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-ccafca9-m [2018-02-04 01:37:41,700 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-04 01:37:41,701 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-04 01:37:41,711 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-04 01:37:41,711 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-04 01:37:41,712 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-04 01:37:41,712 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-04 01:37:41,713 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-04 01:37:41,715 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-04 01:37:41,715 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-04 01:37:41,716 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-04 01:37:41,716 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-04 01:37:41,717 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-04 01:37:41,718 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-04 01:37:41,719 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-04 01:37:41,721 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-04 01:37:41,722 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-04 01:37:41,724 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-04 01:37:41,725 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-04 01:37:41,726 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-04 01:37:41,728 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-02-04 01:37:41,732 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 01:37:41,742 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-04 01:37:41,742 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-04 01:37:41,743 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-04 01:37:41,743 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-04 01:37:41,743 INFO L133 SettingsManager]: * Use SBE=true [2018-02-04 01:37:41,743 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-04 01:37:41,744 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-04 01:37:41,744 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-04 01:37:41,744 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-04 01:37:41,744 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-04 01:37:41,744 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-04 01:37:41,744 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-04 01:37:41,744 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-04 01:37:41,745 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-04 01:37:41,745 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-04 01:37:41,745 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-04 01:37:41,745 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-04 01:37:41,745 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-04 01:37:41,745 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-04 01:37:41,746 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-04 01:37:41,746 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-04 01:37:41,746 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-04 01:37:41,746 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-04 01:37:41,746 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-04 01:37:41,746 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-04 01:37:41,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-04 01:37:41,788 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-04 01:37:41,791 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-04 01:37:41,792 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-04 01:37:41,793 INFO L276 PluginConnector]: CDTParser initialized [2018-02-04 01:37:41,793 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array3_false-valid-deref.i [2018-02-04 01:37:41,890 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-04 01:37:41,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-04 01:37:41,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-04 01:37:41,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-04 01:37:41,897 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-04 01:37:41,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 01:37:41" (1/1) ... [2018-02-04 01:37:41,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@265a29fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:41, skipping insertion in model container [2018-02-04 01:37:41,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.02 01:37:41" (1/1) ... [2018-02-04 01:37:41,910 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 01:37:41,922 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-04 01:37:42,001 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 01:37:42,008 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-04 01:37:42,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42 WrapperNode [2018-02-04 01:37:42,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-04 01:37:42,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-04 01:37:42,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-04 01:37:42,012 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-04 01:37:42,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42" (1/1) ... [2018-02-04 01:37:42,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42" (1/1) ... [2018-02-04 01:37:42,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42" (1/1) ... [2018-02-04 01:37:42,025 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42" (1/1) ... [2018-02-04 01:37:42,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42" (1/1) ... [2018-02-04 01:37:42,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42" (1/1) ... [2018-02-04 01:37:42,029 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42" (1/1) ... [2018-02-04 01:37:42,030 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-04 01:37:42,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-04 01:37:42,031 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-04 01:37:42,031 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-04 01:37:42,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42" (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 01:37:42,069 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-04 01:37:42,069 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-04 01:37:42,069 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-02-04 01:37:42,069 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-04 01:37:42,069 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-02-04 01:37:42,069 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-02-04 01:37:42,069 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-02-04 01:37:42,069 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-04 01:37:42,069 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-04 01:37:42,069 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-04 01:37:42,151 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-04 01:37:42,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 01:37:42 BoogieIcfgContainer [2018-02-04 01:37:42,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-04 01:37:42,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-04 01:37:42,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-04 01:37:42,154 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-04 01:37:42,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.02 01:37:41" (1/3) ... [2018-02-04 01:37:42,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4fc820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 01:37:42, skipping insertion in model container [2018-02-04 01:37:42,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.02 01:37:42" (2/3) ... [2018-02-04 01:37:42,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4fc820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.02 01:37:42, skipping insertion in model container [2018-02-04 01:37:42,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.02 01:37:42" (3/3) ... [2018-02-04 01:37:42,157 INFO L107 eAbstractionObserver]: Analyzing ICFG array3_false-valid-deref.i [2018-02-04 01:37:42,163 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-04 01:37:42,167 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-02-04 01:37:42,190 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-04 01:37:42,190 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-04 01:37:42,190 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-04 01:37:42,191 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-04 01:37:42,191 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-04 01:37:42,191 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-04 01:37:42,191 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-04 01:37:42,191 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-04 01:37:42,191 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-04 01:37:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-02-04 01:37:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-02-04 01:37:42,206 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:42,207 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-02-04 01:37:42,207 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:42,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1213833872, now seen corresponding path program 1 times [2018-02-04 01:37:42,212 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:42,212 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:42,242 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:42,242 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:42,242 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:42,268 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:42,331 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 01:37:42,333 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 01:37:42,334 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-02-04 01:37:42,335 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-04 01:37:42,348 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-04 01:37:42,348 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-04 01:37:42,351 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 4 states. [2018-02-04 01:37:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:42,456 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2018-02-04 01:37:42,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-04 01:37:42,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-02-04 01:37:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:42,462 INFO L225 Difference]: With dead ends: 44 [2018-02-04 01:37:42,463 INFO L226 Difference]: Without dead ends: 31 [2018-02-04 01:37:42,464 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 01:37:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-02-04 01:37:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-02-04 01:37:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-02-04 01:37:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-02-04 01:37:42,484 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 8 [2018-02-04 01:37:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:42,485 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-02-04 01:37:42,485 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-04 01:37:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-02-04 01:37:42,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-02-04 01:37:42,485 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:42,485 INFO L351 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-02-04 01:37:42,485 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash -863334142, now seen corresponding path program 1 times [2018-02-04 01:37:42,486 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:42,486 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:42,486 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:42,486 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:42,486 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:42,533 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:42,576 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 01:37:42,576 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-04 01:37:42,576 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-04 01:37:42,578 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 01:37:42,578 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 01:37:42,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-02-04 01:37:42,578 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 5 states. [2018-02-04 01:37:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:42,630 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2018-02-04 01:37:42,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 01:37:42,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-02-04 01:37:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:42,631 INFO L225 Difference]: With dead ends: 30 [2018-02-04 01:37:42,632 INFO L226 Difference]: Without dead ends: 30 [2018-02-04 01:37:42,632 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 01:37:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-02-04 01:37:42,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-02-04 01:37:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-02-04 01:37:42,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-02-04 01:37:42,636 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 16 [2018-02-04 01:37:42,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:42,636 INFO L432 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-02-04 01:37:42,636 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 01:37:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-02-04 01:37:42,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-02-04 01:37:42,637 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:42,637 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 01:37:42,637 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1135364244, now seen corresponding path program 1 times [2018-02-04 01:37:42,638 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:42,638 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:42,639 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:42,639 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:42,639 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:42,650 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:42,705 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 01:37:42,705 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:42,705 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 01:37:42,712 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:42,726 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:42,740 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 01:37:42,757 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:42,757 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-02-04 01:37:42,757 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-04 01:37:42,758 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-04 01:37:42,758 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-02-04 01:37:42,758 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 5 states. [2018-02-04 01:37:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:42,812 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2018-02-04 01:37:42,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-04 01:37:42,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-02-04 01:37:42,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:42,812 INFO L225 Difference]: With dead ends: 44 [2018-02-04 01:37:42,813 INFO L226 Difference]: Without dead ends: 44 [2018-02-04 01:37:42,813 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 01:37:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-02-04 01:37:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 33. [2018-02-04 01:37:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-02-04 01:37:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-02-04 01:37:42,816 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-02-04 01:37:42,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:42,816 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-02-04 01:37:42,816 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-04 01:37:42,816 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-02-04 01:37:42,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-02-04 01:37:42,817 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:42,817 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 01:37:42,817 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1230203493, now seen corresponding path program 2 times [2018-02-04 01:37:42,817 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:42,817 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:42,818 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:42,818 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:42,818 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:42,828 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:42,869 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 01:37:42,869 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:42,869 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 01:37:42,878 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:37:42,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:37:42,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:42,902 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:42,908 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 01:37:42,928 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:42,928 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-02-04 01:37:42,929 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-04 01:37:42,929 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-04 01:37:42,929 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-02-04 01:37:42,929 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 6 states. [2018-02-04 01:37:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:42,991 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-02-04 01:37:42,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-04 01:37:42,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-02-04 01:37:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:42,993 INFO L225 Difference]: With dead ends: 53 [2018-02-04 01:37:42,993 INFO L226 Difference]: Without dead ends: 53 [2018-02-04 01:37:42,993 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 01:37:42,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-02-04 01:37:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2018-02-04 01:37:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-02-04 01:37:42,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-02-04 01:37:42,997 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2018-02-04 01:37:42,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:42,997 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-02-04 01:37:42,997 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-04 01:37:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-02-04 01:37:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-02-04 01:37:42,998 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:42,998 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 01:37:42,998 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:42,998 INFO L82 PathProgramCache]: Analyzing trace with hash 417265886, now seen corresponding path program 3 times [2018-02-04 01:37:42,999 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:42,999 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:43,000 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,000 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:43,000 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:43,010 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:43,055 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 01:37:43,056 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:43,056 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 01:37:43,064 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:37:43,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-02-04 01:37:43,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:43,075 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:43,094 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 01:37:43,114 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:43,114 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2018-02-04 01:37:43,115 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-04 01:37:43,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-04 01:37:43,115 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2018-02-04 01:37:43,115 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 9 states. [2018-02-04 01:37:43,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:43,181 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-02-04 01:37:43,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-04 01:37:43,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2018-02-04 01:37:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:43,182 INFO L225 Difference]: With dead ends: 62 [2018-02-04 01:37:43,182 INFO L226 Difference]: Without dead ends: 62 [2018-02-04 01:37:43,182 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 01:37:43,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-02-04 01:37:43,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2018-02-04 01:37:43,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-02-04 01:37:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-02-04 01:37:43,186 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 36 [2018-02-04 01:37:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:43,186 INFO L432 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-02-04 01:37:43,186 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-04 01:37:43,186 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-02-04 01:37:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-02-04 01:37:43,187 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:43,187 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 01:37:43,187 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash 576961419, now seen corresponding path program 4 times [2018-02-04 01:37:43,188 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:43,188 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:43,188 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,189 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:43,189 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:43,200 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:43,265 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 01:37:43,266 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:43,266 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 01:37:43,274 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:37:43,287 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:37:43,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:43,289 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:43,294 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 01:37:43,311 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:43,311 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-02-04 01:37:43,311 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-04 01:37:43,312 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-04 01:37:43,312 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-02-04 01:37:43,312 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 8 states. [2018-02-04 01:37:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:43,365 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2018-02-04 01:37:43,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-04 01:37:43,366 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2018-02-04 01:37:43,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:43,366 INFO L225 Difference]: With dead ends: 71 [2018-02-04 01:37:43,366 INFO L226 Difference]: Without dead ends: 71 [2018-02-04 01:37:43,367 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 01:37:43,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-02-04 01:37:43,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 50. [2018-02-04 01:37:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-02-04 01:37:43,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2018-02-04 01:37:43,369 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2018-02-04 01:37:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:43,369 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2018-02-04 01:37:43,369 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-04 01:37:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2018-02-04 01:37:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-02-04 01:37:43,370 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:43,370 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 01:37:43,370 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash -194823758, now seen corresponding path program 5 times [2018-02-04 01:37:43,370 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:43,370 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:43,371 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,371 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:43,371 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:43,380 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:43,436 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 01:37:43,436 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:43,437 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 01:37:43,445 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:37:43,475 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-02-04 01:37:43,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:43,478 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:43,489 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 01:37:43,508 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:43,509 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-02-04 01:37:43,509 INFO L409 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-02-04 01:37:43,509 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-02-04 01:37:43,509 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-02-04 01:37:43,509 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 9 states. [2018-02-04 01:37:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:43,584 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2018-02-04 01:37:43,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-04 01:37:43,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2018-02-04 01:37:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:43,587 INFO L225 Difference]: With dead ends: 80 [2018-02-04 01:37:43,587 INFO L226 Difference]: Without dead ends: 80 [2018-02-04 01:37:43,587 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 01:37:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-02-04 01:37:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2018-02-04 01:37:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-02-04 01:37:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-02-04 01:37:43,592 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2018-02-04 01:37:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:43,592 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-02-04 01:37:43,592 INFO L433 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-02-04 01:37:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-02-04 01:37:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-02-04 01:37:43,593 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:43,593 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 01:37:43,593 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:43,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1600566183, now seen corresponding path program 6 times [2018-02-04 01:37:43,594 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:43,594 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:43,595 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,595 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:43,595 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:43,605 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:43,663 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 01:37:43,663 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:43,663 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 01:37:43,668 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:37:43,680 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-02-04 01:37:43,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:43,681 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:43,703 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 01:37:43,719 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:43,720 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2018-02-04 01:37:43,720 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-02-04 01:37:43,720 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-02-04 01:37:43,720 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2018-02-04 01:37:43,720 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 12 states. [2018-02-04 01:37:43,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:43,836 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-02-04 01:37:43,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-02-04 01:37:43,836 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2018-02-04 01:37:43,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:43,837 INFO L225 Difference]: With dead ends: 89 [2018-02-04 01:37:43,837 INFO L226 Difference]: Without dead ends: 89 [2018-02-04 01:37:43,837 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 01:37:43,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-02-04 01:37:43,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2018-02-04 01:37:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-02-04 01:37:43,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-02-04 01:37:43,841 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2018-02-04 01:37:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:43,842 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-02-04 01:37:43,842 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-02-04 01:37:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-02-04 01:37:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-02-04 01:37:43,843 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:43,843 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 01:37:43,843 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1495641218, now seen corresponding path program 7 times [2018-02-04 01:37:43,843 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:43,843 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:43,844 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,844 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:43,844 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:43,862 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:43,963 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 01:37:43,964 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:43,964 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 01:37:43,972 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:43,990 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:43,998 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 01:37:44,016 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:44,016 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-02-04 01:37:44,017 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-02-04 01:37:44,017 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-02-04 01:37:44,017 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-02-04 01:37:44,017 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 11 states. [2018-02-04 01:37:44,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:44,067 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2018-02-04 01:37:44,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-02-04 01:37:44,068 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2018-02-04 01:37:44,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:44,068 INFO L225 Difference]: With dead ends: 98 [2018-02-04 01:37:44,068 INFO L226 Difference]: Without dead ends: 98 [2018-02-04 01:37:44,069 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 01:37:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-02-04 01:37:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 67. [2018-02-04 01:37:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-02-04 01:37:44,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-02-04 01:37:44,072 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2018-02-04 01:37:44,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:44,073 INFO L432 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-02-04 01:37:44,073 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-02-04 01:37:44,073 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-02-04 01:37:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-02-04 01:37:44,073 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:44,073 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 01:37:44,073 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:44,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1534369477, now seen corresponding path program 8 times [2018-02-04 01:37:44,074 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:44,074 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:44,074 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:44,074 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:44,074 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:44,085 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:44,162 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 01:37:44,162 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:44,162 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 01:37:44,167 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:37:44,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:37:44,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:44,186 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:44,196 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 01:37:44,225 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:44,226 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-02-04 01:37:44,226 INFO L409 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-02-04 01:37:44,226 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-02-04 01:37:44,226 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-02-04 01:37:44,226 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 12 states. [2018-02-04 01:37:44,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:44,318 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2018-02-04 01:37:44,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-04 01:37:44,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2018-02-04 01:37:44,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:44,319 INFO L225 Difference]: With dead ends: 107 [2018-02-04 01:37:44,319 INFO L226 Difference]: Without dead ends: 107 [2018-02-04 01:37:44,320 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 01:37:44,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-02-04 01:37:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2018-02-04 01:37:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-02-04 01:37:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-02-04 01:37:44,324 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 66 [2018-02-04 01:37:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:44,324 INFO L432 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-02-04 01:37:44,324 INFO L433 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-02-04 01:37:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-02-04 01:37:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-02-04 01:37:44,325 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:44,325 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 01:37:44,325 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:44,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1473900172, now seen corresponding path program 9 times [2018-02-04 01:37:44,325 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:44,325 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:44,326 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:44,326 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:44,326 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:44,335 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:44,408 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 01:37:44,408 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:44,408 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 01:37:44,413 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:37:44,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-02-04 01:37:44,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:44,429 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:44,455 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 01:37:44,486 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:44,487 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 15 [2018-02-04 01:37:44,487 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-04 01:37:44,487 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-04 01:37:44,487 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=113, Unknown=0, NotChecked=0, Total=210 [2018-02-04 01:37:44,488 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 15 states. [2018-02-04 01:37:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:44,615 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-02-04 01:37:44,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-04 01:37:44,615 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2018-02-04 01:37:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:44,615 INFO L225 Difference]: With dead ends: 116 [2018-02-04 01:37:44,615 INFO L226 Difference]: Without dead ends: 116 [2018-02-04 01:37:44,616 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 01:37:44,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-02-04 01:37:44,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2018-02-04 01:37:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-02-04 01:37:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-02-04 01:37:44,621 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 70 [2018-02-04 01:37:44,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:44,621 INFO L432 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-02-04 01:37:44,621 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-04 01:37:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-02-04 01:37:44,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-02-04 01:37:44,621 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:44,621 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 01:37:44,621 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:44,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1757583627, now seen corresponding path program 10 times [2018-02-04 01:37:44,622 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:44,622 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:44,622 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:44,622 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:44,622 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:44,628 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:44,727 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 01:37:44,727 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:44,727 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 01:37:44,732 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:37:44,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:37:44,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:44,746 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:44,753 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 01:37:44,770 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:44,770 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-02-04 01:37:44,771 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-02-04 01:37:44,771 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-02-04 01:37:44,771 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-02-04 01:37:44,771 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 14 states. [2018-02-04 01:37:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:44,826 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2018-02-04 01:37:44,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-04 01:37:44,826 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2018-02-04 01:37:44,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:44,827 INFO L225 Difference]: With dead ends: 125 [2018-02-04 01:37:44,827 INFO L226 Difference]: Without dead ends: 125 [2018-02-04 01:37:44,827 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 01:37:44,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-02-04 01:37:44,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2018-02-04 01:37:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-02-04 01:37:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-02-04 01:37:44,835 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2018-02-04 01:37:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:44,835 INFO L432 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-02-04 01:37:44,835 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-02-04 01:37:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-02-04 01:37:44,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-02-04 01:37:44,836 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:44,836 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 01:37:44,836 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:44,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2099078308, now seen corresponding path program 11 times [2018-02-04 01:37:44,836 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:44,837 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:44,837 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:44,837 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:44,837 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:44,845 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:44,945 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 01:37:44,946 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:44,946 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 01:37:44,951 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:37:44,980 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-02-04 01:37:44,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:44,982 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:44,994 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 01:37:45,012 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:45,013 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-02-04 01:37:45,013 INFO L409 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-02-04 01:37:45,013 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-02-04 01:37:45,013 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-02-04 01:37:45,013 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 15 states. [2018-02-04 01:37:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:45,077 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2018-02-04 01:37:45,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-02-04 01:37:45,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2018-02-04 01:37:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:45,078 INFO L225 Difference]: With dead ends: 134 [2018-02-04 01:37:45,078 INFO L226 Difference]: Without dead ends: 134 [2018-02-04 01:37:45,078 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 01:37:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-02-04 01:37:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 88. [2018-02-04 01:37:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-02-04 01:37:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-02-04 01:37:45,082 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2018-02-04 01:37:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:45,082 INFO L432 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-02-04 01:37:45,082 INFO L433 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-02-04 01:37:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-02-04 01:37:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-02-04 01:37:45,083 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:45,083 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 01:37:45,083 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:45,083 INFO L82 PathProgramCache]: Analyzing trace with hash -159824829, now seen corresponding path program 12 times [2018-02-04 01:37:45,083 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:45,083 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:45,084 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:45,084 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:45,084 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:45,094 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:45,193 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 01:37:45,193 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:45,193 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 01:37:45,198 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:37:45,213 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-02-04 01:37:45,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:45,214 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:45,230 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 01:37:45,247 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:45,247 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 18 [2018-02-04 01:37:45,247 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-02-04 01:37:45,247 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-02-04 01:37:45,247 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=163, Unknown=0, NotChecked=0, Total=306 [2018-02-04 01:37:45,248 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 18 states. [2018-02-04 01:37:45,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:45,347 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2018-02-04 01:37:45,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-02-04 01:37:45,347 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2018-02-04 01:37:45,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:45,348 INFO L225 Difference]: With dead ends: 143 [2018-02-04 01:37:45,348 INFO L226 Difference]: Without dead ends: 143 [2018-02-04 01:37:45,348 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=228, Invalid=278, Unknown=0, NotChecked=0, Total=506 [2018-02-04 01:37:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-02-04 01:37:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 97. [2018-02-04 01:37:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-02-04 01:37:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-02-04 01:37:45,350 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 87 [2018-02-04 01:37:45,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:45,350 INFO L432 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-02-04 01:37:45,350 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-02-04 01:37:45,350 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-02-04 01:37:45,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-02-04 01:37:45,351 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:45,351 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 01:37:45,351 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2110093160, now seen corresponding path program 13 times [2018-02-04 01:37:45,351 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:45,351 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:45,351 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:45,351 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:45,352 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:45,363 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:45,503 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 01:37:45,503 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:45,503 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 01:37:45,508 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:45,524 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:45,537 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 01:37:45,555 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:45,555 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-02-04 01:37:45,555 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-02-04 01:37:45,555 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-02-04 01:37:45,556 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-02-04 01:37:45,556 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 17 states. [2018-02-04 01:37:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:45,646 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2018-02-04 01:37:45,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-02-04 01:37:45,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2018-02-04 01:37:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:45,647 INFO L225 Difference]: With dead ends: 152 [2018-02-04 01:37:45,647 INFO L226 Difference]: Without dead ends: 152 [2018-02-04 01:37:45,647 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-02-04 01:37:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-02-04 01:37:45,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 101. [2018-02-04 01:37:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-02-04 01:37:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-02-04 01:37:45,649 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2018-02-04 01:37:45,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:45,650 INFO L432 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-02-04 01:37:45,650 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-02-04 01:37:45,650 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-02-04 01:37:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-02-04 01:37:45,650 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:45,651 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 01:37:45,651 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:45,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1842728721, now seen corresponding path program 14 times [2018-02-04 01:37:45,651 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:45,651 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:45,652 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:45,652 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:45,652 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:45,662 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:45,809 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 01:37:45,810 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:45,810 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 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 01:37:45,814 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:37:45,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:37:45,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:45,828 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:45,837 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 01:37:45,863 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:45,863 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-02-04 01:37:45,864 INFO L409 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-02-04 01:37:45,864 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-02-04 01:37:45,864 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-02-04 01:37:45,864 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 18 states. [2018-02-04 01:37:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:45,944 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2018-02-04 01:37:45,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-02-04 01:37:45,945 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 100 [2018-02-04 01:37:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:45,945 INFO L225 Difference]: With dead ends: 161 [2018-02-04 01:37:45,945 INFO L226 Difference]: Without dead ends: 161 [2018-02-04 01:37:45,946 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-02-04 01:37:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-02-04 01:37:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 105. [2018-02-04 01:37:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-02-04 01:37:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-02-04 01:37:45,947 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-02-04 01:37:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:45,948 INFO L432 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-02-04 01:37:45,948 INFO L433 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-02-04 01:37:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-02-04 01:37:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-02-04 01:37:45,948 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:45,949 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 01:37:45,949 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:45,949 INFO L82 PathProgramCache]: Analyzing trace with hash -184078070, now seen corresponding path program 15 times [2018-02-04 01:37:45,949 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:45,949 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:45,949 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:45,949 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:45,949 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:45,956 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:46,099 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 01:37:46,099 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:46,099 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 01:37:46,104 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:37:46,118 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-02-04 01:37:46,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:46,120 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:46,166 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 01:37:46,198 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:46,198 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 21 [2018-02-04 01:37:46,199 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-02-04 01:37:46,199 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-02-04 01:37:46,199 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=222, Unknown=0, NotChecked=0, Total=420 [2018-02-04 01:37:46,199 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 21 states. [2018-02-04 01:37:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:46,348 INFO L93 Difference]: Finished difference Result 170 states and 180 transitions. [2018-02-04 01:37:46,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-02-04 01:37:46,348 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2018-02-04 01:37:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:46,348 INFO L225 Difference]: With dead ends: 170 [2018-02-04 01:37:46,349 INFO L226 Difference]: Without dead ends: 170 [2018-02-04 01:37:46,349 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 01:37:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-02-04 01:37:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 114. [2018-02-04 01:37:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-02-04 01:37:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-02-04 01:37:46,351 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 104 [2018-02-04 01:37:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:46,351 INFO L432 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-02-04 01:37:46,351 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-02-04 01:37:46,351 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-02-04 01:37:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-02-04 01:37:46,352 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:46,352 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 01:37:46,352 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:46,352 INFO L82 PathProgramCache]: Analyzing trace with hash 950262623, now seen corresponding path program 16 times [2018-02-04 01:37:46,352 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:46,353 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:46,353 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:46,353 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:46,353 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:46,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:46,362 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:46,495 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 01:37:46,495 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:46,495 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 01:37:46,500 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:37:46,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:37:46,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:46,518 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:46,534 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 01:37:46,558 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:46,558 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-02-04 01:37:46,558 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-02-04 01:37:46,558 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-02-04 01:37:46,558 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-02-04 01:37:46,558 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 20 states. [2018-02-04 01:37:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:46,683 INFO L93 Difference]: Finished difference Result 179 states and 190 transitions. [2018-02-04 01:37:46,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-02-04 01:37:46,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2018-02-04 01:37:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:46,683 INFO L225 Difference]: With dead ends: 179 [2018-02-04 01:37:46,684 INFO L226 Difference]: Without dead ends: 179 [2018-02-04 01:37:46,684 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 01:37:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-02-04 01:37:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 118. [2018-02-04 01:37:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-02-04 01:37:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-02-04 01:37:46,685 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2018-02-04 01:37:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:46,686 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-02-04 01:37:46,686 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-02-04 01:37:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-02-04 01:37:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-02-04 01:37:46,686 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:46,686 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 01:37:46,686 INFO L371 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:46,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1664169478, now seen corresponding path program 17 times [2018-02-04 01:37:46,686 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:46,686 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:46,687 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:46,687 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:46,687 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:46,693 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:46,834 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 01:37:46,834 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:46,834 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 01:37:46,840 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:37:46,891 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-02-04 01:37:46,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:46,893 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:46,912 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 01:37:46,932 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:46,932 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-02-04 01:37:46,932 INFO L409 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-02-04 01:37:46,932 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-02-04 01:37:46,933 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-02-04 01:37:46,933 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 21 states. [2018-02-04 01:37:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:47,071 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2018-02-04 01:37:47,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-02-04 01:37:47,072 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 117 [2018-02-04 01:37:47,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:47,072 INFO L225 Difference]: With dead ends: 188 [2018-02-04 01:37:47,072 INFO L226 Difference]: Without dead ends: 188 [2018-02-04 01:37:47,073 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 01:37:47,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-02-04 01:37:47,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 122. [2018-02-04 01:37:47,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-02-04 01:37:47,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2018-02-04 01:37:47,076 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 117 [2018-02-04 01:37:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:47,076 INFO L432 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2018-02-04 01:37:47,076 INFO L433 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-02-04 01:37:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2018-02-04 01:37:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-02-04 01:37:47,077 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:47,077 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 01:37:47,077 INFO L371 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2092098861, now seen corresponding path program 18 times [2018-02-04 01:37:47,077 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:47,077 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:47,078 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:47,078 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:47,078 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:47,088 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:47,258 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 01:37:47,258 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:47,258 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 01:37:47,264 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:37:47,287 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-02-04 01:37:47,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:47,288 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:47,306 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 01:37:47,323 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:47,323 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 24 [2018-02-04 01:37:47,323 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-02-04 01:37:47,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-02-04 01:37:47,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=290, Unknown=0, NotChecked=0, Total=552 [2018-02-04 01:37:47,323 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 24 states. [2018-02-04 01:37:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:47,508 INFO L93 Difference]: Finished difference Result 197 states and 209 transitions. [2018-02-04 01:37:47,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-02-04 01:37:47,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2018-02-04 01:37:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:47,509 INFO L225 Difference]: With dead ends: 197 [2018-02-04 01:37:47,509 INFO L226 Difference]: Without dead ends: 197 [2018-02-04 01:37:47,510 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 01:37:47,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-02-04 01:37:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 131. [2018-02-04 01:37:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-02-04 01:37:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-02-04 01:37:47,512 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 121 [2018-02-04 01:37:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:47,512 INFO L432 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-02-04 01:37:47,512 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-02-04 01:37:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-02-04 01:37:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-02-04 01:37:47,513 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:47,513 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 01:37:47,513 INFO L371 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash 734718894, now seen corresponding path program 19 times [2018-02-04 01:37:47,513 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:47,513 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:47,513 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:47,513 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:47,514 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:47,522 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:47,706 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 01:37:47,706 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:47,706 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 01:37:47,711 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:47,724 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:47,735 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 01:37:47,752 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:47,753 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-02-04 01:37:47,753 INFO L409 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-02-04 01:37:47,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-02-04 01:37:47,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-02-04 01:37:47,753 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 23 states. [2018-02-04 01:37:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:47,855 INFO L93 Difference]: Finished difference Result 206 states and 219 transitions. [2018-02-04 01:37:47,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-02-04 01:37:47,856 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2018-02-04 01:37:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:47,856 INFO L225 Difference]: With dead ends: 206 [2018-02-04 01:37:47,856 INFO L226 Difference]: Without dead ends: 206 [2018-02-04 01:37:47,857 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 01:37:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-02-04 01:37:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 135. [2018-02-04 01:37:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-02-04 01:37:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-02-04 01:37:47,858 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 130 [2018-02-04 01:37:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:47,858 INFO L432 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-02-04 01:37:47,859 INFO L433 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-02-04 01:37:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-02-04 01:37:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-02-04 01:37:47,859 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:47,859 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 01:37:47,859 INFO L371 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:47,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1367823335, now seen corresponding path program 20 times [2018-02-04 01:37:47,859 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:47,859 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:47,860 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:47,860 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:47,860 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:47,868 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:48,026 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 01:37:48,026 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:48,026 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 01:37:48,031 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:37:48,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:37:48,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:48,048 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:48,060 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 01:37:48,078 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:48,078 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-02-04 01:37:48,078 INFO L409 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-02-04 01:37:48,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-02-04 01:37:48,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-02-04 01:37:48,079 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 24 states. [2018-02-04 01:37:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:48,181 INFO L93 Difference]: Finished difference Result 215 states and 229 transitions. [2018-02-04 01:37:48,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-02-04 01:37:48,182 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 134 [2018-02-04 01:37:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:48,183 INFO L225 Difference]: With dead ends: 215 [2018-02-04 01:37:48,183 INFO L226 Difference]: Without dead ends: 215 [2018-02-04 01:37:48,183 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 01:37:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-02-04 01:37:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 139. [2018-02-04 01:37:48,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-02-04 01:37:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-02-04 01:37:48,186 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2018-02-04 01:37:48,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:48,186 INFO L432 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-02-04 01:37:48,186 INFO L433 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-02-04 01:37:48,186 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-02-04 01:37:48,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-02-04 01:37:48,187 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:48,187 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 01:37:48,187 INFO L371 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:48,187 INFO L82 PathProgramCache]: Analyzing trace with hash -168626272, now seen corresponding path program 21 times [2018-02-04 01:37:48,187 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:48,187 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:48,188 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:48,188 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:48,188 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:48,198 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:48,419 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 01:37:48,419 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:48,419 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 01:37:48,424 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:37:48,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-02-04 01:37:48,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:48,441 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:48,463 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 01:37:48,480 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:48,480 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11] total 27 [2018-02-04 01:37:48,480 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-02-04 01:37:48,480 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-02-04 01:37:48,480 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=367, Unknown=0, NotChecked=0, Total=702 [2018-02-04 01:37:48,480 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 27 states. [2018-02-04 01:37:48,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:48,644 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2018-02-04 01:37:48,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-02-04 01:37:48,644 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 138 [2018-02-04 01:37:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:48,645 INFO L225 Difference]: With dead ends: 224 [2018-02-04 01:37:48,645 INFO L226 Difference]: Without dead ends: 224 [2018-02-04 01:37:48,646 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 01:37:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-02-04 01:37:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2018-02-04 01:37:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-02-04 01:37:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-02-04 01:37:48,648 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 138 [2018-02-04 01:37:48,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:48,648 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-02-04 01:37:48,648 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-02-04 01:37:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-02-04 01:37:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-02-04 01:37:48,648 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:48,649 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 01:37:48,649 INFO L371 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:48,649 INFO L82 PathProgramCache]: Analyzing trace with hash -219252535, now seen corresponding path program 22 times [2018-02-04 01:37:48,649 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:48,649 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:48,649 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:48,649 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:48,649 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:48,657 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:48,923 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 01:37:48,923 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:48,923 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 01:37:48,929 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:37:48,951 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:37:48,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:48,953 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:48,967 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 01:37:48,986 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:48,986 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-02-04 01:37:48,987 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-02-04 01:37:48,987 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-02-04 01:37:48,987 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-02-04 01:37:48,987 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 26 states. [2018-02-04 01:37:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:49,173 INFO L93 Difference]: Finished difference Result 233 states and 248 transitions. [2018-02-04 01:37:49,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-02-04 01:37:49,173 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 147 [2018-02-04 01:37:49,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:49,174 INFO L225 Difference]: With dead ends: 233 [2018-02-04 01:37:49,175 INFO L226 Difference]: Without dead ends: 233 [2018-02-04 01:37:49,175 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-02-04 01:37:49,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-02-04 01:37:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 152. [2018-02-04 01:37:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-02-04 01:37:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2018-02-04 01:37:49,178 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2018-02-04 01:37:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:49,178 INFO L432 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2018-02-04 01:37:49,178 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-02-04 01:37:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2018-02-04 01:37:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-02-04 01:37:49,179 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:49,179 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 01:37:49,179 INFO L371 AbstractCegarLoop]: === Iteration 25 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:49,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2062915152, now seen corresponding path program 23 times [2018-02-04 01:37:49,180 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:49,180 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:49,180 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:49,180 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:49,180 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:49,190 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:49,437 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 01:37:49,438 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:49,438 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 01:37:49,444 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:37:49,532 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-02-04 01:37:49,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:49,535 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:49,553 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 01:37:49,576 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:49,576 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-02-04 01:37:49,576 INFO L409 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-02-04 01:37:49,576 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-02-04 01:37:49,577 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-02-04 01:37:49,577 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand 27 states. [2018-02-04 01:37:49,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:49,721 INFO L93 Difference]: Finished difference Result 242 states and 258 transitions. [2018-02-04 01:37:49,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-02-04 01:37:49,722 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 151 [2018-02-04 01:37:49,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:49,722 INFO L225 Difference]: With dead ends: 242 [2018-02-04 01:37:49,723 INFO L226 Difference]: Without dead ends: 242 [2018-02-04 01:37:49,723 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 01:37:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-02-04 01:37:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 156. [2018-02-04 01:37:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-02-04 01:37:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-02-04 01:37:49,725 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 151 [2018-02-04 01:37:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:49,725 INFO L432 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-02-04 01:37:49,725 INFO L433 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-02-04 01:37:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-02-04 01:37:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-02-04 01:37:49,725 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:49,726 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 01:37:49,726 INFO L371 AbstractCegarLoop]: === Iteration 26 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:49,726 INFO L82 PathProgramCache]: Analyzing trace with hash -731541737, now seen corresponding path program 24 times [2018-02-04 01:37:49,726 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:49,726 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:49,726 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:49,726 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:49,726 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:49,732 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:50,026 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 01:37:50,026 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:50,026 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 01:37:50,031 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:37:50,067 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-02-04 01:37:50,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:50,068 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:50,090 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 01:37:50,108 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:50,108 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 12] total 30 [2018-02-04 01:37:50,108 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-02-04 01:37:50,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-02-04 01:37:50,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=453, Unknown=0, NotChecked=0, Total=870 [2018-02-04 01:37:50,109 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 30 states. [2018-02-04 01:37:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:50,438 INFO L93 Difference]: Finished difference Result 251 states and 267 transitions. [2018-02-04 01:37:50,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-02-04 01:37:50,439 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 155 [2018-02-04 01:37:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:50,440 INFO L225 Difference]: With dead ends: 251 [2018-02-04 01:37:50,440 INFO L226 Difference]: Without dead ends: 251 [2018-02-04 01:37:50,441 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 01:37:50,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-02-04 01:37:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2018-02-04 01:37:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-02-04 01:37:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-02-04 01:37:50,444 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 155 [2018-02-04 01:37:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:50,444 INFO L432 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-02-04 01:37:50,444 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-02-04 01:37:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-02-04 01:37:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-02-04 01:37:50,445 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:50,445 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 01:37:50,445 INFO L371 AbstractCegarLoop]: === Iteration 27 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash 7304644, now seen corresponding path program 25 times [2018-02-04 01:37:50,445 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:50,446 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:50,446 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:50,446 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:50,446 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:50,456 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:50,799 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 01:37:50,799 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:50,800 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 01:37:50,807 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:50,841 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:50,869 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 01:37:50,902 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:50,902 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-02-04 01:37:50,903 INFO L409 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-02-04 01:37:50,903 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-02-04 01:37:50,903 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-02-04 01:37:50,903 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 29 states. [2018-02-04 01:37:51,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:51,102 INFO L93 Difference]: Finished difference Result 260 states and 277 transitions. [2018-02-04 01:37:51,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-02-04 01:37:51,102 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 164 [2018-02-04 01:37:51,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:51,103 INFO L225 Difference]: With dead ends: 260 [2018-02-04 01:37:51,104 INFO L226 Difference]: Without dead ends: 260 [2018-02-04 01:37:51,104 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-02-04 01:37:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2018-02-04 01:37:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2018-02-04 01:37:51,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-02-04 01:37:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-02-04 01:37:51,108 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-02-04 01:37:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:51,108 INFO L432 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-02-04 01:37:51,108 INFO L433 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-02-04 01:37:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-02-04 01:37:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-02-04 01:37:51,109 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:51,109 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 01:37:51,109 INFO L371 AbstractCegarLoop]: === Iteration 28 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1420521539, now seen corresponding path program 26 times [2018-02-04 01:37:51,109 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:51,109 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:51,110 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:51,110 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:51,110 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:51,121 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:51,568 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 01:37:51,568 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:51,569 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 01:37:51,579 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:37:51,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:37:51,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:51,616 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:51,642 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 01:37:51,667 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:51,667 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-02-04 01:37:51,667 INFO L409 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-02-04 01:37:51,667 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-02-04 01:37:51,668 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-02-04 01:37:51,668 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 30 states. [2018-02-04 01:37:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:51,832 INFO L93 Difference]: Finished difference Result 269 states and 287 transitions. [2018-02-04 01:37:51,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-02-04 01:37:51,832 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 168 [2018-02-04 01:37:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:51,833 INFO L225 Difference]: With dead ends: 269 [2018-02-04 01:37:51,833 INFO L226 Difference]: Without dead ends: 269 [2018-02-04 01:37:51,833 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-02-04 01:37:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-02-04 01:37:51,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 173. [2018-02-04 01:37:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-02-04 01:37:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-02-04 01:37:51,835 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 168 [2018-02-04 01:37:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:51,835 INFO L432 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-02-04 01:37:51,835 INFO L433 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-02-04 01:37:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-02-04 01:37:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-02-04 01:37:51,835 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:51,836 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 01:37:51,836 INFO L371 AbstractCegarLoop]: === Iteration 29 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash -910555850, now seen corresponding path program 27 times [2018-02-04 01:37:51,836 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:51,836 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:51,836 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:51,836 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:51,836 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:51,842 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:52,159 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 01:37:52,159 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:52,159 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 01:37:52,164 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:37:52,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-02-04 01:37:52,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:52,208 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:52,255 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 01:37:52,289 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:52,289 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13] total 33 [2018-02-04 01:37:52,289 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-02-04 01:37:52,290 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-02-04 01:37:52,290 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=548, Unknown=0, NotChecked=0, Total=1056 [2018-02-04 01:37:52,290 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 33 states. [2018-02-04 01:37:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:52,558 INFO L93 Difference]: Finished difference Result 278 states and 296 transitions. [2018-02-04 01:37:52,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-02-04 01:37:52,558 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 172 [2018-02-04 01:37:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:52,559 INFO L225 Difference]: With dead ends: 278 [2018-02-04 01:37:52,559 INFO L226 Difference]: Without dead ends: 278 [2018-02-04 01:37:52,560 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 01:37:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-02-04 01:37:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 182. [2018-02-04 01:37:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-02-04 01:37:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2018-02-04 01:37:52,562 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 172 [2018-02-04 01:37:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:52,562 INFO L432 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2018-02-04 01:37:52,562 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-02-04 01:37:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2018-02-04 01:37:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-02-04 01:37:52,568 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:52,568 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 01:37:52,569 INFO L371 AbstractCegarLoop]: === Iteration 30 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:52,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1830068019, now seen corresponding path program 28 times [2018-02-04 01:37:52,569 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:52,569 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:52,570 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:52,570 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:52,570 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:52,581 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:53,008 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 01:37:53,008 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:53,008 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 01:37:53,013 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:37:53,039 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:37:53,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:53,041 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:53,061 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 01:37:53,078 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:53,078 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-02-04 01:37:53,079 INFO L409 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-02-04 01:37:53,079 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-02-04 01:37:53,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-02-04 01:37:53,079 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 32 states. [2018-02-04 01:37:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:53,269 INFO L93 Difference]: Finished difference Result 287 states and 306 transitions. [2018-02-04 01:37:53,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-02-04 01:37:53,269 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 181 [2018-02-04 01:37:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:53,270 INFO L225 Difference]: With dead ends: 287 [2018-02-04 01:37:53,270 INFO L226 Difference]: Without dead ends: 287 [2018-02-04 01:37:53,270 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 01:37:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-02-04 01:37:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 186. [2018-02-04 01:37:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-02-04 01:37:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-02-04 01:37:53,272 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 181 [2018-02-04 01:37:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:53,273 INFO L432 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-02-04 01:37:53,273 INFO L433 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-02-04 01:37:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-02-04 01:37:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-02-04 01:37:53,273 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:53,273 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 01:37:53,273 INFO L371 AbstractCegarLoop]: === Iteration 31 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:53,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1177971110, now seen corresponding path program 29 times [2018-02-04 01:37:53,274 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:53,274 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:53,274 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:53,274 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:53,274 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:53,280 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:53,618 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 01:37:53,618 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:53,618 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 01:37:53,624 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:37:53,780 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-02-04 01:37:53,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:53,783 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:53,811 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 01:37:53,828 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:53,829 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-02-04 01:37:53,829 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-02-04 01:37:53,829 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-02-04 01:37:53,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-02-04 01:37:53,829 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 33 states. [2018-02-04 01:37:53,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:53,976 INFO L93 Difference]: Finished difference Result 296 states and 316 transitions. [2018-02-04 01:37:53,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-02-04 01:37:53,977 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 185 [2018-02-04 01:37:53,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:53,977 INFO L225 Difference]: With dead ends: 296 [2018-02-04 01:37:53,977 INFO L226 Difference]: Without dead ends: 296 [2018-02-04 01:37:53,978 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 01:37:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2018-02-04 01:37:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 190. [2018-02-04 01:37:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-02-04 01:37:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-02-04 01:37:53,981 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2018-02-04 01:37:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:53,981 INFO L432 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-02-04 01:37:53,981 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-02-04 01:37:53,981 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-02-04 01:37:53,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-02-04 01:37:53,982 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:53,982 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 01:37:53,982 INFO L371 AbstractCegarLoop]: === Iteration 32 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:53,983 INFO L82 PathProgramCache]: Analyzing trace with hash 659595777, now seen corresponding path program 30 times [2018-02-04 01:37:53,983 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:53,983 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:53,984 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:53,984 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:53,984 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:54,003 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:54,417 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 01:37:54,417 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:54,417 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 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 01:37:54,423 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:37:54,484 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-02-04 01:37:54,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:54,487 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:54,579 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 01:37:54,597 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:54,597 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 14] total 36 [2018-02-04 01:37:54,597 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-02-04 01:37:54,597 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-02-04 01:37:54,597 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=608, Invalid=652, Unknown=0, NotChecked=0, Total=1260 [2018-02-04 01:37:54,597 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 36 states. [2018-02-04 01:37:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:54,825 INFO L93 Difference]: Finished difference Result 305 states and 325 transitions. [2018-02-04 01:37:54,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-02-04 01:37:54,825 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 189 [2018-02-04 01:37:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:54,826 INFO L225 Difference]: With dead ends: 305 [2018-02-04 01:37:54,826 INFO L226 Difference]: Without dead ends: 305 [2018-02-04 01:37:54,827 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 01:37:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2018-02-04 01:37:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 199. [2018-02-04 01:37:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-02-04 01:37:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-02-04 01:37:54,829 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 189 [2018-02-04 01:37:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:54,829 INFO L432 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-02-04 01:37:54,829 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-02-04 01:37:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-02-04 01:37:54,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-02-04 01:37:54,830 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:54,830 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 01:37:54,830 INFO L371 AbstractCegarLoop]: === Iteration 33 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:54,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1088370982, now seen corresponding path program 31 times [2018-02-04 01:37:54,830 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:54,830 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:54,831 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:54,831 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:54,831 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:54,841 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:55,297 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 01:37:55,297 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:55,297 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 01:37:55,302 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:55,329 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:55,368 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 01:37:55,386 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:55,386 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-02-04 01:37:55,386 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-02-04 01:37:55,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-02-04 01:37:55,387 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-02-04 01:37:55,387 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 35 states. [2018-02-04 01:37:55,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:55,621 INFO L93 Difference]: Finished difference Result 314 states and 335 transitions. [2018-02-04 01:37:55,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-02-04 01:37:55,622 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 198 [2018-02-04 01:37:55,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:55,622 INFO L225 Difference]: With dead ends: 314 [2018-02-04 01:37:55,623 INFO L226 Difference]: Without dead ends: 314 [2018-02-04 01:37:55,623 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-02-04 01:37:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-02-04 01:37:55,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 203. [2018-02-04 01:37:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-02-04 01:37:55,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-02-04 01:37:55,625 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 198 [2018-02-04 01:37:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:55,625 INFO L432 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-02-04 01:37:55,625 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-02-04 01:37:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-02-04 01:37:55,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-02-04 01:37:55,626 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:55,626 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 01:37:55,626 INFO L371 AbstractCegarLoop]: === Iteration 34 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1538121069, now seen corresponding path program 32 times [2018-02-04 01:37:55,626 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:55,626 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:55,627 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:55,627 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:37:55,627 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:55,633 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:56,041 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 01:37:56,041 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:56,041 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 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 01:37:56,047 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:37:56,074 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:37:56,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:56,076 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:56,095 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 01:37:56,111 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:56,112 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-02-04 01:37:56,112 INFO L409 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-02-04 01:37:56,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-02-04 01:37:56,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-02-04 01:37:56,112 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 36 states. [2018-02-04 01:37:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:56,442 INFO L93 Difference]: Finished difference Result 323 states and 345 transitions. [2018-02-04 01:37:56,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-02-04 01:37:56,443 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 202 [2018-02-04 01:37:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:56,444 INFO L225 Difference]: With dead ends: 323 [2018-02-04 01:37:56,444 INFO L226 Difference]: Without dead ends: 323 [2018-02-04 01:37:56,444 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 01:37:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-02-04 01:37:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 207. [2018-02-04 01:37:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-02-04 01:37:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-02-04 01:37:56,448 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 202 [2018-02-04 01:37:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:56,448 INFO L432 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-02-04 01:37:56,448 INFO L433 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-02-04 01:37:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-02-04 01:37:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-02-04 01:37:56,449 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:56,449 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 01:37:56,449 INFO L371 AbstractCegarLoop]: === Iteration 35 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1785923124, now seen corresponding path program 33 times [2018-02-04 01:37:56,450 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:56,450 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:56,450 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:56,450 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:56,451 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:56,461 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:56,863 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 01:37:56,864 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:56,864 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 01:37:56,868 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:37:56,892 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-02-04 01:37:56,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:56,894 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:56,919 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 01:37:56,936 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:56,936 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 15] total 39 [2018-02-04 01:37:56,937 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-02-04 01:37:56,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-02-04 01:37:56,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=765, Unknown=0, NotChecked=0, Total=1482 [2018-02-04 01:37:56,937 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 39 states. [2018-02-04 01:37:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:57,263 INFO L93 Difference]: Finished difference Result 332 states and 354 transitions. [2018-02-04 01:37:57,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-02-04 01:37:57,263 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 206 [2018-02-04 01:37:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:57,264 INFO L225 Difference]: With dead ends: 332 [2018-02-04 01:37:57,264 INFO L226 Difference]: Without dead ends: 332 [2018-02-04 01:37:57,264 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1173, Invalid=1377, Unknown=0, NotChecked=0, Total=2550 [2018-02-04 01:37:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2018-02-04 01:37:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 216. [2018-02-04 01:37:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-02-04 01:37:57,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-02-04 01:37:57,266 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 206 [2018-02-04 01:37:57,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:57,266 INFO L432 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-02-04 01:37:57,266 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-02-04 01:37:57,266 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-02-04 01:37:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-02-04 01:37:57,267 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:57,267 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 01:37:57,267 INFO L371 AbstractCegarLoop]: === Iteration 36 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:57,267 INFO L82 PathProgramCache]: Analyzing trace with hash 716025501, now seen corresponding path program 34 times [2018-02-04 01:37:57,267 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:57,267 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:57,268 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:57,268 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:57,268 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:57,274 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:57,747 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 01:37:57,748 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:57,748 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 01:37:57,753 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:37:57,783 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:37:57,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:57,785 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:57,819 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 01:37:57,837 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:57,838 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-02-04 01:37:57,838 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-02-04 01:37:57,838 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-02-04 01:37:57,838 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-02-04 01:37:57,838 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 38 states. [2018-02-04 01:37:58,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:58,028 INFO L93 Difference]: Finished difference Result 341 states and 364 transitions. [2018-02-04 01:37:58,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-02-04 01:37:58,028 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 215 [2018-02-04 01:37:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:58,029 INFO L225 Difference]: With dead ends: 341 [2018-02-04 01:37:58,029 INFO L226 Difference]: Without dead ends: 341 [2018-02-04 01:37:58,030 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 01:37:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-02-04 01:37:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 220. [2018-02-04 01:37:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-02-04 01:37:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-02-04 01:37:58,043 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2018-02-04 01:37:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:58,043 INFO L432 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-02-04 01:37:58,043 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-02-04 01:37:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-02-04 01:37:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-02-04 01:37:58,044 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:58,044 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 01:37:58,044 INFO L371 AbstractCegarLoop]: === Iteration 37 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:58,044 INFO L82 PathProgramCache]: Analyzing trace with hash 376052740, now seen corresponding path program 35 times [2018-02-04 01:37:58,045 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:58,045 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:58,045 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:58,045 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:58,045 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:58,055 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:58,468 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 01:37:58,468 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:58,468 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 01:37:58,473 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:37:58,757 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-02-04 01:37:58,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:58,760 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:58,796 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 01:37:58,815 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:58,815 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-02-04 01:37:58,815 INFO L409 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-02-04 01:37:58,815 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-02-04 01:37:58,816 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-02-04 01:37:58,816 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 39 states. [2018-02-04 01:37:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:37:59,030 INFO L93 Difference]: Finished difference Result 350 states and 374 transitions. [2018-02-04 01:37:59,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-02-04 01:37:59,030 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 219 [2018-02-04 01:37:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:37:59,031 INFO L225 Difference]: With dead ends: 350 [2018-02-04 01:37:59,031 INFO L226 Difference]: Without dead ends: 350 [2018-02-04 01:37:59,032 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-02-04 01:37:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2018-02-04 01:37:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 224. [2018-02-04 01:37:59,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-02-04 01:37:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2018-02-04 01:37:59,034 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 219 [2018-02-04 01:37:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:37:59,034 INFO L432 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2018-02-04 01:37:59,034 INFO L433 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-02-04 01:37:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2018-02-04 01:37:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-02-04 01:37:59,035 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:37:59,035 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 01:37:59,035 INFO L371 AbstractCegarLoop]: === Iteration 38 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:37:59,035 INFO L82 PathProgramCache]: Analyzing trace with hash -908886549, now seen corresponding path program 36 times [2018-02-04 01:37:59,035 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:37:59,035 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:37:59,035 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:59,036 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:37:59,036 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:37:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:37:59,041 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:37:59,492 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 01:37:59,493 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:37:59,493 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 01:37:59,498 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:37:59,569 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-02-04 01:37:59,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:37:59,572 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:37:59,625 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 01:37:59,659 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:37:59,659 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 16] total 42 [2018-02-04 01:37:59,659 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-02-04 01:37:59,660 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-02-04 01:37:59,660 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=887, Unknown=0, NotChecked=0, Total=1722 [2018-02-04 01:37:59,660 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 42 states. [2018-02-04 01:38:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:00,033 INFO L93 Difference]: Finished difference Result 359 states and 383 transitions. [2018-02-04 01:38:00,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-02-04 01:38:00,033 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 223 [2018-02-04 01:38:00,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:00,034 INFO L225 Difference]: With dead ends: 359 [2018-02-04 01:38:00,034 INFO L226 Difference]: Without dead ends: 359 [2018-02-04 01:38:00,034 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 01:38:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2018-02-04 01:38:00,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 233. [2018-02-04 01:38:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-02-04 01:38:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2018-02-04 01:38:00,036 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 223 [2018-02-04 01:38:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:00,037 INFO L432 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2018-02-04 01:38:00,037 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-02-04 01:38:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2018-02-04 01:38:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-02-04 01:38:00,037 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:00,037 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 01:38:00,037 INFO L371 AbstractCegarLoop]: === Iteration 39 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:00,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1724416272, now seen corresponding path program 37 times [2018-02-04 01:38:00,038 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:00,038 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:00,038 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:00,038 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:00,038 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:00,044 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:00,568 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 01:38:00,568 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:00,568 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 01:38:00,573 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:00,608 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:00,633 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 01:38:00,665 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:00,665 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-02-04 01:38:00,665 INFO L409 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-02-04 01:38:00,666 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-02-04 01:38:00,666 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-02-04 01:38:00,666 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand 41 states. [2018-02-04 01:38:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:00,899 INFO L93 Difference]: Finished difference Result 368 states and 393 transitions. [2018-02-04 01:38:00,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-02-04 01:38:00,899 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 232 [2018-02-04 01:38:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:00,900 INFO L225 Difference]: With dead ends: 368 [2018-02-04 01:38:00,900 INFO L226 Difference]: Without dead ends: 368 [2018-02-04 01:38:00,900 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 01:38:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2018-02-04 01:38:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 237. [2018-02-04 01:38:00,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-02-04 01:38:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2018-02-04 01:38:00,902 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 232 [2018-02-04 01:38:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:00,903 INFO L432 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2018-02-04 01:38:00,903 INFO L433 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-02-04 01:38:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2018-02-04 01:38:00,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-02-04 01:38:00,903 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:00,903 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 01:38:00,903 INFO L371 AbstractCegarLoop]: === Iteration 40 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:00,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1358212201, now seen corresponding path program 38 times [2018-02-04 01:38:00,904 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:00,904 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:00,904 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:00,904 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:00,904 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:00,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:00,921 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:01,362 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 01:38:01,362 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:01,363 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 01:38:01,371 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:38:01,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:38:01,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:01,411 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:01,455 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 01:38:01,473 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:01,473 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-02-04 01:38:01,474 INFO L409 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-02-04 01:38:01,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-02-04 01:38:01,475 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-02-04 01:38:01,475 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 42 states. [2018-02-04 01:38:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:01,855 INFO L93 Difference]: Finished difference Result 377 states and 403 transitions. [2018-02-04 01:38:01,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-02-04 01:38:01,855 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 236 [2018-02-04 01:38:01,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:01,856 INFO L225 Difference]: With dead ends: 377 [2018-02-04 01:38:01,856 INFO L226 Difference]: Without dead ends: 377 [2018-02-04 01:38:01,856 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 01:38:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2018-02-04 01:38:01,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 241. [2018-02-04 01:38:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-02-04 01:38:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2018-02-04 01:38:01,859 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 236 [2018-02-04 01:38:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:01,859 INFO L432 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2018-02-04 01:38:01,859 INFO L433 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-02-04 01:38:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2018-02-04 01:38:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-02-04 01:38:01,860 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:01,860 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 01:38:01,860 INFO L371 AbstractCegarLoop]: === Iteration 41 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:01,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1660712290, now seen corresponding path program 39 times [2018-02-04 01:38:01,860 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:01,860 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:01,861 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:01,861 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:01,861 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:01,877 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:02,471 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 01:38:02,471 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:02,471 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 01:38:02,476 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:38:02,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-02-04 01:38:02,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:02,531 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:02,595 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 01:38:02,614 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:02,615 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 17] total 45 [2018-02-04 01:38:02,615 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-02-04 01:38:02,615 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-02-04 01:38:02,616 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=1018, Unknown=0, NotChecked=0, Total=1980 [2018-02-04 01:38:02,616 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 45 states. [2018-02-04 01:38:03,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:03,131 INFO L93 Difference]: Finished difference Result 386 states and 412 transitions. [2018-02-04 01:38:03,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-02-04 01:38:03,131 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 240 [2018-02-04 01:38:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:03,132 INFO L225 Difference]: With dead ends: 386 [2018-02-04 01:38:03,132 INFO L226 Difference]: Without dead ends: 386 [2018-02-04 01:38:03,132 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1578, Invalid=1844, Unknown=0, NotChecked=0, Total=3422 [2018-02-04 01:38:03,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2018-02-04 01:38:03,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 250. [2018-02-04 01:38:03,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-02-04 01:38:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-02-04 01:38:03,134 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 240 [2018-02-04 01:38:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:03,135 INFO L432 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-02-04 01:38:03,135 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-02-04 01:38:03,135 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-02-04 01:38:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-02-04 01:38:03,135 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:03,135 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 01:38:03,135 INFO L371 AbstractCegarLoop]: === Iteration 42 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:03,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1376712953, now seen corresponding path program 40 times [2018-02-04 01:38:03,136 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:03,136 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:03,136 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:03,136 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:03,136 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:03,142 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:03,673 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 01:38:03,673 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:03,673 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 01:38:03,683 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:38:03,715 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:38:03,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:03,718 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:03,778 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 01:38:03,810 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:03,810 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-02-04 01:38:03,810 INFO L409 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-02-04 01:38:03,810 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-02-04 01:38:03,810 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-02-04 01:38:03,810 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 44 states. [2018-02-04 01:38:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:04,042 INFO L93 Difference]: Finished difference Result 395 states and 422 transitions. [2018-02-04 01:38:04,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-02-04 01:38:04,042 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 249 [2018-02-04 01:38:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:04,043 INFO L225 Difference]: With dead ends: 395 [2018-02-04 01:38:04,043 INFO L226 Difference]: Without dead ends: 395 [2018-02-04 01:38:04,043 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 01:38:04,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2018-02-04 01:38:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 254. [2018-02-04 01:38:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-02-04 01:38:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2018-02-04 01:38:04,045 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 249 [2018-02-04 01:38:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:04,045 INFO L432 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2018-02-04 01:38:04,046 INFO L433 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-02-04 01:38:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2018-02-04 01:38:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-02-04 01:38:04,047 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:04,047 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 01:38:04,047 INFO L371 AbstractCegarLoop]: === Iteration 43 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1434933934, now seen corresponding path program 41 times [2018-02-04 01:38:04,047 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:04,047 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:04,048 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:04,048 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:04,048 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:04,058 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:04,609 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 01:38:04,609 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:04,609 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 01:38:04,620 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:38:05,144 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-02-04 01:38:05,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:05,148 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:05,198 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 01:38:05,232 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:05,232 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-02-04 01:38:05,233 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-02-04 01:38:05,233 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-02-04 01:38:05,233 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-02-04 01:38:05,234 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand 45 states. [2018-02-04 01:38:05,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:05,605 INFO L93 Difference]: Finished difference Result 404 states and 432 transitions. [2018-02-04 01:38:05,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-02-04 01:38:05,606 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 253 [2018-02-04 01:38:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:05,607 INFO L225 Difference]: With dead ends: 404 [2018-02-04 01:38:05,607 INFO L226 Difference]: Without dead ends: 404 [2018-02-04 01:38:05,607 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 01:38:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2018-02-04 01:38:05,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 258. [2018-02-04 01:38:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-02-04 01:38:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-02-04 01:38:05,610 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 253 [2018-02-04 01:38:05,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:05,611 INFO L432 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-02-04 01:38:05,611 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-02-04 01:38:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-02-04 01:38:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-02-04 01:38:05,612 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:05,612 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 01:38:05,612 INFO L371 AbstractCegarLoop]: === Iteration 44 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash -588414251, now seen corresponding path program 42 times [2018-02-04 01:38:05,612 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:05,613 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:05,613 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:05,613 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:05,613 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:05,625 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:06,262 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 01:38:06,262 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:06,262 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 01:38:06,267 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:38:06,358 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-02-04 01:38:06,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:06,361 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:06,399 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 01:38:06,417 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:06,418 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 18] total 48 [2018-02-04 01:38:06,418 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-02-04 01:38:06,418 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-02-04 01:38:06,418 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1098, Invalid=1158, Unknown=0, NotChecked=0, Total=2256 [2018-02-04 01:38:06,418 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 48 states. [2018-02-04 01:38:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:06,799 INFO L93 Difference]: Finished difference Result 413 states and 441 transitions. [2018-02-04 01:38:06,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-02-04 01:38:06,799 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 257 [2018-02-04 01:38:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:06,800 INFO L225 Difference]: With dead ends: 413 [2018-02-04 01:38:06,800 INFO L226 Difference]: Without dead ends: 413 [2018-02-04 01:38:06,801 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1803, Invalid=2103, Unknown=0, NotChecked=0, Total=3906 [2018-02-04 01:38:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2018-02-04 01:38:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 267. [2018-02-04 01:38:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-02-04 01:38:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-02-04 01:38:06,803 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 257 [2018-02-04 01:38:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:06,803 INFO L432 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-02-04 01:38:06,803 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-02-04 01:38:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-02-04 01:38:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-02-04 01:38:06,803 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:06,804 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 01:38:06,804 INFO L371 AbstractCegarLoop]: === Iteration 45 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:06,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1871954426, now seen corresponding path program 43 times [2018-02-04 01:38:06,804 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:06,804 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:06,804 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:06,804 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:06,804 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:06,811 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:07,404 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 01:38:07,404 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:07,404 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 01:38:07,408 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:07,445 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:07,474 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 01:38:07,492 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:07,492 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-02-04 01:38:07,492 INFO L409 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-02-04 01:38:07,492 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-02-04 01:38:07,493 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-02-04 01:38:07,493 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 47 states. [2018-02-04 01:38:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:07,788 INFO L93 Difference]: Finished difference Result 422 states and 451 transitions. [2018-02-04 01:38:07,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-02-04 01:38:07,788 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 266 [2018-02-04 01:38:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:07,789 INFO L225 Difference]: With dead ends: 422 [2018-02-04 01:38:07,789 INFO L226 Difference]: Without dead ends: 422 [2018-02-04 01:38:07,790 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 01:38:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2018-02-04 01:38:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 271. [2018-02-04 01:38:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-02-04 01:38:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2018-02-04 01:38:07,793 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2018-02-04 01:38:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:07,793 INFO L432 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2018-02-04 01:38:07,793 INFO L433 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-02-04 01:38:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2018-02-04 01:38:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-02-04 01:38:07,795 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:07,795 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 01:38:07,795 INFO L371 AbstractCegarLoop]: === Iteration 46 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:07,795 INFO L82 PathProgramCache]: Analyzing trace with hash -820982465, now seen corresponding path program 44 times [2018-02-04 01:38:07,795 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:07,795 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:07,796 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:07,796 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:07,796 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:07,809 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:08,457 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 01:38:08,457 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:08,457 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 01:38:08,463 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:38:08,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:38:08,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:08,494 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:08,535 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 01:38:08,553 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:08,553 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-02-04 01:38:08,553 INFO L409 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-02-04 01:38:08,553 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-02-04 01:38:08,553 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-02-04 01:38:08,553 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 48 states. [2018-02-04 01:38:08,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:08,908 INFO L93 Difference]: Finished difference Result 431 states and 461 transitions. [2018-02-04 01:38:08,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-02-04 01:38:08,908 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 270 [2018-02-04 01:38:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:08,909 INFO L225 Difference]: With dead ends: 431 [2018-02-04 01:38:08,909 INFO L226 Difference]: Without dead ends: 431 [2018-02-04 01:38:08,910 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 01:38:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-02-04 01:38:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 275. [2018-02-04 01:38:08,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-02-04 01:38:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-02-04 01:38:08,912 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 270 [2018-02-04 01:38:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:08,913 INFO L432 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-02-04 01:38:08,913 INFO L433 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-02-04 01:38:08,913 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-02-04 01:38:08,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-02-04 01:38:08,914 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:08,914 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 01:38:08,914 INFO L371 AbstractCegarLoop]: === Iteration 47 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:08,914 INFO L82 PathProgramCache]: Analyzing trace with hash -34007048, now seen corresponding path program 45 times [2018-02-04 01:38:08,915 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:08,915 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:08,915 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:08,915 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:08,915 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:08,928 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:09,691 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 01:38:09,691 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:09,691 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 01:38:09,697 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:38:09,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-02-04 01:38:09,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:09,746 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:09,788 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 01:38:09,805 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:09,805 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 19] total 51 [2018-02-04 01:38:09,805 INFO L409 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-02-04 01:38:09,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-02-04 01:38:09,806 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1243, Invalid=1307, Unknown=0, NotChecked=0, Total=2550 [2018-02-04 01:38:09,806 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 51 states. [2018-02-04 01:38:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:10,262 INFO L93 Difference]: Finished difference Result 440 states and 470 transitions. [2018-02-04 01:38:10,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-02-04 01:38:10,262 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 274 [2018-02-04 01:38:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:10,263 INFO L225 Difference]: With dead ends: 440 [2018-02-04 01:38:10,263 INFO L226 Difference]: Without dead ends: 440 [2018-02-04 01:38:10,263 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 01:38:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2018-02-04 01:38:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 284. [2018-02-04 01:38:10,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-02-04 01:38:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 285 transitions. [2018-02-04 01:38:10,266 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 285 transitions. Word has length 274 [2018-02-04 01:38:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:10,266 INFO L432 AbstractCegarLoop]: Abstraction has 284 states and 285 transitions. [2018-02-04 01:38:10,266 INFO L433 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-02-04 01:38:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 285 transitions. [2018-02-04 01:38:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-02-04 01:38:10,267 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:10,267 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 01:38:10,267 INFO L371 AbstractCegarLoop]: === Iteration 48 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:10,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1716123535, now seen corresponding path program 46 times [2018-02-04 01:38:10,267 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:10,267 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:10,267 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:10,267 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:10,267 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:10,274 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:10,988 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 01:38:10,988 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:10,988 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 01:38:10,993 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:38:11,027 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:38:11,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:11,030 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:11,063 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 01:38:11,080 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:11,080 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-02-04 01:38:11,080 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-02-04 01:38:11,081 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-02-04 01:38:11,081 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-02-04 01:38:11,081 INFO L87 Difference]: Start difference. First operand 284 states and 285 transitions. Second operand 50 states. [2018-02-04 01:38:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:11,453 INFO L93 Difference]: Finished difference Result 449 states and 480 transitions. [2018-02-04 01:38:11,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-02-04 01:38:11,453 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 283 [2018-02-04 01:38:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:11,454 INFO L225 Difference]: With dead ends: 449 [2018-02-04 01:38:11,455 INFO L226 Difference]: Without dead ends: 449 [2018-02-04 01:38:11,455 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-02-04 01:38:11,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2018-02-04 01:38:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 288. [2018-02-04 01:38:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-02-04 01:38:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 289 transitions. [2018-02-04 01:38:11,458 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 289 transitions. Word has length 283 [2018-02-04 01:38:11,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:11,459 INFO L432 AbstractCegarLoop]: Abstraction has 288 states and 289 transitions. [2018-02-04 01:38:11,459 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-02-04 01:38:11,459 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 289 transitions. [2018-02-04 01:38:11,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-02-04 01:38:11,460 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:11,460 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 01:38:11,460 INFO L371 AbstractCegarLoop]: === Iteration 49 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:11,460 INFO L82 PathProgramCache]: Analyzing trace with hash 962376280, now seen corresponding path program 47 times [2018-02-04 01:38:11,461 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:11,461 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:11,461 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:11,461 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:11,461 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:11,474 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:12,158 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 01:38:12,158 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:12,158 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 01:38:12,163 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:38:12,880 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-02-04 01:38:12,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:12,884 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:12,917 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 01:38:12,936 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:12,936 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-02-04 01:38:12,937 INFO L409 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-02-04 01:38:12,937 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-02-04 01:38:12,937 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-02-04 01:38:12,937 INFO L87 Difference]: Start difference. First operand 288 states and 289 transitions. Second operand 51 states. [2018-02-04 01:38:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:13,255 INFO L93 Difference]: Finished difference Result 458 states and 490 transitions. [2018-02-04 01:38:13,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-02-04 01:38:13,255 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 287 [2018-02-04 01:38:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:13,256 INFO L225 Difference]: With dead ends: 458 [2018-02-04 01:38:13,256 INFO L226 Difference]: Without dead ends: 458 [2018-02-04 01:38:13,256 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-02-04 01:38:13,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2018-02-04 01:38:13,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 292. [2018-02-04 01:38:13,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-02-04 01:38:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2018-02-04 01:38:13,260 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 287 [2018-02-04 01:38:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:13,260 INFO L432 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2018-02-04 01:38:13,260 INFO L433 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-02-04 01:38:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2018-02-04 01:38:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-02-04 01:38:13,261 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:13,261 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 01:38:13,261 INFO L371 AbstractCegarLoop]: === Iteration 50 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:13,261 INFO L82 PathProgramCache]: Analyzing trace with hash -264367937, now seen corresponding path program 48 times [2018-02-04 01:38:13,261 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:13,261 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:13,262 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:13,262 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:13,262 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:13,269 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:14,014 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 01:38:14,014 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:14,014 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 01:38:14,019 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:38:14,134 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-02-04 01:38:14,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:14,136 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:14,175 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 01:38:14,194 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:14,194 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 20] total 54 [2018-02-04 01:38:14,194 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-02-04 01:38:14,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-02-04 01:38:14,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1397, Invalid=1465, Unknown=0, NotChecked=0, Total=2862 [2018-02-04 01:38:14,195 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand 54 states. [2018-02-04 01:38:14,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:14,672 INFO L93 Difference]: Finished difference Result 467 states and 499 transitions. [2018-02-04 01:38:14,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-02-04 01:38:14,672 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 291 [2018-02-04 01:38:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:14,673 INFO L225 Difference]: With dead ends: 467 [2018-02-04 01:38:14,673 INFO L226 Difference]: Without dead ends: 467 [2018-02-04 01:38:14,674 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 01:38:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2018-02-04 01:38:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 301. [2018-02-04 01:38:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-02-04 01:38:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2018-02-04 01:38:14,678 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 291 [2018-02-04 01:38:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:14,678 INFO L432 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2018-02-04 01:38:14,678 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-02-04 01:38:14,678 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2018-02-04 01:38:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-02-04 01:38:14,679 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:14,679 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 01:38:14,680 INFO L371 AbstractCegarLoop]: === Iteration 51 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash -724065252, now seen corresponding path program 49 times [2018-02-04 01:38:14,680 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:14,680 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:14,681 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:14,681 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:14,681 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:14,694 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:15,446 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 01:38:15,446 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:15,446 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 01:38:15,452 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:15,497 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:15,533 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 01:38:15,549 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:15,550 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-02-04 01:38:15,550 INFO L409 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-02-04 01:38:15,550 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-02-04 01:38:15,550 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-02-04 01:38:15,550 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand 53 states. [2018-02-04 01:38:15,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:15,898 INFO L93 Difference]: Finished difference Result 476 states and 509 transitions. [2018-02-04 01:38:15,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-02-04 01:38:15,898 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 300 [2018-02-04 01:38:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:15,899 INFO L225 Difference]: With dead ends: 476 [2018-02-04 01:38:15,900 INFO L226 Difference]: Without dead ends: 476 [2018-02-04 01:38:15,900 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 01:38:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2018-02-04 01:38:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 305. [2018-02-04 01:38:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-02-04 01:38:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2018-02-04 01:38:15,902 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 300 [2018-02-04 01:38:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:15,902 INFO L432 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2018-02-04 01:38:15,902 INFO L433 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-02-04 01:38:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2018-02-04 01:38:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-02-04 01:38:15,904 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:15,904 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 01:38:15,904 INFO L371 AbstractCegarLoop]: === Iteration 52 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1675306261, now seen corresponding path program 50 times [2018-02-04 01:38:15,904 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:15,904 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:15,905 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:15,905 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:15,905 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:15,917 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:16,758 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 01:38:16,758 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:16,758 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 01:38:16,763 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:38:16,793 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:38:16,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:16,796 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:16,833 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 01:38:16,851 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:16,851 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-02-04 01:38:16,852 INFO L409 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-02-04 01:38:16,852 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-02-04 01:38:16,852 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-02-04 01:38:16,852 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand 54 states. [2018-02-04 01:38:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:17,241 INFO L93 Difference]: Finished difference Result 485 states and 519 transitions. [2018-02-04 01:38:17,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-02-04 01:38:17,241 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 304 [2018-02-04 01:38:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:17,242 INFO L225 Difference]: With dead ends: 485 [2018-02-04 01:38:17,242 INFO L226 Difference]: Without dead ends: 485 [2018-02-04 01:38:17,242 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 01:38:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2018-02-04 01:38:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 309. [2018-02-04 01:38:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-02-04 01:38:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2018-02-04 01:38:17,244 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 304 [2018-02-04 01:38:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:17,245 INFO L432 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2018-02-04 01:38:17,245 INFO L433 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-02-04 01:38:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2018-02-04 01:38:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-02-04 01:38:17,245 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:17,245 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 01:38:17,245 INFO L371 AbstractCegarLoop]: === Iteration 53 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:17,246 INFO L82 PathProgramCache]: Analyzing trace with hash -757890674, now seen corresponding path program 51 times [2018-02-04 01:38:17,246 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:17,246 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:17,246 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:17,246 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:17,246 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:17,254 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:18,072 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 01:38:18,072 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:18,072 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 01:38:18,077 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:38:18,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-02-04 01:38:18,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:18,124 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:18,167 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 01:38:18,184 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:18,184 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 21] total 57 [2018-02-04 01:38:18,184 INFO L409 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-02-04 01:38:18,185 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-02-04 01:38:18,185 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1560, Invalid=1632, Unknown=0, NotChecked=0, Total=3192 [2018-02-04 01:38:18,185 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand 57 states. [2018-02-04 01:38:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:18,763 INFO L93 Difference]: Finished difference Result 494 states and 528 transitions. [2018-02-04 01:38:18,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-02-04 01:38:18,763 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 308 [2018-02-04 01:38:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:18,764 INFO L225 Difference]: With dead ends: 494 [2018-02-04 01:38:18,764 INFO L226 Difference]: Without dead ends: 494 [2018-02-04 01:38:18,764 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 01:38:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2018-02-04 01:38:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 318. [2018-02-04 01:38:18,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-02-04 01:38:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 319 transitions. [2018-02-04 01:38:18,766 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 319 transitions. Word has length 308 [2018-02-04 01:38:18,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:18,767 INFO L432 AbstractCegarLoop]: Abstraction has 318 states and 319 transitions. [2018-02-04 01:38:18,767 INFO L433 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-02-04 01:38:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 319 transitions. [2018-02-04 01:38:18,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-02-04 01:38:18,767 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:18,768 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 01:38:18,768 INFO L371 AbstractCegarLoop]: === Iteration 54 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash -747367717, now seen corresponding path program 52 times [2018-02-04 01:38:18,768 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:18,768 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:18,768 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:18,768 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:18,768 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:18,776 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:19,646 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 01:38:19,646 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:19,646 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 01:38:19,652 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:38:19,692 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:38:19,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:19,695 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:19,735 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 01:38:19,752 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:19,752 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-02-04 01:38:19,753 INFO L409 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-02-04 01:38:19,753 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-02-04 01:38:19,753 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-02-04 01:38:19,753 INFO L87 Difference]: Start difference. First operand 318 states and 319 transitions. Second operand 56 states. [2018-02-04 01:38:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:20,180 INFO L93 Difference]: Finished difference Result 503 states and 538 transitions. [2018-02-04 01:38:20,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-02-04 01:38:20,181 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 317 [2018-02-04 01:38:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:20,182 INFO L225 Difference]: With dead ends: 503 [2018-02-04 01:38:20,182 INFO L226 Difference]: Without dead ends: 503 [2018-02-04 01:38:20,182 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-02-04 01:38:20,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2018-02-04 01:38:20,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 322. [2018-02-04 01:38:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-02-04 01:38:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2018-02-04 01:38:20,184 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 317 [2018-02-04 01:38:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:20,185 INFO L432 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2018-02-04 01:38:20,185 INFO L433 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-02-04 01:38:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2018-02-04 01:38:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2018-02-04 01:38:20,185 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:20,186 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 01:38:20,186 INFO L371 AbstractCegarLoop]: === Iteration 55 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:20,186 INFO L82 PathProgramCache]: Analyzing trace with hash -305822974, now seen corresponding path program 53 times [2018-02-04 01:38:20,186 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:20,186 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:20,186 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:20,186 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:20,186 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:20,194 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:21,117 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 01:38:21,117 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:21,117 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 01:38:21,122 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:38:22,259 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-02-04 01:38:22,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:22,264 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:22,306 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 01:38:22,325 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:22,325 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-02-04 01:38:22,326 INFO L409 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-02-04 01:38:22,326 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-02-04 01:38:22,326 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-02-04 01:38:22,326 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 57 states. [2018-02-04 01:38:22,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:22,762 INFO L93 Difference]: Finished difference Result 512 states and 548 transitions. [2018-02-04 01:38:22,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-02-04 01:38:22,762 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 321 [2018-02-04 01:38:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:22,763 INFO L225 Difference]: With dead ends: 512 [2018-02-04 01:38:22,763 INFO L226 Difference]: Without dead ends: 512 [2018-02-04 01:38:22,764 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 01:38:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2018-02-04 01:38:22,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 326. [2018-02-04 01:38:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2018-02-04 01:38:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 327 transitions. [2018-02-04 01:38:22,766 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 327 transitions. Word has length 321 [2018-02-04 01:38:22,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:22,766 INFO L432 AbstractCegarLoop]: Abstraction has 326 states and 327 transitions. [2018-02-04 01:38:22,766 INFO L433 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-02-04 01:38:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 327 transitions. [2018-02-04 01:38:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2018-02-04 01:38:22,767 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:22,767 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 01:38:22,767 INFO L371 AbstractCegarLoop]: === Iteration 56 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:22,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1543206999, now seen corresponding path program 54 times [2018-02-04 01:38:22,767 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:22,767 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:22,768 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:22,768 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:22,768 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:22,775 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:23,746 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 01:38:23,746 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:23,746 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 01:38:23,768 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:38:23,924 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-02-04 01:38:23,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:23,926 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:23,975 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 01:38:23,994 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:23,994 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 22] total 60 [2018-02-04 01:38:23,994 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-02-04 01:38:23,994 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-02-04 01:38:23,994 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1732, Invalid=1808, Unknown=0, NotChecked=0, Total=3540 [2018-02-04 01:38:23,995 INFO L87 Difference]: Start difference. First operand 326 states and 327 transitions. Second operand 60 states. [2018-02-04 01:38:24,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:24,546 INFO L93 Difference]: Finished difference Result 521 states and 557 transitions. [2018-02-04 01:38:24,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-02-04 01:38:24,546 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 325 [2018-02-04 01:38:24,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:24,547 INFO L225 Difference]: With dead ends: 521 [2018-02-04 01:38:24,548 INFO L226 Difference]: Without dead ends: 521 [2018-02-04 01:38:24,548 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2853, Invalid=3309, Unknown=0, NotChecked=0, Total=6162 [2018-02-04 01:38:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2018-02-04 01:38:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 335. [2018-02-04 01:38:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335 states. [2018-02-04 01:38:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 336 transitions. [2018-02-04 01:38:24,550 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 336 transitions. Word has length 325 [2018-02-04 01:38:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:24,550 INFO L432 AbstractCegarLoop]: Abstraction has 335 states and 336 transitions. [2018-02-04 01:38:24,550 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-02-04 01:38:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 336 transitions. [2018-02-04 01:38:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2018-02-04 01:38:24,551 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:24,551 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 01:38:24,551 INFO L371 AbstractCegarLoop]: === Iteration 57 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:24,551 INFO L82 PathProgramCache]: Analyzing trace with hash 586305842, now seen corresponding path program 55 times [2018-02-04 01:38:24,551 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:24,551 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:24,552 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:24,552 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:24,552 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:24,560 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:25,644 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 01:38:25,644 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:25,645 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 01:38:25,651 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:25,695 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:25,745 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 01:38:25,763 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:25,763 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-02-04 01:38:25,764 INFO L409 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-02-04 01:38:25,764 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-02-04 01:38:25,764 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-02-04 01:38:25,765 INFO L87 Difference]: Start difference. First operand 335 states and 336 transitions. Second operand 59 states. [2018-02-04 01:38:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:26,248 INFO L93 Difference]: Finished difference Result 530 states and 567 transitions. [2018-02-04 01:38:26,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-02-04 01:38:26,249 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 334 [2018-02-04 01:38:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:26,250 INFO L225 Difference]: With dead ends: 530 [2018-02-04 01:38:26,250 INFO L226 Difference]: Without dead ends: 530 [2018-02-04 01:38:26,250 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 01:38:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2018-02-04 01:38:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 339. [2018-02-04 01:38:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-02-04 01:38:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-02-04 01:38:26,252 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 334 [2018-02-04 01:38:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:26,252 INFO L432 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-02-04 01:38:26,252 INFO L433 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-02-04 01:38:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-02-04 01:38:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-02-04 01:38:26,253 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:26,253 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 01:38:26,253 INFO L371 AbstractCegarLoop]: === Iteration 58 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1712827413, now seen corresponding path program 56 times [2018-02-04 01:38:26,253 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:26,253 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:26,253 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:26,254 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:26,254 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:26,260 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:27,327 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 01:38:27,327 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:27,327 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 01:38:27,332 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:38:27,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:38:27,366 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:27,368 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:27,414 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 01:38:27,432 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:27,432 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-02-04 01:38:27,432 INFO L409 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-02-04 01:38:27,433 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-02-04 01:38:27,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-02-04 01:38:27,433 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 60 states. [2018-02-04 01:38:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:27,996 INFO L93 Difference]: Finished difference Result 539 states and 577 transitions. [2018-02-04 01:38:27,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-02-04 01:38:27,996 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 338 [2018-02-04 01:38:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:27,997 INFO L225 Difference]: With dead ends: 539 [2018-02-04 01:38:27,997 INFO L226 Difference]: Without dead ends: 539 [2018-02-04 01:38:27,998 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-02-04 01:38:27,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2018-02-04 01:38:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 343. [2018-02-04 01:38:28,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-02-04 01:38:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2018-02-04 01:38:28,000 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 338 [2018-02-04 01:38:28,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:28,000 INFO L432 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2018-02-04 01:38:28,000 INFO L433 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-02-04 01:38:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2018-02-04 01:38:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-02-04 01:38:28,001 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:28,001 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 01:38:28,001 INFO L371 AbstractCegarLoop]: === Iteration 59 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:28,001 INFO L82 PathProgramCache]: Analyzing trace with hash -868462044, now seen corresponding path program 57 times [2018-02-04 01:38:28,001 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:28,001 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:28,002 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:28,002 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:28,002 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:28,017 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:29,095 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 01:38:29,096 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:29,096 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 01:38:29,100 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:38:29,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-02-04 01:38:29,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:29,159 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:29,209 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 01:38:29,227 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:29,227 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 23] total 63 [2018-02-04 01:38:29,227 INFO L409 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-02-04 01:38:29,228 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-02-04 01:38:29,228 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1913, Invalid=1993, Unknown=0, NotChecked=0, Total=3906 [2018-02-04 01:38:29,228 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 63 states. [2018-02-04 01:38:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:29,887 INFO L93 Difference]: Finished difference Result 548 states and 586 transitions. [2018-02-04 01:38:29,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-02-04 01:38:29,887 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 342 [2018-02-04 01:38:29,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:29,888 INFO L225 Difference]: With dead ends: 548 [2018-02-04 01:38:29,888 INFO L226 Difference]: Without dead ends: 548 [2018-02-04 01:38:29,888 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 01:38:29,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2018-02-04 01:38:29,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 352. [2018-02-04 01:38:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-02-04 01:38:29,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2018-02-04 01:38:29,891 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 342 [2018-02-04 01:38:29,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:29,891 INFO L432 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2018-02-04 01:38:29,891 INFO L433 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-02-04 01:38:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2018-02-04 01:38:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-02-04 01:38:29,892 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:29,892 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 01:38:29,892 INFO L371 AbstractCegarLoop]: === Iteration 60 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1522366907, now seen corresponding path program 58 times [2018-02-04 01:38:29,892 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:29,892 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:29,893 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:29,893 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:29,893 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:29,901 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:31,022 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 01:38:31,022 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:31,022 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 01:38:31,027 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:38:31,063 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:38:31,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:31,066 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:31,115 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 01:38:31,134 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:31,134 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-02-04 01:38:31,134 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-02-04 01:38:31,135 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-02-04 01:38:31,135 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-02-04 01:38:31,135 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 62 states. [2018-02-04 01:38:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:31,688 INFO L93 Difference]: Finished difference Result 557 states and 596 transitions. [2018-02-04 01:38:31,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-02-04 01:38:31,689 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 351 [2018-02-04 01:38:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:31,690 INFO L225 Difference]: With dead ends: 557 [2018-02-04 01:38:31,690 INFO L226 Difference]: Without dead ends: 557 [2018-02-04 01:38:31,690 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 01:38:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2018-02-04 01:38:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 356. [2018-02-04 01:38:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2018-02-04 01:38:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 357 transitions. [2018-02-04 01:38:31,692 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 357 transitions. Word has length 351 [2018-02-04 01:38:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:31,693 INFO L432 AbstractCegarLoop]: Abstraction has 356 states and 357 transitions. [2018-02-04 01:38:31,693 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-02-04 01:38:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 357 transitions. [2018-02-04 01:38:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2018-02-04 01:38:31,693 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:31,694 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 01:38:31,694 INFO L371 AbstractCegarLoop]: === Iteration 61 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:31,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1782394028, now seen corresponding path program 59 times [2018-02-04 01:38:31,694 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:31,694 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:31,694 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:31,694 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:31,694 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:31,702 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:32,780 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 01:38:32,780 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:32,780 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 01:38:32,785 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:38:34,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-02-04 01:38:34,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:34,474 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:34,536 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 01:38:34,557 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:34,557 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-02-04 01:38:34,558 INFO L409 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-02-04 01:38:34,558 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-02-04 01:38:34,558 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-02-04 01:38:34,558 INFO L87 Difference]: Start difference. First operand 356 states and 357 transitions. Second operand 63 states. [2018-02-04 01:38:35,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:35,225 INFO L93 Difference]: Finished difference Result 566 states and 606 transitions. [2018-02-04 01:38:35,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-02-04 01:38:35,225 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 355 [2018-02-04 01:38:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:35,226 INFO L225 Difference]: With dead ends: 566 [2018-02-04 01:38:35,226 INFO L226 Difference]: Without dead ends: 566 [2018-02-04 01:38:35,226 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 01:38:35,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2018-02-04 01:38:35,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 360. [2018-02-04 01:38:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2018-02-04 01:38:35,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 361 transitions. [2018-02-04 01:38:35,229 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 361 transitions. Word has length 355 [2018-02-04 01:38:35,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:35,229 INFO L432 AbstractCegarLoop]: Abstraction has 360 states and 361 transitions. [2018-02-04 01:38:35,229 INFO L433 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-02-04 01:38:35,229 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 361 transitions. [2018-02-04 01:38:35,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-02-04 01:38:35,230 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:35,230 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 01:38:35,230 INFO L371 AbstractCegarLoop]: === Iteration 62 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1260406675, now seen corresponding path program 60 times [2018-02-04 01:38:35,230 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:35,230 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:35,231 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:35,231 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:35,231 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:35,239 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:36,417 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 01:38:36,418 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:36,418 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 01:38:36,423 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:38:36,623 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-02-04 01:38:36,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:36,627 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:36,679 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 01:38:36,697 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:36,702 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 24] total 66 [2018-02-04 01:38:36,703 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-02-04 01:38:36,703 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-02-04 01:38:36,704 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2103, Invalid=2187, Unknown=0, NotChecked=0, Total=4290 [2018-02-04 01:38:36,704 INFO L87 Difference]: Start difference. First operand 360 states and 361 transitions. Second operand 66 states. [2018-02-04 01:38:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:37,464 INFO L93 Difference]: Finished difference Result 575 states and 615 transitions. [2018-02-04 01:38:37,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-02-04 01:38:37,464 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 359 [2018-02-04 01:38:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:37,466 INFO L225 Difference]: With dead ends: 575 [2018-02-04 01:38:37,466 INFO L226 Difference]: Without dead ends: 575 [2018-02-04 01:38:37,466 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 01:38:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-02-04 01:38:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 369. [2018-02-04 01:38:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2018-02-04 01:38:37,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 370 transitions. [2018-02-04 01:38:37,468 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 370 transitions. Word has length 359 [2018-02-04 01:38:37,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:37,469 INFO L432 AbstractCegarLoop]: Abstraction has 369 states and 370 transitions. [2018-02-04 01:38:37,469 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-02-04 01:38:37,469 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 370 transitions. [2018-02-04 01:38:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2018-02-04 01:38:37,470 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:37,470 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 01:38:37,470 INFO L371 AbstractCegarLoop]: === Iteration 63 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash 563406152, now seen corresponding path program 61 times [2018-02-04 01:38:37,470 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:37,470 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:37,470 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:37,470 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:37,470 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:37,478 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:38,683 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 01:38:38,683 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:38,683 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 01:38:38,690 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:38,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:38,734 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:38,785 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 01:38:38,802 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:38,803 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-02-04 01:38:38,803 INFO L409 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-02-04 01:38:38,803 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-02-04 01:38:38,804 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-02-04 01:38:38,804 INFO L87 Difference]: Start difference. First operand 369 states and 370 transitions. Second operand 65 states. [2018-02-04 01:38:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:39,344 INFO L93 Difference]: Finished difference Result 584 states and 625 transitions. [2018-02-04 01:38:39,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-02-04 01:38:39,344 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 368 [2018-02-04 01:38:39,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:39,345 INFO L225 Difference]: With dead ends: 584 [2018-02-04 01:38:39,345 INFO L226 Difference]: Without dead ends: 584 [2018-02-04 01:38:39,345 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-02-04 01:38:39,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2018-02-04 01:38:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 373. [2018-02-04 01:38:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2018-02-04 01:38:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 374 transitions. [2018-02-04 01:38:39,348 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 374 transitions. Word has length 368 [2018-02-04 01:38:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:39,348 INFO L432 AbstractCegarLoop]: Abstraction has 373 states and 374 transitions. [2018-02-04 01:38:39,348 INFO L433 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-02-04 01:38:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 374 transitions. [2018-02-04 01:38:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2018-02-04 01:38:39,349 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:39,349 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 01:38:39,349 INFO L371 AbstractCegarLoop]: === Iteration 64 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:39,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1596783041, now seen corresponding path program 62 times [2018-02-04 01:38:39,349 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:39,349 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:39,350 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:39,350 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:39,350 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:39,358 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:40,557 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 01:38:40,558 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:40,558 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 01:38:40,562 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:38:40,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:38:40,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:40,602 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:40,751 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 01:38:40,768 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:40,768 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-02-04 01:38:40,769 INFO L409 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-02-04 01:38:40,769 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-02-04 01:38:40,769 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-02-04 01:38:40,769 INFO L87 Difference]: Start difference. First operand 373 states and 374 transitions. Second operand 66 states. [2018-02-04 01:38:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:41,393 INFO L93 Difference]: Finished difference Result 593 states and 635 transitions. [2018-02-04 01:38:41,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-02-04 01:38:41,393 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 372 [2018-02-04 01:38:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:41,394 INFO L225 Difference]: With dead ends: 593 [2018-02-04 01:38:41,394 INFO L226 Difference]: Without dead ends: 593 [2018-02-04 01:38:41,394 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-02-04 01:38:41,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2018-02-04 01:38:41,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 377. [2018-02-04 01:38:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2018-02-04 01:38:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 378 transitions. [2018-02-04 01:38:41,397 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 378 transitions. Word has length 372 [2018-02-04 01:38:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:41,397 INFO L432 AbstractCegarLoop]: Abstraction has 377 states and 378 transitions. [2018-02-04 01:38:41,397 INFO L433 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-02-04 01:38:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 378 transitions. [2018-02-04 01:38:41,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-02-04 01:38:41,398 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:41,398 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 01:38:41,398 INFO L371 AbstractCegarLoop]: === Iteration 65 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash 826550714, now seen corresponding path program 63 times [2018-02-04 01:38:41,398 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:41,398 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:41,399 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:41,399 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:41,399 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:41,407 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:42,613 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 01:38:42,613 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:42,613 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 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 01:38:42,618 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:38:42,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-02-04 01:38:42,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:42,700 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:42,756 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 01:38:42,774 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:42,774 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 25] total 69 [2018-02-04 01:38:42,774 INFO L409 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-02-04 01:38:42,774 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-02-04 01:38:42,775 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2302, Invalid=2390, Unknown=0, NotChecked=0, Total=4692 [2018-02-04 01:38:42,775 INFO L87 Difference]: Start difference. First operand 377 states and 378 transitions. Second operand 69 states. [2018-02-04 01:38:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:43,568 INFO L93 Difference]: Finished difference Result 602 states and 644 transitions. [2018-02-04 01:38:43,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-02-04 01:38:43,568 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 376 [2018-02-04 01:38:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:43,570 INFO L225 Difference]: With dead ends: 602 [2018-02-04 01:38:43,570 INFO L226 Difference]: Without dead ends: 602 [2018-02-04 01:38:43,570 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 01:38:43,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2018-02-04 01:38:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 386. [2018-02-04 01:38:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2018-02-04 01:38:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 387 transitions. [2018-02-04 01:38:43,572 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 387 transitions. Word has length 376 [2018-02-04 01:38:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:43,572 INFO L432 AbstractCegarLoop]: Abstraction has 386 states and 387 transitions. [2018-02-04 01:38:43,572 INFO L433 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-02-04 01:38:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 387 transitions. [2018-02-04 01:38:43,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2018-02-04 01:38:43,573 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:43,573 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 01:38:43,574 INFO L371 AbstractCegarLoop]: === Iteration 66 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:43,574 INFO L82 PathProgramCache]: Analyzing trace with hash -539442513, now seen corresponding path program 64 times [2018-02-04 01:38:43,574 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:43,574 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:43,574 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:43,574 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:43,574 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:43,582 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:44,934 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 01:38:44,934 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:44,934 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 01:38:44,939 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:38:44,978 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:38:44,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:44,981 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:45,039 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 01:38:45,057 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:45,057 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-02-04 01:38:45,057 INFO L409 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-02-04 01:38:45,058 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-02-04 01:38:45,058 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-02-04 01:38:45,058 INFO L87 Difference]: Start difference. First operand 386 states and 387 transitions. Second operand 68 states. [2018-02-04 01:38:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:45,682 INFO L93 Difference]: Finished difference Result 611 states and 654 transitions. [2018-02-04 01:38:45,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-02-04 01:38:45,683 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 385 [2018-02-04 01:38:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:45,684 INFO L225 Difference]: With dead ends: 611 [2018-02-04 01:38:45,684 INFO L226 Difference]: Without dead ends: 611 [2018-02-04 01:38:45,684 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 01:38:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2018-02-04 01:38:45,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 390. [2018-02-04 01:38:45,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2018-02-04 01:38:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 391 transitions. [2018-02-04 01:38:45,687 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 391 transitions. Word has length 385 [2018-02-04 01:38:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:45,687 INFO L432 AbstractCegarLoop]: Abstraction has 390 states and 391 transitions. [2018-02-04 01:38:45,687 INFO L433 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-02-04 01:38:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 391 transitions. [2018-02-04 01:38:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2018-02-04 01:38:45,688 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:45,688 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 01:38:45,688 INFO L371 AbstractCegarLoop]: === Iteration 67 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash -740356266, now seen corresponding path program 65 times [2018-02-04 01:38:45,688 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:45,689 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:45,689 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:45,689 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:45,689 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:45,703 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:47,187 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 01:38:47,187 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:47,187 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 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 01:38:47,211 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:38:49,689 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-02-04 01:38:49,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:49,695 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:49,773 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 01:38:49,794 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:49,795 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-02-04 01:38:49,795 INFO L409 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-02-04 01:38:49,795 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-02-04 01:38:49,795 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-02-04 01:38:49,796 INFO L87 Difference]: Start difference. First operand 390 states and 391 transitions. Second operand 69 states. [2018-02-04 01:38:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:50,539 INFO L93 Difference]: Finished difference Result 620 states and 664 transitions. [2018-02-04 01:38:50,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-02-04 01:38:50,539 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 389 [2018-02-04 01:38:50,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:50,541 INFO L225 Difference]: With dead ends: 620 [2018-02-04 01:38:50,541 INFO L226 Difference]: Without dead ends: 620 [2018-02-04 01:38:50,541 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 01:38:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2018-02-04 01:38:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 394. [2018-02-04 01:38:50,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2018-02-04 01:38:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 395 transitions. [2018-02-04 01:38:50,543 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 395 transitions. Word has length 389 [2018-02-04 01:38:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:50,543 INFO L432 AbstractCegarLoop]: Abstraction has 394 states and 395 transitions. [2018-02-04 01:38:50,543 INFO L433 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-02-04 01:38:50,543 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 395 transitions. [2018-02-04 01:38:50,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2018-02-04 01:38:50,544 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:50,544 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 01:38:50,544 INFO L371 AbstractCegarLoop]: === Iteration 68 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:50,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1928286083, now seen corresponding path program 66 times [2018-02-04 01:38:50,545 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:50,545 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:50,545 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:50,545 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:50,545 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:50,554 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:51,930 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 01:38:51,930 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:51,930 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 01:38:51,935 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:38:52,198 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-02-04 01:38:52,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:52,201 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:52,260 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 01:38:52,278 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:52,278 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 26] total 72 [2018-02-04 01:38:52,279 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-02-04 01:38:52,279 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-02-04 01:38:52,279 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2510, Invalid=2602, Unknown=0, NotChecked=0, Total=5112 [2018-02-04 01:38:52,279 INFO L87 Difference]: Start difference. First operand 394 states and 395 transitions. Second operand 72 states. [2018-02-04 01:38:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:53,119 INFO L93 Difference]: Finished difference Result 629 states and 673 transitions. [2018-02-04 01:38:53,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-02-04 01:38:53,119 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 393 [2018-02-04 01:38:53,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:53,120 INFO L225 Difference]: With dead ends: 629 [2018-02-04 01:38:53,120 INFO L226 Difference]: Without dead ends: 629 [2018-02-04 01:38:53,121 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 01:38:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-02-04 01:38:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 403. [2018-02-04 01:38:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-02-04 01:38:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2018-02-04 01:38:53,123 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2018-02-04 01:38:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:53,124 INFO L432 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2018-02-04 01:38:53,124 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-02-04 01:38:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2018-02-04 01:38:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2018-02-04 01:38:53,125 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:53,125 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 01:38:53,125 INFO L371 AbstractCegarLoop]: === Iteration 69 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:53,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1074266018, now seen corresponding path program 67 times [2018-02-04 01:38:53,125 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:53,125 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:53,126 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:53,126 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:53,126 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:53,134 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:54,663 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 01:38:54,664 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:54,664 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 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 01:38:54,669 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:54,710 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:54,771 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 01:38:54,788 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:54,788 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-02-04 01:38:54,789 INFO L409 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-02-04 01:38:54,789 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-02-04 01:38:54,789 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-02-04 01:38:54,789 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 71 states. [2018-02-04 01:38:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:55,593 INFO L93 Difference]: Finished difference Result 638 states and 683 transitions. [2018-02-04 01:38:55,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-02-04 01:38:55,594 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 402 [2018-02-04 01:38:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:55,595 INFO L225 Difference]: With dead ends: 638 [2018-02-04 01:38:55,595 INFO L226 Difference]: Without dead ends: 638 [2018-02-04 01:38:55,595 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 01:38:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2018-02-04 01:38:55,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 407. [2018-02-04 01:38:55,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-02-04 01:38:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 408 transitions. [2018-02-04 01:38:55,597 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 408 transitions. Word has length 402 [2018-02-04 01:38:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:55,598 INFO L432 AbstractCegarLoop]: Abstraction has 407 states and 408 transitions. [2018-02-04 01:38:55,598 INFO L433 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-02-04 01:38:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 408 transitions. [2018-02-04 01:38:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2018-02-04 01:38:55,599 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:55,599 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 01:38:55,599 INFO L371 AbstractCegarLoop]: === Iteration 70 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash 587052695, now seen corresponding path program 68 times [2018-02-04 01:38:55,599 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:55,599 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:55,600 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:55,600 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:38:55,600 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:55,608 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:57,162 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 01:38:57,162 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:57,162 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 01:38:57,167 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:38:57,210 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:38:57,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:57,213 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:57,275 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 01:38:57,291 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:57,291 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-02-04 01:38:57,291 INFO L409 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-02-04 01:38:57,292 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-02-04 01:38:57,292 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-02-04 01:38:57,292 INFO L87 Difference]: Start difference. First operand 407 states and 408 transitions. Second operand 72 states. [2018-02-04 01:38:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:38:58,023 INFO L93 Difference]: Finished difference Result 647 states and 693 transitions. [2018-02-04 01:38:58,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-02-04 01:38:58,023 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 406 [2018-02-04 01:38:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:38:58,024 INFO L225 Difference]: With dead ends: 647 [2018-02-04 01:38:58,024 INFO L226 Difference]: Without dead ends: 647 [2018-02-04 01:38:58,024 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 01:38:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2018-02-04 01:38:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 411. [2018-02-04 01:38:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2018-02-04 01:38:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 412 transitions. [2018-02-04 01:38:58,027 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 412 transitions. Word has length 406 [2018-02-04 01:38:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:38:58,027 INFO L432 AbstractCegarLoop]: Abstraction has 411 states and 412 transitions. [2018-02-04 01:38:58,027 INFO L433 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-02-04 01:38:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 412 transitions. [2018-02-04 01:38:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-02-04 01:38:58,028 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:38:58,028 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 01:38:58,028 INFO L371 AbstractCegarLoop]: === Iteration 71 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:38:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2091145136, now seen corresponding path program 69 times [2018-02-04 01:38:58,028 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:38:58,028 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:38:58,029 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:58,029 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:38:58,029 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:38:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:38:58,037 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:38:59,414 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 01:38:59,415 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:38:59,415 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 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 01:38:59,419 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:38:59,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-02-04 01:38:59,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:38:59,503 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:38:59,563 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 01:38:59,579 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:38:59,579 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 27] total 75 [2018-02-04 01:38:59,579 INFO L409 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-02-04 01:38:59,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-02-04 01:38:59,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2727, Invalid=2823, Unknown=0, NotChecked=0, Total=5550 [2018-02-04 01:38:59,580 INFO L87 Difference]: Start difference. First operand 411 states and 412 transitions. Second operand 75 states. [2018-02-04 01:39:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:00,483 INFO L93 Difference]: Finished difference Result 656 states and 702 transitions. [2018-02-04 01:39:00,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-02-04 01:39:00,483 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 410 [2018-02-04 01:39:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:00,484 INFO L225 Difference]: With dead ends: 656 [2018-02-04 01:39:00,484 INFO L226 Difference]: Without dead ends: 656 [2018-02-04 01:39:00,485 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=4503, Invalid=5199, Unknown=0, NotChecked=0, Total=9702 [2018-02-04 01:39:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2018-02-04 01:39:00,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 420. [2018-02-04 01:39:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2018-02-04 01:39:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 421 transitions. [2018-02-04 01:39:00,487 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 421 transitions. Word has length 410 [2018-02-04 01:39:00,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:00,487 INFO L432 AbstractCegarLoop]: Abstraction has 420 states and 421 transitions. [2018-02-04 01:39:00,487 INFO L433 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-02-04 01:39:00,487 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 421 transitions. [2018-02-04 01:39:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-02-04 01:39:00,488 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:00,488 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 01:39:00,488 INFO L371 AbstractCegarLoop]: === Iteration 72 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash -57792487, now seen corresponding path program 70 times [2018-02-04 01:39:00,489 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:00,489 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:00,489 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:00,489 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:00,489 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:00,497 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:02,244 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 01:39:02,244 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:02,244 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 01:39:02,249 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:39:02,299 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:39:02,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:02,302 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:02,369 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 01:39:02,386 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:02,386 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-02-04 01:39:02,387 INFO L409 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-02-04 01:39:02,387 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-02-04 01:39:02,387 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-02-04 01:39:02,387 INFO L87 Difference]: Start difference. First operand 420 states and 421 transitions. Second operand 74 states. [2018-02-04 01:39:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:03,137 INFO L93 Difference]: Finished difference Result 665 states and 712 transitions. [2018-02-04 01:39:03,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-02-04 01:39:03,137 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 419 [2018-02-04 01:39:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:03,138 INFO L225 Difference]: With dead ends: 665 [2018-02-04 01:39:03,138 INFO L226 Difference]: Without dead ends: 665 [2018-02-04 01:39:03,138 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 01:39:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2018-02-04 01:39:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 424. [2018-02-04 01:39:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-02-04 01:39:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2018-02-04 01:39:03,141 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 419 [2018-02-04 01:39:03,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:03,141 INFO L432 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2018-02-04 01:39:03,141 INFO L433 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-02-04 01:39:03,141 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2018-02-04 01:39:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-02-04 01:39:03,142 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:03,142 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 01:39:03,142 INFO L371 AbstractCegarLoop]: === Iteration 73 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:03,143 INFO L82 PathProgramCache]: Analyzing trace with hash -546927872, now seen corresponding path program 71 times [2018-02-04 01:39:03,143 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:03,143 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:03,143 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:03,143 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:03,143 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:03,156 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:04,707 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 01:39:04,708 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:04,708 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 01:39:04,712 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:39:07,575 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-02-04 01:39:07,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:07,580 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:07,643 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 01:39:07,662 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:07,663 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-02-04 01:39:07,663 INFO L409 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-02-04 01:39:07,663 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-02-04 01:39:07,664 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-02-04 01:39:07,664 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand 75 states. [2018-02-04 01:39:08,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:08,454 INFO L93 Difference]: Finished difference Result 674 states and 722 transitions. [2018-02-04 01:39:08,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-02-04 01:39:08,455 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 423 [2018-02-04 01:39:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:08,456 INFO L225 Difference]: With dead ends: 674 [2018-02-04 01:39:08,456 INFO L226 Difference]: Without dead ends: 674 [2018-02-04 01:39:08,456 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 01:39:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2018-02-04 01:39:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 428. [2018-02-04 01:39:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2018-02-04 01:39:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 429 transitions. [2018-02-04 01:39:08,459 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 429 transitions. Word has length 423 [2018-02-04 01:39:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:08,459 INFO L432 AbstractCegarLoop]: Abstraction has 428 states and 429 transitions. [2018-02-04 01:39:08,459 INFO L433 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-02-04 01:39:08,459 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 429 transitions. [2018-02-04 01:39:08,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2018-02-04 01:39:08,460 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:08,460 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 01:39:08,460 INFO L371 AbstractCegarLoop]: === Iteration 74 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:08,460 INFO L82 PathProgramCache]: Analyzing trace with hash 133505639, now seen corresponding path program 72 times [2018-02-04 01:39:08,460 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:08,460 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:08,461 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:08,461 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:08,461 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:08,470 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:09,983 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 01:39:09,983 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:09,983 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 01:39:09,988 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:39:10,278 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-02-04 01:39:10,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:10,281 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:10,352 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 01:39:10,369 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:10,370 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 28] total 78 [2018-02-04 01:39:10,370 INFO L409 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-02-04 01:39:10,370 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-02-04 01:39:10,370 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2953, Invalid=3053, Unknown=0, NotChecked=0, Total=6006 [2018-02-04 01:39:10,370 INFO L87 Difference]: Start difference. First operand 428 states and 429 transitions. Second operand 78 states. [2018-02-04 01:39:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:11,247 INFO L93 Difference]: Finished difference Result 683 states and 731 transitions. [2018-02-04 01:39:11,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-02-04 01:39:11,248 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 427 [2018-02-04 01:39:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:11,249 INFO L225 Difference]: With dead ends: 683 [2018-02-04 01:39:11,249 INFO L226 Difference]: Without dead ends: 683 [2018-02-04 01:39:11,249 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 01:39:11,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2018-02-04 01:39:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 437. [2018-02-04 01:39:11,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2018-02-04 01:39:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 438 transitions. [2018-02-04 01:39:11,252 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 438 transitions. Word has length 427 [2018-02-04 01:39:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:11,252 INFO L432 AbstractCegarLoop]: Abstraction has 437 states and 438 transitions. [2018-02-04 01:39:11,252 INFO L433 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-02-04 01:39:11,252 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 438 transitions. [2018-02-04 01:39:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2018-02-04 01:39:11,253 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:11,253 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 01:39:11,253 INFO L371 AbstractCegarLoop]: === Iteration 75 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:11,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1816903052, now seen corresponding path program 73 times [2018-02-04 01:39:11,253 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:11,253 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:11,254 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:11,254 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:11,254 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:11,263 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:12,836 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 01:39:12,836 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:12,836 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 01:39:12,840 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:39:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:12,886 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:12,953 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 01:39:12,969 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:12,970 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-02-04 01:39:12,970 INFO L409 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-02-04 01:39:12,970 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-02-04 01:39:12,970 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-02-04 01:39:12,971 INFO L87 Difference]: Start difference. First operand 437 states and 438 transitions. Second operand 77 states. [2018-02-04 01:39:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:13,795 INFO L93 Difference]: Finished difference Result 692 states and 741 transitions. [2018-02-04 01:39:13,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-02-04 01:39:13,795 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 436 [2018-02-04 01:39:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:13,797 INFO L225 Difference]: With dead ends: 692 [2018-02-04 01:39:13,797 INFO L226 Difference]: Without dead ends: 692 [2018-02-04 01:39:13,797 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 01:39:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2018-02-04 01:39:13,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 441. [2018-02-04 01:39:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2018-02-04 01:39:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 442 transitions. [2018-02-04 01:39:13,800 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 442 transitions. Word has length 436 [2018-02-04 01:39:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:13,800 INFO L432 AbstractCegarLoop]: Abstraction has 441 states and 442 transitions. [2018-02-04 01:39:13,800 INFO L433 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-02-04 01:39:13,800 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 442 transitions. [2018-02-04 01:39:13,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-02-04 01:39:13,801 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:13,801 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 01:39:13,801 INFO L371 AbstractCegarLoop]: === Iteration 76 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:13,801 INFO L82 PathProgramCache]: Analyzing trace with hash -200332691, now seen corresponding path program 74 times [2018-02-04 01:39:13,801 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:13,801 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:13,802 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:13,802 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:39:13,802 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:13,811 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:15,373 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 01:39:15,373 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:15,373 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 01:39:15,378 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:39:15,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:39:15,418 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:15,421 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:15,496 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 01:39:15,512 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:15,512 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-02-04 01:39:15,512 INFO L409 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-02-04 01:39:15,512 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-02-04 01:39:15,513 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-02-04 01:39:15,513 INFO L87 Difference]: Start difference. First operand 441 states and 442 transitions. Second operand 78 states. [2018-02-04 01:39:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:16,436 INFO L93 Difference]: Finished difference Result 701 states and 751 transitions. [2018-02-04 01:39:16,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-02-04 01:39:16,436 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 440 [2018-02-04 01:39:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:16,437 INFO L225 Difference]: With dead ends: 701 [2018-02-04 01:39:16,437 INFO L226 Difference]: Without dead ends: 701 [2018-02-04 01:39:16,437 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 01:39:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2018-02-04 01:39:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 445. [2018-02-04 01:39:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2018-02-04 01:39:16,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 446 transitions. [2018-02-04 01:39:16,440 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 446 transitions. Word has length 440 [2018-02-04 01:39:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:16,440 INFO L432 AbstractCegarLoop]: Abstraction has 445 states and 446 transitions. [2018-02-04 01:39:16,440 INFO L433 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-02-04 01:39:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 446 transitions. [2018-02-04 01:39:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2018-02-04 01:39:16,441 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:16,441 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 01:39:16,441 INFO L371 AbstractCegarLoop]: === Iteration 77 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:16,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1548971494, now seen corresponding path program 75 times [2018-02-04 01:39:16,442 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:16,442 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:16,442 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:16,442 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:16,442 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:16,451 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:18,119 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 01:39:18,119 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:18,119 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 01:39:18,124 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:39:18,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-02-04 01:39:18,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:18,236 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:18,305 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 01:39:18,322 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:18,322 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 29] total 81 [2018-02-04 01:39:18,322 INFO L409 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-02-04 01:39:18,323 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-02-04 01:39:18,323 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3188, Invalid=3292, Unknown=0, NotChecked=0, Total=6480 [2018-02-04 01:39:18,323 INFO L87 Difference]: Start difference. First operand 445 states and 446 transitions. Second operand 81 states. [2018-02-04 01:39:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:19,361 INFO L93 Difference]: Finished difference Result 710 states and 760 transitions. [2018-02-04 01:39:19,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-02-04 01:39:19,362 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 444 [2018-02-04 01:39:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:19,363 INFO L225 Difference]: With dead ends: 710 [2018-02-04 01:39:19,363 INFO L226 Difference]: Without dead ends: 710 [2018-02-04 01:39:19,364 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5268, Invalid=6074, Unknown=0, NotChecked=0, Total=11342 [2018-02-04 01:39:19,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2018-02-04 01:39:19,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 454. [2018-02-04 01:39:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2018-02-04 01:39:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 455 transitions. [2018-02-04 01:39:19,366 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 455 transitions. Word has length 444 [2018-02-04 01:39:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:19,366 INFO L432 AbstractCegarLoop]: Abstraction has 454 states and 455 transitions. [2018-02-04 01:39:19,366 INFO L433 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-02-04 01:39:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 455 transitions. [2018-02-04 01:39:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2018-02-04 01:39:19,368 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:19,368 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 01:39:19,368 INFO L371 AbstractCegarLoop]: === Iteration 78 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1062868611, now seen corresponding path program 76 times [2018-02-04 01:39:19,368 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:19,368 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:19,368 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:19,368 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:19,368 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:19,378 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:21,065 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 01:39:21,065 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:21,065 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 01:39:21,070 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:39:21,117 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:39:21,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:21,121 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:21,195 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 01:39:21,211 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:21,211 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-02-04 01:39:21,212 INFO L409 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-02-04 01:39:21,212 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-02-04 01:39:21,212 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-02-04 01:39:21,212 INFO L87 Difference]: Start difference. First operand 454 states and 455 transitions. Second operand 80 states. [2018-02-04 01:39:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:21,971 INFO L93 Difference]: Finished difference Result 719 states and 770 transitions. [2018-02-04 01:39:21,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-02-04 01:39:21,971 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 453 [2018-02-04 01:39:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:21,972 INFO L225 Difference]: With dead ends: 719 [2018-02-04 01:39:21,972 INFO L226 Difference]: Without dead ends: 719 [2018-02-04 01:39:21,973 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-02-04 01:39:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2018-02-04 01:39:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 458. [2018-02-04 01:39:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2018-02-04 01:39:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 459 transitions. [2018-02-04 01:39:21,975 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 459 transitions. Word has length 453 [2018-02-04 01:39:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:21,975 INFO L432 AbstractCegarLoop]: Abstraction has 458 states and 459 transitions. [2018-02-04 01:39:21,975 INFO L433 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-02-04 01:39:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 459 transitions. [2018-02-04 01:39:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2018-02-04 01:39:21,977 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:21,977 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 01:39:21,977 INFO L371 AbstractCegarLoop]: === Iteration 79 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 858718122, now seen corresponding path program 77 times [2018-02-04 01:39:21,977 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:21,977 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:21,977 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:21,977 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:21,977 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:21,987 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:23,763 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 01:39:23,764 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:23,764 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 01:39:23,768 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:39:27,847 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-02-04 01:39:27,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:27,854 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:27,928 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 01:39:27,950 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:27,950 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-02-04 01:39:27,950 INFO L409 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-02-04 01:39:27,951 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-02-04 01:39:27,951 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-02-04 01:39:27,951 INFO L87 Difference]: Start difference. First operand 458 states and 459 transitions. Second operand 81 states. [2018-02-04 01:39:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:29,024 INFO L93 Difference]: Finished difference Result 728 states and 780 transitions. [2018-02-04 01:39:29,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-02-04 01:39:29,024 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 457 [2018-02-04 01:39:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:29,026 INFO L225 Difference]: With dead ends: 728 [2018-02-04 01:39:29,026 INFO L226 Difference]: Without dead ends: 728 [2018-02-04 01:39:29,027 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 01:39:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2018-02-04 01:39:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 462. [2018-02-04 01:39:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2018-02-04 01:39:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 463 transitions. [2018-02-04 01:39:29,031 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 463 transitions. Word has length 457 [2018-02-04 01:39:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:29,032 INFO L432 AbstractCegarLoop]: Abstraction has 462 states and 463 transitions. [2018-02-04 01:39:29,032 INFO L433 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-02-04 01:39:29,032 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 463 transitions. [2018-02-04 01:39:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2018-02-04 01:39:29,033 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:29,033 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 01:39:29,033 INFO L371 AbstractCegarLoop]: === Iteration 80 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash -225641135, now seen corresponding path program 78 times [2018-02-04 01:39:29,033 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:29,034 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:29,034 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:29,034 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:29,034 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:29,043 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:30,866 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 01:39:30,867 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:30,867 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 01:39:30,871 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:39:31,244 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-02-04 01:39:31,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:31,248 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:31,322 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 01:39:31,339 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:31,339 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 30] total 84 [2018-02-04 01:39:31,339 INFO L409 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-02-04 01:39:31,340 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-02-04 01:39:31,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3432, Invalid=3540, Unknown=0, NotChecked=0, Total=6972 [2018-02-04 01:39:31,340 INFO L87 Difference]: Start difference. First operand 462 states and 463 transitions. Second operand 84 states. [2018-02-04 01:39:32,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:32,383 INFO L93 Difference]: Finished difference Result 737 states and 789 transitions. [2018-02-04 01:39:32,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-02-04 01:39:32,408 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 461 [2018-02-04 01:39:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:32,409 INFO L225 Difference]: With dead ends: 737 [2018-02-04 01:39:32,409 INFO L226 Difference]: Without dead ends: 737 [2018-02-04 01:39:32,410 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 01:39:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2018-02-04 01:39:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 471. [2018-02-04 01:39:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2018-02-04 01:39:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2018-02-04 01:39:32,413 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 461 [2018-02-04 01:39:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:32,413 INFO L432 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2018-02-04 01:39:32,413 INFO L433 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-02-04 01:39:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2018-02-04 01:39:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2018-02-04 01:39:32,414 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:32,414 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 01:39:32,414 INFO L371 AbstractCegarLoop]: === Iteration 81 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:32,414 INFO L82 PathProgramCache]: Analyzing trace with hash 918702986, now seen corresponding path program 79 times [2018-02-04 01:39:32,414 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:32,414 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:32,415 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:32,415 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:32,415 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:32,424 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:34,271 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 01:39:34,271 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:34,271 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 01:39:34,277 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:39:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:34,323 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:34,400 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 01:39:34,416 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:34,416 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-02-04 01:39:34,417 INFO L409 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-02-04 01:39:34,417 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-02-04 01:39:34,417 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-02-04 01:39:34,418 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand 83 states. [2018-02-04 01:39:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:35,578 INFO L93 Difference]: Finished difference Result 746 states and 799 transitions. [2018-02-04 01:39:35,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-02-04 01:39:35,578 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 470 [2018-02-04 01:39:35,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:35,580 INFO L225 Difference]: With dead ends: 746 [2018-02-04 01:39:35,580 INFO L226 Difference]: Without dead ends: 746 [2018-02-04 01:39:35,580 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 01:39:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2018-02-04 01:39:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 475. [2018-02-04 01:39:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2018-02-04 01:39:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 476 transitions. [2018-02-04 01:39:35,583 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 476 transitions. Word has length 470 [2018-02-04 01:39:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:35,583 INFO L432 AbstractCegarLoop]: Abstraction has 475 states and 476 transitions. [2018-02-04 01:39:35,583 INFO L433 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-02-04 01:39:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 476 transitions. [2018-02-04 01:39:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2018-02-04 01:39:35,584 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:35,584 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 01:39:35,584 INFO L371 AbstractCegarLoop]: === Iteration 82 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:35,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1636436669, now seen corresponding path program 80 times [2018-02-04 01:39:35,584 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:35,584 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:35,585 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:35,585 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:39:35,585 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:35,595 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:37,530 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 01:39:37,530 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:37,530 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 01:39:37,535 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:39:37,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:39:37,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:37,586 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:37,676 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 01:39:37,692 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:37,692 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-02-04 01:39:37,693 INFO L409 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-02-04 01:39:37,693 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-02-04 01:39:37,693 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-02-04 01:39:37,693 INFO L87 Difference]: Start difference. First operand 475 states and 476 transitions. Second operand 84 states. [2018-02-04 01:39:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:38,781 INFO L93 Difference]: Finished difference Result 755 states and 809 transitions. [2018-02-04 01:39:38,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-02-04 01:39:38,781 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 474 [2018-02-04 01:39:38,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:38,782 INFO L225 Difference]: With dead ends: 755 [2018-02-04 01:39:38,782 INFO L226 Difference]: Without dead ends: 755 [2018-02-04 01:39:38,782 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 01:39:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2018-02-04 01:39:38,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 479. [2018-02-04 01:39:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-02-04 01:39:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 480 transitions. [2018-02-04 01:39:38,785 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 480 transitions. Word has length 474 [2018-02-04 01:39:38,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:38,785 INFO L432 AbstractCegarLoop]: Abstraction has 479 states and 480 transitions. [2018-02-04 01:39:38,785 INFO L433 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-02-04 01:39:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 480 transitions. [2018-02-04 01:39:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2018-02-04 01:39:38,786 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:38,786 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 01:39:38,786 INFO L371 AbstractCegarLoop]: === Iteration 83 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:38,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1281104508, now seen corresponding path program 81 times [2018-02-04 01:39:38,787 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:38,787 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:38,787 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:38,787 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:38,787 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:38,797 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:40,770 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 01:39:40,771 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:40,771 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 01:39:40,775 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:39:40,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-02-04 01:39:40,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:40,902 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:40,981 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 01:39:40,997 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:40,997 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 31] total 87 [2018-02-04 01:39:40,998 INFO L409 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-02-04 01:39:40,998 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-02-04 01:39:40,999 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3685, Invalid=3797, Unknown=0, NotChecked=0, Total=7482 [2018-02-04 01:39:40,999 INFO L87 Difference]: Start difference. First operand 479 states and 480 transitions. Second operand 87 states. [2018-02-04 01:39:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:42,228 INFO L93 Difference]: Finished difference Result 764 states and 818 transitions. [2018-02-04 01:39:42,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-02-04 01:39:42,228 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 478 [2018-02-04 01:39:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:42,229 INFO L225 Difference]: With dead ends: 764 [2018-02-04 01:39:42,229 INFO L226 Difference]: Without dead ends: 764 [2018-02-04 01:39:42,230 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 01:39:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2018-02-04 01:39:42,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 488. [2018-02-04 01:39:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2018-02-04 01:39:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 489 transitions. [2018-02-04 01:39:42,233 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 489 transitions. Word has length 478 [2018-02-04 01:39:42,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:42,233 INFO L432 AbstractCegarLoop]: Abstraction has 488 states and 489 transitions. [2018-02-04 01:39:42,233 INFO L433 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-02-04 01:39:42,233 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 489 transitions. [2018-02-04 01:39:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2018-02-04 01:39:42,234 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:42,234 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 01:39:42,234 INFO L371 AbstractCegarLoop]: === Iteration 84 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:42,235 INFO L82 PathProgramCache]: Analyzing trace with hash -657199635, now seen corresponding path program 82 times [2018-02-04 01:39:42,235 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:42,235 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:42,235 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:42,235 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:42,235 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:42,245 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:44,250 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 01:39:44,250 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:44,250 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 01:39:44,255 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:39:44,305 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:39:44,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:44,308 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:44,389 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 01:39:44,405 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:44,405 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-02-04 01:39:44,406 INFO L409 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-02-04 01:39:44,406 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-02-04 01:39:44,407 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-02-04 01:39:44,407 INFO L87 Difference]: Start difference. First operand 488 states and 489 transitions. Second operand 86 states. [2018-02-04 01:39:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:45,815 INFO L93 Difference]: Finished difference Result 773 states and 828 transitions. [2018-02-04 01:39:45,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-02-04 01:39:45,815 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 487 [2018-02-04 01:39:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:45,816 INFO L225 Difference]: With dead ends: 773 [2018-02-04 01:39:45,816 INFO L226 Difference]: Without dead ends: 773 [2018-02-04 01:39:45,817 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 01:39:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2018-02-04 01:39:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 492. [2018-02-04 01:39:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 492 states. [2018-02-04 01:39:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 493 transitions. [2018-02-04 01:39:45,820 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 493 transitions. Word has length 487 [2018-02-04 01:39:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:45,820 INFO L432 AbstractCegarLoop]: Abstraction has 492 states and 493 transitions. [2018-02-04 01:39:45,820 INFO L433 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-02-04 01:39:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 493 transitions. [2018-02-04 01:39:45,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2018-02-04 01:39:45,821 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:45,821 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 01:39:45,821 INFO L371 AbstractCegarLoop]: === Iteration 85 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:45,821 INFO L82 PathProgramCache]: Analyzing trace with hash -919351980, now seen corresponding path program 83 times [2018-02-04 01:39:45,821 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:45,821 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:45,822 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:45,822 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:45,822 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:45,832 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:47,838 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 01:39:47,838 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:47,838 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 01:39:47,843 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:39:53,278 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-02-04 01:39:53,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:53,285 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:53,373 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 01:39:53,395 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:53,395 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-02-04 01:39:53,395 INFO L409 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-02-04 01:39:53,396 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-02-04 01:39:53,396 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-02-04 01:39:53,396 INFO L87 Difference]: Start difference. First operand 492 states and 493 transitions. Second operand 87 states. [2018-02-04 01:39:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:54,842 INFO L93 Difference]: Finished difference Result 782 states and 838 transitions. [2018-02-04 01:39:54,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-02-04 01:39:54,842 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 491 [2018-02-04 01:39:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:54,843 INFO L225 Difference]: With dead ends: 782 [2018-02-04 01:39:54,843 INFO L226 Difference]: Without dead ends: 782 [2018-02-04 01:39:54,843 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-02-04 01:39:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2018-02-04 01:39:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 496. [2018-02-04 01:39:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-02-04 01:39:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 497 transitions. [2018-02-04 01:39:54,846 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 497 transitions. Word has length 491 [2018-02-04 01:39:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:54,846 INFO L432 AbstractCegarLoop]: Abstraction has 496 states and 497 transitions. [2018-02-04 01:39:54,846 INFO L433 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-02-04 01:39:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 497 transitions. [2018-02-04 01:39:54,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-02-04 01:39:54,848 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:54,848 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 01:39:54,848 INFO L371 AbstractCegarLoop]: === Iteration 86 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1103650501, now seen corresponding path program 84 times [2018-02-04 01:39:54,848 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:54,848 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:54,848 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:54,849 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:54,849 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:54,859 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:39:56,940 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 01:39:56,940 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:39:56,940 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 01:39:56,945 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:39:57,432 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 59 check-sat command(s) [2018-02-04 01:39:57,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:39:57,436 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:39:57,516 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 01:39:57,533 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:39:57,533 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 32] total 90 [2018-02-04 01:39:57,534 INFO L409 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-02-04 01:39:57,534 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-02-04 01:39:57,535 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3947, Invalid=4063, Unknown=0, NotChecked=0, Total=8010 [2018-02-04 01:39:57,535 INFO L87 Difference]: Start difference. First operand 496 states and 497 transitions. Second operand 90 states. [2018-02-04 01:39:58,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:39:58,938 INFO L93 Difference]: Finished difference Result 791 states and 847 transitions. [2018-02-04 01:39:58,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-02-04 01:39:58,938 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 495 [2018-02-04 01:39:58,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:39:58,939 INFO L225 Difference]: With dead ends: 791 [2018-02-04 01:39:58,939 INFO L226 Difference]: Without dead ends: 791 [2018-02-04 01:39:58,939 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 523 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=6528, Invalid=7514, Unknown=0, NotChecked=0, Total=14042 [2018-02-04 01:39:58,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2018-02-04 01:39:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 505. [2018-02-04 01:39:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2018-02-04 01:39:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2018-02-04 01:39:58,943 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 495 [2018-02-04 01:39:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:39:58,943 INFO L432 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2018-02-04 01:39:58,943 INFO L433 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-02-04 01:39:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2018-02-04 01:39:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2018-02-04 01:39:58,945 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:39:58,945 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 01:39:58,945 INFO L371 AbstractCegarLoop]: === Iteration 87 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:39:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1518683232, now seen corresponding path program 85 times [2018-02-04 01:39:58,946 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:39:58,946 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:39:58,946 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:58,946 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:39:58,946 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:39:58,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:39:58,965 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:01,236 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 01:40:01,236 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:01,236 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 01:40:01,242 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:40:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:01,290 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:01,401 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 01:40:01,419 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:01,419 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-02-04 01:40:01,420 INFO L409 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-02-04 01:40:01,420 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-02-04 01:40:01,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-02-04 01:40:01,420 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand 89 states. [2018-02-04 01:40:02,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:40:02,940 INFO L93 Difference]: Finished difference Result 800 states and 857 transitions. [2018-02-04 01:40:02,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-02-04 01:40:02,940 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 504 [2018-02-04 01:40:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:40:02,941 INFO L225 Difference]: With dead ends: 800 [2018-02-04 01:40:02,941 INFO L226 Difference]: Without dead ends: 800 [2018-02-04 01:40:02,941 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 01:40:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2018-02-04 01:40:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 509. [2018-02-04 01:40:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2018-02-04 01:40:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 510 transitions. [2018-02-04 01:40:02,944 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 510 transitions. Word has length 504 [2018-02-04 01:40:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:40:02,944 INFO L432 AbstractCegarLoop]: Abstraction has 509 states and 510 transitions. [2018-02-04 01:40:02,944 INFO L433 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-02-04 01:40:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 510 transitions. [2018-02-04 01:40:02,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-02-04 01:40:02,946 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:40:02,946 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 01:40:02,946 INFO L371 AbstractCegarLoop]: === Iteration 88 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:40:02,946 INFO L82 PathProgramCache]: Analyzing trace with hash -911821031, now seen corresponding path program 86 times [2018-02-04 01:40:02,946 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:40:02,946 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:40:02,946 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:02,946 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:40:02,946 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:02,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:02,957 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:05,146 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 01:40:05,146 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:05,146 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 01:40:05,151 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:40:05,196 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:40:05,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:40:05,200 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:05,288 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 01:40:05,304 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:05,305 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-02-04 01:40:05,305 INFO L409 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-02-04 01:40:05,305 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-02-04 01:40:05,305 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-02-04 01:40:05,306 INFO L87 Difference]: Start difference. First operand 509 states and 510 transitions. Second operand 90 states. [2018-02-04 01:40:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:40:06,874 INFO L93 Difference]: Finished difference Result 809 states and 867 transitions. [2018-02-04 01:40:06,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-02-04 01:40:06,875 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 508 [2018-02-04 01:40:06,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:40:06,876 INFO L225 Difference]: With dead ends: 809 [2018-02-04 01:40:06,876 INFO L226 Difference]: Without dead ends: 809 [2018-02-04 01:40:06,876 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 01:40:06,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2018-02-04 01:40:06,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 513. [2018-02-04 01:40:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-02-04 01:40:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 514 transitions. [2018-02-04 01:40:06,878 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 514 transitions. Word has length 508 [2018-02-04 01:40:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:40:06,879 INFO L432 AbstractCegarLoop]: Abstraction has 513 states and 514 transitions. [2018-02-04 01:40:06,879 INFO L433 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-02-04 01:40:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 514 transitions. [2018-02-04 01:40:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2018-02-04 01:40:06,880 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:40:06,880 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 01:40:06,880 INFO L371 AbstractCegarLoop]: === Iteration 89 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:40:06,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1207546350, now seen corresponding path program 87 times [2018-02-04 01:40:06,880 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:40:06,880 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:40:06,881 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:06,881 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:40:06,881 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:06,891 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:09,153 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 01:40:09,153 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:09,153 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 01:40:09,158 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:40:09,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2018-02-04 01:40:09,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:40:09,309 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:09,394 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 01:40:09,411 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:09,411 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 33] total 93 [2018-02-04 01:40:09,412 INFO L409 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-02-04 01:40:09,412 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-02-04 01:40:09,412 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4218, Invalid=4338, Unknown=0, NotChecked=0, Total=8556 [2018-02-04 01:40:09,413 INFO L87 Difference]: Start difference. First operand 513 states and 514 transitions. Second operand 93 states. [2018-02-04 01:40:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:40:10,967 INFO L93 Difference]: Finished difference Result 818 states and 876 transitions. [2018-02-04 01:40:10,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-02-04 01:40:10,967 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 512 [2018-02-04 01:40:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:40:10,968 INFO L225 Difference]: With dead ends: 818 [2018-02-04 01:40:10,968 INFO L226 Difference]: Without dead ends: 818 [2018-02-04 01:40:10,968 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 01:40:10,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2018-02-04 01:40:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 522. [2018-02-04 01:40:10,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2018-02-04 01:40:10,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 523 transitions. [2018-02-04 01:40:10,971 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 523 transitions. Word has length 512 [2018-02-04 01:40:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:40:10,971 INFO L432 AbstractCegarLoop]: Abstraction has 522 states and 523 transitions. [2018-02-04 01:40:10,971 INFO L433 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-02-04 01:40:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 523 transitions. [2018-02-04 01:40:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2018-02-04 01:40:10,973 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:40:10,973 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 01:40:10,973 INFO L371 AbstractCegarLoop]: === Iteration 90 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:40:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash 137563735, now seen corresponding path program 88 times [2018-02-04 01:40:10,973 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:40:10,973 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:40:10,973 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:10,973 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:40:10,974 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:10,984 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:13,305 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 01:40:13,305 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:13,305 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 01:40:13,310 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:40:13,360 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:40:13,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:40:13,364 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:13,466 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 01:40:13,482 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:13,482 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-02-04 01:40:13,483 INFO L409 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-02-04 01:40:13,483 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-02-04 01:40:13,483 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-02-04 01:40:13,483 INFO L87 Difference]: Start difference. First operand 522 states and 523 transitions. Second operand 92 states. [2018-02-04 01:40:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:40:14,703 INFO L93 Difference]: Finished difference Result 827 states and 886 transitions. [2018-02-04 01:40:14,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-02-04 01:40:14,703 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 521 [2018-02-04 01:40:14,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:40:14,704 INFO L225 Difference]: With dead ends: 827 [2018-02-04 01:40:14,704 INFO L226 Difference]: Without dead ends: 827 [2018-02-04 01:40:14,704 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 01:40:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2018-02-04 01:40:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 526. [2018-02-04 01:40:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2018-02-04 01:40:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 527 transitions. [2018-02-04 01:40:14,708 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 527 transitions. Word has length 521 [2018-02-04 01:40:14,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:40:14,709 INFO L432 AbstractCegarLoop]: Abstraction has 526 states and 527 transitions. [2018-02-04 01:40:14,709 INFO L433 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-02-04 01:40:14,709 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 527 transitions. [2018-02-04 01:40:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2018-02-04 01:40:14,711 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:40:14,711 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 01:40:14,711 INFO L371 AbstractCegarLoop]: === Iteration 91 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:40:14,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1360024574, now seen corresponding path program 89 times [2018-02-04 01:40:14,712 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:40:14,712 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:40:14,712 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:14,712 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:40:14,712 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:14,731 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:17,182 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 01:40:17,182 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:17,182 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 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 01:40:17,187 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-04 01:40:24,220 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-02-04 01:40:24,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:40:24,228 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:24,321 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 01:40:24,343 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:24,344 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-02-04 01:40:24,344 INFO L409 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-02-04 01:40:24,344 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-02-04 01:40:24,345 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-02-04 01:40:24,345 INFO L87 Difference]: Start difference. First operand 526 states and 527 transitions. Second operand 93 states. [2018-02-04 01:40:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:40:25,931 INFO L93 Difference]: Finished difference Result 836 states and 896 transitions. [2018-02-04 01:40:25,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-02-04 01:40:25,931 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 525 [2018-02-04 01:40:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:40:25,932 INFO L225 Difference]: With dead ends: 836 [2018-02-04 01:40:25,932 INFO L226 Difference]: Without dead ends: 836 [2018-02-04 01:40:25,933 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-02-04 01:40:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2018-02-04 01:40:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 530. [2018-02-04 01:40:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2018-02-04 01:40:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 531 transitions. [2018-02-04 01:40:25,935 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 531 transitions. Word has length 525 [2018-02-04 01:40:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:40:25,935 INFO L432 AbstractCegarLoop]: Abstraction has 530 states and 531 transitions. [2018-02-04 01:40:25,935 INFO L433 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-02-04 01:40:25,935 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 531 transitions. [2018-02-04 01:40:25,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2018-02-04 01:40:25,936 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:40:25,937 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 01:40:25,937 INFO L371 AbstractCegarLoop]: === Iteration 92 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:40:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1191940571, now seen corresponding path program 90 times [2018-02-04 01:40:25,937 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:40:25,937 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:40:25,937 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:25,937 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:40:25,937 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:25,948 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:28,354 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 01:40:28,354 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:28,354 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 01:40:28,359 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-04 01:40:28,957 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2018-02-04 01:40:28,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:40:28,961 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:29,055 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 01:40:29,073 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:29,073 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 34] total 96 [2018-02-04 01:40:29,073 INFO L409 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-02-04 01:40:29,074 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-02-04 01:40:29,074 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4498, Invalid=4622, Unknown=0, NotChecked=0, Total=9120 [2018-02-04 01:40:29,074 INFO L87 Difference]: Start difference. First operand 530 states and 531 transitions. Second operand 96 states. [2018-02-04 01:40:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:40:30,717 INFO L93 Difference]: Finished difference Result 845 states and 905 transitions. [2018-02-04 01:40:30,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-02-04 01:40:30,717 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 529 [2018-02-04 01:40:30,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:40:30,718 INFO L225 Difference]: With dead ends: 845 [2018-02-04 01:40:30,718 INFO L226 Difference]: Without dead ends: 845 [2018-02-04 01:40:30,718 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 01:40:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2018-02-04 01:40:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 539. [2018-02-04 01:40:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2018-02-04 01:40:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 540 transitions. [2018-02-04 01:40:30,721 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 540 transitions. Word has length 529 [2018-02-04 01:40:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:40:30,721 INFO L432 AbstractCegarLoop]: Abstraction has 539 states and 540 transitions. [2018-02-04 01:40:30,721 INFO L433 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-02-04 01:40:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 540 transitions. [2018-02-04 01:40:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2018-02-04 01:40:30,723 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:40:30,723 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 01:40:30,723 INFO L371 AbstractCegarLoop]: === Iteration 93 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:40:30,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1667878218, now seen corresponding path program 91 times [2018-02-04 01:40:30,723 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:40:30,723 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:40:30,724 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:30,724 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:40:30,724 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:30,735 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:33,269 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 01:40:33,269 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:33,269 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 01:40:33,274 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:40:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:33,330 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:33,430 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 01:40:33,447 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:33,447 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-02-04 01:40:33,447 INFO L409 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-02-04 01:40:33,448 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-02-04 01:40:33,448 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-02-04 01:40:33,448 INFO L87 Difference]: Start difference. First operand 539 states and 540 transitions. Second operand 95 states. [2018-02-04 01:40:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:40:34,709 INFO L93 Difference]: Finished difference Result 854 states and 915 transitions. [2018-02-04 01:40:34,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-02-04 01:40:34,709 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 538 [2018-02-04 01:40:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:40:34,710 INFO L225 Difference]: With dead ends: 854 [2018-02-04 01:40:34,710 INFO L226 Difference]: Without dead ends: 854 [2018-02-04 01:40:34,711 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 01:40:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2018-02-04 01:40:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 543. [2018-02-04 01:40:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-02-04 01:40:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 544 transitions. [2018-02-04 01:40:34,713 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 544 transitions. Word has length 538 [2018-02-04 01:40:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:40:34,714 INFO L432 AbstractCegarLoop]: Abstraction has 543 states and 544 transitions. [2018-02-04 01:40:34,714 INFO L433 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-02-04 01:40:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 544 transitions. [2018-02-04 01:40:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2018-02-04 01:40:34,715 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:40:34,715 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 01:40:34,715 INFO L371 AbstractCegarLoop]: === Iteration 94 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:40:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash 376836079, now seen corresponding path program 92 times [2018-02-04 01:40:34,716 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:40:34,716 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:40:34,716 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:34,716 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-04 01:40:34,716 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:34,727 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:37,313 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 01:40:37,313 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:37,313 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 01:40:37,318 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-04 01:40:37,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-04 01:40:37,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:40:37,379 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:37,483 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 01:40:37,498 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:37,499 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-02-04 01:40:37,499 INFO L409 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-02-04 01:40:37,499 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-02-04 01:40:37,499 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-02-04 01:40:37,500 INFO L87 Difference]: Start difference. First operand 543 states and 544 transitions. Second operand 96 states. [2018-02-04 01:40:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:40:39,032 INFO L93 Difference]: Finished difference Result 863 states and 925 transitions. [2018-02-04 01:40:39,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-02-04 01:40:39,032 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 542 [2018-02-04 01:40:39,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:40:39,033 INFO L225 Difference]: With dead ends: 863 [2018-02-04 01:40:39,033 INFO L226 Difference]: Without dead ends: 863 [2018-02-04 01:40:39,033 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-02-04 01:40:39,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2018-02-04 01:40:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 547. [2018-02-04 01:40:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2018-02-04 01:40:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 548 transitions. [2018-02-04 01:40:39,036 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 548 transitions. Word has length 542 [2018-02-04 01:40:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:40:39,036 INFO L432 AbstractCegarLoop]: Abstraction has 547 states and 548 transitions. [2018-02-04 01:40:39,036 INFO L433 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-02-04 01:40:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 548 transitions. [2018-02-04 01:40:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2018-02-04 01:40:39,038 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:40:39,038 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 01:40:39,038 INFO L371 AbstractCegarLoop]: === Iteration 95 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:40:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1237145432, now seen corresponding path program 93 times [2018-02-04 01:40:39,038 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:40:39,038 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:40:39,038 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:39,039 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:40:39,039 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:39,050 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:41,672 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 01:40:41,672 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:41,672 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 01:40:41,677 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-04 01:40:41,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-02-04 01:40:41,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:40:41,889 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:41,985 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 01:40:42,015 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:42,016 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 35] total 99 [2018-02-04 01:40:42,016 INFO L409 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-02-04 01:40:42,017 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-02-04 01:40:42,017 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4787, Invalid=4915, Unknown=0, NotChecked=0, Total=9702 [2018-02-04 01:40:42,017 INFO L87 Difference]: Start difference. First operand 547 states and 548 transitions. Second operand 99 states. [2018-02-04 01:40:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-04 01:40:43,849 INFO L93 Difference]: Finished difference Result 872 states and 934 transitions. [2018-02-04 01:40:43,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-02-04 01:40:43,850 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 546 [2018-02-04 01:40:43,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-04 01:40:43,850 INFO L225 Difference]: With dead ends: 872 [2018-02-04 01:40:43,850 INFO L226 Difference]: Without dead ends: 872 [2018-02-04 01:40:43,851 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 01:40:43,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2018-02-04 01:40:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 556. [2018-02-04 01:40:43,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-02-04 01:40:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 557 transitions. [2018-02-04 01:40:43,853 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 557 transitions. Word has length 546 [2018-02-04 01:40:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-04 01:40:43,853 INFO L432 AbstractCegarLoop]: Abstraction has 556 states and 557 transitions. [2018-02-04 01:40:43,853 INFO L433 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-02-04 01:40:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 557 transitions. [2018-02-04 01:40:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-02-04 01:40:43,855 INFO L343 BasicCegarLoop]: Found error trace [2018-02-04 01:40:43,855 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 01:40:43,855 INFO L371 AbstractCegarLoop]: === Iteration 96 === [mainErr0AssertViolation, mainErr1AssertViolation]=== [2018-02-04 01:40:43,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1028577217, now seen corresponding path program 94 times [2018-02-04 01:40:43,855 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-04 01:40:43,855 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-04 01:40:43,855 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:43,855 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-04 01:40:43,855 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-04 01:40:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-04 01:40:43,866 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-04 01:40:46,550 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 01:40:46,551 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-04 01:40:46,551 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 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 01:40:46,555 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-04 01:40:46,611 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-04 01:40:46,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-04 01:40:46,614 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-04 01:40:46,721 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 01:40:46,737 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-04 01:40:46,737 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-02-04 01:40:46,737 INFO L409 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-02-04 01:40:46,738 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-02-04 01:40:46,738 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-02-04 01:40:46,739 INFO L87 Difference]: Start difference. First operand 556 states and 557 transitions. Second operand 98 states. Received shutdown request... [2018-02-04 01:40:47,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-02-04 01:40:47,067 WARN L491 AbstractCegarLoop]: Verification canceled [2018-02-04 01:40:47,070 WARN L185 ceAbstractionStarter]: Timeout [2018-02-04 01:40:47,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.02 01:40:47 BoogieIcfgContainer [2018-02-04 01:40:47,070 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-04 01:40:47,071 INFO L168 Benchmark]: Toolchain (without parser) took 185180.49 ms. Allocated memory was 403.2 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 361.1 MB in the beginning and 827.1 MB in the end (delta: -465.9 MB). Peak memory consumption was 1.5 GB. Max. memory is 5.3 GB. [2018-02-04 01:40:47,071 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 403.2 MB. Free memory is still 366.5 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-04 01:40:47,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 119.45 ms. Allocated memory is still 403.2 MB. Free memory was 361.1 MB in the beginning and 353.0 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. [2018-02-04 01:40:47,072 INFO L168 Benchmark]: Boogie Preprocessor took 18.67 ms. Allocated memory is still 403.2 MB. Free memory was 353.0 MB in the beginning and 351.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-04 01:40:47,072 INFO L168 Benchmark]: RCFGBuilder took 121.37 ms. Allocated memory is still 403.2 MB. Free memory was 351.7 MB in the beginning and 338.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 5.3 GB. [2018-02-04 01:40:47,072 INFO L168 Benchmark]: TraceAbstraction took 184917.94 ms. Allocated memory was 403.2 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 338.4 MB in the beginning and 827.1 MB in the end (delta: -488.6 MB). Peak memory consumption was 1.5 GB. Max. memory is 5.3 GB. [2018-02-04 01:40:47,073 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 403.2 MB. Free memory is still 366.5 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 119.45 ms. Allocated memory is still 403.2 MB. Free memory was 361.1 MB in the beginning and 353.0 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 18.67 ms. Allocated memory is still 403.2 MB. Free memory was 353.0 MB in the beginning and 351.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 121.37 ms. Allocated memory is still 403.2 MB. Free memory was 351.7 MB in the beginning and 338.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 5.3 GB. * TraceAbstraction took 184917.94 ms. Allocated memory was 403.2 MB in the beginning and 2.4 GB in the end (delta: 2.0 GB). Free memory was 338.4 MB in the beginning and 827.1 MB in the end (delta: -488.6 MB). Peak memory consumption was 1.5 GB. 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 constructing difference of abstraction (556states) and interpolant automaton (currently 98 states, 98 states before enhancement), while ReachableStatesComputation was computing reachable states (473 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 15). Cancelled while BasicCegarLoop was constructing difference of abstraction (556states) and interpolant automaton (currently 98 states, 98 states before enhancement), while ReachableStatesComputation was computing reachable states (473 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 2 error locations. TIMEOUT Result, 184.8s OverallTime, 96 OverallIterations, 96 TraceHistogramMax, 53.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 939 SDtfs, 45123 SDslu, 19390 SDs, 0 SdLazy, 38693 SolverSat, 14781 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, 64.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=556occurred in iteration=95, 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, 95 MinimizatonAttempts, 15284 StatesRemovedByMinimization, 94 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_01-40-47-077.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_01-40-47-077.csv Completed graceful shutdown