java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array3_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c17473d-m [2018-02-04 14:51:42,169 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 14:51:42,170 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 14:51:42,181 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 14:51:42,181 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 14:51:42,182 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 14:51:42,183 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 14:51:42,184 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 14:51:42,185 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 14:51:42,185 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 14:51:42,186 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 14:51:42,186 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 14:51:42,186 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 14:51:42,187 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 14:51:42,188 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 14:51:42,189 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 14:51:42,190 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 14:51:42,191 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 14:51:42,192 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 14:51:42,192 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 14:51:42,193 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 14:51:42,196 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-04 14:51:42,197 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-04 14:51:42,197 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-02-04 14:51:42,204 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 14:51:42,204 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 14:51:42,205 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 14:51:42,205 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 14:51:42,205 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 14:51:42,205 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 14:51:42,205 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 14:51:42,205 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 14:51:42,206 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 14:51:42,206 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 14:51:42,206 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 14:51:42,206 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 14:51:42,206 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 14:51:42,206 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 14:51:42,206 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 14:51:42,206 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 14:51:42,206 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 14:51:42,206 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 14:51:42,207 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 14:51:42,207 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 14:51:42,207 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 14:51:42,207 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-04 14:51:42,207 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-04 14:51:42,207 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-04 14:51:42,235 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 14:51:42,245 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 14:51:42,248 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 14:51:42,249 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 14:51:42,249 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 14:51:42,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array3_false-valid-deref.i [2018-02-04 14:51:42,343 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 14:51:42,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 14:51:42,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 14:51:42,345 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 14:51:42,350 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 14:51:42,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 02:51:42" (1/1) ... [2018-02-04 14:51:42,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d9976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42, skipping insertion in model container [2018-02-04 14:51:42,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 02:51:42" (1/1) ... [2018-02-04 14:51:42,365 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 14:51:42,381 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 14:51:42,469 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 14:51:42,477 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 14:51:42,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42 WrapperNode [2018-02-04 14:51:42,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 14:51:42,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 14:51:42,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 14:51:42,481 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 14:51:42,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42" (1/1) ... [2018-02-04 14:51:42,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42" (1/1) ... [2018-02-04 14:51:42,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42" (1/1) ... [2018-02-04 14:51:42,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42" (1/1) ... [2018-02-04 14:51:42,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42" (1/1) ... [2018-02-04 14:51:42,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42" (1/1) ... [2018-02-04 14:51:42,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42" (1/1) ... [2018-02-04 14:51:42,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 14:51:42,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 14:51:42,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 14:51:42,501 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 14:51:42,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42" (1/1) ... No working directory specified, using /home/ultimate/work/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 [2018-02-04 14:51:42,540 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 14:51:42,540 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 14:51:42,540 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-02-04 14:51:42,540 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 14:51:42,540 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-02-04 14:51:42,540 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 14:51:42,541 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-02-04 14:51:42,541 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 14:51:42,541 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 14:51:42,541 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 14:51:42,634 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 14:51:42,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 02:51:42 BoogieIcfgContainer [2018-02-04 14:51:42,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 14:51:42,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 14:51:42,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 14:51:42,636 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 14:51:42,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 02:51:42" (1/3) ... [2018-02-04 14:51:42,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267b717a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 02:51:42, skipping insertion in model container [2018-02-04 14:51:42,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 02:51:42" (2/3) ... [2018-02-04 14:51:42,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267b717a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 02:51:42, skipping insertion in model container [2018-02-04 14:51:42,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 02:51:42" (3/3) ... [2018-02-04 14:51:42,639 INFO L107 eAbstractionObserver]: Analyzing ICFG array3_false-valid-deref.i [2018-02-04 14:51:42,644 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-04 14:51:42,649 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-02-04 14:51:42,677 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 14:51:42,677 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 14:51:42,677 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-04 14:51:42,677 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-04 14:51:42,677 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 14:51:42,678 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 14:51:42,678 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 14:51:42,678 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 14:51:42,679 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 14:51:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-02-04 14:51:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-02-04 14:51:42,693 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:42,693 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:42,694 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:42,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1213833872, now seen corresponding path program 1 times [2018-02-04 14:51:42,697 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:42,698 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:42,730 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:42,730 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:42,730 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:42,757 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-04 14:51:42,815 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 14:51:42,815 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 14:51:42,817 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 14:51:42,825 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 14:51:42,826 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-04 14:51:42,831 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2018-02-04 14:51:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:42,939 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2018-02-04 14:51:42,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 14:51:42,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-02-04 14:51:42,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:42,946 INFO L225 Difference]: With dead ends: 44 [2018-02-04 14:51:42,946 INFO L226 Difference]: Without dead ends: 31 [2018-02-04 14:51:42,947 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-04 14:51:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-02-04 14:51:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-02-04 14:51:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-02-04 14:51:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-02-04 14:51:42,977 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 8 [2018-02-04 14:51:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:42,977 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-02-04 14:51:42,977 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 14:51:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-02-04 14:51:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-02-04 14:51:42,978 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:42,978 INFO L351 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:42,978 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -863334142, now seen corresponding path program 1 times [2018-02-04 14:51:42,978 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:42,978 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:42,979 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:42,979 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:42,979 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:43,039 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-02-04 14:51:43,082 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 14:51:43,083 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-04 14:51:43,084 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 14:51:43,084 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 14:51:43,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-02-04 14:51:43,085 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 5 states. [2018-02-04 14:51:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:43,113 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-02-04 14:51:43,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 14:51:43,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-02-04 14:51:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:43,114 INFO L225 Difference]: With dead ends: 30 [2018-02-04 14:51:43,114 INFO L226 Difference]: Without dead ends: 30 [2018-02-04 14:51:43,117 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-02-04 14:51:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-04 14:51:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-02-04 14:51:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-02-04 14:51:43,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-02-04 14:51:43,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 16 [2018-02-04 14:51:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:43,122 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-02-04 14:51:43,122 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 14:51:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-02-04 14:51:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-02-04 14:51:43,123 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:43,123 INFO L351 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:43,123 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1135364244, now seen corresponding path program 1 times [2018-02-04 14:51:43,123 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:43,123 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:43,124 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,124 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:43,124 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:43,135 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-02-04 14:51:43,178 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:43,178 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:43,184 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:43,199 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-02-04 14:51:43,234 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:43,234 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-02-04 14:51:43,234 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 14:51:43,234 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 14:51:43,235 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-02-04 14:51:43,235 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 5 states. [2018-02-04 14:51:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:43,307 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2018-02-04 14:51:43,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 14:51:43,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-02-04 14:51:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:43,309 INFO L225 Difference]: With dead ends: 44 [2018-02-04 14:51:43,309 INFO L226 Difference]: Without dead ends: 44 [2018-02-04 14:51:43,309 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-02-04 14:51:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-02-04 14:51:43,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2018-02-04 14:51:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-02-04 14:51:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-02-04 14:51:43,313 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-02-04 14:51:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:43,313 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-02-04 14:51:43,313 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 14:51:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-02-04 14:51:43,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-02-04 14:51:43,314 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:43,314 INFO L351 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:43,314 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:43,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1230203493, now seen corresponding path program 2 times [2018-02-04 14:51:43,315 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:43,315 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:43,316 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,316 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:43,316 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:43,328 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-02-04 14:51:43,375 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:43,375 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:43,385 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:51:43,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:51:43,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:43,404 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-02-04 14:51:43,432 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:43,432 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-02-04 14:51:43,433 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-04 14:51:43,433 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-04 14:51:43,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-02-04 14:51:43,433 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 6 states. [2018-02-04 14:51:43,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:43,501 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-02-04 14:51:43,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-04 14:51:43,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-02-04 14:51:43,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:43,502 INFO L225 Difference]: With dead ends: 53 [2018-02-04 14:51:43,502 INFO L226 Difference]: Without dead ends: 53 [2018-02-04 14:51:43,503 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-02-04 14:51:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-02-04 14:51:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2018-02-04 14:51:43,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-02-04 14:51:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-02-04 14:51:43,507 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2018-02-04 14:51:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:43,507 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-02-04 14:51:43,507 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-04 14:51:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-02-04 14:51:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-02-04 14:51:43,509 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:43,509 INFO L351 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:43,509 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:43,510 INFO L82 PathProgramCache]: Analyzing trace with hash 417265886, now seen corresponding path program 3 times [2018-02-04 14:51:43,510 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:43,510 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:43,511 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,511 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:43,511 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:43,523 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-02-04 14:51:43,563 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:43,563 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:43,569 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:51:43,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-02-04 14:51:43,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:43,578 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-02-04 14:51:43,609 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:43,610 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2018-02-04 14:51:43,610 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-04 14:51:43,610 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-04 14:51:43,610 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2018-02-04 14:51:43,611 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2018-02-04 14:51:43,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:43,717 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-02-04 14:51:43,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-04 14:51:43,717 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2018-02-04 14:51:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:43,718 INFO L225 Difference]: With dead ends: 62 [2018-02-04 14:51:43,718 INFO L226 Difference]: Without dead ends: 62 [2018-02-04 14:51:43,718 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-02-04 14:51:43,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-02-04 14:51:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2018-02-04 14:51:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-02-04 14:51:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-02-04 14:51:43,722 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 36 [2018-02-04 14:51:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:43,722 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-02-04 14:51:43,722 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-04 14:51:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-02-04 14:51:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-02-04 14:51:43,722 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:43,722 INFO L351 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:43,723 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:43,723 INFO L82 PathProgramCache]: Analyzing trace with hash 576961419, now seen corresponding path program 4 times [2018-02-04 14:51:43,723 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:43,723 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:43,724 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,724 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:43,724 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:43,734 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-02-04 14:51:43,793 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:43,794 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:43,799 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:51:43,812 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:51:43,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:43,814 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-02-04 14:51:43,840 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:43,841 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-02-04 14:51:43,841 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-04 14:51:43,841 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-04 14:51:43,841 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-02-04 14:51:43,841 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 8 states. [2018-02-04 14:51:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:43,902 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2018-02-04 14:51:43,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-04 14:51:43,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2018-02-04 14:51:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:43,903 INFO L225 Difference]: With dead ends: 71 [2018-02-04 14:51:43,903 INFO L226 Difference]: Without dead ends: 71 [2018-02-04 14:51:43,904 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-02-04 14:51:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-02-04 14:51:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-02-04 14:51:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-02-04 14:51:43,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-02-04 14:51:43,906 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2018-02-04 14:51:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:43,906 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-02-04 14:51:43,906 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-04 14:51:43,907 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-02-04 14:51:43,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-02-04 14:51:43,907 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:43,907 INFO L351 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:43,908 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:43,908 INFO L82 PathProgramCache]: Analyzing trace with hash -194823758, now seen corresponding path program 5 times [2018-02-04 14:51:43,908 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:43,908 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:43,909 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,909 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:43,909 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:43,920 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-02-04 14:51:43,980 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:43,981 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:43,986 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:51:44,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-02-04 14:51:44,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:44,020 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-02-04 14:51:44,055 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:44,055 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-02-04 14:51:44,056 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-04 14:51:44,056 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-04 14:51:44,056 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-02-04 14:51:44,056 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 9 states. [2018-02-04 14:51:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:44,148 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2018-02-04 14:51:44,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-04 14:51:44,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2018-02-04 14:51:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:44,150 INFO L225 Difference]: With dead ends: 80 [2018-02-04 14:51:44,151 INFO L226 Difference]: Without dead ends: 80 [2018-02-04 14:51:44,151 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-02-04 14:51:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-02-04 14:51:44,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2018-02-04 14:51:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-02-04 14:51:44,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-02-04 14:51:44,155 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2018-02-04 14:51:44,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:44,156 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-02-04 14:51:44,156 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-04 14:51:44,156 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-02-04 14:51:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-02-04 14:51:44,157 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:44,157 INFO L351 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:44,157 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1600566183, now seen corresponding path program 6 times [2018-02-04 14:51:44,157 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:44,157 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:44,158 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:44,158 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:44,158 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:44,168 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-02-04 14:51:44,229 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:44,229 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:44,239 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:51:44,258 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-02-04 14:51:44,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:44,259 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2018-02-04 14:51:44,301 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:44,301 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2018-02-04 14:51:44,301 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-02-04 14:51:44,302 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-02-04 14:51:44,302 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2018-02-04 14:51:44,302 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 12 states. [2018-02-04 14:51:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:44,399 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-02-04 14:51:44,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-02-04 14:51:44,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2018-02-04 14:51:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:44,400 INFO L225 Difference]: With dead ends: 89 [2018-02-04 14:51:44,400 INFO L226 Difference]: Without dead ends: 89 [2018-02-04 14:51:44,400 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-02-04 14:51:44,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-02-04 14:51:44,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2018-02-04 14:51:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-02-04 14:51:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-02-04 14:51:44,403 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2018-02-04 14:51:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:44,403 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-02-04 14:51:44,403 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-02-04 14:51:44,403 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-02-04 14:51:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-02-04 14:51:44,403 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:44,403 INFO L351 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:44,403 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:44,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1495641218, now seen corresponding path program 7 times [2018-02-04 14:51:44,404 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:44,404 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:44,404 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:44,404 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:44,404 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:44,414 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-02-04 14:51:44,481 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:44,481 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:44,486 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:44,499 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-02-04 14:51:44,528 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:44,528 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-02-04 14:51:44,529 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-02-04 14:51:44,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-02-04 14:51:44,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-02-04 14:51:44,529 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 11 states. [2018-02-04 14:51:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:44,593 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2018-02-04 14:51:44,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-02-04 14:51:44,593 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2018-02-04 14:51:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:44,594 INFO L225 Difference]: With dead ends: 98 [2018-02-04 14:51:44,594 INFO L226 Difference]: Without dead ends: 98 [2018-02-04 14:51:44,594 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-02-04 14:51:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-02-04 14:51:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 67. [2018-02-04 14:51:44,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-02-04 14:51:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-02-04 14:51:44,597 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-02-04 14:51:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:44,598 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-02-04 14:51:44,598 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-02-04 14:51:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-02-04 14:51:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-02-04 14:51:44,598 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:44,598 INFO L351 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:44,598 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:44,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1534369477, now seen corresponding path program 8 times [2018-02-04 14:51:44,599 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:44,599 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:44,599 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:44,599 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:44,599 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:44,607 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-02-04 14:51:44,678 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:44,678 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:44,683 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:51:44,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:51:44,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:44,700 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-02-04 14:51:44,728 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:44,728 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-02-04 14:51:44,729 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-02-04 14:51:44,729 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-02-04 14:51:44,729 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-02-04 14:51:44,729 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 12 states. [2018-02-04 14:51:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:44,814 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-02-04 14:51:44,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-04 14:51:44,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2018-02-04 14:51:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:44,815 INFO L225 Difference]: With dead ends: 107 [2018-02-04 14:51:44,815 INFO L226 Difference]: Without dead ends: 107 [2018-02-04 14:51:44,815 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-02-04 14:51:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-02-04 14:51:44,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2018-02-04 14:51:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-02-04 14:51:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-02-04 14:51:44,819 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2018-02-04 14:51:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:44,819 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-02-04 14:51:44,819 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-02-04 14:51:44,819 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-02-04 14:51:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-02-04 14:51:44,820 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:44,820 INFO L351 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:44,820 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1473900172, now seen corresponding path program 9 times [2018-02-04 14:51:44,821 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:44,821 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:44,821 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:44,821 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:44,821 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:44,829 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2018-02-04 14:51:44,910 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:44,910 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:44,915 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:51:44,925 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-02-04 14:51:44,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:44,927 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2018-02-04 14:51:44,963 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:44,963 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 15 [2018-02-04 14:51:44,963 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-04 14:51:44,963 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-04 14:51:44,963 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=113, Unknown=0, NotChecked=0, Total=210 [2018-02-04 14:51:44,963 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 15 states. [2018-02-04 14:51:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:45,133 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-02-04 14:51:45,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-04 14:51:45,134 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2018-02-04 14:51:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:45,134 INFO L225 Difference]: With dead ends: 116 [2018-02-04 14:51:45,135 INFO L226 Difference]: Without dead ends: 116 [2018-02-04 14:51:45,135 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=189, Unknown=0, NotChecked=0, Total=342 [2018-02-04 14:51:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-02-04 14:51:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-02-04 14:51:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-02-04 14:51:45,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-02-04 14:51:45,139 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 70 [2018-02-04 14:51:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:45,140 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-02-04 14:51:45,140 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-04 14:51:45,140 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-02-04 14:51:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-02-04 14:51:45,141 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:45,141 INFO L351 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:45,143 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1757583627, now seen corresponding path program 10 times [2018-02-04 14:51:45,143 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:45,143 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:45,144 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:45,144 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:45,144 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:45,153 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-02-04 14:51:45,259 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:45,259 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:45,264 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:51:45,275 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:51:45,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:45,278 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 242 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-02-04 14:51:45,308 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:45,308 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-02-04 14:51:45,308 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-02-04 14:51:45,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-02-04 14:51:45,309 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-02-04 14:51:45,309 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 14 states. [2018-02-04 14:51:45,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:45,367 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2018-02-04 14:51:45,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-04 14:51:45,368 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2018-02-04 14:51:45,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:45,368 INFO L225 Difference]: With dead ends: 125 [2018-02-04 14:51:45,368 INFO L226 Difference]: Without dead ends: 125 [2018-02-04 14:51:45,368 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-02-04 14:51:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-02-04 14:51:45,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2018-02-04 14:51:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-02-04 14:51:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-02-04 14:51:45,371 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2018-02-04 14:51:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:45,371 INFO L432 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-02-04 14:51:45,371 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-02-04 14:51:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-02-04 14:51:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-02-04 14:51:45,372 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:45,372 INFO L351 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:45,372 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:45,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2099078308, now seen corresponding path program 11 times [2018-02-04 14:51:45,372 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:45,372 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:45,372 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:45,373 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:45,373 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:45,380 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:45,476 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-02-04 14:51:45,476 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:45,476 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:45,481 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:51:45,503 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-02-04 14:51:45,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:45,505 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-02-04 14:51:45,536 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:45,536 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-02-04 14:51:45,536 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-04 14:51:45,536 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-04 14:51:45,537 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-02-04 14:51:45,537 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 15 states. [2018-02-04 14:51:45,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:45,601 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2018-02-04 14:51:45,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-02-04 14:51:45,601 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2018-02-04 14:51:45,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:45,602 INFO L225 Difference]: With dead ends: 134 [2018-02-04 14:51:45,602 INFO L226 Difference]: Without dead ends: 134 [2018-02-04 14:51:45,602 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-02-04 14:51:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-02-04 14:51:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 88. [2018-02-04 14:51:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-02-04 14:51:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-02-04 14:51:45,605 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2018-02-04 14:51:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:45,606 INFO L432 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-02-04 14:51:45,606 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-04 14:51:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-02-04 14:51:45,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-02-04 14:51:45,607 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:45,607 INFO L351 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:45,607 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:45,607 INFO L82 PathProgramCache]: Analyzing trace with hash -159824829, now seen corresponding path program 12 times [2018-02-04 14:51:45,607 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:45,607 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:45,608 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:45,608 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:45,608 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:45,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:45,616 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 338 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-02-04 14:51:45,744 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:45,744 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:45,751 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:51:45,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-02-04 14:51:45,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:45,769 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2018-02-04 14:51:45,815 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:45,816 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 18 [2018-02-04 14:51:45,816 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-02-04 14:51:45,816 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-02-04 14:51:45,816 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=163, Unknown=0, NotChecked=0, Total=306 [2018-02-04 14:51:45,816 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 18 states. [2018-02-04 14:51:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:45,940 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2018-02-04 14:51:45,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-02-04 14:51:45,941 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2018-02-04 14:51:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:45,941 INFO L225 Difference]: With dead ends: 143 [2018-02-04 14:51:45,941 INFO L226 Difference]: Without dead ends: 143 [2018-02-04 14:51:45,942 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=278, Unknown=0, NotChecked=0, Total=506 [2018-02-04 14:51:45,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-02-04 14:51:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 97. [2018-02-04 14:51:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-02-04 14:51:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-02-04 14:51:45,944 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 87 [2018-02-04 14:51:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:45,944 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-02-04 14:51:45,944 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-02-04 14:51:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-02-04 14:51:45,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-02-04 14:51:45,945 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:45,945 INFO L351 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:45,945 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2110093160, now seen corresponding path program 13 times [2018-02-04 14:51:45,945 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:45,945 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:45,946 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:45,946 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:45,946 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:45,952 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-02-04 14:51:46,053 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:46,053 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:46,058 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:46,074 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-02-04 14:51:46,108 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:46,108 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-02-04 14:51:46,108 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-02-04 14:51:46,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-02-04 14:51:46,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-02-04 14:51:46,109 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 17 states. [2018-02-04 14:51:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:46,192 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2018-02-04 14:51:46,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-02-04 14:51:46,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2018-02-04 14:51:46,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:46,192 INFO L225 Difference]: With dead ends: 152 [2018-02-04 14:51:46,193 INFO L226 Difference]: Without dead ends: 152 [2018-02-04 14:51:46,193 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-02-04 14:51:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-02-04 14:51:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2018-02-04 14:51:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-02-04 14:51:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-02-04 14:51:46,196 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2018-02-04 14:51:46,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:46,196 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-02-04 14:51:46,196 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-02-04 14:51:46,196 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-02-04 14:51:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-02-04 14:51:46,197 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:46,198 INFO L351 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:46,198 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:46,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1842728721, now seen corresponding path program 14 times [2018-02-04 14:51:46,198 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:46,198 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:46,199 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:46,199 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:46,199 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:46,207 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-02-04 14:51:46,315 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:46,315 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:46,320 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:51:46,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:51:46,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:46,333 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-02-04 14:51:46,361 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:46,361 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-02-04 14:51:46,361 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-02-04 14:51:46,361 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-02-04 14:51:46,362 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-02-04 14:51:46,362 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 18 states. [2018-02-04 14:51:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:46,442 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2018-02-04 14:51:46,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-02-04 14:51:46,442 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 100 [2018-02-04 14:51:46,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:46,443 INFO L225 Difference]: With dead ends: 161 [2018-02-04 14:51:46,443 INFO L226 Difference]: Without dead ends: 161 [2018-02-04 14:51:46,443 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-02-04 14:51:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-02-04 14:51:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 105. [2018-02-04 14:51:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-02-04 14:51:46,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-02-04 14:51:46,446 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-02-04 14:51:46,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:46,446 INFO L432 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-02-04 14:51:46,446 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-02-04 14:51:46,447 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-02-04 14:51:46,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-02-04 14:51:46,447 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:46,448 INFO L351 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:46,448 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:46,448 INFO L82 PathProgramCache]: Analyzing trace with hash -184078070, now seen corresponding path program 15 times [2018-02-04 14:51:46,448 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:46,448 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:46,449 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:46,449 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:46,449 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:46,458 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-02-04 14:51:46,604 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:46,604 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:46,609 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:51:46,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-02-04 14:51:46,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:46,646 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:46,683 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2018-02-04 14:51:46,715 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:46,715 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 21 [2018-02-04 14:51:46,715 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-02-04 14:51:46,716 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-02-04 14:51:46,716 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=222, Unknown=0, NotChecked=0, Total=420 [2018-02-04 14:51:46,716 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 21 states. [2018-02-04 14:51:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:46,846 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2018-02-04 14:51:46,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-02-04 14:51:46,959 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2018-02-04 14:51:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:46,959 INFO L225 Difference]: With dead ends: 170 [2018-02-04 14:51:46,959 INFO L226 Difference]: Without dead ends: 170 [2018-02-04 14:51:46,960 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=318, Invalid=384, Unknown=0, NotChecked=0, Total=702 [2018-02-04 14:51:46,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-02-04 14:51:46,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 114. [2018-02-04 14:51:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-02-04 14:51:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-02-04 14:51:46,962 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 104 [2018-02-04 14:51:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:46,963 INFO L432 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-02-04 14:51:46,963 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-02-04 14:51:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-02-04 14:51:46,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-02-04 14:51:46,963 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:46,963 INFO L351 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:46,963 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:46,964 INFO L82 PathProgramCache]: Analyzing trace with hash 950262623, now seen corresponding path program 16 times [2018-02-04 14:51:46,964 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:46,964 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:46,964 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:46,964 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:46,964 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:46,973 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-02-04 14:51:47,104 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:47,105 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:47,109 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:51:47,122 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:51:47,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:47,124 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 578 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-02-04 14:51:47,155 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:47,156 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-02-04 14:51:47,156 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-02-04 14:51:47,156 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-02-04 14:51:47,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-02-04 14:51:47,156 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 20 states. [2018-02-04 14:51:47,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:47,243 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2018-02-04 14:51:47,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-02-04 14:51:47,243 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2018-02-04 14:51:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:47,244 INFO L225 Difference]: With dead ends: 179 [2018-02-04 14:51:47,244 INFO L226 Difference]: Without dead ends: 179 [2018-02-04 14:51:47,244 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-02-04 14:51:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-02-04 14:51:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 118. [2018-02-04 14:51:47,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-02-04 14:51:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-02-04 14:51:47,247 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2018-02-04 14:51:47,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:47,247 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-02-04 14:51:47,247 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-02-04 14:51:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-02-04 14:51:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-02-04 14:51:47,248 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:47,248 INFO L351 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:47,248 INFO L371 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1664169478, now seen corresponding path program 17 times [2018-02-04 14:51:47,249 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:47,249 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:47,249 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:47,249 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:47,250 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:47,258 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-02-04 14:51:47,417 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:47,417 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:47,422 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:51:47,466 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-02-04 14:51:47,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:47,469 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-02-04 14:51:47,519 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:47,519 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-02-04 14:51:47,521 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-02-04 14:51:47,521 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-02-04 14:51:47,521 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-02-04 14:51:47,521 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 21 states. [2018-02-04 14:51:47,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:47,647 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2018-02-04 14:51:47,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-02-04 14:51:47,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 117 [2018-02-04 14:51:47,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:47,648 INFO L225 Difference]: With dead ends: 188 [2018-02-04 14:51:47,648 INFO L226 Difference]: Without dead ends: 188 [2018-02-04 14:51:47,648 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-02-04 14:51:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-02-04 14:51:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2018-02-04 14:51:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-02-04 14:51:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-02-04 14:51:47,651 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 117 [2018-02-04 14:51:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:47,651 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-02-04 14:51:47,651 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-02-04 14:51:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-02-04 14:51:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-02-04 14:51:47,652 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:47,652 INFO L351 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:47,652 INFO L371 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:47,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2092098861, now seen corresponding path program 18 times [2018-02-04 14:51:47,652 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:47,652 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:47,653 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:47,653 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:47,653 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:47,661 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2018-02-04 14:51:47,803 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:47,803 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:47,808 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:51:47,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-02-04 14:51:47,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:47,831 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2018-02-04 14:51:47,867 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:47,867 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 24 [2018-02-04 14:51:47,867 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-02-04 14:51:47,867 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-02-04 14:51:47,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=290, Unknown=0, NotChecked=0, Total=552 [2018-02-04 14:51:47,867 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 24 states. [2018-02-04 14:51:48,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:48,057 INFO L93 Difference]: Finished difference Result 197 states and 209 transitions. [2018-02-04 14:51:48,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-02-04 14:51:48,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2018-02-04 14:51:48,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:48,058 INFO L225 Difference]: With dead ends: 197 [2018-02-04 14:51:48,058 INFO L226 Difference]: Without dead ends: 197 [2018-02-04 14:51:48,059 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=423, Invalid=507, Unknown=0, NotChecked=0, Total=930 [2018-02-04 14:51:48,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-02-04 14:51:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 131. [2018-02-04 14:51:48,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-02-04 14:51:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-02-04 14:51:48,061 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 121 [2018-02-04 14:51:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:48,062 INFO L432 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-02-04 14:51:48,062 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-02-04 14:51:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-02-04 14:51:48,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-02-04 14:51:48,062 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:48,062 INFO L351 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:48,062 INFO L371 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:48,063 INFO L82 PathProgramCache]: Analyzing trace with hash 734718894, now seen corresponding path program 19 times [2018-02-04 14:51:48,063 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:48,063 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:48,064 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:48,064 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:48,064 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:48,074 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-02-04 14:51:48,221 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:48,221 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:48,226 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:48,241 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-02-04 14:51:48,285 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:48,285 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-02-04 14:51:48,286 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-02-04 14:51:48,286 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-02-04 14:51:48,286 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-02-04 14:51:48,286 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 23 states. [2018-02-04 14:51:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:48,383 INFO L93 Difference]: Finished difference Result 206 states and 219 transitions. [2018-02-04 14:51:48,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-02-04 14:51:48,383 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2018-02-04 14:51:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:48,384 INFO L225 Difference]: With dead ends: 206 [2018-02-04 14:51:48,384 INFO L226 Difference]: Without dead ends: 206 [2018-02-04 14:51:48,384 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-02-04 14:51:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-02-04 14:51:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 135. [2018-02-04 14:51:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-02-04 14:51:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-02-04 14:51:48,386 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2018-02-04 14:51:48,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:48,386 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-02-04 14:51:48,386 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-02-04 14:51:48,386 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-02-04 14:51:48,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-02-04 14:51:48,386 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:48,386 INFO L351 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:48,387 INFO L371 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:48,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1367823335, now seen corresponding path program 20 times [2018-02-04 14:51:48,387 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:48,387 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:48,387 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:48,387 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:48,388 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:48,396 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-02-04 14:51:48,551 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:48,551 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:48,556 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:51:48,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:51:48,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:48,573 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 882 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-02-04 14:51:48,603 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:48,604 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-02-04 14:51:48,604 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-02-04 14:51:48,604 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-02-04 14:51:48,604 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-02-04 14:51:48,604 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 24 states. [2018-02-04 14:51:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:48,711 INFO L93 Difference]: Finished difference Result 215 states and 229 transitions. [2018-02-04 14:51:48,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-02-04 14:51:48,711 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 134 [2018-02-04 14:51:48,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:48,712 INFO L225 Difference]: With dead ends: 215 [2018-02-04 14:51:48,712 INFO L226 Difference]: Without dead ends: 215 [2018-02-04 14:51:48,712 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-02-04 14:51:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-02-04 14:51:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 139. [2018-02-04 14:51:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-02-04 14:51:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-02-04 14:51:48,715 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-02-04 14:51:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:48,715 INFO L432 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-02-04 14:51:48,715 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-02-04 14:51:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-02-04 14:51:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-02-04 14:51:48,716 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:48,716 INFO L351 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:48,716 INFO L371 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:48,716 INFO L82 PathProgramCache]: Analyzing trace with hash -168626272, now seen corresponding path program 21 times [2018-02-04 14:51:48,716 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:48,716 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:48,717 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:48,717 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:48,717 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:48,727 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2018-02-04 14:51:48,952 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:48,952 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:48,957 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:51:48,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-02-04 14:51:48,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:48,972 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2018-02-04 14:51:49,008 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:49,008 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11] total 27 [2018-02-04 14:51:49,008 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-02-04 14:51:49,009 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-02-04 14:51:49,009 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=367, Unknown=0, NotChecked=0, Total=702 [2018-02-04 14:51:49,009 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 27 states. [2018-02-04 14:51:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:49,168 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2018-02-04 14:51:49,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-02-04 14:51:49,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 138 [2018-02-04 14:51:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:49,169 INFO L225 Difference]: With dead ends: 224 [2018-02-04 14:51:49,169 INFO L226 Difference]: Without dead ends: 224 [2018-02-04 14:51:49,169 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=543, Invalid=647, Unknown=0, NotChecked=0, Total=1190 [2018-02-04 14:51:49,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-02-04 14:51:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2018-02-04 14:51:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-02-04 14:51:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-02-04 14:51:49,171 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 138 [2018-02-04 14:51:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:49,172 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-02-04 14:51:49,172 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-02-04 14:51:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-02-04 14:51:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-02-04 14:51:49,173 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:49,173 INFO L351 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:49,173 INFO L371 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash -219252535, now seen corresponding path program 22 times [2018-02-04 14:51:49,173 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:49,173 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:49,174 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:49,174 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:49,174 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:49,184 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-02-04 14:51:49,435 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:49,435 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:49,440 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:51:49,456 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:51:49,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:49,457 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 0 proven. 1058 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-02-04 14:51:49,489 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:49,489 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-02-04 14:51:49,489 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-02-04 14:51:49,489 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-02-04 14:51:49,490 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-02-04 14:51:49,490 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 26 states. [2018-02-04 14:51:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:49,612 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2018-02-04 14:51:49,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-02-04 14:51:49,612 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 147 [2018-02-04 14:51:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:49,613 INFO L225 Difference]: With dead ends: 233 [2018-02-04 14:51:49,613 INFO L226 Difference]: Without dead ends: 233 [2018-02-04 14:51:49,613 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-02-04 14:51:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-02-04 14:51:49,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 152. [2018-02-04 14:51:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-02-04 14:51:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2018-02-04 14:51:49,615 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2018-02-04 14:51:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:49,615 INFO L432 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2018-02-04 14:51:49,615 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-02-04 14:51:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2018-02-04 14:51:49,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-02-04 14:51:49,616 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:49,616 INFO L351 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:49,616 INFO L371 AbstractCegarLoop]: === Iteration 25 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2062915152, now seen corresponding path program 23 times [2018-02-04 14:51:49,616 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:49,616 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:49,617 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:49,617 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:49,617 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:49,624 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-02-04 14:51:49,880 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:49,880 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:49,885 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:51:49,969 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-02-04 14:51:49,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:49,971 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1152 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-02-04 14:51:50,003 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:50,003 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-02-04 14:51:50,003 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-02-04 14:51:50,003 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-02-04 14:51:50,003 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-02-04 14:51:50,003 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 27 states. [2018-02-04 14:51:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:50,184 INFO L93 Difference]: Finished difference Result 242 states and 258 transitions. [2018-02-04 14:51:50,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-02-04 14:51:50,185 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 151 [2018-02-04 14:51:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:50,185 INFO L225 Difference]: With dead ends: 242 [2018-02-04 14:51:50,185 INFO L226 Difference]: Without dead ends: 242 [2018-02-04 14:51:50,186 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-02-04 14:51:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-02-04 14:51:50,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 156. [2018-02-04 14:51:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-02-04 14:51:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-02-04 14:51:50,188 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 151 [2018-02-04 14:51:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:50,188 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-02-04 14:51:50,188 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-02-04 14:51:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-02-04 14:51:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-02-04 14:51:50,189 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:50,189 INFO L351 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:50,189 INFO L371 AbstractCegarLoop]: === Iteration 26 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash -731541737, now seen corresponding path program 24 times [2018-02-04 14:51:50,190 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:50,190 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:50,190 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:50,190 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:50,190 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:50,200 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 0 proven. 1250 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-02-04 14:51:50,522 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:50,522 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:50,529 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:51:50,581 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-02-04 14:51:50,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:50,583 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1448 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2018-02-04 14:51:50,655 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:50,655 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 12] total 30 [2018-02-04 14:51:50,656 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-02-04 14:51:50,656 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-02-04 14:51:50,656 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=453, Unknown=0, NotChecked=0, Total=870 [2018-02-04 14:51:50,656 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 30 states. [2018-02-04 14:51:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:50,914 INFO L93 Difference]: Finished difference Result 251 states and 267 transitions. [2018-02-04 14:51:50,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-02-04 14:51:50,914 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 155 [2018-02-04 14:51:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:50,914 INFO L225 Difference]: With dead ends: 251 [2018-02-04 14:51:50,915 INFO L226 Difference]: Without dead ends: 251 [2018-02-04 14:51:50,915 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=804, Unknown=0, NotChecked=0, Total=1482 [2018-02-04 14:51:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-02-04 14:51:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2018-02-04 14:51:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-02-04 14:51:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-02-04 14:51:50,917 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 155 [2018-02-04 14:51:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:50,918 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-02-04 14:51:50,918 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-02-04 14:51:50,918 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-02-04 14:51:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-02-04 14:51:50,918 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:50,918 INFO L351 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:50,918 INFO L371 AbstractCegarLoop]: === Iteration 27 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:50,919 INFO L82 PathProgramCache]: Analyzing trace with hash 7304644, now seen corresponding path program 25 times [2018-02-04 14:51:50,919 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:50,919 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:50,919 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:50,919 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:50,919 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:50,925 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-02-04 14:51:51,179 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:51,179 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:51,189 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:51,225 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-02-04 14:51:51,294 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:51,294 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-02-04 14:51:51,294 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-02-04 14:51:51,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-02-04 14:51:51,295 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-02-04 14:51:51,295 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 29 states. [2018-02-04 14:51:51,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:51,452 INFO L93 Difference]: Finished difference Result 260 states and 277 transitions. [2018-02-04 14:51:51,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-02-04 14:51:51,452 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 164 [2018-02-04 14:51:51,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:51,453 INFO L225 Difference]: With dead ends: 260 [2018-02-04 14:51:51,453 INFO L226 Difference]: Without dead ends: 260 [2018-02-04 14:51:51,454 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-02-04 14:51:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-02-04 14:51:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2018-02-04 14:51:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-02-04 14:51:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-02-04 14:51:51,457 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-02-04 14:51:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:51,457 INFO L432 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-02-04 14:51:51,457 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-02-04 14:51:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-02-04 14:51:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-02-04 14:51:51,458 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:51,458 INFO L351 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:51,458 INFO L371 AbstractCegarLoop]: === Iteration 28 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1420521539, now seen corresponding path program 26 times [2018-02-04 14:51:51,459 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:51,459 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:51,459 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:51,459 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:51,459 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:51,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:51,469 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1458 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-02-04 14:51:51,841 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:51,841 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:51,849 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:51:51,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:51:51,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:51,886 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 1458 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-02-04 14:51:51,947 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:51,947 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-02-04 14:51:51,948 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-02-04 14:51:51,948 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-02-04 14:51:51,948 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-02-04 14:51:51,948 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 30 states. [2018-02-04 14:51:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:52,172 INFO L93 Difference]: Finished difference Result 269 states and 287 transitions. [2018-02-04 14:51:52,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-02-04 14:51:52,173 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 168 [2018-02-04 14:51:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:52,174 INFO L225 Difference]: With dead ends: 269 [2018-02-04 14:51:52,174 INFO L226 Difference]: Without dead ends: 269 [2018-02-04 14:51:52,174 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-02-04 14:51:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-02-04 14:51:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 173. [2018-02-04 14:51:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-02-04 14:51:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-02-04 14:51:52,177 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 168 [2018-02-04 14:51:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:52,178 INFO L432 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-02-04 14:51:52,178 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-02-04 14:51:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-02-04 14:51:52,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-02-04 14:51:52,178 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:52,179 INFO L351 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:52,179 INFO L371 AbstractCegarLoop]: === Iteration 29 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:52,179 INFO L82 PathProgramCache]: Analyzing trace with hash -910555850, now seen corresponding path program 27 times [2018-02-04 14:51:52,179 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:52,179 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:52,180 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:52,180 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:52,180 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:52,189 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1813 backedges. 0 proven. 1568 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2018-02-04 14:51:52,579 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:52,579 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:52,585 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:51:52,626 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-02-04 14:51:52,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:52,629 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1813 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2018-02-04 14:51:52,683 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:52,683 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13] total 33 [2018-02-04 14:51:52,683 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-02-04 14:51:52,684 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-02-04 14:51:52,684 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=548, Unknown=0, NotChecked=0, Total=1056 [2018-02-04 14:51:52,684 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 33 states. [2018-02-04 14:51:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:52,966 INFO L93 Difference]: Finished difference Result 278 states and 296 transitions. [2018-02-04 14:51:52,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-02-04 14:51:52,966 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 172 [2018-02-04 14:51:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:52,967 INFO L225 Difference]: With dead ends: 278 [2018-02-04 14:51:52,967 INFO L226 Difference]: Without dead ends: 278 [2018-02-04 14:51:52,968 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=828, Invalid=978, Unknown=0, NotChecked=0, Total=1806 [2018-02-04 14:51:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-02-04 14:51:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 182. [2018-02-04 14:51:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-02-04 14:51:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2018-02-04 14:51:52,971 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 172 [2018-02-04 14:51:52,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:52,971 INFO L432 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2018-02-04 14:51:52,971 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-02-04 14:51:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2018-02-04 14:51:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-02-04 14:51:52,972 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:52,972 INFO L351 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:52,972 INFO L371 AbstractCegarLoop]: === Iteration 30 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:52,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1830068019, now seen corresponding path program 28 times [2018-02-04 14:51:52,973 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:52,973 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:52,973 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:52,974 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:52,974 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:52,983 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1979 backedges. 0 proven. 1682 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-02-04 14:51:53,409 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:53,409 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:53,414 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:51:53,441 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:51:53,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:53,443 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1979 backedges. 0 proven. 1682 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-02-04 14:51:53,477 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:53,477 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-02-04 14:51:53,477 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-02-04 14:51:53,478 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-02-04 14:51:53,478 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-02-04 14:51:53,478 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 32 states. [2018-02-04 14:51:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:53,679 INFO L93 Difference]: Finished difference Result 287 states and 306 transitions. [2018-02-04 14:51:53,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-02-04 14:51:53,679 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 181 [2018-02-04 14:51:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:53,680 INFO L225 Difference]: With dead ends: 287 [2018-02-04 14:51:53,680 INFO L226 Difference]: Without dead ends: 287 [2018-02-04 14:51:53,680 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-02-04 14:51:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-02-04 14:51:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 186. [2018-02-04 14:51:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-02-04 14:51:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-02-04 14:51:53,682 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 181 [2018-02-04 14:51:53,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:53,682 INFO L432 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-02-04 14:51:53,682 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-02-04 14:51:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-02-04 14:51:53,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-02-04 14:51:53,683 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:53,683 INFO L351 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:53,683 INFO L371 AbstractCegarLoop]: === Iteration 31 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:53,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1177971110, now seen corresponding path program 29 times [2018-02-04 14:51:53,683 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:53,683 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:53,684 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:53,684 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:53,684 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:53,690 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2097 backedges. 0 proven. 1800 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-02-04 14:51:54,044 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:54,044 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:54,052 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:51:54,220 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-02-04 14:51:54,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:54,223 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2097 backedges. 0 proven. 1800 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-02-04 14:51:54,278 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:54,278 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-02-04 14:51:54,278 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-02-04 14:51:54,278 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-02-04 14:51:54,279 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-02-04 14:51:54,279 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 33 states. [2018-02-04 14:51:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:54,422 INFO L93 Difference]: Finished difference Result 296 states and 316 transitions. [2018-02-04 14:51:54,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-02-04 14:51:54,423 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 185 [2018-02-04 14:51:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:54,423 INFO L225 Difference]: With dead ends: 296 [2018-02-04 14:51:54,423 INFO L226 Difference]: Without dead ends: 296 [2018-02-04 14:51:54,424 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-02-04 14:51:54,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2018-02-04 14:51:54,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 190. [2018-02-04 14:51:54,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-02-04 14:51:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-02-04 14:51:54,426 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2018-02-04 14:51:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:54,426 INFO L432 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-02-04 14:51:54,426 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-02-04 14:51:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-02-04 14:51:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-02-04 14:51:54,431 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:54,431 INFO L351 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:54,431 INFO L371 AbstractCegarLoop]: === Iteration 32 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:54,432 INFO L82 PathProgramCache]: Analyzing trace with hash 659595777, now seen corresponding path program 30 times [2018-02-04 14:51:54,432 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:54,432 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:54,432 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:54,432 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:54,432 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:54,447 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 1922 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-02-04 14:51:54,811 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:54,811 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:54,816 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:51:54,864 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-02-04 14:51:54,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:54,866 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2219 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2018-02-04 14:51:54,916 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:54,917 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 14] total 36 [2018-02-04 14:51:54,917 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-02-04 14:51:54,917 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-02-04 14:51:54,917 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=652, Unknown=0, NotChecked=0, Total=1260 [2018-02-04 14:51:54,917 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 36 states. [2018-02-04 14:51:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:55,184 INFO L93 Difference]: Finished difference Result 305 states and 325 transitions. [2018-02-04 14:51:55,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-02-04 14:51:55,184 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 189 [2018-02-04 14:51:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:55,185 INFO L225 Difference]: With dead ends: 305 [2018-02-04 14:51:55,185 INFO L226 Difference]: Without dead ends: 305 [2018-02-04 14:51:55,185 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=993, Invalid=1169, Unknown=0, NotChecked=0, Total=2162 [2018-02-04 14:51:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-02-04 14:51:55,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 199. [2018-02-04 14:51:55,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-02-04 14:51:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-02-04 14:51:55,187 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 189 [2018-02-04 14:51:55,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:55,187 INFO L432 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-02-04 14:51:55,187 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-02-04 14:51:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-02-04 14:51:55,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-02-04 14:51:55,188 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:55,188 INFO L351 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:55,188 INFO L371 AbstractCegarLoop]: === Iteration 33 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1088370982, now seen corresponding path program 31 times [2018-02-04 14:51:55,188 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:55,188 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:55,189 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:55,189 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:55,189 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:55,195 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2402 backedges. 0 proven. 2048 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-02-04 14:51:55,535 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:55,535 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:55,540 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:55,560 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2402 backedges. 0 proven. 2048 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-02-04 14:51:55,597 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:55,598 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-02-04 14:51:55,598 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-02-04 14:51:55,598 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-02-04 14:51:55,599 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-02-04 14:51:55,599 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 35 states. [2018-02-04 14:51:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:55,805 INFO L93 Difference]: Finished difference Result 314 states and 335 transitions. [2018-02-04 14:51:55,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-02-04 14:51:55,805 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 198 [2018-02-04 14:51:55,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:55,807 INFO L225 Difference]: With dead ends: 314 [2018-02-04 14:51:55,807 INFO L226 Difference]: Without dead ends: 314 [2018-02-04 14:51:55,807 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-02-04 14:51:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-02-04 14:51:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 203. [2018-02-04 14:51:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-02-04 14:51:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-02-04 14:51:55,810 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2018-02-04 14:51:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:55,810 INFO L432 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-02-04 14:51:55,810 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-02-04 14:51:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-02-04 14:51:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-02-04 14:51:55,811 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:55,811 INFO L351 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:55,811 INFO L371 AbstractCegarLoop]: === Iteration 34 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:55,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1538121069, now seen corresponding path program 32 times [2018-02-04 14:51:55,812 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:55,812 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:55,812 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:55,813 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:51:55,813 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:55,823 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 0 proven. 2178 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-02-04 14:51:56,292 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:56,292 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:56,297 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:51:56,334 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:51:56,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:56,337 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2532 backedges. 0 proven. 2178 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-02-04 14:51:56,388 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:56,388 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-02-04 14:51:56,388 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-02-04 14:51:56,389 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-02-04 14:51:56,389 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-02-04 14:51:56,389 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 36 states. [2018-02-04 14:51:56,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:56,664 INFO L93 Difference]: Finished difference Result 323 states and 345 transitions. [2018-02-04 14:51:56,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-02-04 14:51:56,664 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 202 [2018-02-04 14:51:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:56,665 INFO L225 Difference]: With dead ends: 323 [2018-02-04 14:51:56,666 INFO L226 Difference]: Without dead ends: 323 [2018-02-04 14:51:56,666 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-02-04 14:51:56,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-02-04 14:51:56,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 207. [2018-02-04 14:51:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-02-04 14:51:56,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-02-04 14:51:56,669 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2018-02-04 14:51:56,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:56,669 INFO L432 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-02-04 14:51:56,669 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-02-04 14:51:56,669 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-02-04 14:51:56,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-02-04 14:51:56,670 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:56,670 INFO L351 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:56,670 INFO L371 AbstractCegarLoop]: === Iteration 35 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:56,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1785923124, now seen corresponding path program 33 times [2018-02-04 14:51:56,671 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:56,671 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:56,671 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:56,672 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:56,672 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:56,681 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2666 backedges. 0 proven. 2312 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2018-02-04 14:51:57,187 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:57,187 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:57,192 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:51:57,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-02-04 14:51:57,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:57,232 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:57,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2666 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2018-02-04 14:51:57,277 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:57,277 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 15] total 39 [2018-02-04 14:51:57,277 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-02-04 14:51:57,277 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-02-04 14:51:57,278 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=765, Unknown=0, NotChecked=0, Total=1482 [2018-02-04 14:51:57,278 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 39 states. [2018-02-04 14:51:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:57,563 INFO L93 Difference]: Finished difference Result 332 states and 354 transitions. [2018-02-04 14:51:57,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-02-04 14:51:57,563 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 206 [2018-02-04 14:51:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:57,564 INFO L225 Difference]: With dead ends: 332 [2018-02-04 14:51:57,564 INFO L226 Difference]: Without dead ends: 332 [2018-02-04 14:51:57,565 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1173, Invalid=1377, Unknown=0, NotChecked=0, Total=2550 [2018-02-04 14:51:57,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-02-04 14:51:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 216. [2018-02-04 14:51:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-02-04 14:51:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-02-04 14:51:57,567 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 206 [2018-02-04 14:51:57,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:57,567 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-02-04 14:51:57,568 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-02-04 14:51:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-02-04 14:51:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-02-04 14:51:57,568 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:57,569 INFO L351 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:57,569 INFO L371 AbstractCegarLoop]: === Iteration 36 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:57,569 INFO L82 PathProgramCache]: Analyzing trace with hash 716025501, now seen corresponding path program 34 times [2018-02-04 14:51:57,569 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:57,569 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:57,570 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:57,570 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:57,570 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:57,579 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2866 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2018-02-04 14:51:58,075 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:58,075 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:58,080 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:51:58,106 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:51:58,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:58,108 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2866 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2018-02-04 14:51:58,148 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:58,148 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-02-04 14:51:58,148 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-02-04 14:51:58,148 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-02-04 14:51:58,148 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-02-04 14:51:58,149 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 38 states. [2018-02-04 14:51:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:58,323 INFO L93 Difference]: Finished difference Result 341 states and 364 transitions. [2018-02-04 14:51:58,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-02-04 14:51:58,323 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 215 [2018-02-04 14:51:58,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:58,324 INFO L225 Difference]: With dead ends: 341 [2018-02-04 14:51:58,324 INFO L226 Difference]: Without dead ends: 341 [2018-02-04 14:51:58,324 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-02-04 14:51:58,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-02-04 14:51:58,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 220. [2018-02-04 14:51:58,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-02-04 14:51:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-02-04 14:51:58,326 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2018-02-04 14:51:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:58,327 INFO L432 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-02-04 14:51:58,327 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-02-04 14:51:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-02-04 14:51:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-02-04 14:51:58,328 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:58,328 INFO L351 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:58,328 INFO L371 AbstractCegarLoop]: === Iteration 37 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:58,328 INFO L82 PathProgramCache]: Analyzing trace with hash 376052740, now seen corresponding path program 35 times [2018-02-04 14:51:58,328 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:58,328 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:58,329 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:58,329 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:58,329 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:58,335 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3008 backedges. 0 proven. 2592 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2018-02-04 14:51:58,794 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:58,794 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:58,799 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:51:59,062 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-02-04 14:51:59,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:59,065 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3008 backedges. 0 proven. 2592 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2018-02-04 14:51:59,127 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:59,127 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-02-04 14:51:59,127 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-02-04 14:51:59,127 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-02-04 14:51:59,128 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-02-04 14:51:59,128 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 39 states. [2018-02-04 14:51:59,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:51:59,337 INFO L93 Difference]: Finished difference Result 350 states and 374 transitions. [2018-02-04 14:51:59,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-02-04 14:51:59,337 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 219 [2018-02-04 14:51:59,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:51:59,339 INFO L225 Difference]: With dead ends: 350 [2018-02-04 14:51:59,339 INFO L226 Difference]: Without dead ends: 350 [2018-02-04 14:51:59,339 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-02-04 14:51:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-02-04 14:51:59,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 224. [2018-02-04 14:51:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-02-04 14:51:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2018-02-04 14:51:59,342 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 219 [2018-02-04 14:51:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:51:59,343 INFO L432 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2018-02-04 14:51:59,343 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-02-04 14:51:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2018-02-04 14:51:59,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-02-04 14:51:59,344 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:51:59,344 INFO L351 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:51:59,344 INFO L371 AbstractCegarLoop]: === Iteration 38 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:51:59,344 INFO L82 PathProgramCache]: Analyzing trace with hash -908886549, now seen corresponding path program 36 times [2018-02-04 14:51:59,344 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:51:59,344 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:51:59,345 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:59,345 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:51:59,345 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:51:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:51:59,355 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:51:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 2738 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2018-02-04 14:51:59,810 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:51:59,810 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:51:59,814 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:51:59,873 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-02-04 14:51:59,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:51:59,875 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:51:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3154 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2018-02-04 14:51:59,954 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:51:59,954 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 16] total 42 [2018-02-04 14:51:59,954 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-02-04 14:51:59,955 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-02-04 14:51:59,955 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=887, Unknown=0, NotChecked=0, Total=1722 [2018-02-04 14:51:59,956 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 42 states. [2018-02-04 14:52:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:00,257 INFO L93 Difference]: Finished difference Result 359 states and 383 transitions. [2018-02-04 14:52:00,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-02-04 14:52:00,257 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 223 [2018-02-04 14:52:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:00,258 INFO L225 Difference]: With dead ends: 359 [2018-02-04 14:52:00,258 INFO L226 Difference]: Without dead ends: 359 [2018-02-04 14:52:00,258 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1368, Invalid=1602, Unknown=0, NotChecked=0, Total=2970 [2018-02-04 14:52:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-02-04 14:52:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 233. [2018-02-04 14:52:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-02-04 14:52:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2018-02-04 14:52:00,260 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 223 [2018-02-04 14:52:00,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:00,261 INFO L432 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2018-02-04 14:52:00,261 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-02-04 14:52:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2018-02-04 14:52:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-02-04 14:52:00,261 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:00,261 INFO L351 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:00,261 INFO L371 AbstractCegarLoop]: === Iteration 39 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:00,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1724416272, now seen corresponding path program 37 times [2018-02-04 14:52:00,262 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:00,262 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:00,262 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:00,262 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:00,262 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:00,268 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 2888 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2018-02-04 14:52:00,717 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:00,717 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:00,721 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:00,748 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3371 backedges. 0 proven. 2888 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2018-02-04 14:52:00,821 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:00,821 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-02-04 14:52:00,821 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-02-04 14:52:00,822 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-02-04 14:52:00,822 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-02-04 14:52:00,822 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand 41 states. [2018-02-04 14:52:01,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:01,068 INFO L93 Difference]: Finished difference Result 368 states and 393 transitions. [2018-02-04 14:52:01,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-02-04 14:52:01,068 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 232 [2018-02-04 14:52:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:01,069 INFO L225 Difference]: With dead ends: 368 [2018-02-04 14:52:01,069 INFO L226 Difference]: Without dead ends: 368 [2018-02-04 14:52:01,069 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-02-04 14:52:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2018-02-04 14:52:01,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 237. [2018-02-04 14:52:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-02-04 14:52:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2018-02-04 14:52:01,071 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 232 [2018-02-04 14:52:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:01,071 INFO L432 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2018-02-04 14:52:01,071 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-02-04 14:52:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2018-02-04 14:52:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-02-04 14:52:01,071 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:01,072 INFO L351 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:01,072 INFO L371 AbstractCegarLoop]: === Iteration 40 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:01,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1358212201, now seen corresponding path program 38 times [2018-02-04 14:52:01,072 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:01,072 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:01,072 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:01,072 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:01,072 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:01,078 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:01,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3525 backedges. 0 proven. 3042 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2018-02-04 14:52:01,629 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:01,629 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:01,641 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:52:01,695 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:52:01,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:01,698 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3525 backedges. 0 proven. 3042 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2018-02-04 14:52:01,767 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:01,767 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-02-04 14:52:01,767 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-02-04 14:52:01,767 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-02-04 14:52:01,768 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-02-04 14:52:01,768 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 42 states. [2018-02-04 14:52:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:02,016 INFO L93 Difference]: Finished difference Result 377 states and 403 transitions. [2018-02-04 14:52:02,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-02-04 14:52:02,016 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 236 [2018-02-04 14:52:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:02,017 INFO L225 Difference]: With dead ends: 377 [2018-02-04 14:52:02,017 INFO L226 Difference]: Without dead ends: 377 [2018-02-04 14:52:02,018 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-02-04 14:52:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2018-02-04 14:52:02,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 241. [2018-02-04 14:52:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-02-04 14:52:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2018-02-04 14:52:02,019 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 236 [2018-02-04 14:52:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:02,020 INFO L432 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2018-02-04 14:52:02,020 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-02-04 14:52:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2018-02-04 14:52:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-02-04 14:52:02,021 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:02,021 INFO L351 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:02,021 INFO L371 AbstractCegarLoop]: === Iteration 41 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1660712290, now seen corresponding path program 39 times [2018-02-04 14:52:02,021 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:02,021 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:02,022 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:02,022 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:02,022 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:02,030 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3683 backedges. 0 proven. 3200 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2018-02-04 14:52:02,548 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:02,548 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:02,555 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:52:02,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-02-04 14:52:02,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:02,612 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3683 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2018-02-04 14:52:02,694 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:02,694 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 17] total 45 [2018-02-04 14:52:02,694 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-02-04 14:52:02,695 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-02-04 14:52:02,695 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=1018, Unknown=0, NotChecked=0, Total=1980 [2018-02-04 14:52:02,695 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 45 states. [2018-02-04 14:52:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:03,156 INFO L93 Difference]: Finished difference Result 386 states and 412 transitions. [2018-02-04 14:52:03,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-02-04 14:52:03,156 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 240 [2018-02-04 14:52:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:03,157 INFO L225 Difference]: With dead ends: 386 [2018-02-04 14:52:03,157 INFO L226 Difference]: Without dead ends: 386 [2018-02-04 14:52:03,158 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1578, Invalid=1844, Unknown=0, NotChecked=0, Total=3422 [2018-02-04 14:52:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-02-04 14:52:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 250. [2018-02-04 14:52:03,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-02-04 14:52:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-02-04 14:52:03,161 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 240 [2018-02-04 14:52:03,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:03,161 INFO L432 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-02-04 14:52:03,161 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-02-04 14:52:03,161 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-02-04 14:52:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-02-04 14:52:03,162 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:03,162 INFO L351 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:03,162 INFO L371 AbstractCegarLoop]: === Iteration 42 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:03,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1376712953, now seen corresponding path program 40 times [2018-02-04 14:52:03,163 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:03,163 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:03,163 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:03,164 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:03,164 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:03,174 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3917 backedges. 0 proven. 3362 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-02-04 14:52:03,723 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:03,723 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:03,728 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:52:03,762 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:52:03,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:03,765 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3917 backedges. 0 proven. 3362 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-02-04 14:52:03,822 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:03,822 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-02-04 14:52:03,822 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-02-04 14:52:03,822 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-02-04 14:52:03,823 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-02-04 14:52:03,823 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 44 states. [2018-02-04 14:52:04,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:04,039 INFO L93 Difference]: Finished difference Result 395 states and 422 transitions. [2018-02-04 14:52:04,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-02-04 14:52:04,039 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 249 [2018-02-04 14:52:04,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:04,040 INFO L225 Difference]: With dead ends: 395 [2018-02-04 14:52:04,040 INFO L226 Difference]: Without dead ends: 395 [2018-02-04 14:52:04,041 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-02-04 14:52:04,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-02-04 14:52:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 254. [2018-02-04 14:52:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-02-04 14:52:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2018-02-04 14:52:04,043 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 249 [2018-02-04 14:52:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:04,043 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2018-02-04 14:52:04,043 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-02-04 14:52:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2018-02-04 14:52:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-02-04 14:52:04,044 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:04,045 INFO L351 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:04,045 INFO L371 AbstractCegarLoop]: === Iteration 43 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1434933934, now seen corresponding path program 41 times [2018-02-04 14:52:04,045 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:04,045 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:04,045 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:04,046 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:04,046 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:04,056 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4083 backedges. 0 proven. 3528 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-02-04 14:52:04,612 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:04,613 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:04,617 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:52:05,140 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-02-04 14:52:05,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:05,144 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4083 backedges. 0 proven. 3528 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-02-04 14:52:05,232 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:05,233 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-02-04 14:52:05,233 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-02-04 14:52:05,233 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-02-04 14:52:05,233 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-02-04 14:52:05,233 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand 45 states. [2018-02-04 14:52:05,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:05,567 INFO L93 Difference]: Finished difference Result 404 states and 432 transitions. [2018-02-04 14:52:05,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-02-04 14:52:05,568 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 253 [2018-02-04 14:52:05,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:05,569 INFO L225 Difference]: With dead ends: 404 [2018-02-04 14:52:05,569 INFO L226 Difference]: Without dead ends: 404 [2018-02-04 14:52:05,569 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-02-04 14:52:05,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2018-02-04 14:52:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 258. [2018-02-04 14:52:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-02-04 14:52:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-02-04 14:52:05,572 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 253 [2018-02-04 14:52:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:05,572 INFO L432 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-02-04 14:52:05,572 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-02-04 14:52:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-02-04 14:52:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-02-04 14:52:05,573 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:05,573 INFO L351 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:05,573 INFO L371 AbstractCegarLoop]: === Iteration 44 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:05,573 INFO L82 PathProgramCache]: Analyzing trace with hash -588414251, now seen corresponding path program 42 times [2018-02-04 14:52:05,573 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:05,573 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:05,573 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:05,574 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:05,574 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:05,580 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4253 backedges. 0 proven. 3698 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2018-02-04 14:52:06,149 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:06,149 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:06,154 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:52:06,242 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-02-04 14:52:06,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:06,244 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4253 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 3698 trivial. 0 not checked. [2018-02-04 14:52:06,321 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:06,321 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 18] total 48 [2018-02-04 14:52:06,322 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-02-04 14:52:06,322 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-02-04 14:52:06,322 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1098, Invalid=1158, Unknown=0, NotChecked=0, Total=2256 [2018-02-04 14:52:06,322 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 48 states. [2018-02-04 14:52:06,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:06,774 INFO L93 Difference]: Finished difference Result 413 states and 441 transitions. [2018-02-04 14:52:06,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-02-04 14:52:06,775 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 257 [2018-02-04 14:52:06,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:06,776 INFO L225 Difference]: With dead ends: 413 [2018-02-04 14:52:06,776 INFO L226 Difference]: Without dead ends: 413 [2018-02-04 14:52:06,776 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1803, Invalid=2103, Unknown=0, NotChecked=0, Total=3906 [2018-02-04 14:52:06,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2018-02-04 14:52:06,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 267. [2018-02-04 14:52:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-02-04 14:52:06,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-02-04 14:52:06,778 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 257 [2018-02-04 14:52:06,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:06,778 INFO L432 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-02-04 14:52:06,778 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-02-04 14:52:06,778 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-02-04 14:52:06,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-02-04 14:52:06,779 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:06,779 INFO L351 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:06,779 INFO L371 AbstractCegarLoop]: === Iteration 45 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:06,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1871954426, now seen corresponding path program 43 times [2018-02-04 14:52:06,779 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:06,779 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:06,779 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:06,780 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:06,780 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:06,786 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4504 backedges. 0 proven. 3872 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-02-04 14:52:07,415 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:07,415 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:07,420 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:07,449 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4504 backedges. 0 proven. 3872 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-02-04 14:52:07,511 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:07,512 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-02-04 14:52:07,512 INFO L409 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-02-04 14:52:07,512 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-02-04 14:52:07,512 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-02-04 14:52:07,512 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 47 states. [2018-02-04 14:52:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:07,790 INFO L93 Difference]: Finished difference Result 422 states and 451 transitions. [2018-02-04 14:52:07,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-02-04 14:52:07,790 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 266 [2018-02-04 14:52:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:07,791 INFO L225 Difference]: With dead ends: 422 [2018-02-04 14:52:07,791 INFO L226 Difference]: Without dead ends: 422 [2018-02-04 14:52:07,791 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-02-04 14:52:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-02-04 14:52:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 271. [2018-02-04 14:52:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-02-04 14:52:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-02-04 14:52:07,794 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2018-02-04 14:52:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:07,794 INFO L432 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-02-04 14:52:07,794 INFO L433 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-02-04 14:52:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-02-04 14:52:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-02-04 14:52:07,796 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:07,796 INFO L351 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:07,796 INFO L371 AbstractCegarLoop]: === Iteration 46 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:07,796 INFO L82 PathProgramCache]: Analyzing trace with hash -820982465, now seen corresponding path program 44 times [2018-02-04 14:52:07,796 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:07,796 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:07,797 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:07,797 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:07,797 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:07,808 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:08,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 0 proven. 4050 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-02-04 14:52:08,458 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:08,459 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:08,463 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:52:08,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:52:08,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:08,493 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 0 proven. 4050 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-02-04 14:52:08,564 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:08,564 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-02-04 14:52:08,564 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-02-04 14:52:08,564 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-02-04 14:52:08,564 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-02-04 14:52:08,565 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 48 states. [2018-02-04 14:52:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:08,922 INFO L93 Difference]: Finished difference Result 431 states and 461 transitions. [2018-02-04 14:52:08,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-02-04 14:52:08,922 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 270 [2018-02-04 14:52:08,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:08,923 INFO L225 Difference]: With dead ends: 431 [2018-02-04 14:52:08,923 INFO L226 Difference]: Without dead ends: 431 [2018-02-04 14:52:08,923 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-02-04 14:52:08,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-02-04 14:52:08,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 275. [2018-02-04 14:52:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-02-04 14:52:08,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-02-04 14:52:08,925 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270 [2018-02-04 14:52:08,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:08,925 INFO L432 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-02-04 14:52:08,926 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-02-04 14:52:08,926 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-02-04 14:52:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-02-04 14:52:08,926 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:08,926 INFO L351 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:08,926 INFO L371 AbstractCegarLoop]: === Iteration 47 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:08,926 INFO L82 PathProgramCache]: Analyzing trace with hash -34007048, now seen corresponding path program 45 times [2018-02-04 14:52:08,927 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:08,927 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:08,927 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:08,927 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:08,927 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:08,934 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:09,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4864 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked. [2018-02-04 14:52:09,664 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:09,664 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:09,671 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:52:09,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-02-04 14:52:09,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:09,728 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4864 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2018-02-04 14:52:09,784 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:09,784 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 19] total 51 [2018-02-04 14:52:09,785 INFO L409 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-02-04 14:52:09,785 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-02-04 14:52:09,785 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1243, Invalid=1307, Unknown=0, NotChecked=0, Total=2550 [2018-02-04 14:52:09,785 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 51 states. [2018-02-04 14:52:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:10,250 INFO L93 Difference]: Finished difference Result 440 states and 470 transitions. [2018-02-04 14:52:10,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-02-04 14:52:10,250 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 274 [2018-02-04 14:52:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:10,251 INFO L225 Difference]: With dead ends: 440 [2018-02-04 14:52:10,251 INFO L226 Difference]: Without dead ends: 440 [2018-02-04 14:52:10,252 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2043, Invalid=2379, Unknown=0, NotChecked=0, Total=4422 [2018-02-04 14:52:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2018-02-04 14:52:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 284. [2018-02-04 14:52:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-02-04 14:52:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 285 transitions. [2018-02-04 14:52:10,254 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 285 transitions. Word has length 274 [2018-02-04 14:52:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:10,254 INFO L432 AbstractCegarLoop]: Abstraction has 284 states and 285 transitions. [2018-02-04 14:52:10,254 INFO L433 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-02-04 14:52:10,254 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 285 transitions. [2018-02-04 14:52:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-02-04 14:52:10,255 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:10,255 INFO L351 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:10,255 INFO L371 AbstractCegarLoop]: === Iteration 48 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:10,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1716123535, now seen corresponding path program 46 times [2018-02-04 14:52:10,255 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:10,255 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:10,255 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:10,256 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:10,256 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:10,263 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 0 proven. 4418 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-02-04 14:52:10,961 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:10,961 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:10,966 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:52:10,996 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:52:10,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:10,998 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5132 backedges. 0 proven. 4418 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-02-04 14:52:11,059 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:11,059 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-02-04 14:52:11,059 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-02-04 14:52:11,059 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-02-04 14:52:11,059 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-02-04 14:52:11,059 INFO L87 Difference]: Start difference. First operand 284 states and 285 transitions. Second operand 50 states. [2018-02-04 14:52:11,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:11,400 INFO L93 Difference]: Finished difference Result 449 states and 480 transitions. [2018-02-04 14:52:11,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-02-04 14:52:11,400 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 283 [2018-02-04 14:52:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:11,401 INFO L225 Difference]: With dead ends: 449 [2018-02-04 14:52:11,401 INFO L226 Difference]: Without dead ends: 449 [2018-02-04 14:52:11,402 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-02-04 14:52:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2018-02-04 14:52:11,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 288. [2018-02-04 14:52:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-02-04 14:52:11,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2018-02-04 14:52:11,405 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 283 [2018-02-04 14:52:11,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:11,405 INFO L432 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2018-02-04 14:52:11,405 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-02-04 14:52:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2018-02-04 14:52:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-02-04 14:52:11,406 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:11,406 INFO L351 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:11,406 INFO L371 AbstractCegarLoop]: === Iteration 49 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:11,406 INFO L82 PathProgramCache]: Analyzing trace with hash 962376280, now seen corresponding path program 47 times [2018-02-04 14:52:11,406 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:11,407 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:11,407 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:11,407 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:11,407 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:11,414 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 0 proven. 4608 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-02-04 14:52:12,125 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:12,125 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:12,130 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:52:12,879 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-02-04 14:52:12,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:12,883 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 0 proven. 4608 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-02-04 14:52:12,943 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:12,944 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-02-04 14:52:12,944 INFO L409 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-02-04 14:52:12,944 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-02-04 14:52:12,944 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-02-04 14:52:12,944 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand 51 states. [2018-02-04 14:52:13,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:13,262 INFO L93 Difference]: Finished difference Result 458 states and 490 transitions. [2018-02-04 14:52:13,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-02-04 14:52:13,262 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 287 [2018-02-04 14:52:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:13,263 INFO L225 Difference]: With dead ends: 458 [2018-02-04 14:52:13,263 INFO L226 Difference]: Without dead ends: 458 [2018-02-04 14:52:13,264 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-02-04 14:52:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-02-04 14:52:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 292. [2018-02-04 14:52:13,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-02-04 14:52:13,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2018-02-04 14:52:13,267 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 287 [2018-02-04 14:52:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:13,267 INFO L432 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2018-02-04 14:52:13,267 INFO L433 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-02-04 14:52:13,268 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2018-02-04 14:52:13,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-02-04 14:52:13,269 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:13,269 INFO L351 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:13,269 INFO L371 AbstractCegarLoop]: === Iteration 50 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:13,269 INFO L82 PathProgramCache]: Analyzing trace with hash -264367937, now seen corresponding path program 48 times [2018-02-04 14:52:13,269 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:13,269 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:13,270 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:13,270 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:13,270 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:13,283 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:14,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5516 backedges. 0 proven. 4802 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-02-04 14:52:14,006 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:14,006 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:14,011 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:52:14,135 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-02-04 14:52:14,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:14,137 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5516 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 4802 trivial. 0 not checked. [2018-02-04 14:52:14,195 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:14,195 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 20] total 54 [2018-02-04 14:52:14,196 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-02-04 14:52:14,196 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-02-04 14:52:14,196 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1397, Invalid=1465, Unknown=0, NotChecked=0, Total=2862 [2018-02-04 14:52:14,196 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand 54 states. [2018-02-04 14:52:14,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:14,674 INFO L93 Difference]: Finished difference Result 467 states and 499 transitions. [2018-02-04 14:52:14,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-02-04 14:52:14,674 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 291 [2018-02-04 14:52:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:14,675 INFO L225 Difference]: With dead ends: 467 [2018-02-04 14:52:14,675 INFO L226 Difference]: Without dead ends: 467 [2018-02-04 14:52:14,675 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=2298, Invalid=2672, Unknown=0, NotChecked=0, Total=4970 [2018-02-04 14:52:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2018-02-04 14:52:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 301. [2018-02-04 14:52:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-02-04 14:52:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2018-02-04 14:52:14,677 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 291 [2018-02-04 14:52:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:14,678 INFO L432 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2018-02-04 14:52:14,678 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-02-04 14:52:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2018-02-04 14:52:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-02-04 14:52:14,678 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:14,679 INFO L351 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:14,679 INFO L371 AbstractCegarLoop]: === Iteration 51 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:14,679 INFO L82 PathProgramCache]: Analyzing trace with hash -724065252, now seen corresponding path program 49 times [2018-02-04 14:52:14,679 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:14,679 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:14,679 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:14,679 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:14,679 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:14,687 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5801 backedges. 0 proven. 5000 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2018-02-04 14:52:15,473 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:15,473 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:15,478 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:15,517 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5801 backedges. 0 proven. 5000 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2018-02-04 14:52:15,574 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:15,574 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-02-04 14:52:15,574 INFO L409 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-02-04 14:52:15,574 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-02-04 14:52:15,575 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-02-04 14:52:15,575 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand 53 states. [2018-02-04 14:52:15,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:15,953 INFO L93 Difference]: Finished difference Result 476 states and 509 transitions. [2018-02-04 14:52:15,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-02-04 14:52:15,953 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 300 [2018-02-04 14:52:15,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:15,954 INFO L225 Difference]: With dead ends: 476 [2018-02-04 14:52:15,954 INFO L226 Difference]: Without dead ends: 476 [2018-02-04 14:52:15,954 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-02-04 14:52:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2018-02-04 14:52:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 305. [2018-02-04 14:52:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-02-04 14:52:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2018-02-04 14:52:15,956 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 300 [2018-02-04 14:52:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:15,957 INFO L432 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2018-02-04 14:52:15,957 INFO L433 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-02-04 14:52:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2018-02-04 14:52:15,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-02-04 14:52:15,958 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:15,958 INFO L351 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:15,958 INFO L371 AbstractCegarLoop]: === Iteration 52 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1675306261, now seen corresponding path program 50 times [2018-02-04 14:52:15,958 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:15,958 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:15,958 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:15,958 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:15,958 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:15,966 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6003 backedges. 0 proven. 5202 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2018-02-04 14:52:16,773 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:16,773 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:16,778 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:52:16,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:52:16,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:16,812 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6003 backedges. 0 proven. 5202 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2018-02-04 14:52:16,866 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:16,866 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-02-04 14:52:16,867 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-02-04 14:52:16,867 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-02-04 14:52:16,867 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-02-04 14:52:16,867 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand 54 states. [2018-02-04 14:52:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:17,207 INFO L93 Difference]: Finished difference Result 485 states and 519 transitions. [2018-02-04 14:52:17,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-02-04 14:52:17,207 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 304 [2018-02-04 14:52:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:17,208 INFO L225 Difference]: With dead ends: 485 [2018-02-04 14:52:17,208 INFO L226 Difference]: Without dead ends: 485 [2018-02-04 14:52:17,208 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-02-04 14:52:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2018-02-04 14:52:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 309. [2018-02-04 14:52:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-02-04 14:52:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2018-02-04 14:52:17,210 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 304 [2018-02-04 14:52:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:17,210 INFO L432 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2018-02-04 14:52:17,210 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-02-04 14:52:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2018-02-04 14:52:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-02-04 14:52:17,211 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:17,211 INFO L351 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:17,211 INFO L371 AbstractCegarLoop]: === Iteration 53 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash -757890674, now seen corresponding path program 51 times [2018-02-04 14:52:17,211 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:17,211 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:17,212 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:17,212 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:17,212 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:17,219 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6209 backedges. 0 proven. 5408 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2018-02-04 14:52:18,048 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:18,048 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:18,053 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:52:18,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-02-04 14:52:18,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:18,114 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6209 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2018-02-04 14:52:18,173 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:18,174 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 21] total 57 [2018-02-04 14:52:18,174 INFO L409 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-02-04 14:52:18,174 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-02-04 14:52:18,174 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1560, Invalid=1632, Unknown=0, NotChecked=0, Total=3192 [2018-02-04 14:52:18,175 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand 57 states. [2018-02-04 14:52:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:18,770 INFO L93 Difference]: Finished difference Result 494 states and 528 transitions. [2018-02-04 14:52:18,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-02-04 14:52:18,770 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 308 [2018-02-04 14:52:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:18,771 INFO L225 Difference]: With dead ends: 494 [2018-02-04 14:52:18,771 INFO L226 Difference]: Without dead ends: 494 [2018-02-04 14:52:18,771 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2568, Invalid=2982, Unknown=0, NotChecked=0, Total=5550 [2018-02-04 14:52:18,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2018-02-04 14:52:18,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 318. [2018-02-04 14:52:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-02-04 14:52:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 319 transitions. [2018-02-04 14:52:18,773 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 319 transitions. Word has length 308 [2018-02-04 14:52:18,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:18,773 INFO L432 AbstractCegarLoop]: Abstraction has 318 states and 319 transitions. [2018-02-04 14:52:18,773 INFO L433 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-02-04 14:52:18,773 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 319 transitions. [2018-02-04 14:52:18,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-02-04 14:52:18,775 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:18,775 INFO L351 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:18,775 INFO L371 AbstractCegarLoop]: === Iteration 54 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash -747367717, now seen corresponding path program 52 times [2018-02-04 14:52:18,775 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:18,775 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:18,776 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:18,776 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:18,776 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:18,788 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6511 backedges. 0 proven. 5618 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2018-02-04 14:52:19,684 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:19,684 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:19,692 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:52:19,736 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:52:19,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:19,740 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6511 backedges. 0 proven. 5618 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2018-02-04 14:52:19,798 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:19,798 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-02-04 14:52:19,798 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-02-04 14:52:19,798 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-02-04 14:52:19,798 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-02-04 14:52:19,798 INFO L87 Difference]: Start difference. First operand 318 states and 319 transitions. Second operand 56 states. [2018-02-04 14:52:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:20,247 INFO L93 Difference]: Finished difference Result 503 states and 538 transitions. [2018-02-04 14:52:20,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-02-04 14:52:20,247 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 317 [2018-02-04 14:52:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:20,248 INFO L225 Difference]: With dead ends: 503 [2018-02-04 14:52:20,248 INFO L226 Difference]: Without dead ends: 503 [2018-02-04 14:52:20,249 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-02-04 14:52:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2018-02-04 14:52:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 322. [2018-02-04 14:52:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-02-04 14:52:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2018-02-04 14:52:20,251 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 317 [2018-02-04 14:52:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:20,251 INFO L432 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2018-02-04 14:52:20,251 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-02-04 14:52:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2018-02-04 14:52:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-02-04 14:52:20,252 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:20,252 INFO L351 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:20,252 INFO L371 AbstractCegarLoop]: === Iteration 55 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:20,252 INFO L82 PathProgramCache]: Analyzing trace with hash -305822974, now seen corresponding path program 53 times [2018-02-04 14:52:20,252 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:20,252 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:20,252 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:20,253 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:20,253 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:20,260 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 0 proven. 5832 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2018-02-04 14:52:21,182 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:21,182 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:21,187 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:52:22,308 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-02-04 14:52:22,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:22,313 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6725 backedges. 0 proven. 5832 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2018-02-04 14:52:22,374 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:22,374 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-02-04 14:52:22,375 INFO L409 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-02-04 14:52:22,375 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-02-04 14:52:22,375 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-02-04 14:52:22,375 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 57 states. [2018-02-04 14:52:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:22,807 INFO L93 Difference]: Finished difference Result 512 states and 548 transitions. [2018-02-04 14:52:22,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-02-04 14:52:22,807 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 321 [2018-02-04 14:52:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:22,808 INFO L225 Difference]: With dead ends: 512 [2018-02-04 14:52:22,808 INFO L226 Difference]: Without dead ends: 512 [2018-02-04 14:52:22,809 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-02-04 14:52:22,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2018-02-04 14:52:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 326. [2018-02-04 14:52:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2018-02-04 14:52:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 327 transitions. [2018-02-04 14:52:22,811 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 327 transitions. Word has length 321 [2018-02-04 14:52:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:22,811 INFO L432 AbstractCegarLoop]: Abstraction has 326 states and 327 transitions. [2018-02-04 14:52:22,811 INFO L433 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-02-04 14:52:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 327 transitions. [2018-02-04 14:52:22,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-02-04 14:52:22,812 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:22,812 INFO L351 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:22,812 INFO L371 AbstractCegarLoop]: === Iteration 56 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:22,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1543206999, now seen corresponding path program 54 times [2018-02-04 14:52:22,812 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:22,812 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:22,812 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:22,813 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:22,813 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:22,820 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 6050 refuted. 0 times theorem prover too weak. 893 trivial. 0 not checked. [2018-02-04 14:52:23,714 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:23,714 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:23,719 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:52:23,881 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-02-04 14:52:23,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:23,885 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6943 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 6050 trivial. 0 not checked. [2018-02-04 14:52:23,948 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:23,948 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 22] total 60 [2018-02-04 14:52:23,949 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-02-04 14:52:23,949 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-02-04 14:52:23,949 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1732, Invalid=1808, Unknown=0, NotChecked=0, Total=3540 [2018-02-04 14:52:23,949 INFO L87 Difference]: Start difference. First operand 326 states and 327 transitions. Second operand 60 states. [2018-02-04 14:52:24,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:24,510 INFO L93 Difference]: Finished difference Result 521 states and 557 transitions. [2018-02-04 14:52:24,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-02-04 14:52:24,510 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 325 [2018-02-04 14:52:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:24,511 INFO L225 Difference]: With dead ends: 521 [2018-02-04 14:52:24,511 INFO L226 Difference]: Without dead ends: 521 [2018-02-04 14:52:24,511 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2853, Invalid=3309, Unknown=0, NotChecked=0, Total=6162 [2018-02-04 14:52:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2018-02-04 14:52:24,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 335. [2018-02-04 14:52:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-02-04 14:52:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2018-02-04 14:52:24,513 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 325 [2018-02-04 14:52:24,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:24,513 INFO L432 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2018-02-04 14:52:24,513 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-02-04 14:52:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2018-02-04 14:52:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-02-04 14:52:24,514 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:24,514 INFO L351 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:24,515 INFO L371 AbstractCegarLoop]: === Iteration 57 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash 586305842, now seen corresponding path program 55 times [2018-02-04 14:52:24,515 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:24,515 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:24,515 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:24,515 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:24,515 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:24,525 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7262 backedges. 0 proven. 6272 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-02-04 14:52:25,577 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:25,577 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:25,601 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:25,649 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7262 backedges. 0 proven. 6272 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-02-04 14:52:25,713 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:25,713 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-02-04 14:52:25,713 INFO L409 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-02-04 14:52:25,714 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-02-04 14:52:25,714 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-02-04 14:52:25,714 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 59 states. [2018-02-04 14:52:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:26,185 INFO L93 Difference]: Finished difference Result 530 states and 567 transitions. [2018-02-04 14:52:26,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-02-04 14:52:26,186 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 334 [2018-02-04 14:52:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:26,187 INFO L225 Difference]: With dead ends: 530 [2018-02-04 14:52:26,187 INFO L226 Difference]: Without dead ends: 530 [2018-02-04 14:52:26,187 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-02-04 14:52:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-02-04 14:52:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 339. [2018-02-04 14:52:26,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-02-04 14:52:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-02-04 14:52:26,189 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334 [2018-02-04 14:52:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:26,189 INFO L432 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-02-04 14:52:26,189 INFO L433 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-02-04 14:52:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-02-04 14:52:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-02-04 14:52:26,190 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:26,190 INFO L351 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:26,190 INFO L371 AbstractCegarLoop]: === Iteration 58 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:26,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1712827413, now seen corresponding path program 56 times [2018-02-04 14:52:26,190 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:26,190 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:26,191 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:26,191 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:26,191 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:26,199 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7488 backedges. 0 proven. 6498 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-02-04 14:52:27,185 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:27,185 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:27,190 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:52:27,223 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:52:27,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:27,226 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7488 backedges. 0 proven. 6498 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-02-04 14:52:27,287 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:27,287 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-02-04 14:52:27,288 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-02-04 14:52:27,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-02-04 14:52:27,288 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-02-04 14:52:27,288 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 60 states. [2018-02-04 14:52:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:27,831 INFO L93 Difference]: Finished difference Result 539 states and 577 transitions. [2018-02-04 14:52:27,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-02-04 14:52:27,831 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 338 [2018-02-04 14:52:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:27,832 INFO L225 Difference]: With dead ends: 539 [2018-02-04 14:52:27,832 INFO L226 Difference]: Without dead ends: 539 [2018-02-04 14:52:27,833 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-02-04 14:52:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2018-02-04 14:52:27,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 343. [2018-02-04 14:52:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-02-04 14:52:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2018-02-04 14:52:27,835 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338 [2018-02-04 14:52:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:27,835 INFO L432 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2018-02-04 14:52:27,835 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-02-04 14:52:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2018-02-04 14:52:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-02-04 14:52:27,836 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:27,836 INFO L351 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:27,836 INFO L371 AbstractCegarLoop]: === Iteration 59 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:27,836 INFO L82 PathProgramCache]: Analyzing trace with hash -868462044, now seen corresponding path program 57 times [2018-02-04 14:52:27,836 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:27,836 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:27,836 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:27,836 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:27,837 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:27,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:27,845 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7718 backedges. 0 proven. 6728 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-02-04 14:52:28,866 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:28,866 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:28,871 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:52:28,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-02-04 14:52:28,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:28,933 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7718 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 6728 trivial. 0 not checked. [2018-02-04 14:52:29,001 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:29,001 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 23] total 63 [2018-02-04 14:52:29,001 INFO L409 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-02-04 14:52:29,002 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-02-04 14:52:29,002 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1913, Invalid=1993, Unknown=0, NotChecked=0, Total=3906 [2018-02-04 14:52:29,002 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 63 states. [2018-02-04 14:52:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:29,645 INFO L93 Difference]: Finished difference Result 548 states and 586 transitions. [2018-02-04 14:52:29,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-02-04 14:52:29,645 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 342 [2018-02-04 14:52:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:29,646 INFO L225 Difference]: With dead ends: 548 [2018-02-04 14:52:29,646 INFO L226 Difference]: Without dead ends: 548 [2018-02-04 14:52:29,647 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3153, Invalid=3653, Unknown=0, NotChecked=0, Total=6806 [2018-02-04 14:52:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2018-02-04 14:52:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 352. [2018-02-04 14:52:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-02-04 14:52:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2018-02-04 14:52:29,649 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 342 [2018-02-04 14:52:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:29,649 INFO L432 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2018-02-04 14:52:29,649 INFO L433 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-02-04 14:52:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2018-02-04 14:52:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-02-04 14:52:29,650 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:29,650 INFO L351 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:29,650 INFO L371 AbstractCegarLoop]: === Iteration 60 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1522366907, now seen corresponding path program 58 times [2018-02-04 14:52:29,651 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:29,651 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:29,651 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:29,651 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:29,651 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:29,660 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8054 backedges. 0 proven. 6962 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2018-02-04 14:52:30,735 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:30,735 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:30,740 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:52:30,796 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:52:30,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:30,799 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:30,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8054 backedges. 0 proven. 6962 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2018-02-04 14:52:30,871 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:30,871 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-02-04 14:52:30,872 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-02-04 14:52:30,872 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-02-04 14:52:30,872 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-02-04 14:52:30,873 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 62 states. [2018-02-04 14:52:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:31,440 INFO L93 Difference]: Finished difference Result 557 states and 596 transitions. [2018-02-04 14:52:31,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-02-04 14:52:31,440 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 351 [2018-02-04 14:52:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:31,441 INFO L225 Difference]: With dead ends: 557 [2018-02-04 14:52:31,441 INFO L226 Difference]: Without dead ends: 557 [2018-02-04 14:52:31,442 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-02-04 14:52:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2018-02-04 14:52:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 356. [2018-02-04 14:52:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-02-04 14:52:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 357 transitions. [2018-02-04 14:52:31,444 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 357 transitions. Word has length 351 [2018-02-04 14:52:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:31,444 INFO L432 AbstractCegarLoop]: Abstraction has 356 states and 357 transitions. [2018-02-04 14:52:31,444 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-02-04 14:52:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 357 transitions. [2018-02-04 14:52:31,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-02-04 14:52:31,445 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:31,445 INFO L351 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:31,445 INFO L371 AbstractCegarLoop]: === Iteration 61 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1782394028, now seen corresponding path program 59 times [2018-02-04 14:52:31,446 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:31,446 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:31,446 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:31,446 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:31,446 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:31,457 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8292 backedges. 0 proven. 7200 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2018-02-04 14:52:32,602 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:32,602 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:32,607 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:52:34,394 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-02-04 14:52:34,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:34,400 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8292 backedges. 0 proven. 7200 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2018-02-04 14:52:34,505 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:34,505 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-02-04 14:52:34,506 INFO L409 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-02-04 14:52:34,506 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-02-04 14:52:34,506 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-02-04 14:52:34,506 INFO L87 Difference]: Start difference. First operand 356 states and 357 transitions. Second operand 63 states. [2018-02-04 14:52:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:35,119 INFO L93 Difference]: Finished difference Result 566 states and 606 transitions. [2018-02-04 14:52:35,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-02-04 14:52:35,120 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 355 [2018-02-04 14:52:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:35,121 INFO L225 Difference]: With dead ends: 566 [2018-02-04 14:52:35,121 INFO L226 Difference]: Without dead ends: 566 [2018-02-04 14:52:35,121 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-02-04 14:52:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2018-02-04 14:52:35,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 360. [2018-02-04 14:52:35,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-02-04 14:52:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 361 transitions. [2018-02-04 14:52:35,123 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 361 transitions. Word has length 355 [2018-02-04 14:52:35,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:35,124 INFO L432 AbstractCegarLoop]: Abstraction has 360 states and 361 transitions. [2018-02-04 14:52:35,124 INFO L433 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-02-04 14:52:35,124 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 361 transitions. [2018-02-04 14:52:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-02-04 14:52:35,124 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:35,125 INFO L351 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:35,125 INFO L371 AbstractCegarLoop]: === Iteration 62 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1260406675, now seen corresponding path program 60 times [2018-02-04 14:52:35,125 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:35,125 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:35,125 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:35,125 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:35,125 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:35,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8534 backedges. 0 proven. 7442 refuted. 0 times theorem prover too weak. 1092 trivial. 0 not checked. [2018-02-04 14:52:36,331 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:36,331 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:36,336 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:52:36,552 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-02-04 14:52:36,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:36,555 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8534 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 7442 trivial. 0 not checked. [2018-02-04 14:52:36,620 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:36,620 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 24] total 66 [2018-02-04 14:52:36,620 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-02-04 14:52:36,620 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-02-04 14:52:36,621 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2103, Invalid=2187, Unknown=0, NotChecked=0, Total=4290 [2018-02-04 14:52:36,621 INFO L87 Difference]: Start difference. First operand 360 states and 361 transitions. Second operand 66 states. [2018-02-04 14:52:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:37,371 INFO L93 Difference]: Finished difference Result 575 states and 615 transitions. [2018-02-04 14:52:37,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-02-04 14:52:37,371 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 359 [2018-02-04 14:52:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:37,373 INFO L225 Difference]: With dead ends: 575 [2018-02-04 14:52:37,373 INFO L226 Difference]: Without dead ends: 575 [2018-02-04 14:52:37,373 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3468, Invalid=4014, Unknown=0, NotChecked=0, Total=7482 [2018-02-04 14:52:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-02-04 14:52:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 369. [2018-02-04 14:52:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-02-04 14:52:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2018-02-04 14:52:37,376 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 359 [2018-02-04 14:52:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:37,376 INFO L432 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2018-02-04 14:52:37,376 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-02-04 14:52:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2018-02-04 14:52:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-02-04 14:52:37,377 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:37,377 INFO L351 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:37,377 INFO L371 AbstractCegarLoop]: === Iteration 63 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:37,377 INFO L82 PathProgramCache]: Analyzing trace with hash 563406152, now seen corresponding path program 61 times [2018-02-04 14:52:37,377 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:37,378 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:37,378 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:37,378 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:37,378 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:37,386 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:38,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8887 backedges. 0 proven. 7688 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2018-02-04 14:52:38,652 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:38,652 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:38,677 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:38,718 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 8887 backedges. 0 proven. 7688 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2018-02-04 14:52:38,786 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:38,786 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-02-04 14:52:38,786 INFO L409 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-02-04 14:52:38,787 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-02-04 14:52:38,787 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-02-04 14:52:38,787 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 65 states. [2018-02-04 14:52:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:39,302 INFO L93 Difference]: Finished difference Result 584 states and 625 transitions. [2018-02-04 14:52:39,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-02-04 14:52:39,302 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 368 [2018-02-04 14:52:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:39,303 INFO L225 Difference]: With dead ends: 584 [2018-02-04 14:52:39,303 INFO L226 Difference]: Without dead ends: 584 [2018-02-04 14:52:39,303 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-02-04 14:52:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2018-02-04 14:52:39,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 373. [2018-02-04 14:52:39,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2018-02-04 14:52:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 374 transitions. [2018-02-04 14:52:39,306 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 374 transitions. Word has length 368 [2018-02-04 14:52:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:39,306 INFO L432 AbstractCegarLoop]: Abstraction has 373 states and 374 transitions. [2018-02-04 14:52:39,306 INFO L433 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-02-04 14:52:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 374 transitions. [2018-02-04 14:52:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-02-04 14:52:39,307 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:39,307 INFO L351 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:39,307 INFO L371 AbstractCegarLoop]: === Iteration 64 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:39,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1596783041, now seen corresponding path program 62 times [2018-02-04 14:52:39,307 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:39,307 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:39,308 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:39,308 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:39,308 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:39,316 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9137 backedges. 0 proven. 7938 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2018-02-04 14:52:40,531 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:40,531 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:40,537 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:52:40,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:52:40,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:40,574 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9137 backedges. 0 proven. 7938 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2018-02-04 14:52:40,644 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:40,644 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-02-04 14:52:40,645 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-02-04 14:52:40,645 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-02-04 14:52:40,645 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-02-04 14:52:40,645 INFO L87 Difference]: Start difference. First operand 373 states and 374 transitions. Second operand 66 states. [2018-02-04 14:52:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:41,318 INFO L93 Difference]: Finished difference Result 593 states and 635 transitions. [2018-02-04 14:52:41,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-02-04 14:52:41,319 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 372 [2018-02-04 14:52:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:41,320 INFO L225 Difference]: With dead ends: 593 [2018-02-04 14:52:41,320 INFO L226 Difference]: Without dead ends: 593 [2018-02-04 14:52:41,320 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-02-04 14:52:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-02-04 14:52:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 377. [2018-02-04 14:52:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2018-02-04 14:52:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 378 transitions. [2018-02-04 14:52:41,323 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 378 transitions. Word has length 372 [2018-02-04 14:52:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:41,324 INFO L432 AbstractCegarLoop]: Abstraction has 377 states and 378 transitions. [2018-02-04 14:52:41,324 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-02-04 14:52:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 378 transitions. [2018-02-04 14:52:41,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-02-04 14:52:41,325 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:41,325 INFO L351 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:41,325 INFO L371 AbstractCegarLoop]: === Iteration 65 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash 826550714, now seen corresponding path program 63 times [2018-02-04 14:52:41,325 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:41,325 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:41,326 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:41,326 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:41,326 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:41,335 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9391 backedges. 0 proven. 8192 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2018-02-04 14:52:42,635 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:42,635 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:42,640 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:52:42,721 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-02-04 14:52:42,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:42,724 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9391 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 8192 trivial. 0 not checked. [2018-02-04 14:52:42,797 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:42,797 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 25] total 69 [2018-02-04 14:52:42,797 INFO L409 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-02-04 14:52:42,798 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-02-04 14:52:42,798 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2302, Invalid=2390, Unknown=0, NotChecked=0, Total=4692 [2018-02-04 14:52:42,798 INFO L87 Difference]: Start difference. First operand 377 states and 378 transitions. Second operand 69 states. [2018-02-04 14:52:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:43,606 INFO L93 Difference]: Finished difference Result 602 states and 644 transitions. [2018-02-04 14:52:43,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-02-04 14:52:43,606 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 376 [2018-02-04 14:52:43,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:43,607 INFO L225 Difference]: With dead ends: 602 [2018-02-04 14:52:43,607 INFO L226 Difference]: Without dead ends: 602 [2018-02-04 14:52:43,608 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3798, Invalid=4392, Unknown=0, NotChecked=0, Total=8190 [2018-02-04 14:52:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2018-02-04 14:52:43,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 386. [2018-02-04 14:52:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2018-02-04 14:52:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2018-02-04 14:52:43,610 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 376 [2018-02-04 14:52:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:43,610 INFO L432 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2018-02-04 14:52:43,611 INFO L433 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-02-04 14:52:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2018-02-04 14:52:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-02-04 14:52:43,611 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:43,612 INFO L351 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:43,612 INFO L371 AbstractCegarLoop]: === Iteration 66 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash -539442513, now seen corresponding path program 64 times [2018-02-04 14:52:43,612 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:43,612 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:43,612 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:43,612 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:43,612 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:43,621 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9761 backedges. 0 proven. 8450 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2018-02-04 14:52:44,981 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:44,981 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:44,991 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:52:45,028 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:52:45,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:45,031 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9761 backedges. 0 proven. 8450 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2018-02-04 14:52:45,100 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:45,101 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-02-04 14:52:45,101 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-02-04 14:52:45,101 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-02-04 14:52:45,101 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-02-04 14:52:45,101 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand 68 states. [2018-02-04 14:52:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:45,674 INFO L93 Difference]: Finished difference Result 611 states and 654 transitions. [2018-02-04 14:52:45,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-02-04 14:52:45,675 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 385 [2018-02-04 14:52:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:45,676 INFO L225 Difference]: With dead ends: 611 [2018-02-04 14:52:45,676 INFO L226 Difference]: Without dead ends: 611 [2018-02-04 14:52:45,676 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-02-04 14:52:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2018-02-04 14:52:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 390. [2018-02-04 14:52:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2018-02-04 14:52:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 391 transitions. [2018-02-04 14:52:45,679 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 391 transitions. Word has length 385 [2018-02-04 14:52:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:45,679 INFO L432 AbstractCegarLoop]: Abstraction has 390 states and 391 transitions. [2018-02-04 14:52:45,679 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-02-04 14:52:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 391 transitions. [2018-02-04 14:52:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-02-04 14:52:45,680 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:45,680 INFO L351 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:45,680 INFO L371 AbstractCegarLoop]: === Iteration 67 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash -740356266, now seen corresponding path program 65 times [2018-02-04 14:52:45,680 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:45,680 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:45,681 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:45,681 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:45,681 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:45,689 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10023 backedges. 0 proven. 8712 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2018-02-04 14:52:47,108 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:47,108 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:47,113 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:52:49,603 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-02-04 14:52:49,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:49,608 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10023 backedges. 0 proven. 8712 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2018-02-04 14:52:49,687 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:49,687 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-02-04 14:52:49,687 INFO L409 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-02-04 14:52:49,688 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-02-04 14:52:49,688 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-02-04 14:52:49,688 INFO L87 Difference]: Start difference. First operand 390 states and 391 transitions. Second operand 69 states. [2018-02-04 14:52:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:50,510 INFO L93 Difference]: Finished difference Result 620 states and 664 transitions. [2018-02-04 14:52:50,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-02-04 14:52:50,511 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 389 [2018-02-04 14:52:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:50,512 INFO L225 Difference]: With dead ends: 620 [2018-02-04 14:52:50,512 INFO L226 Difference]: Without dead ends: 620 [2018-02-04 14:52:50,512 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-02-04 14:52:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2018-02-04 14:52:50,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 394. [2018-02-04 14:52:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-02-04 14:52:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 395 transitions. [2018-02-04 14:52:50,515 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 395 transitions. Word has length 389 [2018-02-04 14:52:50,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:50,515 INFO L432 AbstractCegarLoop]: Abstraction has 394 states and 395 transitions. [2018-02-04 14:52:50,515 INFO L433 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-02-04 14:52:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 395 transitions. [2018-02-04 14:52:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-02-04 14:52:50,516 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:50,516 INFO L351 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:50,516 INFO L371 AbstractCegarLoop]: === Iteration 68 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1928286083, now seen corresponding path program 66 times [2018-02-04 14:52:50,517 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:50,517 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:50,517 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:50,517 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:50,518 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:50,527 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10289 backedges. 0 proven. 8978 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2018-02-04 14:52:51,918 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:51,918 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:51,923 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:52:52,189 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-02-04 14:52:52,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:52,193 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10289 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 8978 trivial. 0 not checked. [2018-02-04 14:52:52,279 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:52,279 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 26] total 72 [2018-02-04 14:52:52,280 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-02-04 14:52:52,280 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-02-04 14:52:52,280 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2510, Invalid=2602, Unknown=0, NotChecked=0, Total=5112 [2018-02-04 14:52:52,280 INFO L87 Difference]: Start difference. First operand 394 states and 395 transitions. Second operand 72 states. [2018-02-04 14:52:53,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:53,154 INFO L93 Difference]: Finished difference Result 629 states and 673 transitions. [2018-02-04 14:52:53,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-02-04 14:52:53,154 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 393 [2018-02-04 14:52:53,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:53,156 INFO L225 Difference]: With dead ends: 629 [2018-02-04 14:52:53,156 INFO L226 Difference]: Without dead ends: 629 [2018-02-04 14:52:53,156 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4143, Invalid=4787, Unknown=0, NotChecked=0, Total=8930 [2018-02-04 14:52:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-02-04 14:52:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 403. [2018-02-04 14:52:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-02-04 14:52:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2018-02-04 14:52:53,158 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2018-02-04 14:52:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:53,159 INFO L432 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2018-02-04 14:52:53,159 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-02-04 14:52:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2018-02-04 14:52:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-02-04 14:52:53,160 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:53,160 INFO L351 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:53,160 INFO L371 AbstractCegarLoop]: === Iteration 69 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1074266018, now seen corresponding path program 67 times [2018-02-04 14:52:53,160 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:53,160 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:53,160 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:53,160 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:53,160 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:53,169 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:54,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10676 backedges. 0 proven. 9248 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2018-02-04 14:52:54,606 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:54,606 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:54,631 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:54,672 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 10676 backedges. 0 proven. 9248 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2018-02-04 14:52:54,754 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:54,754 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-02-04 14:52:54,755 INFO L409 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-02-04 14:52:54,755 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-02-04 14:52:54,755 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-02-04 14:52:54,755 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 71 states. [2018-02-04 14:52:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:55,550 INFO L93 Difference]: Finished difference Result 638 states and 683 transitions. [2018-02-04 14:52:55,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-02-04 14:52:55,551 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 402 [2018-02-04 14:52:55,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:55,552 INFO L225 Difference]: With dead ends: 638 [2018-02-04 14:52:55,552 INFO L226 Difference]: Without dead ends: 638 [2018-02-04 14:52:55,552 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-02-04 14:52:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2018-02-04 14:52:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 407. [2018-02-04 14:52:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-02-04 14:52:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 408 transitions. [2018-02-04 14:52:55,554 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 408 transitions. Word has length 402 [2018-02-04 14:52:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:55,554 INFO L432 AbstractCegarLoop]: Abstraction has 407 states and 408 transitions. [2018-02-04 14:52:55,554 INFO L433 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-02-04 14:52:55,554 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 408 transitions. [2018-02-04 14:52:55,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-02-04 14:52:55,555 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:55,555 INFO L351 BasicCegarLoop]: trace histogram [70, 69, 69, 69, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:55,555 INFO L371 AbstractCegarLoop]: === Iteration 70 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:55,555 INFO L82 PathProgramCache]: Analyzing trace with hash 587052695, now seen corresponding path program 68 times [2018-02-04 14:52:55,556 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:55,556 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:55,556 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:55,556 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:52:55,556 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:55,565 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10950 backedges. 0 proven. 9522 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2018-02-04 14:52:57,094 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:57,094 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:57,099 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:52:57,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:52:57,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:57,144 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10950 backedges. 0 proven. 9522 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2018-02-04 14:52:57,222 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:57,222 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-02-04 14:52:57,222 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-02-04 14:52:57,223 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-02-04 14:52:57,223 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-02-04 14:52:57,223 INFO L87 Difference]: Start difference. First operand 407 states and 408 transitions. Second operand 72 states. [2018-02-04 14:52:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:52:58,086 INFO L93 Difference]: Finished difference Result 647 states and 693 transitions. [2018-02-04 14:52:58,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-02-04 14:52:58,087 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 406 [2018-02-04 14:52:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:52:58,088 INFO L225 Difference]: With dead ends: 647 [2018-02-04 14:52:58,088 INFO L226 Difference]: Without dead ends: 647 [2018-02-04 14:52:58,088 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-02-04 14:52:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2018-02-04 14:52:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 411. [2018-02-04 14:52:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-02-04 14:52:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 412 transitions. [2018-02-04 14:52:58,091 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 412 transitions. Word has length 406 [2018-02-04 14:52:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:52:58,091 INFO L432 AbstractCegarLoop]: Abstraction has 411 states and 412 transitions. [2018-02-04 14:52:58,092 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-02-04 14:52:58,092 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 412 transitions. [2018-02-04 14:52:58,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-02-04 14:52:58,093 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:52:58,093 INFO L351 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:52:58,093 INFO L371 AbstractCegarLoop]: === Iteration 71 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:52:58,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2091145136, now seen corresponding path program 69 times [2018-02-04 14:52:58,093 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:52:58,093 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:52:58,093 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:58,093 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:52:58,094 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:52:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:52:58,103 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:52:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11228 backedges. 0 proven. 9800 refuted. 0 times theorem prover too weak. 1428 trivial. 0 not checked. [2018-02-04 14:52:59,679 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:52:59,679 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:52:59,684 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:52:59,765 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-02-04 14:52:59,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:52:59,768 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:52:59,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11228 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2018-02-04 14:52:59,848 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:52:59,849 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 27] total 75 [2018-02-04 14:52:59,849 INFO L409 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-02-04 14:52:59,849 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-02-04 14:52:59,850 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2727, Invalid=2823, Unknown=0, NotChecked=0, Total=5550 [2018-02-04 14:52:59,850 INFO L87 Difference]: Start difference. First operand 411 states and 412 transitions. Second operand 75 states. [2018-02-04 14:53:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:00,898 INFO L93 Difference]: Finished difference Result 656 states and 702 transitions. [2018-02-04 14:53:00,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-02-04 14:53:00,898 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 410 [2018-02-04 14:53:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:00,900 INFO L225 Difference]: With dead ends: 656 [2018-02-04 14:53:00,900 INFO L226 Difference]: Without dead ends: 656 [2018-02-04 14:53:00,900 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4503, Invalid=5199, Unknown=0, NotChecked=0, Total=9702 [2018-02-04 14:53:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2018-02-04 14:53:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 420. [2018-02-04 14:53:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2018-02-04 14:53:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 421 transitions. [2018-02-04 14:53:00,903 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 421 transitions. Word has length 410 [2018-02-04 14:53:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:00,903 INFO L432 AbstractCegarLoop]: Abstraction has 420 states and 421 transitions. [2018-02-04 14:53:00,903 INFO L433 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-02-04 14:53:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 421 transitions. [2018-02-04 14:53:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-02-04 14:53:00,904 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:00,904 INFO L351 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:00,904 INFO L371 AbstractCegarLoop]: === Iteration 72 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:00,905 INFO L82 PathProgramCache]: Analyzing trace with hash -57792487, now seen corresponding path program 70 times [2018-02-04 14:53:00,905 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:00,905 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:00,905 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:00,905 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:00,905 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:00,914 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 11632 backedges. 0 proven. 10082 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2018-02-04 14:53:02,688 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:02,688 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:02,711 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:53:02,754 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:53:02,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:02,758 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11632 backedges. 0 proven. 10082 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2018-02-04 14:53:02,852 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:02,852 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-02-04 14:53:02,853 INFO L409 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-02-04 14:53:02,853 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-02-04 14:53:02,853 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-02-04 14:53:02,853 INFO L87 Difference]: Start difference. First operand 420 states and 421 transitions. Second operand 74 states. [2018-02-04 14:53:03,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:03,483 INFO L93 Difference]: Finished difference Result 665 states and 712 transitions. [2018-02-04 14:53:03,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-02-04 14:53:03,483 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 419 [2018-02-04 14:53:03,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:03,485 INFO L225 Difference]: With dead ends: 665 [2018-02-04 14:53:03,485 INFO L226 Difference]: Without dead ends: 665 [2018-02-04 14:53:03,485 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-02-04 14:53:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2018-02-04 14:53:03,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 424. [2018-02-04 14:53:03,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-02-04 14:53:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2018-02-04 14:53:03,487 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 419 [2018-02-04 14:53:03,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:03,488 INFO L432 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2018-02-04 14:53:03,488 INFO L433 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-02-04 14:53:03,488 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2018-02-04 14:53:03,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-02-04 14:53:03,489 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:03,489 INFO L351 BasicCegarLoop]: trace histogram [73, 72, 72, 72, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:03,489 INFO L371 AbstractCegarLoop]: === Iteration 73 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash -546927872, now seen corresponding path program 71 times [2018-02-04 14:53:03,489 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:03,489 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:03,489 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:03,490 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:03,490 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:03,499 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 11918 backedges. 0 proven. 10368 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2018-02-04 14:53:05,041 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:05,041 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:05,046 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:53:07,938 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-02-04 14:53:07,938 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:07,943 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:08,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11918 backedges. 0 proven. 10368 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2018-02-04 14:53:08,026 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:08,026 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-02-04 14:53:08,026 INFO L409 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-02-04 14:53:08,027 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-02-04 14:53:08,027 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-02-04 14:53:08,027 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand 75 states. [2018-02-04 14:53:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:08,787 INFO L93 Difference]: Finished difference Result 674 states and 722 transitions. [2018-02-04 14:53:08,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-02-04 14:53:08,787 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 423 [2018-02-04 14:53:08,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:08,789 INFO L225 Difference]: With dead ends: 674 [2018-02-04 14:53:08,789 INFO L226 Difference]: Without dead ends: 674 [2018-02-04 14:53:08,789 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-02-04 14:53:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2018-02-04 14:53:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 428. [2018-02-04 14:53:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-02-04 14:53:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 429 transitions. [2018-02-04 14:53:08,791 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 429 transitions. Word has length 423 [2018-02-04 14:53:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:08,791 INFO L432 AbstractCegarLoop]: Abstraction has 428 states and 429 transitions. [2018-02-04 14:53:08,791 INFO L433 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-02-04 14:53:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 429 transitions. [2018-02-04 14:53:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-02-04 14:53:08,792 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:08,793 INFO L351 BasicCegarLoop]: trace histogram [74, 73, 73, 73, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:08,793 INFO L371 AbstractCegarLoop]: === Iteration 74 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:08,793 INFO L82 PathProgramCache]: Analyzing trace with hash 133505639, now seen corresponding path program 72 times [2018-02-04 14:53:08,793 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:08,793 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:08,793 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:08,793 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:08,793 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:08,802 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12208 backedges. 0 proven. 10658 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2018-02-04 14:53:10,391 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:10,391 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:10,396 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:53:10,687 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-02-04 14:53:10,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:10,690 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12208 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 10658 trivial. 0 not checked. [2018-02-04 14:53:10,772 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:10,772 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 28] total 78 [2018-02-04 14:53:10,772 INFO L409 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-02-04 14:53:10,773 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-02-04 14:53:10,773 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2953, Invalid=3053, Unknown=0, NotChecked=0, Total=6006 [2018-02-04 14:53:10,773 INFO L87 Difference]: Start difference. First operand 428 states and 429 transitions. Second operand 78 states. [2018-02-04 14:53:11,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:11,676 INFO L93 Difference]: Finished difference Result 683 states and 731 transitions. [2018-02-04 14:53:11,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-02-04 14:53:11,676 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 427 [2018-02-04 14:53:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:11,678 INFO L225 Difference]: With dead ends: 683 [2018-02-04 14:53:11,678 INFO L226 Difference]: Without dead ends: 683 [2018-02-04 14:53:11,678 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4878, Invalid=5628, Unknown=0, NotChecked=0, Total=10506 [2018-02-04 14:53:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-02-04 14:53:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 437. [2018-02-04 14:53:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2018-02-04 14:53:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 438 transitions. [2018-02-04 14:53:11,681 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 438 transitions. Word has length 427 [2018-02-04 14:53:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:11,681 INFO L432 AbstractCegarLoop]: Abstraction has 437 states and 438 transitions. [2018-02-04 14:53:11,681 INFO L433 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-02-04 14:53:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 438 transitions. [2018-02-04 14:53:11,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-02-04 14:53:11,682 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:11,682 INFO L351 BasicCegarLoop]: trace histogram [75, 74, 74, 74, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:11,682 INFO L371 AbstractCegarLoop]: === Iteration 75 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:11,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1816903052, now seen corresponding path program 73 times [2018-02-04 14:53:11,682 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:11,683 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:11,683 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:11,683 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:11,683 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:11,693 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12629 backedges. 0 proven. 10952 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2018-02-04 14:53:13,292 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:13,292 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:13,296 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:53:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:13,341 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12629 backedges. 0 proven. 10952 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2018-02-04 14:53:13,494 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:13,494 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-02-04 14:53:13,494 INFO L409 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-02-04 14:53:13,494 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-02-04 14:53:13,494 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-02-04 14:53:13,495 INFO L87 Difference]: Start difference. First operand 437 states and 438 transitions. Second operand 77 states. [2018-02-04 14:53:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:14,270 INFO L93 Difference]: Finished difference Result 692 states and 741 transitions. [2018-02-04 14:53:14,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-02-04 14:53:14,270 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 436 [2018-02-04 14:53:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:14,271 INFO L225 Difference]: With dead ends: 692 [2018-02-04 14:53:14,271 INFO L226 Difference]: Without dead ends: 692 [2018-02-04 14:53:14,272 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-02-04 14:53:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2018-02-04 14:53:14,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 441. [2018-02-04 14:53:14,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2018-02-04 14:53:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 442 transitions. [2018-02-04 14:53:14,274 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 442 transitions. Word has length 436 [2018-02-04 14:53:14,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:14,274 INFO L432 AbstractCegarLoop]: Abstraction has 441 states and 442 transitions. [2018-02-04 14:53:14,274 INFO L433 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-02-04 14:53:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 442 transitions. [2018-02-04 14:53:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-02-04 14:53:14,275 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:14,275 INFO L351 BasicCegarLoop]: trace histogram [76, 75, 75, 75, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:14,275 INFO L371 AbstractCegarLoop]: === Iteration 76 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:14,275 INFO L82 PathProgramCache]: Analyzing trace with hash -200332691, now seen corresponding path program 74 times [2018-02-04 14:53:14,275 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:14,275 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:14,276 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:14,276 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:53:14,276 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:14,285 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 0 proven. 11250 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2018-02-04 14:53:15,910 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:15,910 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:15,915 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:53:15,955 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:53:15,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:15,958 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12927 backedges. 0 proven. 11250 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2018-02-04 14:53:16,050 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:16,050 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-02-04 14:53:16,050 INFO L409 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-02-04 14:53:16,051 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-02-04 14:53:16,051 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-02-04 14:53:16,051 INFO L87 Difference]: Start difference. First operand 441 states and 442 transitions. Second operand 78 states. [2018-02-04 14:53:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:17,022 INFO L93 Difference]: Finished difference Result 701 states and 751 transitions. [2018-02-04 14:53:17,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-02-04 14:53:17,022 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 440 [2018-02-04 14:53:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:17,024 INFO L225 Difference]: With dead ends: 701 [2018-02-04 14:53:17,024 INFO L226 Difference]: Without dead ends: 701 [2018-02-04 14:53:17,024 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-02-04 14:53:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2018-02-04 14:53:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 445. [2018-02-04 14:53:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2018-02-04 14:53:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 446 transitions. [2018-02-04 14:53:17,026 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 446 transitions. Word has length 440 [2018-02-04 14:53:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:17,027 INFO L432 AbstractCegarLoop]: Abstraction has 445 states and 446 transitions. [2018-02-04 14:53:17,027 INFO L433 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-02-04 14:53:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 446 transitions. [2018-02-04 14:53:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2018-02-04 14:53:17,028 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:17,028 INFO L351 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:17,028 INFO L371 AbstractCegarLoop]: === Iteration 77 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1548971494, now seen corresponding path program 75 times [2018-02-04 14:53:17,028 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:17,028 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:17,029 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:17,029 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:17,029 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:17,038 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13229 backedges. 0 proven. 11552 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2018-02-04 14:53:18,737 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:18,737 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:18,741 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:53:18,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-02-04 14:53:18,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:18,875 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 13229 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 11552 trivial. 0 not checked. [2018-02-04 14:53:18,960 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:18,960 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 29] total 81 [2018-02-04 14:53:18,960 INFO L409 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-02-04 14:53:18,961 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-02-04 14:53:18,961 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3188, Invalid=3292, Unknown=0, NotChecked=0, Total=6480 [2018-02-04 14:53:18,961 INFO L87 Difference]: Start difference. First operand 445 states and 446 transitions. Second operand 81 states. [2018-02-04 14:53:19,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:19,954 INFO L93 Difference]: Finished difference Result 710 states and 760 transitions. [2018-02-04 14:53:19,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-02-04 14:53:19,954 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 444 [2018-02-04 14:53:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:19,955 INFO L225 Difference]: With dead ends: 710 [2018-02-04 14:53:19,955 INFO L226 Difference]: Without dead ends: 710 [2018-02-04 14:53:19,956 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5268, Invalid=6074, Unknown=0, NotChecked=0, Total=11342 [2018-02-04 14:53:19,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2018-02-04 14:53:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 454. [2018-02-04 14:53:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2018-02-04 14:53:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2018-02-04 14:53:19,958 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 444 [2018-02-04 14:53:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:19,958 INFO L432 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2018-02-04 14:53:19,958 INFO L433 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-02-04 14:53:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2018-02-04 14:53:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2018-02-04 14:53:19,959 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:19,960 INFO L351 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:19,960 INFO L371 AbstractCegarLoop]: === Iteration 78 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:19,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1062868611, now seen corresponding path program 76 times [2018-02-04 14:53:19,960 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:19,960 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:19,960 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:19,960 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:19,960 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:19,972 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13667 backedges. 0 proven. 11858 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2018-02-04 14:53:21,718 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:21,718 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:21,722 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:53:21,764 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:53:21,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:21,767 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13667 backedges. 0 proven. 11858 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2018-02-04 14:53:21,864 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:21,865 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-02-04 14:53:21,865 INFO L409 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-02-04 14:53:21,865 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-02-04 14:53:21,865 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-02-04 14:53:21,865 INFO L87 Difference]: Start difference. First operand 454 states and 455 transitions. Second operand 80 states. [2018-02-04 14:53:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:22,551 INFO L93 Difference]: Finished difference Result 719 states and 770 transitions. [2018-02-04 14:53:22,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-02-04 14:53:22,552 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 453 [2018-02-04 14:53:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:22,553 INFO L225 Difference]: With dead ends: 719 [2018-02-04 14:53:22,553 INFO L226 Difference]: Without dead ends: 719 [2018-02-04 14:53:22,553 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-02-04 14:53:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-02-04 14:53:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 458. [2018-02-04 14:53:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2018-02-04 14:53:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 459 transitions. [2018-02-04 14:53:22,556 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 459 transitions. Word has length 453 [2018-02-04 14:53:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:22,556 INFO L432 AbstractCegarLoop]: Abstraction has 458 states and 459 transitions. [2018-02-04 14:53:22,556 INFO L433 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-02-04 14:53:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 459 transitions. [2018-02-04 14:53:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2018-02-04 14:53:22,557 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:22,557 INFO L351 BasicCegarLoop]: trace histogram [79, 78, 78, 78, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:22,557 INFO L371 AbstractCegarLoop]: === Iteration 79 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:22,557 INFO L82 PathProgramCache]: Analyzing trace with hash 858718122, now seen corresponding path program 77 times [2018-02-04 14:53:22,557 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:22,557 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:22,558 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:22,558 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:22,558 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:22,567 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13977 backedges. 0 proven. 12168 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2018-02-04 14:53:24,300 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:24,324 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:24,329 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:53:28,381 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-02-04 14:53:28,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:28,387 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13977 backedges. 0 proven. 12168 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2018-02-04 14:53:28,495 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:28,495 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-02-04 14:53:28,496 INFO L409 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-02-04 14:53:28,497 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-02-04 14:53:28,497 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-02-04 14:53:28,497 INFO L87 Difference]: Start difference. First operand 458 states and 459 transitions. Second operand 81 states. [2018-02-04 14:53:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:29,644 INFO L93 Difference]: Finished difference Result 728 states and 780 transitions. [2018-02-04 14:53:29,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-02-04 14:53:29,645 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 457 [2018-02-04 14:53:29,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:29,646 INFO L225 Difference]: With dead ends: 728 [2018-02-04 14:53:29,646 INFO L226 Difference]: Without dead ends: 728 [2018-02-04 14:53:29,647 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-02-04 14:53:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2018-02-04 14:53:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 462. [2018-02-04 14:53:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2018-02-04 14:53:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 463 transitions. [2018-02-04 14:53:29,649 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 463 transitions. Word has length 457 [2018-02-04 14:53:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:29,649 INFO L432 AbstractCegarLoop]: Abstraction has 462 states and 463 transitions. [2018-02-04 14:53:29,649 INFO L433 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-02-04 14:53:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 463 transitions. [2018-02-04 14:53:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2018-02-04 14:53:29,651 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:29,651 INFO L351 BasicCegarLoop]: trace histogram [80, 79, 79, 79, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:29,651 INFO L371 AbstractCegarLoop]: === Iteration 80 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash -225641135, now seen corresponding path program 78 times [2018-02-04 14:53:29,651 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:29,651 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:29,651 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:29,651 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:29,651 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:29,661 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14291 backedges. 0 proven. 12482 refuted. 0 times theorem prover too weak. 1809 trivial. 0 not checked. [2018-02-04 14:53:31,444 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:31,444 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:31,449 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:53:31,818 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-02-04 14:53:31,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:31,821 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14291 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2018-02-04 14:53:31,913 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:31,914 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 30] total 84 [2018-02-04 14:53:31,914 INFO L409 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-02-04 14:53:31,914 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-02-04 14:53:31,915 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3432, Invalid=3540, Unknown=0, NotChecked=0, Total=6972 [2018-02-04 14:53:31,915 INFO L87 Difference]: Start difference. First operand 462 states and 463 transitions. Second operand 84 states. [2018-02-04 14:53:32,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:32,976 INFO L93 Difference]: Finished difference Result 737 states and 789 transitions. [2018-02-04 14:53:32,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-02-04 14:53:32,977 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 461 [2018-02-04 14:53:32,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:32,978 INFO L225 Difference]: With dead ends: 737 [2018-02-04 14:53:32,978 INFO L226 Difference]: Without dead ends: 737 [2018-02-04 14:53:32,979 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5673, Invalid=6537, Unknown=0, NotChecked=0, Total=12210 [2018-02-04 14:53:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2018-02-04 14:53:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 471. [2018-02-04 14:53:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2018-02-04 14:53:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2018-02-04 14:53:32,982 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 461 [2018-02-04 14:53:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:32,982 INFO L432 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2018-02-04 14:53:32,982 INFO L433 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-02-04 14:53:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2018-02-04 14:53:32,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-02-04 14:53:32,983 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:32,983 INFO L351 BasicCegarLoop]: trace histogram [81, 80, 80, 80, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:32,983 INFO L371 AbstractCegarLoop]: === Iteration 81 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:32,983 INFO L82 PathProgramCache]: Analyzing trace with hash 918702986, now seen corresponding path program 79 times [2018-02-04 14:53:32,983 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:32,983 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:32,984 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:32,984 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:32,984 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:32,993 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14746 backedges. 0 proven. 12800 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2018-02-04 14:53:34,859 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:34,886 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:34,890 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:53:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:34,939 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14746 backedges. 0 proven. 12800 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2018-02-04 14:53:35,033 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:35,033 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-02-04 14:53:35,033 INFO L409 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-02-04 14:53:35,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-02-04 14:53:35,034 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-02-04 14:53:35,034 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand 83 states. [2018-02-04 14:53:36,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:36,085 INFO L93 Difference]: Finished difference Result 746 states and 799 transitions. [2018-02-04 14:53:36,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-02-04 14:53:36,085 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 470 [2018-02-04 14:53:36,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:36,086 INFO L225 Difference]: With dead ends: 746 [2018-02-04 14:53:36,086 INFO L226 Difference]: Without dead ends: 746 [2018-02-04 14:53:36,087 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-02-04 14:53:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2018-02-04 14:53:36,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 475. [2018-02-04 14:53:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2018-02-04 14:53:36,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 476 transitions. [2018-02-04 14:53:36,089 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 476 transitions. Word has length 470 [2018-02-04 14:53:36,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:36,089 INFO L432 AbstractCegarLoop]: Abstraction has 475 states and 476 transitions. [2018-02-04 14:53:36,089 INFO L433 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-02-04 14:53:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 476 transitions. [2018-02-04 14:53:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2018-02-04 14:53:36,091 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:36,091 INFO L351 BasicCegarLoop]: trace histogram [82, 81, 81, 81, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:36,091 INFO L371 AbstractCegarLoop]: === Iteration 82 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:36,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1636436669, now seen corresponding path program 80 times [2018-02-04 14:53:36,091 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:36,091 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:36,091 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:36,091 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:53:36,091 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:36,101 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15068 backedges. 0 proven. 13122 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2018-02-04 14:53:38,012 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:38,012 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:38,016 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:53:38,059 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:53:38,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:38,062 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15068 backedges. 0 proven. 13122 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2018-02-04 14:53:38,155 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:38,155 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-02-04 14:53:38,155 INFO L409 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-02-04 14:53:38,155 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-02-04 14:53:38,156 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-02-04 14:53:38,156 INFO L87 Difference]: Start difference. First operand 475 states and 476 transitions. Second operand 84 states. [2018-02-04 14:53:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:39,125 INFO L93 Difference]: Finished difference Result 755 states and 809 transitions. [2018-02-04 14:53:39,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-02-04 14:53:39,125 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 474 [2018-02-04 14:53:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:39,126 INFO L225 Difference]: With dead ends: 755 [2018-02-04 14:53:39,126 INFO L226 Difference]: Without dead ends: 755 [2018-02-04 14:53:39,126 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-02-04 14:53:39,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2018-02-04 14:53:39,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 479. [2018-02-04 14:53:39,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-02-04 14:53:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 480 transitions. [2018-02-04 14:53:39,129 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 480 transitions. Word has length 474 [2018-02-04 14:53:39,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:39,129 INFO L432 AbstractCegarLoop]: Abstraction has 479 states and 480 transitions. [2018-02-04 14:53:39,129 INFO L433 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-02-04 14:53:39,129 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 480 transitions. [2018-02-04 14:53:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-02-04 14:53:39,130 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:39,130 INFO L351 BasicCegarLoop]: trace histogram [83, 82, 82, 82, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:39,130 INFO L371 AbstractCegarLoop]: === Iteration 83 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:39,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1281104508, now seen corresponding path program 81 times [2018-02-04 14:53:39,130 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:39,130 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:39,131 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:39,131 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:39,131 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:39,141 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15394 backedges. 0 proven. 13448 refuted. 0 times theorem prover too weak. 1946 trivial. 0 not checked. [2018-02-04 14:53:41,089 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:41,089 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:41,094 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:53:41,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-02-04 14:53:41,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:41,218 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 15394 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 13448 trivial. 0 not checked. [2018-02-04 14:53:41,308 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:41,309 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 31] total 87 [2018-02-04 14:53:41,309 INFO L409 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-02-04 14:53:41,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-02-04 14:53:41,309 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3685, Invalid=3797, Unknown=0, NotChecked=0, Total=7482 [2018-02-04 14:53:41,310 INFO L87 Difference]: Start difference. First operand 479 states and 480 transitions. Second operand 87 states. [2018-02-04 14:53:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:42,468 INFO L93 Difference]: Finished difference Result 764 states and 818 transitions. [2018-02-04 14:53:42,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-02-04 14:53:42,468 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 478 [2018-02-04 14:53:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:42,469 INFO L225 Difference]: With dead ends: 764 [2018-02-04 14:53:42,469 INFO L226 Difference]: Without dead ends: 764 [2018-02-04 14:53:42,470 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=6093, Invalid=7017, Unknown=0, NotChecked=0, Total=13110 [2018-02-04 14:53:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-02-04 14:53:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 488. [2018-02-04 14:53:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-02-04 14:53:42,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 489 transitions. [2018-02-04 14:53:42,473 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 489 transitions. Word has length 478 [2018-02-04 14:53:42,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:42,473 INFO L432 AbstractCegarLoop]: Abstraction has 488 states and 489 transitions. [2018-02-04 14:53:42,473 INFO L433 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-02-04 14:53:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 489 transitions. [2018-02-04 14:53:42,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-02-04 14:53:42,475 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:42,476 INFO L351 BasicCegarLoop]: trace histogram [84, 83, 83, 83, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:42,476 INFO L371 AbstractCegarLoop]: === Iteration 84 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:42,476 INFO L82 PathProgramCache]: Analyzing trace with hash -657199635, now seen corresponding path program 82 times [2018-02-04 14:53:42,476 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:42,476 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:42,477 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:42,477 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:42,477 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:42,486 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15866 backedges. 0 proven. 13778 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-02-04 14:53:44,472 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:44,472 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:44,476 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:53:44,520 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:53:44,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:44,523 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15866 backedges. 0 proven. 13778 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-02-04 14:53:44,620 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:44,621 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-02-04 14:53:44,621 INFO L409 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-02-04 14:53:44,621 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-02-04 14:53:44,622 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-02-04 14:53:44,622 INFO L87 Difference]: Start difference. First operand 488 states and 489 transitions. Second operand 86 states. [2018-02-04 14:53:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:45,967 INFO L93 Difference]: Finished difference Result 773 states and 828 transitions. [2018-02-04 14:53:45,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-02-04 14:53:45,968 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 487 [2018-02-04 14:53:45,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:45,969 INFO L225 Difference]: With dead ends: 773 [2018-02-04 14:53:45,969 INFO L226 Difference]: Without dead ends: 773 [2018-02-04 14:53:45,969 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-02-04 14:53:45,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2018-02-04 14:53:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 492. [2018-02-04 14:53:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2018-02-04 14:53:45,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 493 transitions. [2018-02-04 14:53:45,972 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 493 transitions. Word has length 487 [2018-02-04 14:53:45,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:45,972 INFO L432 AbstractCegarLoop]: Abstraction has 492 states and 493 transitions. [2018-02-04 14:53:45,972 INFO L433 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-02-04 14:53:45,972 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 493 transitions. [2018-02-04 14:53:45,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2018-02-04 14:53:45,973 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:45,973 INFO L351 BasicCegarLoop]: trace histogram [85, 84, 84, 84, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:45,973 INFO L371 AbstractCegarLoop]: === Iteration 85 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:45,973 INFO L82 PathProgramCache]: Analyzing trace with hash -919351980, now seen corresponding path program 83 times [2018-02-04 14:53:45,974 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:45,974 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:45,974 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:45,974 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:45,974 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:45,984 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16200 backedges. 0 proven. 14112 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-02-04 14:53:48,103 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:48,103 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:48,108 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:53:53,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-02-04 14:53:53,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:53,446 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16200 backedges. 0 proven. 14112 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-02-04 14:53:53,549 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:53,549 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-02-04 14:53:53,549 INFO L409 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-02-04 14:53:53,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-02-04 14:53:53,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-02-04 14:53:53,550 INFO L87 Difference]: Start difference. First operand 492 states and 493 transitions. Second operand 87 states. [2018-02-04 14:53:54,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:54,852 INFO L93 Difference]: Finished difference Result 782 states and 838 transitions. [2018-02-04 14:53:54,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-02-04 14:53:54,852 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 491 [2018-02-04 14:53:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:54,853 INFO L225 Difference]: With dead ends: 782 [2018-02-04 14:53:54,853 INFO L226 Difference]: Without dead ends: 782 [2018-02-04 14:53:54,853 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-02-04 14:53:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2018-02-04 14:53:54,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 496. [2018-02-04 14:53:54,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-02-04 14:53:54,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 497 transitions. [2018-02-04 14:53:54,856 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 497 transitions. Word has length 491 [2018-02-04 14:53:54,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:54,857 INFO L432 AbstractCegarLoop]: Abstraction has 496 states and 497 transitions. [2018-02-04 14:53:54,857 INFO L433 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-02-04 14:53:54,857 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 497 transitions. [2018-02-04 14:53:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-02-04 14:53:54,859 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:54,859 INFO L351 BasicCegarLoop]: trace histogram [86, 85, 85, 85, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:54,859 INFO L371 AbstractCegarLoop]: === Iteration 86 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:54,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1103650501, now seen corresponding path program 84 times [2018-02-04 14:53:54,859 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:54,859 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:54,860 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:54,860 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:54,860 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:54,870 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:53:56,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16538 backedges. 0 proven. 14450 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-02-04 14:53:56,971 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:53:56,971 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:53:56,975 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:53:57,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2018-02-04 14:53:57,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:53:57,446 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:53:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16538 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 14450 trivial. 0 not checked. [2018-02-04 14:53:57,543 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:53:57,544 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 32] total 90 [2018-02-04 14:53:57,544 INFO L409 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-02-04 14:53:57,545 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-02-04 14:53:57,545 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3947, Invalid=4063, Unknown=0, NotChecked=0, Total=8010 [2018-02-04 14:53:57,545 INFO L87 Difference]: Start difference. First operand 496 states and 497 transitions. Second operand 90 states. [2018-02-04 14:53:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:53:58,981 INFO L93 Difference]: Finished difference Result 791 states and 847 transitions. [2018-02-04 14:53:58,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-02-04 14:53:58,982 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 495 [2018-02-04 14:53:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:53:58,983 INFO L225 Difference]: With dead ends: 791 [2018-02-04 14:53:58,983 INFO L226 Difference]: Without dead ends: 791 [2018-02-04 14:53:58,983 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=6528, Invalid=7514, Unknown=0, NotChecked=0, Total=14042 [2018-02-04 14:53:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2018-02-04 14:53:58,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 505. [2018-02-04 14:53:58,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2018-02-04 14:53:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2018-02-04 14:53:58,986 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 495 [2018-02-04 14:53:58,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:53:58,986 INFO L432 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2018-02-04 14:53:58,986 INFO L433 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-02-04 14:53:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2018-02-04 14:53:58,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-02-04 14:53:58,987 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:53:58,988 INFO L351 BasicCegarLoop]: trace histogram [87, 86, 86, 86, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:53:58,988 INFO L371 AbstractCegarLoop]: === Iteration 87 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:53:58,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1518683232, now seen corresponding path program 85 times [2018-02-04 14:53:58,988 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:53:58,988 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:53:58,988 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:58,988 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:53:58,988 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:53:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:53:58,998 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 17027 backedges. 0 proven. 14792 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2018-02-04 14:54:01,268 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:01,268 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:01,273 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:54:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:01,321 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17027 backedges. 0 proven. 14792 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2018-02-04 14:54:01,433 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:01,433 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-02-04 14:54:01,434 INFO L409 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-02-04 14:54:01,434 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-02-04 14:54:01,434 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-02-04 14:54:01,434 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand 89 states. [2018-02-04 14:54:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:02,860 INFO L93 Difference]: Finished difference Result 800 states and 857 transitions. [2018-02-04 14:54:02,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-02-04 14:54:02,860 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 504 [2018-02-04 14:54:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:02,861 INFO L225 Difference]: With dead ends: 800 [2018-02-04 14:54:02,861 INFO L226 Difference]: Without dead ends: 800 [2018-02-04 14:54:02,861 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-02-04 14:54:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2018-02-04 14:54:02,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 509. [2018-02-04 14:54:02,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2018-02-04 14:54:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 510 transitions. [2018-02-04 14:54:02,866 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 510 transitions. Word has length 504 [2018-02-04 14:54:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:02,867 INFO L432 AbstractCegarLoop]: Abstraction has 509 states and 510 transitions. [2018-02-04 14:54:02,867 INFO L433 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-02-04 14:54:02,867 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 510 transitions. [2018-02-04 14:54:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-02-04 14:54:02,869 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:02,869 INFO L351 BasicCegarLoop]: trace histogram [88, 87, 87, 87, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:02,869 INFO L371 AbstractCegarLoop]: === Iteration 88 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:02,870 INFO L82 PathProgramCache]: Analyzing trace with hash -911821031, now seen corresponding path program 86 times [2018-02-04 14:54:02,870 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:02,870 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:02,871 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:02,871 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:54:02,871 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:02,891 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 17373 backedges. 0 proven. 15138 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2018-02-04 14:54:05,164 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:05,164 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:05,168 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:54:05,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:54:05,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:54:05,221 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17373 backedges. 0 proven. 15138 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2018-02-04 14:54:05,326 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:05,326 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-02-04 14:54:05,326 INFO L409 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-02-04 14:54:05,327 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-02-04 14:54:05,327 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-02-04 14:54:05,327 INFO L87 Difference]: Start difference. First operand 509 states and 510 transitions. Second operand 90 states. [2018-02-04 14:54:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:06,852 INFO L93 Difference]: Finished difference Result 809 states and 867 transitions. [2018-02-04 14:54:06,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-02-04 14:54:06,852 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 508 [2018-02-04 14:54:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:06,853 INFO L225 Difference]: With dead ends: 809 [2018-02-04 14:54:06,853 INFO L226 Difference]: Without dead ends: 809 [2018-02-04 14:54:06,853 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-02-04 14:54:06,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2018-02-04 14:54:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 513. [2018-02-04 14:54:06,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-02-04 14:54:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 514 transitions. [2018-02-04 14:54:06,856 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 514 transitions. Word has length 508 [2018-02-04 14:54:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:06,856 INFO L432 AbstractCegarLoop]: Abstraction has 513 states and 514 transitions. [2018-02-04 14:54:06,856 INFO L433 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-02-04 14:54:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 514 transitions. [2018-02-04 14:54:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2018-02-04 14:54:06,857 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:06,858 INFO L351 BasicCegarLoop]: trace histogram [89, 88, 88, 88, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:06,858 INFO L371 AbstractCegarLoop]: === Iteration 89 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:06,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1207546350, now seen corresponding path program 87 times [2018-02-04 14:54:06,858 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:06,858 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:06,858 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:06,858 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:54:06,858 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:06,869 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17723 backedges. 0 proven. 15488 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2018-02-04 14:54:09,115 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:09,115 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:09,119 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:54:09,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-02-04 14:54:09,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:54:09,270 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17723 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 15488 trivial. 0 not checked. [2018-02-04 14:54:09,384 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:09,385 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 33] total 93 [2018-02-04 14:54:09,385 INFO L409 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-02-04 14:54:09,385 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-02-04 14:54:09,386 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4218, Invalid=4338, Unknown=0, NotChecked=0, Total=8556 [2018-02-04 14:54:09,386 INFO L87 Difference]: Start difference. First operand 513 states and 514 transitions. Second operand 93 states. [2018-02-04 14:54:10,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:10,920 INFO L93 Difference]: Finished difference Result 818 states and 876 transitions. [2018-02-04 14:54:10,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-02-04 14:54:10,954 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 512 [2018-02-04 14:54:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:10,955 INFO L225 Difference]: With dead ends: 818 [2018-02-04 14:54:10,955 INFO L226 Difference]: Without dead ends: 818 [2018-02-04 14:54:10,956 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6978, Invalid=8028, Unknown=0, NotChecked=0, Total=15006 [2018-02-04 14:54:10,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2018-02-04 14:54:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 522. [2018-02-04 14:54:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-02-04 14:54:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 523 transitions. [2018-02-04 14:54:10,958 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 523 transitions. Word has length 512 [2018-02-04 14:54:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:10,958 INFO L432 AbstractCegarLoop]: Abstraction has 522 states and 523 transitions. [2018-02-04 14:54:10,958 INFO L433 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-02-04 14:54:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 523 transitions. [2018-02-04 14:54:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2018-02-04 14:54:10,959 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:10,960 INFO L351 BasicCegarLoop]: trace histogram [90, 89, 89, 89, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:10,960 INFO L371 AbstractCegarLoop]: === Iteration 90 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash 137563735, now seen corresponding path program 88 times [2018-02-04 14:54:10,960 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:10,960 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:10,960 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:10,960 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:54:10,960 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:10,971 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18229 backedges. 0 proven. 15842 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2018-02-04 14:54:13,293 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:13,294 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:13,298 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:54:13,345 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:54:13,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:54:13,349 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 18229 backedges. 0 proven. 15842 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2018-02-04 14:54:13,460 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:13,460 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-02-04 14:54:13,461 INFO L409 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-02-04 14:54:13,461 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-02-04 14:54:13,461 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-02-04 14:54:13,461 INFO L87 Difference]: Start difference. First operand 522 states and 523 transitions. Second operand 92 states. [2018-02-04 14:54:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:14,651 INFO L93 Difference]: Finished difference Result 827 states and 886 transitions. [2018-02-04 14:54:14,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-02-04 14:54:14,652 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 521 [2018-02-04 14:54:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:14,653 INFO L225 Difference]: With dead ends: 827 [2018-02-04 14:54:14,653 INFO L226 Difference]: Without dead ends: 827 [2018-02-04 14:54:14,653 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-02-04 14:54:14,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2018-02-04 14:54:14,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 526. [2018-02-04 14:54:14,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2018-02-04 14:54:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 527 transitions. [2018-02-04 14:54:14,657 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 527 transitions. Word has length 521 [2018-02-04 14:54:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:14,657 INFO L432 AbstractCegarLoop]: Abstraction has 526 states and 527 transitions. [2018-02-04 14:54:14,657 INFO L433 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-02-04 14:54:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 527 transitions. [2018-02-04 14:54:14,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2018-02-04 14:54:14,660 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:14,660 INFO L351 BasicCegarLoop]: trace histogram [91, 90, 90, 90, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:14,660 INFO L371 AbstractCegarLoop]: === Iteration 91 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:14,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1360024574, now seen corresponding path program 89 times [2018-02-04 14:54:14,660 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:14,660 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:14,661 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:14,661 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:54:14,661 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:14,680 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 18587 backedges. 0 proven. 16200 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2018-02-04 14:54:17,052 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:17,052 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:17,056 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 14:54:24,076 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-02-04 14:54:24,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:54:24,084 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 18587 backedges. 0 proven. 16200 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2018-02-04 14:54:24,202 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:24,202 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-02-04 14:54:24,202 INFO L409 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-02-04 14:54:24,203 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-02-04 14:54:24,203 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-02-04 14:54:24,203 INFO L87 Difference]: Start difference. First operand 526 states and 527 transitions. Second operand 93 states. [2018-02-04 14:54:25,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:25,731 INFO L93 Difference]: Finished difference Result 836 states and 896 transitions. [2018-02-04 14:54:25,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-02-04 14:54:25,731 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 525 [2018-02-04 14:54:25,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:25,732 INFO L225 Difference]: With dead ends: 836 [2018-02-04 14:54:25,732 INFO L226 Difference]: Without dead ends: 836 [2018-02-04 14:54:25,732 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-02-04 14:54:25,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2018-02-04 14:54:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 530. [2018-02-04 14:54:25,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-02-04 14:54:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 531 transitions. [2018-02-04 14:54:25,734 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 531 transitions. Word has length 525 [2018-02-04 14:54:25,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:25,735 INFO L432 AbstractCegarLoop]: Abstraction has 530 states and 531 transitions. [2018-02-04 14:54:25,735 INFO L433 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-02-04 14:54:25,735 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 531 transitions. [2018-02-04 14:54:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2018-02-04 14:54:25,736 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:25,736 INFO L351 BasicCegarLoop]: trace histogram [92, 91, 91, 91, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:25,736 INFO L371 AbstractCegarLoop]: === Iteration 92 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:25,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1191940571, now seen corresponding path program 90 times [2018-02-04 14:54:25,736 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:25,737 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:25,737 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:25,737 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:54:25,737 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:25,748 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 18949 backedges. 0 proven. 16562 refuted. 0 times theorem prover too weak. 2387 trivial. 0 not checked. [2018-02-04 14:54:28,173 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:28,173 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:28,178 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 14:54:28,762 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2018-02-04 14:54:28,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:54:28,766 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18949 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 16562 trivial. 0 not checked. [2018-02-04 14:54:28,872 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:28,872 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 34] total 96 [2018-02-04 14:54:28,872 INFO L409 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-02-04 14:54:28,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-02-04 14:54:28,873 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4498, Invalid=4622, Unknown=0, NotChecked=0, Total=9120 [2018-02-04 14:54:28,873 INFO L87 Difference]: Start difference. First operand 530 states and 531 transitions. Second operand 96 states. [2018-02-04 14:54:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:30,533 INFO L93 Difference]: Finished difference Result 845 states and 905 transitions. [2018-02-04 14:54:30,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-02-04 14:54:30,533 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 529 [2018-02-04 14:54:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:30,534 INFO L225 Difference]: With dead ends: 845 [2018-02-04 14:54:30,534 INFO L226 Difference]: Without dead ends: 845 [2018-02-04 14:54:30,535 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=7443, Invalid=8559, Unknown=0, NotChecked=0, Total=16002 [2018-02-04 14:54:30,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2018-02-04 14:54:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 539. [2018-02-04 14:54:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2018-02-04 14:54:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 540 transitions. [2018-02-04 14:54:30,539 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 540 transitions. Word has length 529 [2018-02-04 14:54:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:30,539 INFO L432 AbstractCegarLoop]: Abstraction has 539 states and 540 transitions. [2018-02-04 14:54:30,539 INFO L433 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-02-04 14:54:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 540 transitions. [2018-02-04 14:54:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-02-04 14:54:30,541 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:30,542 INFO L351 BasicCegarLoop]: trace histogram [93, 92, 92, 92, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:30,542 INFO L371 AbstractCegarLoop]: === Iteration 93 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:30,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1667878218, now seen corresponding path program 91 times [2018-02-04 14:54:30,542 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:30,542 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:30,543 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:30,543 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:54:30,543 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:30,562 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:33,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19472 backedges. 0 proven. 16928 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2018-02-04 14:54:33,060 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:33,060 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:33,065 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:54:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:33,115 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 19472 backedges. 0 proven. 16928 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2018-02-04 14:54:33,229 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:33,229 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-02-04 14:54:33,230 INFO L409 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-02-04 14:54:33,230 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-02-04 14:54:33,230 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-02-04 14:54:33,231 INFO L87 Difference]: Start difference. First operand 539 states and 540 transitions. Second operand 95 states. [2018-02-04 14:54:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:34,432 INFO L93 Difference]: Finished difference Result 854 states and 915 transitions. [2018-02-04 14:54:34,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-02-04 14:54:34,433 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 538 [2018-02-04 14:54:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:34,434 INFO L225 Difference]: With dead ends: 854 [2018-02-04 14:54:34,434 INFO L226 Difference]: Without dead ends: 854 [2018-02-04 14:54:34,434 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-02-04 14:54:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2018-02-04 14:54:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 543. [2018-02-04 14:54:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-02-04 14:54:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 544 transitions. [2018-02-04 14:54:34,436 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 544 transitions. Word has length 538 [2018-02-04 14:54:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:34,436 INFO L432 AbstractCegarLoop]: Abstraction has 543 states and 544 transitions. [2018-02-04 14:54:34,436 INFO L433 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-02-04 14:54:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 544 transitions. [2018-02-04 14:54:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-02-04 14:54:34,438 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:34,438 INFO L351 BasicCegarLoop]: trace histogram [94, 93, 93, 93, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:34,438 INFO L371 AbstractCegarLoop]: === Iteration 94 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash 376836079, now seen corresponding path program 92 times [2018-02-04 14:54:34,438 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:34,438 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:34,439 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:34,439 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 14:54:34,439 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:34,449 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 19842 backedges. 0 proven. 17298 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2018-02-04 14:54:37,020 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:37,020 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:37,034 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 14:54:37,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 14:54:37,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:54:37,090 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19842 backedges. 0 proven. 17298 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2018-02-04 14:54:37,211 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:37,211 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-02-04 14:54:37,212 INFO L409 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-02-04 14:54:37,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-02-04 14:54:37,212 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-02-04 14:54:37,213 INFO L87 Difference]: Start difference. First operand 543 states and 544 transitions. Second operand 96 states. [2018-02-04 14:54:38,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:38,774 INFO L93 Difference]: Finished difference Result 863 states and 925 transitions. [2018-02-04 14:54:38,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-02-04 14:54:38,774 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 542 [2018-02-04 14:54:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:38,775 INFO L225 Difference]: With dead ends: 863 [2018-02-04 14:54:38,775 INFO L226 Difference]: Without dead ends: 863 [2018-02-04 14:54:38,775 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-02-04 14:54:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-02-04 14:54:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 547. [2018-02-04 14:54:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2018-02-04 14:54:38,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 548 transitions. [2018-02-04 14:54:38,778 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 548 transitions. Word has length 542 [2018-02-04 14:54:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:38,778 INFO L432 AbstractCegarLoop]: Abstraction has 547 states and 548 transitions. [2018-02-04 14:54:38,778 INFO L433 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-02-04 14:54:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 548 transitions. [2018-02-04 14:54:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2018-02-04 14:54:38,779 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:38,780 INFO L351 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:38,780 INFO L371 AbstractCegarLoop]: === Iteration 95 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:38,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1237145432, now seen corresponding path program 93 times [2018-02-04 14:54:38,780 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:38,780 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:38,780 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:38,780 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:54:38,780 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:38,791 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20216 backedges. 0 proven. 17672 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2018-02-04 14:54:41,346 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:41,346 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:41,350 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 14:54:41,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-02-04 14:54:41,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:54:41,528 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20216 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 17672 trivial. 0 not checked. [2018-02-04 14:54:41,648 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:41,648 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 35] total 99 [2018-02-04 14:54:41,648 INFO L409 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-02-04 14:54:41,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-02-04 14:54:41,649 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4787, Invalid=4915, Unknown=0, NotChecked=0, Total=9702 [2018-02-04 14:54:41,649 INFO L87 Difference]: Start difference. First operand 547 states and 548 transitions. Second operand 99 states. [2018-02-04 14:54:43,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:43,464 INFO L93 Difference]: Finished difference Result 872 states and 934 transitions. [2018-02-04 14:54:43,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-02-04 14:54:43,464 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 546 [2018-02-04 14:54:43,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:43,465 INFO L225 Difference]: With dead ends: 872 [2018-02-04 14:54:43,465 INFO L226 Difference]: Without dead ends: 872 [2018-02-04 14:54:43,465 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7923, Invalid=9107, Unknown=0, NotChecked=0, Total=17030 [2018-02-04 14:54:43,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2018-02-04 14:54:43,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 556. [2018-02-04 14:54:43,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-02-04 14:54:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 557 transitions. [2018-02-04 14:54:43,467 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 557 transitions. Word has length 546 [2018-02-04 14:54:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:43,468 INFO L432 AbstractCegarLoop]: Abstraction has 556 states and 557 transitions. [2018-02-04 14:54:43,468 INFO L433 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-02-04 14:54:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 557 transitions. [2018-02-04 14:54:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-02-04 14:54:43,469 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:43,469 INFO L351 BasicCegarLoop]: trace histogram [96, 95, 95, 95, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:43,469 INFO L371 AbstractCegarLoop]: === Iteration 96 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1028577217, now seen corresponding path program 94 times [2018-02-04 14:54:43,469 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:43,470 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:43,470 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:43,470 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:54:43,470 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:43,481 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 14:54:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20756 backedges. 0 proven. 18050 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2018-02-04 14:54:46,149 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 14:54:46,149 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-04 14:54:46,154 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 14:54:46,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 14:54:46,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 14:54:46,209 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 14:54:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20756 backedges. 0 proven. 18050 refuted. 0 times theorem prover too weak. 2706 trivial. 0 not checked. [2018-02-04 14:54:46,358 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 14:54:46,358 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-02-04 14:54:46,390 INFO L409 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-02-04 14:54:46,391 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-02-04 14:54:46,391 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-02-04 14:54:46,391 INFO L87 Difference]: Start difference. First operand 556 states and 557 transitions. Second operand 98 states. [2018-02-04 14:54:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 14:54:47,756 INFO L93 Difference]: Finished difference Result 881 states and 944 transitions. [2018-02-04 14:54:47,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-02-04 14:54:47,756 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 555 [2018-02-04 14:54:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 14:54:47,757 INFO L225 Difference]: With dead ends: 881 [2018-02-04 14:54:47,757 INFO L226 Difference]: Without dead ends: 881 [2018-02-04 14:54:47,757 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-02-04 14:54:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2018-02-04 14:54:47,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 560. [2018-02-04 14:54:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2018-02-04 14:54:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 561 transitions. [2018-02-04 14:54:47,760 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 561 transitions. Word has length 555 [2018-02-04 14:54:47,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 14:54:47,760 INFO L432 AbstractCegarLoop]: Abstraction has 560 states and 561 transitions. [2018-02-04 14:54:47,760 INFO L433 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-02-04 14:54:47,760 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 561 transitions. [2018-02-04 14:54:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2018-02-04 14:54:47,762 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 14:54:47,762 INFO L351 BasicCegarLoop]: trace histogram [97, 96, 96, 96, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 14:54:47,762 INFO L371 AbstractCegarLoop]: === Iteration 97 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 14:54:47,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1845496920, now seen corresponding path program 95 times [2018-02-04 14:54:47,762 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 14:54:47,762 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 14:54:47,762 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:47,763 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 14:54:47,763 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 14:54:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 14:54:47,774 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. Received shutdown request... [2018-02-04 14:54:50,214 WARN L491 AbstractCegarLoop]: Verification canceled [2018-02-04 14:54:50,217 WARN L185 ceAbstractionStarter]: Timeout [2018-02-04 14:54:50,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 02:54:50 BoogieIcfgContainer [2018-02-04 14:54:50,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 14:54:50,218 INFO L168 Benchmark]: Toolchain (without parser) took 187874.33 ms. Allocated memory was 402.7 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 359.5 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 995.7 MB. Max. memory is 5.3 GB. [2018-02-04 14:54:50,219 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 402.7 MB. Free memory is still 364.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 14:54:50,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 135.42 ms. Allocated memory is still 402.7 MB. Free memory was 359.5 MB in the beginning and 351.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 5.3 GB. [2018-02-04 14:54:50,219 INFO L168 Benchmark]: Boogie Preprocessor took 19.24 ms. Allocated memory is still 402.7 MB. Free memory is still 351.6 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 14:54:50,219 INFO L168 Benchmark]: RCFGBuilder took 133.84 ms. Allocated memory is still 402.7 MB. Free memory was 351.6 MB in the beginning and 337.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 5.3 GB. [2018-02-04 14:54:50,219 INFO L168 Benchmark]: TraceAbstraction took 187582.79 ms. Allocated memory was 402.7 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 337.6 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 973.8 MB. Max. memory is 5.3 GB. [2018-02-04 14:54:50,220 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 402.7 MB. Free memory is still 364.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 135.42 ms. Allocated memory is still 402.7 MB. Free memory was 359.5 MB in the beginning and 351.6 MB in the end (delta: 7.9 MB). Peak memory consumption was 7.9 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 19.24 ms. Allocated memory is still 402.7 MB. Free memory is still 351.6 MB. There was no memory consumed. Max. memory is 5.3 GB. * RCFGBuilder took 133.84 ms. Allocated memory is still 402.7 MB. Free memory was 351.6 MB in the beginning and 337.6 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 5.3 GB. * TraceAbstraction took 187582.79 ms. Allocated memory was 402.7 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 337.6 MB in the beginning and 1.4 GB in the end (delta: -1.0 GB). Peak memory consumption was 973.8 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 13). Cancelled while BasicCegarLoop was analyzing trace of length 560 with TraceHistMax 97, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 93 known predicates. - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 15). Cancelled while BasicCegarLoop was analyzing trace of length 560 with TraceHistMax 97, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 93 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 2 error locations. TIMEOUT Result, 187.5s OverallTime, 97 OverallIterations, 97 TraceHistogramMax, 53.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 939 SDtfs, 45699 SDslu, 19471 SDs, 0 SdLazy, 39052 SolverSat, 15177 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33054 GetRequests, 27806 SyntacticMatches, 1 SemanticMatches, 5247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11550 ImplicationChecksByTransitivity, 64.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=560occurred in iteration=96, 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, 96 MinimizatonAttempts, 15605 StatesRemovedByMinimization, 95 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 32.1s SatisfiabilityAnalysisTime, 92.2s InterpolantComputationTime, 54516 NumberOfCodeBlocks, 51568 NumberOfCodeBlocksAsserted, 1724 NumberOfCheckSat, 54326 ConstructedInterpolants, 0 QuantifiedInterpolants, 45286120 SizeOfPredicates, 63 NumberOfNonLiveVariables, 47388 ConjunctsInSsa, 3817 ConjunctsInUnsatCore, 190 InterpolantComputations, 2 PerfectInterpolantSequences, 340594/1336702 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/array3_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-04_14-54-50-225.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/array3_false-valid-deref.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-04_14-54-50-225.csv Completed graceful shutdown