:51,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:51,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:51,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:51,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:08:51,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:51,110 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:51,110 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:51,110 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:51,121 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:08:51,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:08:51,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:51,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:51,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:51,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-02 12:08:51,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 12:08:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 12:08:51,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:51,899 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-02 12:08:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:08:56,849 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 12:08:56,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 12:08:56,850 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-02 12:08:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:08:56,850 INFO L225 Difference]: With dead ends: 39 [2018-10-02 12:08:56,850 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 12:08:56,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.6s impTime [2018-10-02 12:08:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 12:08:56,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 12:08:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 12:08:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 12:08:56,855 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-02 12:08:56,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:08:56,855 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 12:08:56,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 12:08:56,856 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 12:08:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 12:08:56,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:08:56,856 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-02 12:08:56,856 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:08:56,856 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:08:56,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-10-02 12:08:56,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:08:56,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:08:56,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:56,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:08:56,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:08:56,863 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:08:56,863 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:08:56,863 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:08:56,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:08:57,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 12:08:57,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:08:57,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:08:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:08:58,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:08:58,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-02 12:08:58,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 12:08:58,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 12:08:58,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:08:58,282 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-02 12:09:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:03,554 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-02 12:09:03,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 12:09:03,554 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-02 12:09:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:03,555 INFO L225 Difference]: With dead ends: 40 [2018-10-02 12:09:03,555 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 12:09:03,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.6s impTime [2018-10-02 12:09:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 12:09:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 12:09:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 12:09:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 12:09:03,559 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-02 12:09:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:03,560 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 12:09:03,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 12:09:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 12:09:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 12:09:03,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:03,560 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-02 12:09:03,560 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:03,560 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:03,560 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-10-02 12:09:03,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:03,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:03,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:03,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:03,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:03,568 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:09:03,568 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:09:03,568 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 (exit command is (exit), workingDir is null) [2018-10-02 12:09:03,584 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:09:03,639 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:03,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:03,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:04,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:09:04,483 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-02 12:09:04,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 12:09:04,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 12:09:04,484 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:04,484 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-02 12:09:10,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:10,029 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 12:09:10,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 12:09:10,030 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-02 12:09:10,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:10,030 INFO L225 Difference]: With dead ends: 41 [2018-10-02 12:09:10,031 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 12:09:10,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.7s impTime [2018-10-02 12:09:10,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 12:09:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 12:09:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 12:09:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 12:09:10,035 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-02 12:09:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:10,035 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 12:09:10,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 12:09:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 12:09:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 12:09:10,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:10,036 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-02 12:09:10,036 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:10,036 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-10-02 12:09:10,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:10,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:10,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:10,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:10,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:10,046 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:09:10,046 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:09:10,046 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 (exit command is (exit), workingDir is null) [2018-10-02 12:09:10,056 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:09:10,127 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 12:09:10,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:10,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:11,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:09:11,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-02 12:09:11,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 12:09:11,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 12:09:11,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:11,068 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-02 12:09:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:16,802 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-02 12:09:16,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 12:09:16,803 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-02 12:09:16,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:16,803 INFO L225 Difference]: With dead ends: 42 [2018-10-02 12:09:16,803 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 12:09:16,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.7s impTime [2018-10-02 12:09:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 12:09:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 12:09:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 12:09:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 12:09:16,806 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-02 12:09:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:16,807 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 12:09:16,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 12:09:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 12:09:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 12:09:16,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:16,807 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-02 12:09:16,807 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:16,807 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:16,807 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-10-02 12:09:16,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:16,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:16,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:16,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:16,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:16,813 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:09:16,814 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:09:16,814 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:09:16,822 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:09:17,027 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 12:09:17,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:17,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:17,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:09:17,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-02 12:09:17,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 12:09:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 12:09:17,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:17,948 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-02 12:09:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:23,819 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 12:09:23,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 12:09:23,819 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-02 12:09:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:23,820 INFO L225 Difference]: With dead ends: 43 [2018-10-02 12:09:23,820 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 12:09:23,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.8s impTime [2018-10-02 12:09:23,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 12:09:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 12:09:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 12:09:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 12:09:23,824 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-02 12:09:23,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:23,824 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 12:09:23,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 12:09:23,824 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 12:09:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 12:09:23,825 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:23,825 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-02 12:09:23,825 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:23,825 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-10-02 12:09:23,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:23,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:23,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:23,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:23,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:23,832 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:09:23,833 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:09:23,833 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:09:23,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:09:23,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:24,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:09:24,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-02 12:09:24,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 12:09:24,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 12:09:24,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:24,833 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-02 12:09:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:31,092 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-02 12:09:31,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 12:09:31,092 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-02 12:09:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:31,093 INFO L225 Difference]: With dead ends: 44 [2018-10-02 12:09:31,093 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 12:09:31,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.8s impTime [2018-10-02 12:09:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 12:09:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 12:09:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 12:09:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 12:09:31,098 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-02 12:09:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:31,098 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 12:09:31,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 12:09:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 12:09:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 12:09:31,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:31,099 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-02 12:09:31,099 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:31,099 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:31,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-10-02 12:09:31,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:31,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:31,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:31,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:09:31,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:31,107 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:09:31,107 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:09:31,107 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:09:31,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:09:31,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:09:31,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:31,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:32,884 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:09:32,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-02 12:09:32,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 12:09:32,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 12:09:32,885 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:32,885 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-02 12:09:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:39,301 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 12:09:39,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 12:09:39,301 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-02 12:09:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:39,302 INFO L225 Difference]: With dead ends: 45 [2018-10-02 12:09:39,302 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 12:09:39,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.5s impTime [2018-10-02 12:09:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 12:09:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 12:09:39,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 12:09:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 12:09:39,307 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-02 12:09:39,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:39,307 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 12:09:39,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 12:09:39,307 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 12:09:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 12:09:39,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:39,307 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-02 12:09:39,307 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:39,308 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-10-02 12:09:39,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:39,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:39,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:39,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:39,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:39,314 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:09:39,314 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:09:39,315 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:09:39,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:09:40,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 12:09:40,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:40,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:42,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:09:42,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-02 12:09:42,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 12:09:42,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 12:09:42,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:42,505 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-02 12:09:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:49,079 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-02 12:09:49,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 12:09:49,080 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-02 12:09:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:49,080 INFO L225 Difference]: With dead ends: 46 [2018-10-02 12:09:49,080 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 12:09:49,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime [2018-10-02 12:09:49,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 12:09:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 12:09:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 12:09:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 12:09:49,084 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-02 12:09:49,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:49,084 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 12:09:49,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 12:09:49,084 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 12:09:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 12:09:49,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:49,085 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-02 12:09:49,085 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:49,085 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-10-02 12:09:49,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:49,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:49,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:49,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:49,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:49,092 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:09:49,092 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:09:49,093 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:09:49,102 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:09:49,197 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:09:49,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:49,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:50,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:09:50,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-02 12:09:50,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 12:09:50,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 12:09:50,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:50,835 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-02 12:09:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:09:57,870 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 12:09:57,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 12:09:57,871 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-02 12:09:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:09:57,872 INFO L225 Difference]: With dead ends: 47 [2018-10-02 12:09:57,872 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 12:09:57,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.3s impTime [2018-10-02 12:09:57,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 12:09:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 12:09:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 12:09:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 12:09:57,874 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-02 12:09:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:09:57,874 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 12:09:57,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 12:09:57,875 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 12:09:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 12:09:57,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:09:57,875 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-02 12:09:57,875 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:09:57,875 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:09:57,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-10-02 12:09:57,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:09:57,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:09:57,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:57,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:09:57,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:09:57,882 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:09:57,882 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:09:57,882 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:09:57,891 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:09:57,980 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 12:09:57,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:09:57,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:09:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:09:59,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:09:59,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-02 12:09:59,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 12:09:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 12:09:59,091 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:09:59,092 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-02 12:10:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:06,708 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-02 12:10:06,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 12:10:06,709 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-02 12:10:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:06,709 INFO L225 Difference]: With dead ends: 48 [2018-10-02 12:10:06,709 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 12:10:06,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.9s impTime [2018-10-02 12:10:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 12:10:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 12:10:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 12:10:06,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 12:10:06,712 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-02 12:10:06,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:06,713 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 12:10:06,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 12:10:06,713 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 12:10:06,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 12:10:06,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:06,714 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-02 12:10:06,714 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:06,714 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:06,714 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-10-02 12:10:06,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:06,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:06,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:06,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:06,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:06,719 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:10:06,720 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:10:06,720 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:10:06,727 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:10:07,201 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-02 12:10:07,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:07,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:09,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:10:09,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-02 12:10:09,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 12:10:09,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 12:10:09,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:09,268 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-02 12:10:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:16,893 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 12:10:16,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 12:10:16,894 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-02 12:10:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:16,894 INFO L225 Difference]: With dead ends: 49 [2018-10-02 12:10:16,894 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 12:10:16,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.7s impTime [2018-10-02 12:10:16,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 12:10:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 12:10:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 12:10:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 12:10:16,898 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-02 12:10:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:16,898 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 12:10:16,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 12:10:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 12:10:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 12:10:16,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:16,899 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-02 12:10:16,899 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:16,899 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:16,899 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-10-02 12:10:16,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:16,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:16,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:16,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:16,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:16,907 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:10:16,907 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:10:16,907 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:10:16,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:10:17,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:18,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:10:18,754 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-02 12:10:18,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 12:10:18,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 12:10:18,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:18,755 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-02 12:10:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:27,059 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-02 12:10:27,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 12:10:27,059 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-02 12:10:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:27,060 INFO L225 Difference]: With dead ends: 50 [2018-10-02 12:10:27,060 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 12:10:27,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime [2018-10-02 12:10:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 12:10:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 12:10:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 12:10:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 12:10:27,065 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-02 12:10:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:27,065 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 12:10:27,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 12:10:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 12:10:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 12:10:27,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:27,066 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-02 12:10:27,066 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:27,066 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:27,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-10-02 12:10:27,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:27,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:27,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:27,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:10:27,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:27,074 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:10:27,074 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:10:27,074 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:10:27,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:10:27,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:10:27,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:27,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:28,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:10:28,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-02 12:10:28,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 12:10:28,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 12:10:28,401 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:28,402 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-02 12:10:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:37,088 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 12:10:37,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 12:10:37,089 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-02 12:10:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:37,089 INFO L225 Difference]: With dead ends: 51 [2018-10-02 12:10:37,089 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 12:10:37,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 1.0s impTime [2018-10-02 12:10:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 12:10:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 12:10:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 12:10:37,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 12:10:37,094 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-02 12:10:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:37,094 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 12:10:37,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 12:10:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 12:10:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 12:10:37,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:37,095 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-02 12:10:37,095 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:37,095 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:37,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-10-02 12:10:37,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:37,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:37,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:37,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:37,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:37,102 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:10:37,103 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:10:37,103 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:10:37,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:10:39,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 12:10:39,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:39,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:41,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:10:41,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-02 12:10:41,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 12:10:41,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 12:10:41,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:41,020 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-02 12:10:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:10:49,787 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-02 12:10:49,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 12:10:49,787 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-02 12:10:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:10:49,788 INFO L225 Difference]: With dead ends: 52 [2018-10-02 12:10:49,788 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 12:10:49,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime [2018-10-02 12:10:49,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 12:10:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 12:10:49,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 12:10:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 12:10:49,793 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-02 12:10:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:10:49,793 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 12:10:49,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 12:10:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 12:10:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 12:10:49,794 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:10:49,794 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-02 12:10:49,794 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:10:49,794 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:10:49,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-10-02 12:10:49,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:10:49,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:10:49,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:49,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:10:49,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:10:49,802 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:10:49,802 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:10:49,802 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:10:49,816 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 12:10:49,902 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 12:10:49,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:10:49,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:10:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:10:51,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:10:51,293 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-02 12:10:51,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 12:10:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 12:10:51,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:10:51,293 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-02 12:11:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:00,408 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 12:11:00,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 12:11:00,408 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-02 12:11:00,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:00,409 INFO L225 Difference]: With dead ends: 53 [2018-10-02 12:11:00,409 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 12:11:00,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime [2018-10-02 12:11:00,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 12:11:00,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 12:11:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 12:11:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 12:11:00,412 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-02 12:11:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:00,413 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 12:11:00,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 12:11:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 12:11:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 12:11:00,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:00,413 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-02 12:11:00,414 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:00,414 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:00,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-10-02 12:11:00,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:00,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:00,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:00,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:00,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:00,421 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:11:00,421 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:11:00,421 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:11:00,436 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 12:11:00,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 12:11:00,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:00,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:01,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:11:01,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-02 12:11:01,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 12:11:01,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 12:11:01,997 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:01,997 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-02 12:11:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:11,532 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-02 12:11:11,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 12:11:11,533 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-02 12:11:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:11,533 INFO L225 Difference]: With dead ends: 54 [2018-10-02 12:11:11,534 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 12:11:11,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.2s impTime [2018-10-02 12:11:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 12:11:11,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 12:11:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 12:11:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 12:11:11,538 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-02 12:11:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:11,538 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 12:11:11,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 12:11:11,538 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 12:11:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 12:11:11,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:11,539 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-02 12:11:11,539 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:11,539 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-10-02 12:11:11,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:11,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:11,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:11,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:11,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:11,546 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:11:11,547 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:11:11,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:11:11,554 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 12:11:12,225 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 12:11:12,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:12,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:13,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:11:13,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-02 12:11:13,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 12:11:13,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 12:11:13,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:13,921 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-02 12:11:24,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:24,128 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 12:11:24,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 12:11:24,129 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-02 12:11:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:24,129 INFO L225 Difference]: With dead ends: 55 [2018-10-02 12:11:24,129 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 12:11:24,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.5s impTime [2018-10-02 12:11:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 12:11:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 12:11:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 12:11:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 12:11:24,133 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-02 12:11:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:24,134 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 12:11:24,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 12:11:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 12:11:24,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 12:11:24,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:24,134 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-02 12:11:24,135 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:24,135 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-10-02 12:11:24,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:24,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:24,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:24,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:24,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:24,142 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:11:24,142 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:11:24,142 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:11:24,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 12:11:24,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:25,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:11:25,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-02 12:11:25,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 12:11:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 12:11:25,729 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:25,729 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-02 12:11:36,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:36,264 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-02 12:11:36,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 12:11:36,265 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-02 12:11:36,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:36,265 INFO L225 Difference]: With dead ends: 56 [2018-10-02 12:11:36,265 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 12:11:36,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.3s impTime [2018-10-02 12:11:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 12:11:36,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 12:11:36,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 12:11:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 12:11:36,270 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-02 12:11:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:36,270 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 12:11:36,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 12:11:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 12:11:36,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 12:11:36,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:36,271 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-02 12:11:36,271 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:36,271 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:36,271 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-10-02 12:11:36,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:36,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:36,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:36,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 12:11:36,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:36,279 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:11:36,279 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:11:36,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:11:36,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 12:11:36,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 12:11:36,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:36,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:38,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:11:38,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-02 12:11:38,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 12:11:38,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 12:11:38,866 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:38,866 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-02 12:11:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 12:11:49,669 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 12:11:49,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 12:11:49,670 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-02 12:11:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 12:11:49,670 INFO L225 Difference]: With dead ends: 57 [2018-10-02 12:11:49,670 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 12:11:49,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.0s impTime [2018-10-02 12:11:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 12:11:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 12:11:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 12:11:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 12:11:49,674 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-02 12:11:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 12:11:49,674 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 12:11:49,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 12:11:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 12:11:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 12:11:49,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 12:11:49,675 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-02 12:11:49,675 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 12:11:49,675 INFO L103 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-02 12:11:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-10-02 12:11:49,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 12:11:49,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 12:11:49,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:49,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 12:11:49,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 12:11:49,684 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-02 12:11:49,684 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-02 12:11:49,684 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-02 12:11:49,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 12:11:54,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 12:11:54,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 12:11:54,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 12:11:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 12:11:55,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-02 12:11:55,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-02 12:11:55,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 12:11:55,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 12:11:55,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-02 12:11:55,718 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. Received shutdown request... [2018-10-02 12:11:57,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 12:11:57,807 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 12:11:57,813 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 12:11:57,813 INFO L202 PluginConnector]: Adding new model gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 12:11:57 BoogieIcfgContainer [2018-10-02 12:11:57,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 12:11:57,814 INFO L168 Benchmark]: Toolchain (without parser) took 257202.97 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -27.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 95.6 MB). Peak memory consumption was 68.3 MB. Max. memory is 7.1 GB. [2018-10-02 12:11:57,816 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:11:57,817 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:11:57,817 INFO L168 Benchmark]: Boogie Preprocessor took 19.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 12:11:57,818 INFO L168 Benchmark]: RCFGBuilder took 327.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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. [2018-10-02 12:11:57,818 INFO L168 Benchmark]: TraceAbstraction took 256812.26 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -27.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.4 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. [2018-10-02 12:11:57,822 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 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.82 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.32 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 327.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 256812.26 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -27.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.4 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 46). Cancelled while BasicCegarLoop was constructing difference of abstraction (55states) and FLOYD_HOARE automaton (currently 14 states, 54 states before enhancement), while ReachableStatesComputation was computing reachable states (12 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 256.7s OverallTime, 52 OverallIterations, 51 TraceHistogramMax, 200.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 154 SDtfs, 0 SDslu, 1326 SDs, 0 SdLazy, 48801 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 80.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1430 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1378 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 51 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 12.7s SatisfiabilityAnalysisTime, 40.3s InterpolantComputationTime, 1482 NumberOfCodeBlocks, 1482 NumberOfCodeBlocksAsserted, 411 NumberOfCheckSat, 1430 ConstructedInterpolants, 0 QuantifiedInterpolants, 353557 SizeOfPredicates, 155 NumberOfNonLiveVariables, 7618 ConjunctsInSsa, 5613 ConjunctsInUnsatCore, 52 InterpolantComputations, 1 PerfectInterpolantSequences, 0/23426 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/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_12-11-57-840.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/gauss_sum.i_3.bplTransformedIcfg_BEv2_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_12-11-57-840.csv Completed graceful shutdown