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/array-examples/standard_strcpy_false-valid-deref_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-a74eeac-m [2018-02-02 18:30:05,329 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-02-02 18:30:05,331 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-02-02 18:30:05,342 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-02-02 18:30:05,342 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-02-02 18:30:05,343 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-02-02 18:30:05,343 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-02-02 18:30:05,344 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-02-02 18:30:05,346 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-02-02 18:30:05,346 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-02-02 18:30:05,347 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-02-02 18:30:05,347 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-02-02 18:30:05,348 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-02-02 18:30:05,349 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-02-02 18:30:05,350 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-02-02 18:30:05,352 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-02-02 18:30:05,353 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-02-02 18:30:05,355 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-02-02 18:30:05,356 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-02-02 18:30:05,356 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-02-02 18:30:05,358 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-02-02 18:30:05,358 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-02-02 18:30:05,359 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-02-02 18:30:05,359 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-02-02 18:30:05,360 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-02-02 18:30:05,361 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-02-02 18:30:05,361 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-02-02 18:30:05,362 INFO L177 SettingsManager]: PEA to Boogie provides no preferences, ignoring... [2018-02-02 18:30:05,362 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-02-02 18:30:05,362 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-02-02 18:30:05,362 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-02-02 18:30:05,363 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 [2018-02-02 18:30:05,372 INFO L110 SettingsManager]: Loading preferences was successful [2018-02-02 18:30:05,372 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-02-02 18:30:05,373 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-02-02 18:30:05,373 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-02-02 18:30:05,373 INFO L133 SettingsManager]: * Use SBE=true [2018-02-02 18:30:05,373 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-02-02 18:30:05,373 INFO L133 SettingsManager]: * sizeof long=4 [2018-02-02 18:30:05,374 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-02-02 18:30:05,374 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-02-02 18:30:05,374 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-02-02 18:30:05,374 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-02-02 18:30:05,374 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-02-02 18:30:05,374 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-02-02 18:30:05,374 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-02-02 18:30:05,375 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-02-02 18:30:05,375 INFO L133 SettingsManager]: * sizeof long double=12 [2018-02-02 18:30:05,375 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-02-02 18:30:05,375 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-02-02 18:30:05,375 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-02-02 18:30:05,375 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-02-02 18:30:05,375 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-02-02 18:30:05,376 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-02-02 18:30:05,376 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-02-02 18:30:05,376 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-02-02 18:30:05,376 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-02-02 18:30:05,405 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-02-02 18:30:05,414 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-02-02 18:30:05,416 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-02-02 18:30:05,417 INFO L271 PluginConnector]: Initializing CDTParser... [2018-02-02 18:30:05,418 INFO L276 PluginConnector]: CDTParser initialized [2018-02-02 18:30:05,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i [2018-02-02 18:30:05,534 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-02-02 18:30:05,535 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-02-02 18:30:05,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-02-02 18:30:05,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-02-02 18:30:05,543 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-02-02 18:30:05,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:30:05" (1/1) ... [2018-02-02 18:30:05,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fc999fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05, skipping insertion in model container [2018-02-02 18:30:05,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.02 06:30:05" (1/1) ... [2018-02-02 18:30:05,562 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:30:05,575 INFO L153 Dispatcher]: Using SV-COMP mode [2018-02-02 18:30:05,668 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:30:05,679 INFO L450 PostProcessor]: Settings: Checked method=main [2018-02-02 18:30:05,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05 WrapperNode [2018-02-02 18:30:05,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-02-02 18:30:05,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-02-02 18:30:05,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-02-02 18:30:05,683 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-02-02 18:30:05,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05" (1/1) ... [2018-02-02 18:30:05,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05" (1/1) ... [2018-02-02 18:30:05,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05" (1/1) ... [2018-02-02 18:30:05,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05" (1/1) ... [2018-02-02 18:30:05,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05" (1/1) ... [2018-02-02 18:30:05,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05" (1/1) ... [2018-02-02 18:30:05,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05" (1/1) ... [2018-02-02 18:30:05,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-02-02 18:30:05,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-02-02 18:30:05,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-02-02 18:30:05,706 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-02-02 18:30:05,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05" (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 [2018-02-02 18:30:05,745 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-02-02 18:30:05,745 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-02-02 18:30:05,745 INFO L136 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-02-02 18:30:05,745 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-02-02 18:30:05,745 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-02-02 18:30:05,745 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-02-02 18:30:05,745 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-02-02 18:30:05,745 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-02-02 18:30:05,745 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-02-02 18:30:05,838 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-02-02 18:30:05,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:30:05 BoogieIcfgContainer [2018-02-02 18:30:05,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-02-02 18:30:05,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-02-02 18:30:05,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-02-02 18:30:05,841 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-02-02 18:30:05,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.02 06:30:05" (1/3) ... [2018-02-02 18:30:05,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee3f4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:30:05, skipping insertion in model container [2018-02-02 18:30:05,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.02 06:30:05" (2/3) ... [2018-02-02 18:30:05,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee3f4bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.02 06:30:05, skipping insertion in model container [2018-02-02 18:30:05,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.02 06:30:05" (3/3) ... [2018-02-02 18:30:05,844 INFO L107 eAbstractionObserver]: Analyzing ICFG standard_strcpy_false-valid-deref_ground.i [2018-02-02 18:30:05,852 INFO L128 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-02-02 18:30:05,859 INFO L140 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-02-02 18:30:05,888 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-02-02 18:30:05,888 INFO L323 AbstractCegarLoop]: Hoare is false [2018-02-02 18:30:05,888 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-02-02 18:30:05,889 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-02-02 18:30:05,889 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-02-02 18:30:05,889 INFO L327 AbstractCegarLoop]: Difference is false [2018-02-02 18:30:05,889 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-02-02 18:30:05,889 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-02-02 18:30:05,890 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-02-02 18:30:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-02-02 18:30:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-02-02 18:30:05,905 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:05,905 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:05,905 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:05,908 INFO L82 PathProgramCache]: Analyzing trace with hash -42218404, now seen corresponding path program 1 times [2018-02-02 18:30:05,909 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:05,910 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:05,943 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:05,943 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:05,943 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:05,971 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,016 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:30:06,017 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-02-02 18:30:06,018 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-02-02 18:30:06,030 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-02-02 18:30:06,031 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-02-02 18:30:06,032 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2018-02-02 18:30:06,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:06,084 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-02-02 18:30:06,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-02-02 18:30:06,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-02-02 18:30:06,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:06,090 INFO L225 Difference]: With dead ends: 49 [2018-02-02 18:30:06,091 INFO L226 Difference]: Without dead ends: 40 [2018-02-02 18:30:06,092 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-02-02 18:30:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-02-02 18:30:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2018-02-02 18:30:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-02-02 18:30:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-02-02 18:30:06,117 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 7 [2018-02-02 18:30:06,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:06,117 INFO L432 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-02-02 18:30:06,117 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-02-02 18:30:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-02-02 18:30:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-02 18:30:06,117 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:06,118 INFO L351 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:06,118 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash -207595369, now seen corresponding path program 1 times [2018-02-02 18:30:06,118 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:06,118 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:06,119 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,119 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:06,119 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:06,176 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,209 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:06,209 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 [2018-02-02 18:30:06,217 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:06,227 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,255 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:06,255 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-02-02 18:30:06,256 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:30:06,256 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:30:06,256 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:30:06,256 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2018-02-02 18:30:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:06,295 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2018-02-02 18:30:06,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 18:30:06,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-02-02 18:30:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:06,297 INFO L225 Difference]: With dead ends: 54 [2018-02-02 18:30:06,297 INFO L226 Difference]: Without dead ends: 54 [2018-02-02 18:30:06,298 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:30:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-02-02 18:30:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2018-02-02 18:30:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-02-02 18:30:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2018-02-02 18:30:06,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 12 [2018-02-02 18:30:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:06,303 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2018-02-02 18:30:06,303 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:30:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2018-02-02 18:30:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-02-02 18:30:06,303 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:06,304 INFO L351 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:06,304 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:06,304 INFO L82 PathProgramCache]: Analyzing trace with hash -209255178, now seen corresponding path program 1 times [2018-02-02 18:30:06,304 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:06,304 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:06,305 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,305 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:06,305 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:06,311 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,336 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:30:06,336 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-02-02 18:30:06,337 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-02-02 18:30:06,337 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-02-02 18:30:06,337 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:30:06,337 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 4 states. [2018-02-02 18:30:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:06,364 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2018-02-02 18:30:06,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-02-02 18:30:06,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-02-02 18:30:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:06,365 INFO L225 Difference]: With dead ends: 39 [2018-02-02 18:30:06,365 INFO L226 Difference]: Without dead ends: 36 [2018-02-02 18:30:06,366 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-02-02 18:30:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-02-02 18:30:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-02-02 18:30:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-02-02 18:30:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-02-02 18:30:06,369 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 12 [2018-02-02 18:30:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:06,369 INFO L432 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-02-02 18:30:06,369 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-02-02 18:30:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-02-02 18:30:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 18:30:06,370 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:06,370 INFO L351 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:06,370 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:06,371 INFO L82 PathProgramCache]: Analyzing trace with hash 2132883772, now seen corresponding path program 2 times [2018-02-02 18:30:06,371 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:06,371 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:06,372 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,372 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:06,372 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:06,379 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,431 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:06,431 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 [2018-02-02 18:30:06,437 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:30:06,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:30:06,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:06,451 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,479 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:06,479 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-02-02 18:30:06,480 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-02-02 18:30:06,480 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-02-02 18:30:06,480 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:30:06,480 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2018-02-02 18:30:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:06,536 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2018-02-02 18:30:06,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-02-02 18:30:06,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-02-02 18:30:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:06,538 INFO L225 Difference]: With dead ends: 59 [2018-02-02 18:30:06,538 INFO L226 Difference]: Without dead ends: 59 [2018-02-02 18:30:06,538 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-02-02 18:30:06,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-02-02 18:30:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2018-02-02 18:30:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-02-02 18:30:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-02-02 18:30:06,542 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 17 [2018-02-02 18:30:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:06,542 INFO L432 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-02-02 18:30:06,542 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-02-02 18:30:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-02-02 18:30:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-02-02 18:30:06,543 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:06,543 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:06,543 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:06,543 INFO L82 PathProgramCache]: Analyzing trace with hash 2131223963, now seen corresponding path program 1 times [2018-02-02 18:30:06,543 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:06,543 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:06,544 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,544 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:06,544 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:06,551 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-02-02 18:30:06,571 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-02-02 18:30:06,571 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-02-02 18:30:06,571 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-02-02 18:30:06,571 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-02-02 18:30:06,572 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-02-02 18:30:06,572 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 3 states. [2018-02-02 18:30:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:06,591 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-02-02 18:30:06,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-02-02 18:30:06,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-02-02 18:30:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:06,594 INFO L225 Difference]: With dead ends: 47 [2018-02-02 18:30:06,594 INFO L226 Difference]: Without dead ends: 47 [2018-02-02 18:30:06,594 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-02-02 18:30:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-02-02 18:30:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-02-02 18:30:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-02-02 18:30:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-02-02 18:30:06,598 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 17 [2018-02-02 18:30:06,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:06,598 INFO L432 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-02-02 18:30:06,598 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-02-02 18:30:06,598 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-02-02 18:30:06,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-02-02 18:30:06,599 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:06,599 INFO L351 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:06,599 INFO L371 AbstractCegarLoop]: === Iteration 6 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:06,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2059138999, now seen corresponding path program 3 times [2018-02-02 18:30:06,600 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:06,600 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:06,600 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,600 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:06,601 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:06,607 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,650 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:06,650 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 [2018-02-02 18:30:06,655 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:30:06,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-02-02 18:30:06,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:06,662 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,686 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:06,686 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-02-02 18:30:06,686 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-02-02 18:30:06,686 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-02-02 18:30:06,687 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-02-02 18:30:06,687 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 7 states. [2018-02-02 18:30:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:06,742 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2018-02-02 18:30:06,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-02 18:30:06,742 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-02-02 18:30:06,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:06,743 INFO L225 Difference]: With dead ends: 89 [2018-02-02 18:30:06,743 INFO L226 Difference]: Without dead ends: 89 [2018-02-02 18:30:06,743 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-02-02 18:30:06,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-02-02 18:30:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 50. [2018-02-02 18:30:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-02-02 18:30:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-02-02 18:30:06,746 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 22 [2018-02-02 18:30:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:06,746 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-02-02 18:30:06,746 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-02-02 18:30:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-02-02 18:30:06,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-02-02 18:30:06,747 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:06,747 INFO L351 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:06,747 INFO L371 AbstractCegarLoop]: === Iteration 7 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:06,747 INFO L82 PathProgramCache]: Analyzing trace with hash -6617899, now seen corresponding path program 1 times [2018-02-02 18:30:06,747 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:06,747 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:06,748 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,748 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:06,748 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:06,755 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,794 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:06,794 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-02-02 18:30:06,805 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:06,814 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:06,857 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:06,858 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-02-02 18:30:06,858 INFO L409 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-02-02 18:30:06,858 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-02-02 18:30:06,858 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-02-02 18:30:06,858 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 8 states. [2018-02-02 18:30:06,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:06,932 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-02-02 18:30:06,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-02 18:30:06,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-02-02 18:30:06,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:06,933 INFO L225 Difference]: With dead ends: 59 [2018-02-02 18:30:06,933 INFO L226 Difference]: Without dead ends: 50 [2018-02-02 18:30:06,933 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-02-02 18:30:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-02-02 18:30:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-02-02 18:30:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-02-02 18:30:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2018-02-02 18:30:06,937 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 27 [2018-02-02 18:30:06,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:06,938 INFO L432 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2018-02-02 18:30:06,938 INFO L433 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-02-02 18:30:06,938 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2018-02-02 18:30:06,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-02-02 18:30:06,939 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:06,939 INFO L351 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:06,939 INFO L371 AbstractCegarLoop]: === Iteration 8 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1173615076, now seen corresponding path program 4 times [2018-02-02 18:30:06,939 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:06,939 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:06,940 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,940 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:06,940 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:06,957 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:07,016 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:07,016 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 [2018-02-02 18:30:07,022 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:30:07,028 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:30:07,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:07,029 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:07,053 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:07,053 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-02-02 18:30:07,053 INFO L409 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-02-02 18:30:07,053 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-02-02 18:30:07,053 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-02-02 18:30:07,054 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 7 states. [2018-02-02 18:30:07,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:07,156 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2018-02-02 18:30:07,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-02-02 18:30:07,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-02-02 18:30:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:07,157 INFO L225 Difference]: With dead ends: 94 [2018-02-02 18:30:07,157 INFO L226 Difference]: Without dead ends: 94 [2018-02-02 18:30:07,157 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-02-02 18:30:07,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-02-02 18:30:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2018-02-02 18:30:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-02-02 18:30:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2018-02-02 18:30:07,161 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 27 [2018-02-02 18:30:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:07,161 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2018-02-02 18:30:07,161 INFO L433 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-02-02 18:30:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2018-02-02 18:30:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-02-02 18:30:07,162 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:07,162 INFO L351 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:07,162 INFO L371 AbstractCegarLoop]: === Iteration 9 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:07,163 INFO L82 PathProgramCache]: Analyzing trace with hash 155329936, now seen corresponding path program 2 times [2018-02-02 18:30:07,163 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:07,163 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:07,164 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,164 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:07,164 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:07,173 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-02-02 18:30:07,226 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:07,226 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 [2018-02-02 18:30:07,233 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:30:07,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:30:07,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:07,243 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-02-02 18:30:07,277 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:07,277 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-02-02 18:30:07,277 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-02-02 18:30:07,277 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-02-02 18:30:07,277 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-02-02 18:30:07,277 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 6 states. [2018-02-02 18:30:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:07,303 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-02-02 18:30:07,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-02-02 18:30:07,303 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-02-02 18:30:07,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:07,303 INFO L225 Difference]: With dead ends: 55 [2018-02-02 18:30:07,303 INFO L226 Difference]: Without dead ends: 38 [2018-02-02 18:30:07,304 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-02-02 18:30:07,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-02-02 18:30:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-02-02 18:30:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-02-02 18:30:07,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-02-02 18:30:07,305 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2018-02-02 18:30:07,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:07,305 INFO L432 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-02-02 18:30:07,305 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-02-02 18:30:07,305 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-02-02 18:30:07,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-02-02 18:30:07,306 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:07,306 INFO L351 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:07,306 INFO L371 AbstractCegarLoop]: === Iteration 10 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1011667241, now seen corresponding path program 5 times [2018-02-02 18:30:07,306 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:07,306 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:07,307 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,307 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:07,307 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:07,311 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:07,353 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:07,353 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 [2018-02-02 18:30:07,358 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:30:07,371 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-02-02 18:30:07,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:07,373 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:07,429 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:07,429 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-02-02 18:30:07,429 INFO L409 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-02-02 18:30:07,429 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-02-02 18:30:07,429 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-02-02 18:30:07,430 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-02-02 18:30:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:07,497 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-02-02 18:30:07,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-02-02 18:30:07,497 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-02-02 18:30:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:07,498 INFO L225 Difference]: With dead ends: 43 [2018-02-02 18:30:07,498 INFO L226 Difference]: Without dead ends: 43 [2018-02-02 18:30:07,498 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-02-02 18:30:07,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-02-02 18:30:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-02-02 18:30:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-02-02 18:30:07,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-02-02 18:30:07,501 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 32 [2018-02-02 18:30:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:07,501 INFO L432 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-02-02 18:30:07,501 INFO L433 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-02-02 18:30:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-02-02 18:30:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-02-02 18:30:07,502 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:07,502 INFO L351 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:07,502 INFO L371 AbstractCegarLoop]: === Iteration 11 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:07,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2070263044, now seen corresponding path program 6 times [2018-02-02 18:30:07,502 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:07,502 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:07,503 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,503 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:07,503 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:07,509 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:07,560 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:07,560 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 [2018-02-02 18:30:07,565 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:30:07,574 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-02-02 18:30:07,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:07,575 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:07,617 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:07,617 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-02-02 18:30:07,617 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-02-02 18:30:07,617 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-02-02 18:30:07,618 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-02-02 18:30:07,618 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 13 states. [2018-02-02 18:30:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:07,703 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-02-02 18:30:07,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-02 18:30:07,703 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-02-02 18:30:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:07,704 INFO L225 Difference]: With dead ends: 48 [2018-02-02 18:30:07,704 INFO L226 Difference]: Without dead ends: 48 [2018-02-02 18:30:07,704 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2018-02-02 18:30:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-02-02 18:30:07,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-02-02 18:30:07,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-02-02 18:30:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-02-02 18:30:07,706 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 37 [2018-02-02 18:30:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:07,707 INFO L432 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-02-02 18:30:07,707 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-02-02 18:30:07,707 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-02-02 18:30:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-02-02 18:30:07,707 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:07,707 INFO L351 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:07,707 INFO L371 AbstractCegarLoop]: === Iteration 12 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1122500087, now seen corresponding path program 7 times [2018-02-02 18:30:07,708 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:07,708 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:07,708 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,708 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:07,708 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:07,715 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:07,777 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:07,777 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 [2018-02-02 18:30:07,782 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:07,790 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:07,867 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:07,868 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-02-02 18:30:07,868 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-02-02 18:30:07,868 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-02-02 18:30:07,868 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-02-02 18:30:07,868 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 19 states. [2018-02-02 18:30:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:07,957 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-02-02 18:30:07,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-02-02 18:30:07,957 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2018-02-02 18:30:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:07,957 INFO L225 Difference]: With dead ends: 53 [2018-02-02 18:30:07,957 INFO L226 Difference]: Without dead ends: 53 [2018-02-02 18:30:07,958 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-02-02 18:30:07,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-02-02 18:30:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-02-02 18:30:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-02-02 18:30:07,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-02-02 18:30:07,959 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 42 [2018-02-02 18:30:07,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:07,960 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-02-02 18:30:07,960 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-02-02 18:30:07,960 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-02-02 18:30:07,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-02-02 18:30:07,960 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:07,960 INFO L351 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:07,960 INFO L371 AbstractCegarLoop]: === Iteration 13 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash -676728868, now seen corresponding path program 8 times [2018-02-02 18:30:07,960 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:07,961 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:07,961 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,961 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:07,961 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:07,967 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:08,034 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:08,034 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 [2018-02-02 18:30:08,039 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:30:08,046 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:30:08,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:08,048 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:08,070 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:08,070 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-02-02 18:30:08,071 INFO L409 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-02-02 18:30:08,071 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-02-02 18:30:08,071 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-02-02 18:30:08,071 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 11 states. [2018-02-02 18:30:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:08,184 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-02-02 18:30:08,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-02-02 18:30:08,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-02-02 18:30:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:08,185 INFO L225 Difference]: With dead ends: 58 [2018-02-02 18:30:08,185 INFO L226 Difference]: Without dead ends: 58 [2018-02-02 18:30:08,185 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-02-02 18:30:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-02-02 18:30:08,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-02-02 18:30:08,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-02-02 18:30:08,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-02-02 18:30:08,187 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 47 [2018-02-02 18:30:08,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:08,188 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-02-02 18:30:08,188 INFO L433 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-02-02 18:30:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-02-02 18:30:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-02-02 18:30:08,189 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:08,189 INFO L351 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:08,189 INFO L371 AbstractCegarLoop]: === Iteration 14 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash -633576169, now seen corresponding path program 9 times [2018-02-02 18:30:08,189 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:08,189 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:08,190 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:08,190 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:08,190 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:08,198 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:08,268 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:08,268 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-02-02 18:30:08,273 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:30:08,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-02-02 18:30:08,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:08,304 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:08,338 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:08,338 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-02-02 18:30:08,338 INFO L409 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-02-02 18:30:08,338 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-02-02 18:30:08,338 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-02-02 18:30:08,338 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 13 states. [2018-02-02 18:30:08,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:08,430 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-02-02 18:30:08,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-02-02 18:30:08,430 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-02-02 18:30:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:08,431 INFO L225 Difference]: With dead ends: 63 [2018-02-02 18:30:08,431 INFO L226 Difference]: Without dead ends: 63 [2018-02-02 18:30:08,431 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2018-02-02 18:30:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-02-02 18:30:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-02-02 18:30:08,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-02-02 18:30:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-02-02 18:30:08,433 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 52 [2018-02-02 18:30:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:08,433 INFO L432 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-02-02 18:30:08,433 INFO L433 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-02-02 18:30:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-02-02 18:30:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-02-02 18:30:08,434 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:08,434 INFO L351 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:08,434 INFO L371 AbstractCegarLoop]: === Iteration 15 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:08,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1365705540, now seen corresponding path program 10 times [2018-02-02 18:30:08,434 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:08,434 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:08,435 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:08,435 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:08,435 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:08,441 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:08,541 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:08,541 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 [2018-02-02 18:30:08,552 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:30:08,562 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:30:08,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:08,564 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:08,672 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:08,672 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-02-02 18:30:08,673 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-02-02 18:30:08,673 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-02-02 18:30:08,673 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2018-02-02 18:30:08,673 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 25 states. [2018-02-02 18:30:08,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:08,843 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-02-02 18:30:08,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-02-02 18:30:08,843 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-02-02 18:30:08,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:08,843 INFO L225 Difference]: With dead ends: 68 [2018-02-02 18:30:08,843 INFO L226 Difference]: Without dead ends: 68 [2018-02-02 18:30:08,844 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2018-02-02 18:30:08,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-02-02 18:30:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-02-02 18:30:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-02-02 18:30:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-02-02 18:30:08,846 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 57 [2018-02-02 18:30:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:08,846 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-02-02 18:30:08,846 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-02-02 18:30:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-02-02 18:30:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-02-02 18:30:08,847 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:08,847 INFO L351 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:08,847 INFO L371 AbstractCegarLoop]: === Iteration 16 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:08,847 INFO L82 PathProgramCache]: Analyzing trace with hash -116235209, now seen corresponding path program 11 times [2018-02-02 18:30:08,847 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:08,847 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:08,848 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:08,848 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:08,848 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:08,856 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:08,953 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:08,953 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 [2018-02-02 18:30:08,958 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:30:08,976 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-02-02 18:30:08,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:08,978 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:09,098 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:09,098 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2018-02-02 18:30:09,098 INFO L409 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-02-02 18:30:09,098 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-02-02 18:30:09,099 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-02-02 18:30:09,099 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 26 states. [2018-02-02 18:30:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:09,385 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-02-02 18:30:09,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-02-02 18:30:09,385 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-02-02 18:30:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:09,386 INFO L225 Difference]: With dead ends: 73 [2018-02-02 18:30:09,386 INFO L226 Difference]: Without dead ends: 73 [2018-02-02 18:30:09,386 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2018-02-02 18:30:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-02-02 18:30:09,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-02-02 18:30:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-02-02 18:30:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-02-02 18:30:09,388 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 62 [2018-02-02 18:30:09,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:09,388 INFO L432 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-02-02 18:30:09,388 INFO L433 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-02-02 18:30:09,388 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-02-02 18:30:09,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-02-02 18:30:09,389 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:09,389 INFO L351 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:09,389 INFO L371 AbstractCegarLoop]: === Iteration 17 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash -414879332, now seen corresponding path program 12 times [2018-02-02 18:30:09,389 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:09,389 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:09,389 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:09,390 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:09,390 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:09,397 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:09,502 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:09,502 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 [2018-02-02 18:30:09,509 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:30:09,526 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-02-02 18:30:09,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:09,527 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:09,582 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:09,582 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2018-02-02 18:30:09,582 INFO L409 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-02-02 18:30:09,582 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-02-02 18:30:09,583 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-02-02 18:30:09,583 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 20 states. [2018-02-02 18:30:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:09,747 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-02-02 18:30:09,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-02-02 18:30:09,747 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2018-02-02 18:30:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:09,747 INFO L225 Difference]: With dead ends: 78 [2018-02-02 18:30:09,747 INFO L226 Difference]: Without dead ends: 78 [2018-02-02 18:30:09,748 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2018-02-02 18:30:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-02-02 18:30:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-02-02 18:30:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-02-02 18:30:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-02-02 18:30:09,749 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 67 [2018-02-02 18:30:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:09,749 INFO L432 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-02-02 18:30:09,749 INFO L433 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-02-02 18:30:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-02-02 18:30:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-02-02 18:30:09,750 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:09,750 INFO L351 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:09,750 INFO L371 AbstractCegarLoop]: === Iteration 18 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:09,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1135871145, now seen corresponding path program 13 times [2018-02-02 18:30:09,750 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:09,750 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:09,750 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:09,751 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:09,751 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:09,755 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:09,881 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:09,881 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 [2018-02-02 18:30:09,886 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:09,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:09,898 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:10,035 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:10,035 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2018-02-02 18:30:10,035 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-02-02 18:30:10,036 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-02-02 18:30:10,037 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-02-02 18:30:10,037 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 31 states. [2018-02-02 18:30:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:10,358 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-02-02 18:30:10,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-02-02 18:30:10,358 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-02-02 18:30:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:10,359 INFO L225 Difference]: With dead ends: 83 [2018-02-02 18:30:10,359 INFO L226 Difference]: Without dead ends: 83 [2018-02-02 18:30:10,359 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-02-02 18:30:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-02-02 18:30:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-02-02 18:30:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-02-02 18:30:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-02-02 18:30:10,361 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 72 [2018-02-02 18:30:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:10,361 INFO L432 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-02-02 18:30:10,361 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-02-02 18:30:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-02-02 18:30:10,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-02-02 18:30:10,361 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:10,362 INFO L351 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:10,362 INFO L371 AbstractCegarLoop]: === Iteration 19 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:10,362 INFO L82 PathProgramCache]: Analyzing trace with hash 571297404, now seen corresponding path program 14 times [2018-02-02 18:30:10,362 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:10,362 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:10,362 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:10,362 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:10,362 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:10,369 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:10,465 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:10,465 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 [2018-02-02 18:30:10,470 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:30:10,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:30:10,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:10,481 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:10,580 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:10,580 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2018-02-02 18:30:10,580 INFO L409 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-02-02 18:30:10,580 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-02-02 18:30:10,580 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2018-02-02 18:30:10,581 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 33 states. [2018-02-02 18:30:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:10,785 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-02-02 18:30:10,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-02-02 18:30:10,785 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 77 [2018-02-02 18:30:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:10,785 INFO L225 Difference]: With dead ends: 88 [2018-02-02 18:30:10,785 INFO L226 Difference]: Without dead ends: 88 [2018-02-02 18:30:10,786 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2018-02-02 18:30:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-02-02 18:30:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-02-02 18:30:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-02-02 18:30:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-02-02 18:30:10,787 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 77 [2018-02-02 18:30:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:10,787 INFO L432 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-02-02 18:30:10,787 INFO L433 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-02-02 18:30:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-02-02 18:30:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-02-02 18:30:10,788 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:10,788 INFO L351 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:10,788 INFO L371 AbstractCegarLoop]: === Iteration 20 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:10,788 INFO L82 PathProgramCache]: Analyzing trace with hash 239807095, now seen corresponding path program 15 times [2018-02-02 18:30:10,788 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:10,788 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:10,789 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:10,789 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:10,789 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:10,794 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:10,928 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:10,928 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:10,928 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 [2018-02-02 18:30:10,933 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:30:10,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-02-02 18:30:10,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:10,954 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:10,993 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:10,994 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-02-02 18:30:10,994 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-02-02 18:30:10,994 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-02-02 18:30:10,994 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-02-02 18:30:10,994 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 19 states. [2018-02-02 18:30:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:11,156 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-02-02 18:30:11,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-02-02 18:30:11,157 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2018-02-02 18:30:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:11,157 INFO L225 Difference]: With dead ends: 93 [2018-02-02 18:30:11,157 INFO L226 Difference]: Without dead ends: 93 [2018-02-02 18:30:11,157 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=411, Invalid=711, Unknown=0, NotChecked=0, Total=1122 [2018-02-02 18:30:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-02-02 18:30:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-02-02 18:30:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-02-02 18:30:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-02-02 18:30:11,159 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 82 [2018-02-02 18:30:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:11,159 INFO L432 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-02-02 18:30:11,159 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-02-02 18:30:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-02-02 18:30:11,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-02-02 18:30:11,160 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:11,160 INFO L351 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:11,160 INFO L371 AbstractCegarLoop]: === Iteration 21 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:11,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1580297380, now seen corresponding path program 16 times [2018-02-02 18:30:11,160 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:11,160 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:11,160 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:11,161 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:11,161 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:11,166 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:11,321 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:11,321 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 [2018-02-02 18:30:11,326 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:30:11,336 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:30:11,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:11,338 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:11,376 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:11,376 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-02-02 18:30:11,377 INFO L409 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-02-02 18:30:11,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-02-02 18:30:11,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-02-02 18:30:11,377 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 19 states. [2018-02-02 18:30:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:11,681 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-02-02 18:30:11,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-02-02 18:30:11,681 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2018-02-02 18:30:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:11,682 INFO L225 Difference]: With dead ends: 98 [2018-02-02 18:30:11,682 INFO L226 Difference]: Without dead ends: 98 [2018-02-02 18:30:11,682 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-02-02 18:30:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-02-02 18:30:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-02-02 18:30:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-02-02 18:30:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-02-02 18:30:11,683 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 87 [2018-02-02 18:30:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:11,683 INFO L432 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-02-02 18:30:11,683 INFO L433 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-02-02 18:30:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-02-02 18:30:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-02-02 18:30:11,684 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:11,684 INFO L351 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:11,684 INFO L371 AbstractCegarLoop]: === Iteration 22 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:11,684 INFO L82 PathProgramCache]: Analyzing trace with hash -957222505, now seen corresponding path program 17 times [2018-02-02 18:30:11,684 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:11,684 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:11,684 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:11,685 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:11,685 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:11,692 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:11,799 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:11,799 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 [2018-02-02 18:30:11,803 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:30:11,834 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-02-02 18:30:11,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:11,835 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:12,033 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:12,033 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2018-02-02 18:30:12,034 INFO L409 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-02-02 18:30:12,034 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-02-02 18:30:12,034 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-02-02 18:30:12,034 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 38 states. [2018-02-02 18:30:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:12,468 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-02-02 18:30:12,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-02-02 18:30:12,469 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-02-02 18:30:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:12,469 INFO L225 Difference]: With dead ends: 103 [2018-02-02 18:30:12,469 INFO L226 Difference]: Without dead ends: 103 [2018-02-02 18:30:12,470 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2018-02-02 18:30:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-02-02 18:30:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-02-02 18:30:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-02-02 18:30:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-02-02 18:30:12,472 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 92 [2018-02-02 18:30:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:12,472 INFO L432 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-02-02 18:30:12,472 INFO L433 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-02-02 18:30:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-02-02 18:30:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-02-02 18:30:12,473 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:12,473 INFO L351 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:12,473 INFO L371 AbstractCegarLoop]: === Iteration 23 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash 736575548, now seen corresponding path program 18 times [2018-02-02 18:30:12,474 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:12,474 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:12,474 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:12,474 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:12,475 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:12,482 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:12,625 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:12,625 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 [2018-02-02 18:30:12,629 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:30:12,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-02-02 18:30:12,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:12,654 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:12,725 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:12,725 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2018-02-02 18:30:12,725 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-02-02 18:30:12,726 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-02-02 18:30:12,726 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2018-02-02 18:30:12,726 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 25 states. [2018-02-02 18:30:12,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:12,957 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-02-02 18:30:12,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-02-02 18:30:12,957 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-02-02 18:30:12,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:12,958 INFO L225 Difference]: With dead ends: 108 [2018-02-02 18:30:12,958 INFO L226 Difference]: Without dead ends: 108 [2018-02-02 18:30:12,958 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=620, Invalid=1186, Unknown=0, NotChecked=0, Total=1806 [2018-02-02 18:30:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-02-02 18:30:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-02-02 18:30:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-02-02 18:30:12,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-02-02 18:30:12,959 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 97 [2018-02-02 18:30:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:12,960 INFO L432 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-02-02 18:30:12,960 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-02-02 18:30:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-02-02 18:30:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-02-02 18:30:12,960 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:12,961 INFO L351 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:12,961 INFO L371 AbstractCegarLoop]: === Iteration 24 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash -878554953, now seen corresponding path program 19 times [2018-02-02 18:30:12,961 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:12,961 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:12,961 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:12,961 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:12,961 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:12,966 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:13,104 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:13,104 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 [2018-02-02 18:30:13,108 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:13,121 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:13,292 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:13,292 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2018-02-02 18:30:13,292 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-02-02 18:30:13,292 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-02-02 18:30:13,293 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2018-02-02 18:30:13,293 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 43 states. [2018-02-02 18:30:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:13,766 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-02-02 18:30:13,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-02-02 18:30:13,766 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2018-02-02 18:30:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:13,767 INFO L225 Difference]: With dead ends: 113 [2018-02-02 18:30:13,767 INFO L226 Difference]: Without dead ends: 113 [2018-02-02 18:30:13,767 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2018-02-02 18:30:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-02-02 18:30:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-02-02 18:30:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-02-02 18:30:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-02-02 18:30:13,769 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 102 [2018-02-02 18:30:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:13,769 INFO L432 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-02-02 18:30:13,769 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-02-02 18:30:13,769 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-02-02 18:30:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-02-02 18:30:13,769 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:13,769 INFO L351 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:13,769 INFO L371 AbstractCegarLoop]: === Iteration 25 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:13,770 INFO L82 PathProgramCache]: Analyzing trace with hash -399157988, now seen corresponding path program 20 times [2018-02-02 18:30:13,770 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:13,770 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:13,770 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:13,770 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:13,770 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:13,776 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:13,931 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:13,931 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 [2018-02-02 18:30:13,936 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:30:13,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:30:13,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:13,950 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:14,193 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:14,193 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 44 [2018-02-02 18:30:14,193 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-02-02 18:30:14,194 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-02-02 18:30:14,194 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-02-02 18:30:14,194 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 45 states. [2018-02-02 18:30:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:14,739 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-02-02 18:30:14,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-02-02 18:30:14,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 107 [2018-02-02 18:30:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:14,740 INFO L225 Difference]: With dead ends: 118 [2018-02-02 18:30:14,740 INFO L226 Difference]: Without dead ends: 118 [2018-02-02 18:30:14,740 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-02-02 18:30:14,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-02-02 18:30:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-02-02 18:30:14,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-02-02 18:30:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-02-02 18:30:14,742 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 107 [2018-02-02 18:30:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:14,742 INFO L432 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-02-02 18:30:14,742 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-02-02 18:30:14,743 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-02-02 18:30:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-02-02 18:30:14,743 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:14,743 INFO L351 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:14,743 INFO L371 AbstractCegarLoop]: === Iteration 26 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash 792610775, now seen corresponding path program 21 times [2018-02-02 18:30:14,744 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:14,744 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:14,744 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:14,744 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:14,744 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:14,752 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:14,968 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:14,968 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 [2018-02-02 18:30:14,973 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:30:15,015 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-02-02 18:30:15,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:15,017 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:15,061 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:15,061 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-02-02 18:30:15,061 INFO L409 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-02-02 18:30:15,061 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-02-02 18:30:15,061 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-02-02 18:30:15,061 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 25 states. [2018-02-02 18:30:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:15,305 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-02-02 18:30:15,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-02-02 18:30:15,305 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 112 [2018-02-02 18:30:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:15,305 INFO L225 Difference]: With dead ends: 123 [2018-02-02 18:30:15,305 INFO L226 Difference]: Without dead ends: 123 [2018-02-02 18:30:15,306 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=762, Invalid=1308, Unknown=0, NotChecked=0, Total=2070 [2018-02-02 18:30:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-02-02 18:30:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-02-02 18:30:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-02-02 18:30:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-02-02 18:30:15,308 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 112 [2018-02-02 18:30:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:15,308 INFO L432 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-02-02 18:30:15,309 INFO L433 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-02-02 18:30:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-02-02 18:30:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-02-02 18:30:15,309 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:15,309 INFO L351 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:15,309 INFO L371 AbstractCegarLoop]: === Iteration 27 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:15,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1092014588, now seen corresponding path program 22 times [2018-02-02 18:30:15,310 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:15,310 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:15,310 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:15,310 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:15,311 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:15,318 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:15,527 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:15,527 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 [2018-02-02 18:30:15,534 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:30:15,549 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:30:15,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:15,551 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:15,795 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:15,795 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 48 [2018-02-02 18:30:15,795 INFO L409 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-02-02 18:30:15,796 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-02-02 18:30:15,796 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1752, Unknown=0, NotChecked=0, Total=2352 [2018-02-02 18:30:15,796 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 49 states. [2018-02-02 18:30:16,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:16,225 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-02-02 18:30:16,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-02-02 18:30:16,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2018-02-02 18:30:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:16,226 INFO L225 Difference]: With dead ends: 128 [2018-02-02 18:30:16,226 INFO L226 Difference]: Without dead ends: 128 [2018-02-02 18:30:16,227 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=600, Invalid=1752, Unknown=0, NotChecked=0, Total=2352 [2018-02-02 18:30:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-02-02 18:30:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-02-02 18:30:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-02-02 18:30:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-02-02 18:30:16,229 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 117 [2018-02-02 18:30:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:16,229 INFO L432 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-02-02 18:30:16,230 INFO L433 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-02-02 18:30:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-02-02 18:30:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-02-02 18:30:16,230 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:16,230 INFO L351 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:16,230 INFO L371 AbstractCegarLoop]: === Iteration 28 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:16,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1378342647, now seen corresponding path program 23 times [2018-02-02 18:30:16,231 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:16,231 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:16,231 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:16,231 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:16,232 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:16,239 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:16,514 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:16,514 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 [2018-02-02 18:30:16,520 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:30:16,587 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-02-02 18:30:16,587 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:16,590 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:16,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:16,862 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:16,862 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2018-02-02 18:30:16,862 INFO L409 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-02-02 18:30:16,862 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-02-02 18:30:16,863 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-02-02 18:30:16,863 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 50 states. [2018-02-02 18:30:17,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:17,466 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-02-02 18:30:17,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-02-02 18:30:17,466 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-02-02 18:30:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:17,466 INFO L225 Difference]: With dead ends: 133 [2018-02-02 18:30:17,466 INFO L226 Difference]: Without dead ends: 133 [2018-02-02 18:30:17,467 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2018-02-02 18:30:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-02-02 18:30:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-02-02 18:30:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-02-02 18:30:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-02-02 18:30:17,469 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 122 [2018-02-02 18:30:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:17,469 INFO L432 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-02-02 18:30:17,469 INFO L433 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-02-02 18:30:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-02-02 18:30:17,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-02-02 18:30:17,470 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:17,470 INFO L351 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:17,470 INFO L371 AbstractCegarLoop]: === Iteration 29 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1016482084, now seen corresponding path program 24 times [2018-02-02 18:30:17,470 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:17,470 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:17,470 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:17,471 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:17,471 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:17,476 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:17,662 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:17,662 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 [2018-02-02 18:30:17,667 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:30:17,709 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-02-02 18:30:17,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:17,711 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:17,843 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:17,844 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 36 [2018-02-02 18:30:17,844 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-02-02 18:30:17,844 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-02-02 18:30:17,844 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=932, Unknown=0, NotChecked=0, Total=1332 [2018-02-02 18:30:17,844 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 37 states. [2018-02-02 18:30:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:18,336 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-02-02 18:30:18,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-02-02 18:30:18,336 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 127 [2018-02-02 18:30:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:18,337 INFO L225 Difference]: With dead ends: 138 [2018-02-02 18:30:18,337 INFO L226 Difference]: Without dead ends: 138 [2018-02-02 18:30:18,338 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1067, Invalid=2593, Unknown=0, NotChecked=0, Total=3660 [2018-02-02 18:30:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-02-02 18:30:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-02-02 18:30:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-02-02 18:30:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-02-02 18:30:18,340 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 127 [2018-02-02 18:30:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:18,340 INFO L432 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-02-02 18:30:18,340 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-02-02 18:30:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-02-02 18:30:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-02-02 18:30:18,341 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:18,341 INFO L351 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:18,341 INFO L371 AbstractCegarLoop]: === Iteration 30 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash 37813783, now seen corresponding path program 25 times [2018-02-02 18:30:18,342 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:18,342 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:18,342 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:18,342 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:18,342 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:18,350 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:18,583 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:18,583 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 [2018-02-02 18:30:18,588 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:18,605 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:18,828 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:18,829 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 54 [2018-02-02 18:30:18,829 INFO L409 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-02-02 18:30:18,829 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-02-02 18:30:18,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2018-02-02 18:30:18,830 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 55 states. [2018-02-02 18:30:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:19,434 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-02-02 18:30:19,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-02-02 18:30:19,434 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 132 [2018-02-02 18:30:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:19,434 INFO L225 Difference]: With dead ends: 143 [2018-02-02 18:30:19,434 INFO L226 Difference]: Without dead ends: 143 [2018-02-02 18:30:19,435 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2018-02-02 18:30:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-02-02 18:30:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-02-02 18:30:19,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-02-02 18:30:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-02-02 18:30:19,437 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 132 [2018-02-02 18:30:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:19,437 INFO L432 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-02-02 18:30:19,437 INFO L433 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-02-02 18:30:19,437 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-02-02 18:30:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-02-02 18:30:19,438 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:19,438 INFO L351 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:19,438 INFO L371 AbstractCegarLoop]: === Iteration 31 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:19,438 INFO L82 PathProgramCache]: Analyzing trace with hash -24378436, now seen corresponding path program 26 times [2018-02-02 18:30:19,438 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:19,438 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:19,439 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:19,439 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:19,439 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:19,446 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:19,723 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:19,723 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-02-02 18:30:19,728 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:30:19,742 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:30:19,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:19,743 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:19,993 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:19,993 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 56 [2018-02-02 18:30:19,993 INFO L409 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-02-02 18:30:19,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-02-02 18:30:19,994 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=2380, Unknown=0, NotChecked=0, Total=3192 [2018-02-02 18:30:19,994 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 57 states. [2018-02-02 18:30:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:20,509 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-02-02 18:30:20,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-02-02 18:30:20,510 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 137 [2018-02-02 18:30:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:20,510 INFO L225 Difference]: With dead ends: 148 [2018-02-02 18:30:20,510 INFO L226 Difference]: Without dead ends: 148 [2018-02-02 18:30:20,511 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=812, Invalid=2380, Unknown=0, NotChecked=0, Total=3192 [2018-02-02 18:30:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-02-02 18:30:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-02-02 18:30:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-02-02 18:30:20,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-02-02 18:30:20,512 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 137 [2018-02-02 18:30:20,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:20,512 INFO L432 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-02-02 18:30:20,513 INFO L433 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-02-02 18:30:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-02-02 18:30:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-02-02 18:30:20,513 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:20,513 INFO L351 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:20,513 INFO L371 AbstractCegarLoop]: === Iteration 32 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:20,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1695826633, now seen corresponding path program 27 times [2018-02-02 18:30:20,513 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:20,513 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:20,514 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:20,514 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:20,514 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:20,518 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:20,788 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:20,788 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 [2018-02-02 18:30:20,793 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:30:20,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-02-02 18:30:20,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:20,862 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:20,893 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:20,893 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-02-02 18:30:20,894 INFO L409 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-02-02 18:30:20,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-02-02 18:30:20,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-02-02 18:30:20,894 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 31 states. [2018-02-02 18:30:21,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:21,231 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-02-02 18:30:21,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-02-02 18:30:21,232 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 142 [2018-02-02 18:30:21,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:21,232 INFO L225 Difference]: With dead ends: 153 [2018-02-02 18:30:21,232 INFO L226 Difference]: Without dead ends: 153 [2018-02-02 18:30:21,233 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1221, Invalid=2085, Unknown=0, NotChecked=0, Total=3306 [2018-02-02 18:30:21,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-02-02 18:30:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-02-02 18:30:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-02-02 18:30:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-02-02 18:30:21,234 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 142 [2018-02-02 18:30:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:21,235 INFO L432 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-02-02 18:30:21,235 INFO L433 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-02-02 18:30:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-02-02 18:30:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-02-02 18:30:21,235 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:21,235 INFO L351 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:21,235 INFO L371 AbstractCegarLoop]: === Iteration 33 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1683732636, now seen corresponding path program 28 times [2018-02-02 18:30:21,235 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:21,235 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:21,236 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:21,236 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:21,236 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:21,241 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:21,497 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:21,497 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 [2018-02-02 18:30:21,501 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:30:21,516 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:30:21,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:21,518 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:21,817 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:21,817 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 60 [2018-02-02 18:30:21,817 INFO L409 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-02-02 18:30:21,817 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-02-02 18:30:21,818 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=2790, Unknown=0, NotChecked=0, Total=3660 [2018-02-02 18:30:21,818 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 61 states. [2018-02-02 18:30:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:22,822 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-02-02 18:30:22,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-02-02 18:30:22,823 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 147 [2018-02-02 18:30:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:22,824 INFO L225 Difference]: With dead ends: 158 [2018-02-02 18:30:22,824 INFO L226 Difference]: Without dead ends: 158 [2018-02-02 18:30:22,824 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=870, Invalid=2790, Unknown=0, NotChecked=0, Total=3660 [2018-02-02 18:30:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-02-02 18:30:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-02-02 18:30:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-02-02 18:30:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-02-02 18:30:22,827 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 147 [2018-02-02 18:30:22,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:22,828 INFO L432 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-02-02 18:30:22,828 INFO L433 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-02-02 18:30:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-02-02 18:30:22,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-02-02 18:30:22,828 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:22,829 INFO L351 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:22,829 INFO L371 AbstractCegarLoop]: === Iteration 34 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:22,829 INFO L82 PathProgramCache]: Analyzing trace with hash 621417559, now seen corresponding path program 29 times [2018-02-02 18:30:22,829 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:22,829 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:22,830 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:22,830 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:22,830 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:22,836 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:23,153 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:23,153 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 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 [2018-02-02 18:30:23,158 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:30:23,273 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-02-02 18:30:23,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:23,275 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:23,602 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:23,603 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2018-02-02 18:30:23,603 INFO L409 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-02-02 18:30:23,603 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-02-02 18:30:23,604 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-02-02 18:30:23,604 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 62 states. [2018-02-02 18:30:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:24,768 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-02-02 18:30:24,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-02-02 18:30:24,768 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-02-02 18:30:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:24,769 INFO L225 Difference]: With dead ends: 163 [2018-02-02 18:30:24,769 INFO L226 Difference]: Without dead ends: 163 [2018-02-02 18:30:24,769 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2018-02-02 18:30:24,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-02-02 18:30:24,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-02-02 18:30:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-02-02 18:30:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-02-02 18:30:24,771 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 152 [2018-02-02 18:30:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:24,771 INFO L432 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-02-02 18:30:24,771 INFO L433 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-02-02 18:30:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-02-02 18:30:24,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-02-02 18:30:24,771 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:24,771 INFO L351 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:24,771 INFO L371 AbstractCegarLoop]: === Iteration 35 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:24,772 INFO L82 PathProgramCache]: Analyzing trace with hash 691459452, now seen corresponding path program 30 times [2018-02-02 18:30:24,772 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:24,772 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:24,772 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:24,772 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:24,772 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:24,777 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:25,094 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:25,094 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-02-02 18:30:25,098 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:30:25,210 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-02-02 18:30:25,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:25,212 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:25,282 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:25,283 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 36 [2018-02-02 18:30:25,283 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-02-02 18:30:25,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-02-02 18:30:25,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=818, Unknown=0, NotChecked=0, Total=1332 [2018-02-02 18:30:25,283 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 37 states. [2018-02-02 18:30:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:25,749 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-02-02 18:30:25,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-02-02 18:30:25,749 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 157 [2018-02-02 18:30:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:25,750 INFO L225 Difference]: With dead ends: 168 [2018-02-02 18:30:25,750 INFO L226 Difference]: Without dead ends: 168 [2018-02-02 18:30:25,751 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1562, Invalid=2860, Unknown=0, NotChecked=0, Total=4422 [2018-02-02 18:30:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-02-02 18:30:25,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-02-02 18:30:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-02-02 18:30:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-02-02 18:30:25,753 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 157 [2018-02-02 18:30:25,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:25,754 INFO L432 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-02-02 18:30:25,754 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-02-02 18:30:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-02-02 18:30:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-02-02 18:30:25,754 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:25,754 INFO L351 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:25,755 INFO L371 AbstractCegarLoop]: === Iteration 36 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1996358519, now seen corresponding path program 31 times [2018-02-02 18:30:25,755 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:25,755 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:25,755 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:25,756 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:25,756 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:25,763 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:26,105 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:26,105 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-02-02 18:30:26,110 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:26,128 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:26,445 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:26,446 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 66 [2018-02-02 18:30:26,446 INFO L409 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-02-02 18:30:26,446 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-02-02 18:30:26,447 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2018-02-02 18:30:26,447 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 67 states. [2018-02-02 18:30:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:27,453 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-02-02 18:30:27,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-02-02 18:30:27,458 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 162 [2018-02-02 18:30:27,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:27,458 INFO L225 Difference]: With dead ends: 173 [2018-02-02 18:30:27,458 INFO L226 Difference]: Without dead ends: 173 [2018-02-02 18:30:27,459 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2018-02-02 18:30:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-02-02 18:30:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-02-02 18:30:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-02-02 18:30:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-02-02 18:30:27,461 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 162 [2018-02-02 18:30:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:27,461 INFO L432 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-02-02 18:30:27,461 INFO L433 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-02-02 18:30:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-02-02 18:30:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-02-02 18:30:27,462 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:27,462 INFO L351 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:27,462 INFO L371 AbstractCegarLoop]: === Iteration 37 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:27,462 INFO L82 PathProgramCache]: Analyzing trace with hash 603675228, now seen corresponding path program 32 times [2018-02-02 18:30:27,462 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:27,462 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:27,463 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:27,463 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:27,463 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:27,468 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:27,928 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:27,939 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 [2018-02-02 18:30:27,944 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:30:27,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:30:27,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:27,964 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:28,025 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:28,025 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-02-02 18:30:28,025 INFO L409 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-02-02 18:30:28,025 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-02-02 18:30:28,025 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-02-02 18:30:28,026 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 35 states. [2018-02-02 18:30:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:29,083 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-02-02 18:30:29,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-02-02 18:30:29,084 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 167 [2018-02-02 18:30:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:29,084 INFO L225 Difference]: With dead ends: 178 [2018-02-02 18:30:29,084 INFO L226 Difference]: Without dead ends: 178 [2018-02-02 18:30:29,085 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-02-02 18:30:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-02-02 18:30:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-02-02 18:30:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-02-02 18:30:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-02-02 18:30:29,086 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 167 [2018-02-02 18:30:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:29,087 INFO L432 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-02-02 18:30:29,087 INFO L433 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-02-02 18:30:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-02-02 18:30:29,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-02-02 18:30:29,088 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:29,088 INFO L351 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:29,088 INFO L371 AbstractCegarLoop]: === Iteration 38 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:29,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1420397207, now seen corresponding path program 33 times [2018-02-02 18:30:29,088 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:29,088 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:29,089 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:29,089 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:29,089 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:29,094 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:29,598 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:29,598 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 [2018-02-02 18:30:29,605 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:30:29,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-02-02 18:30:29,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:29,721 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:29,786 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:29,786 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-02-02 18:30:29,787 INFO L409 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-02-02 18:30:29,787 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-02-02 18:30:29,787 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-02-02 18:30:29,788 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 37 states. [2018-02-02 18:30:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:30,406 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-02-02 18:30:30,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-02-02 18:30:30,407 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 172 [2018-02-02 18:30:30,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:30,408 INFO L225 Difference]: With dead ends: 183 [2018-02-02 18:30:30,408 INFO L226 Difference]: Without dead ends: 183 [2018-02-02 18:30:30,408 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1788, Invalid=3042, Unknown=0, NotChecked=0, Total=4830 [2018-02-02 18:30:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-02-02 18:30:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-02-02 18:30:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-02-02 18:30:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-02-02 18:30:30,411 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 172 [2018-02-02 18:30:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:30,411 INFO L432 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-02-02 18:30:30,411 INFO L433 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-02-02 18:30:30,411 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-02-02 18:30:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-02-02 18:30:30,412 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:30,412 INFO L351 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:30,412 INFO L371 AbstractCegarLoop]: === Iteration 39 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:30,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1375254724, now seen corresponding path program 34 times [2018-02-02 18:30:30,413 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:30,413 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:30,413 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:30,413 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:30,413 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:30,422 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:30,875 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:30,875 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 [2018-02-02 18:30:30,880 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:30:30,905 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:30:30,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:30,907 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:31,288 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:31,288 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 72 [2018-02-02 18:30:31,288 INFO L409 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-02-02 18:30:31,288 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-02-02 18:30:31,289 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=3924, Unknown=0, NotChecked=0, Total=5256 [2018-02-02 18:30:31,289 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 73 states. [2018-02-02 18:30:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:32,401 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2018-02-02 18:30:32,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-02-02 18:30:32,401 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 177 [2018-02-02 18:30:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:32,402 INFO L225 Difference]: With dead ends: 188 [2018-02-02 18:30:32,402 INFO L226 Difference]: Without dead ends: 188 [2018-02-02 18:30:32,402 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1332, Invalid=3924, Unknown=0, NotChecked=0, Total=5256 [2018-02-02 18:30:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-02-02 18:30:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-02-02 18:30:32,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-02-02 18:30:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-02-02 18:30:32,405 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 177 [2018-02-02 18:30:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:32,405 INFO L432 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-02-02 18:30:32,405 INFO L433 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-02-02 18:30:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-02-02 18:30:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-02-02 18:30:32,406 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:32,406 INFO L351 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:32,407 INFO L371 AbstractCegarLoop]: === Iteration 40 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1888573001, now seen corresponding path program 35 times [2018-02-02 18:30:32,407 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:32,407 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:32,407 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:32,407 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:32,408 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:32,414 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:32,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:32,849 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:32,849 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 [2018-02-02 18:30:32,853 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:30:33,058 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-02-02 18:30:33,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:33,060 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:33,545 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:33,545 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2018-02-02 18:30:33,546 INFO L409 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-02-02 18:30:33,546 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-02-02 18:30:33,546 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-02-02 18:30:33,546 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 74 states. [2018-02-02 18:30:35,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:35,115 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-02-02 18:30:35,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-02-02 18:30:35,115 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-02-02 18:30:35,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:35,116 INFO L225 Difference]: With dead ends: 193 [2018-02-02 18:30:35,116 INFO L226 Difference]: Without dead ends: 193 [2018-02-02 18:30:35,116 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1443, Invalid=4107, Unknown=0, NotChecked=0, Total=5550 [2018-02-02 18:30:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-02-02 18:30:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-02-02 18:30:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-02-02 18:30:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-02-02 18:30:35,118 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 182 [2018-02-02 18:30:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:35,118 INFO L432 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-02-02 18:30:35,118 INFO L433 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-02-02 18:30:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-02-02 18:30:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-02-02 18:30:35,118 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:35,119 INFO L351 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:35,119 INFO L371 AbstractCegarLoop]: === Iteration 41 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:35,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2093442020, now seen corresponding path program 36 times [2018-02-02 18:30:35,119 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:35,119 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:35,119 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:35,119 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:35,119 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:35,124 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:35,517 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:35,517 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 [2018-02-02 18:30:35,521 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:30:35,614 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-02-02 18:30:35,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:35,617 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:35,748 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:35,748 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 44 [2018-02-02 18:30:35,749 INFO L409 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-02-02 18:30:35,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-02-02 18:30:35,749 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1244, Unknown=0, NotChecked=0, Total=1980 [2018-02-02 18:30:35,749 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 45 states. [2018-02-02 18:30:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:36,512 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-02-02 18:30:36,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-02-02 18:30:36,512 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 187 [2018-02-02 18:30:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:36,513 INFO L225 Difference]: With dead ends: 198 [2018-02-02 18:30:36,513 INFO L226 Difference]: Without dead ends: 198 [2018-02-02 18:30:36,513 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2205, Invalid=4275, Unknown=0, NotChecked=0, Total=6480 [2018-02-02 18:30:36,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-02-02 18:30:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-02-02 18:30:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-02-02 18:30:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-02-02 18:30:36,515 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 187 [2018-02-02 18:30:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:36,515 INFO L432 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-02-02 18:30:36,515 INFO L433 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-02-02 18:30:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-02-02 18:30:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-02-02 18:30:36,515 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:36,516 INFO L351 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:36,516 INFO L371 AbstractCegarLoop]: === Iteration 42 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:36,516 INFO L82 PathProgramCache]: Analyzing trace with hash 640639191, now seen corresponding path program 37 times [2018-02-02 18:30:36,516 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:36,516 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:36,516 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:36,516 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:36,516 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:36,521 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:36,956 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:36,956 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 [2018-02-02 18:30:36,960 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:36,980 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:37,369 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:37,370 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 78 [2018-02-02 18:30:37,370 INFO L409 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-02-02 18:30:37,370 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-02-02 18:30:37,370 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1599, Invalid=4563, Unknown=0, NotChecked=0, Total=6162 [2018-02-02 18:30:37,371 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 79 states. [2018-02-02 18:30:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:39,019 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-02-02 18:30:39,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-02-02 18:30:39,020 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 192 [2018-02-02 18:30:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:39,020 INFO L225 Difference]: With dead ends: 203 [2018-02-02 18:30:39,021 INFO L226 Difference]: Without dead ends: 203 [2018-02-02 18:30:39,021 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1599, Invalid=4563, Unknown=0, NotChecked=0, Total=6162 [2018-02-02 18:30:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-02-02 18:30:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-02-02 18:30:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-02-02 18:30:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-02-02 18:30:39,024 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 192 [2018-02-02 18:30:39,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:39,024 INFO L432 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-02-02 18:30:39,024 INFO L433 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-02-02 18:30:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-02-02 18:30:39,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-02-02 18:30:39,025 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:39,025 INFO L351 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:39,025 INFO L371 AbstractCegarLoop]: === Iteration 43 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:39,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1578280708, now seen corresponding path program 38 times [2018-02-02 18:30:39,025 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:39,025 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:39,026 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:39,026 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:39,026 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:39,034 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:39,441 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:39,441 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 [2018-02-02 18:30:39,447 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:30:39,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:30:39,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:39,467 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:39,910 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:39,911 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 80 [2018-02-02 18:30:39,911 INFO L409 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-02-02 18:30:39,911 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-02-02 18:30:39,911 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1640, Invalid=4840, Unknown=0, NotChecked=0, Total=6480 [2018-02-02 18:30:39,911 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 81 states. [2018-02-02 18:30:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:40,990 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-02-02 18:30:40,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-02-02 18:30:40,990 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 197 [2018-02-02 18:30:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:40,990 INFO L225 Difference]: With dead ends: 208 [2018-02-02 18:30:40,990 INFO L226 Difference]: Without dead ends: 208 [2018-02-02 18:30:40,991 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1640, Invalid=4840, Unknown=0, NotChecked=0, Total=6480 [2018-02-02 18:30:40,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-02-02 18:30:40,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-02-02 18:30:40,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-02-02 18:30:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-02-02 18:30:40,993 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 197 [2018-02-02 18:30:40,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:40,993 INFO L432 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-02-02 18:30:40,993 INFO L433 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-02-02 18:30:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-02-02 18:30:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-02-02 18:30:40,994 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:40,994 INFO L351 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:40,994 INFO L371 AbstractCegarLoop]: === Iteration 44 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1699590135, now seen corresponding path program 39 times [2018-02-02 18:30:40,995 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:40,995 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:40,995 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:40,995 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:40,995 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:41,002 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:41,442 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:41,442 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 [2018-02-02 18:30:41,447 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:30:41,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-02-02 18:30:41,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:41,651 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:41,724 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:41,724 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-02-02 18:30:41,725 INFO L409 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-02-02 18:30:41,725 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-02-02 18:30:41,725 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-02-02 18:30:41,725 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 43 states. [2018-02-02 18:30:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:42,384 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-02-02 18:30:42,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-02-02 18:30:42,384 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 202 [2018-02-02 18:30:42,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:42,385 INFO L225 Difference]: With dead ends: 213 [2018-02-02 18:30:42,385 INFO L226 Difference]: Without dead ends: 213 [2018-02-02 18:30:42,386 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2463, Invalid=4179, Unknown=0, NotChecked=0, Total=6642 [2018-02-02 18:30:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-02-02 18:30:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-02-02 18:30:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-02-02 18:30:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-02-02 18:30:42,387 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 202 [2018-02-02 18:30:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:42,388 INFO L432 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-02-02 18:30:42,388 INFO L433 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-02-02 18:30:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-02-02 18:30:42,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-02-02 18:30:42,388 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:42,388 INFO L351 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:42,388 INFO L371 AbstractCegarLoop]: === Iteration 45 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:42,389 INFO L82 PathProgramCache]: Analyzing trace with hash 721649116, now seen corresponding path program 40 times [2018-02-02 18:30:42,389 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:42,389 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:42,389 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:42,389 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:42,389 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:42,395 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:42,868 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:42,868 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 [2018-02-02 18:30:42,873 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:30:42,895 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:30:42,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:42,898 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:43,474 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:43,474 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 84 [2018-02-02 18:30:43,474 INFO L409 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-02-02 18:30:43,474 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-02-02 18:30:43,474 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1554, Invalid=5586, Unknown=0, NotChecked=0, Total=7140 [2018-02-02 18:30:43,475 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 85 states. [2018-02-02 18:30:45,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:45,101 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-02-02 18:30:45,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-02-02 18:30:45,101 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 207 [2018-02-02 18:30:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:45,101 INFO L225 Difference]: With dead ends: 218 [2018-02-02 18:30:45,102 INFO L226 Difference]: Without dead ends: 218 [2018-02-02 18:30:45,102 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1554, Invalid=5586, Unknown=0, NotChecked=0, Total=7140 [2018-02-02 18:30:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-02-02 18:30:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-02-02 18:30:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-02-02 18:30:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-02-02 18:30:45,104 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 207 [2018-02-02 18:30:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:45,104 INFO L432 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-02-02 18:30:45,104 INFO L433 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-02-02 18:30:45,104 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-02-02 18:30:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-02-02 18:30:45,105 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:45,105 INFO L351 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:45,105 INFO L371 AbstractCegarLoop]: === Iteration 46 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash 111908631, now seen corresponding path program 41 times [2018-02-02 18:30:45,105 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:45,105 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:45,106 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:45,106 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:45,106 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:45,115 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:45,626 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:45,626 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 [2018-02-02 18:30:45,630 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:30:45,980 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-02-02 18:30:45,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:45,983 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:46,570 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:46,570 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2018-02-02 18:30:46,571 INFO L409 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-02-02 18:30:46,571 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-02-02 18:30:46,572 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-02-02 18:30:46,572 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 86 states. [2018-02-02 18:30:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:48,516 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-02-02 18:30:48,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-02-02 18:30:48,516 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-02-02 18:30:48,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:48,517 INFO L225 Difference]: With dead ends: 223 [2018-02-02 18:30:48,517 INFO L226 Difference]: Without dead ends: 223 [2018-02-02 18:30:48,517 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1935, Invalid=5547, Unknown=0, NotChecked=0, Total=7482 [2018-02-02 18:30:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-02-02 18:30:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-02-02 18:30:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-02-02 18:30:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-02-02 18:30:48,519 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 212 [2018-02-02 18:30:48,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:48,519 INFO L432 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-02-02 18:30:48,519 INFO L433 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-02-02 18:30:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-02-02 18:30:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-02-02 18:30:48,519 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:48,519 INFO L351 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:48,519 INFO L371 AbstractCegarLoop]: === Iteration 47 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1104743100, now seen corresponding path program 42 times [2018-02-02 18:30:48,520 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:48,520 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:48,520 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:48,520 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:48,520 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:48,525 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:49,035 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:49,035 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 [2018-02-02 18:30:49,040 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:30:49,172 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-02-02 18:30:49,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:49,175 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:49,260 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:49,260 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 48 [2018-02-02 18:30:49,260 INFO L409 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-02-02 18:30:49,260 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-02-02 18:30:49,260 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=1388, Unknown=0, NotChecked=0, Total=2352 [2018-02-02 18:30:49,261 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 49 states. [2018-02-02 18:30:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:49,997 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2018-02-02 18:30:49,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-02-02 18:30:49,997 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 217 [2018-02-02 18:30:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:49,998 INFO L225 Difference]: With dead ends: 228 [2018-02-02 18:30:49,998 INFO L226 Difference]: Without dead ends: 228 [2018-02-02 18:30:49,999 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2936, Invalid=5254, Unknown=0, NotChecked=0, Total=8190 [2018-02-02 18:30:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-02-02 18:30:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-02-02 18:30:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-02-02 18:30:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-02-02 18:30:50,002 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 217 [2018-02-02 18:30:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:50,002 INFO L432 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-02-02 18:30:50,002 INFO L433 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-02-02 18:30:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-02-02 18:30:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-02-02 18:30:50,003 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:50,003 INFO L351 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:50,003 INFO L371 AbstractCegarLoop]: === Iteration 48 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1370166839, now seen corresponding path program 43 times [2018-02-02 18:30:50,003 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:50,003 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:50,004 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:50,004 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:50,004 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:50,009 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:50,494 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:50,494 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 [2018-02-02 18:30:50,499 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:50,523 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:51,063 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:51,063 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 90 [2018-02-02 18:30:51,064 INFO L409 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-02-02 18:30:51,064 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-02-02 18:30:51,064 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2115, Invalid=6075, Unknown=0, NotChecked=0, Total=8190 [2018-02-02 18:30:51,064 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 91 states. [2018-02-02 18:30:52,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:52,930 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-02-02 18:30:52,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-02-02 18:30:52,930 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 222 [2018-02-02 18:30:52,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:52,930 INFO L225 Difference]: With dead ends: 233 [2018-02-02 18:30:52,931 INFO L226 Difference]: Without dead ends: 233 [2018-02-02 18:30:52,931 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2115, Invalid=6075, Unknown=0, NotChecked=0, Total=8190 [2018-02-02 18:30:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-02-02 18:30:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-02-02 18:30:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-02-02 18:30:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-02-02 18:30:52,933 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 222 [2018-02-02 18:30:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:52,933 INFO L432 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-02-02 18:30:52,933 INFO L433 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-02-02 18:30:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-02-02 18:30:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-02-02 18:30:52,935 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:52,935 INFO L351 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:52,935 INFO L371 AbstractCegarLoop]: === Iteration 49 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:52,935 INFO L82 PathProgramCache]: Analyzing trace with hash -330563684, now seen corresponding path program 44 times [2018-02-02 18:30:52,935 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:52,935 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:52,936 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:52,936 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:30:52,936 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:52,946 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:53,527 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:53,527 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 [2018-02-02 18:30:53,532 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:30:53,555 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:30:53,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:53,558 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:54,197 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:54,198 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 92 [2018-02-02 18:30:54,198 INFO L409 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-02-02 18:30:54,198 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-02-02 18:30:54,198 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2070, Invalid=6486, Unknown=0, NotChecked=0, Total=8556 [2018-02-02 18:30:54,199 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 93 states. [2018-02-02 18:30:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:56,504 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-02-02 18:30:56,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-02-02 18:30:56,504 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 227 [2018-02-02 18:30:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:56,504 INFO L225 Difference]: With dead ends: 238 [2018-02-02 18:30:56,504 INFO L226 Difference]: Without dead ends: 238 [2018-02-02 18:30:56,505 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3818 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2070, Invalid=6486, Unknown=0, NotChecked=0, Total=8556 [2018-02-02 18:30:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-02-02 18:30:56,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-02-02 18:30:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-02-02 18:30:56,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2018-02-02 18:30:56,506 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 227 [2018-02-02 18:30:56,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:56,507 INFO L432 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2018-02-02 18:30:56,507 INFO L433 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-02-02 18:30:56,507 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2018-02-02 18:30:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-02-02 18:30:56,507 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:56,507 INFO L351 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:56,507 INFO L371 AbstractCegarLoop]: === Iteration 50 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:56,508 INFO L82 PathProgramCache]: Analyzing trace with hash 992882007, now seen corresponding path program 45 times [2018-02-02 18:30:56,508 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:56,508 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:56,508 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:56,508 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:56,508 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:56,514 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:57,130 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:57,130 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 [2018-02-02 18:30:57,136 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:30:57,444 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-02-02 18:30:57,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:57,481 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:57,528 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:57,528 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-02-02 18:30:57,528 INFO L409 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-02-02 18:30:57,528 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-02-02 18:30:57,528 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-02-02 18:30:57,529 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 49 states. [2018-02-02 18:30:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:30:58,328 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-02-02 18:30:58,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-02-02 18:30:58,329 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 232 [2018-02-02 18:30:58,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:30:58,329 INFO L225 Difference]: With dead ends: 243 [2018-02-02 18:30:58,329 INFO L226 Difference]: Without dead ends: 243 [2018-02-02 18:30:58,330 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3246, Invalid=5496, Unknown=0, NotChecked=0, Total=8742 [2018-02-02 18:30:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-02-02 18:30:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-02-02 18:30:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-02-02 18:30:58,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-02-02 18:30:58,332 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 232 [2018-02-02 18:30:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:30:58,332 INFO L432 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-02-02 18:30:58,332 INFO L433 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-02-02 18:30:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-02-02 18:30:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-02-02 18:30:58,334 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:30:58,334 INFO L351 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-02-02 18:30:58,334 INFO L371 AbstractCegarLoop]: === Iteration 51 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:30:58,334 INFO L82 PathProgramCache]: Analyzing trace with hash -222667652, now seen corresponding path program 46 times [2018-02-02 18:30:58,334 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:30:58,334 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:30:58,335 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:58,335 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:30:58,335 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:30:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:30:58,345 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:30:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:58,952 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:30:58,952 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-02-02 18:30:58,959 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:30:58,983 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:30:58,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:30:58,986 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:30:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:30:59,659 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:30:59,659 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 96 [2018-02-02 18:30:59,659 INFO L409 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-02-02 18:30:59,660 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-02-02 18:30:59,660 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=6960, Unknown=0, NotChecked=0, Total=9312 [2018-02-02 18:30:59,660 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 97 states. [2018-02-02 18:31:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:02,264 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2018-02-02 18:31:02,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-02-02 18:31:02,264 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 237 [2018-02-02 18:31:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:02,265 INFO L225 Difference]: With dead ends: 248 [2018-02-02 18:31:02,265 INFO L226 Difference]: Without dead ends: 248 [2018-02-02 18:31:02,265 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2352, Invalid=6960, Unknown=0, NotChecked=0, Total=9312 [2018-02-02 18:31:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-02-02 18:31:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2018-02-02 18:31:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-02-02 18:31:02,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-02-02 18:31:02,268 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 237 [2018-02-02 18:31:02,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:02,268 INFO L432 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-02-02 18:31:02,268 INFO L433 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-02-02 18:31:02,268 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-02-02 18:31:02,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-02-02 18:31:02,269 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:02,270 INFO L351 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:02,270 INFO L371 AbstractCegarLoop]: === Iteration 52 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:31:02,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2053710729, now seen corresponding path program 47 times [2018-02-02 18:31:02,270 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:02,270 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:02,271 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:02,271 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:02,271 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:02,281 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:03,044 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:03,044 INFO L213 onRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-02-02 18:31:03,049 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:31:03,687 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-02-02 18:31:03,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:03,692 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:04,656 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:04,657 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2018-02-02 18:31:04,657 INFO L409 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-02-02 18:31:04,657 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-02-02 18:31:04,657 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-02-02 18:31:04,657 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 98 states. [2018-02-02 18:31:06,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:06,720 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-02-02 18:31:06,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-02-02 18:31:06,720 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-02-02 18:31:06,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:06,721 INFO L225 Difference]: With dead ends: 253 [2018-02-02 18:31:06,721 INFO L226 Difference]: Without dead ends: 253 [2018-02-02 18:31:06,721 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2499, Invalid=7203, Unknown=0, NotChecked=0, Total=9702 [2018-02-02 18:31:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-02-02 18:31:06,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-02-02 18:31:06,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-02-02 18:31:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-02-02 18:31:06,724 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 242 [2018-02-02 18:31:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:06,724 INFO L432 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-02-02 18:31:06,725 INFO L433 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-02-02 18:31:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-02-02 18:31:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-02-02 18:31:06,726 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:06,726 INFO L351 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:06,726 INFO L371 AbstractCegarLoop]: === Iteration 53 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:31:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1073602212, now seen corresponding path program 48 times [2018-02-02 18:31:06,726 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:06,726 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:06,727 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:06,727 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:06,727 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:06,737 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:07,408 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:07,408 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 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 [2018-02-02 18:31:07,414 INFO L109 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-02-02 18:31:07,624 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-02-02 18:31:07,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:07,627 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:08,216 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:08,216 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 68 [2018-02-02 18:31:08,217 INFO L409 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-02-02 18:31:08,217 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-02-02 18:31:08,217 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1432, Invalid=3260, Unknown=0, NotChecked=0, Total=4692 [2018-02-02 18:31:08,218 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 69 states. [2018-02-02 18:31:10,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:10,127 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2018-02-02 18:31:10,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-02-02 18:31:10,127 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 247 [2018-02-02 18:31:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:10,128 INFO L225 Difference]: With dead ends: 258 [2018-02-02 18:31:10,128 INFO L226 Difference]: Without dead ends: 258 [2018-02-02 18:31:10,129 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3855, Invalid=9717, Unknown=0, NotChecked=0, Total=13572 [2018-02-02 18:31:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-02-02 18:31:10,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-02-02 18:31:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-02-02 18:31:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2018-02-02 18:31:10,130 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 247 [2018-02-02 18:31:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:10,131 INFO L432 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2018-02-02 18:31:10,131 INFO L433 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-02-02 18:31:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2018-02-02 18:31:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-02-02 18:31:10,132 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:10,132 INFO L351 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:10,132 INFO L371 AbstractCegarLoop]: === Iteration 54 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:31:10,132 INFO L82 PathProgramCache]: Analyzing trace with hash -523820137, now seen corresponding path program 49 times [2018-02-02 18:31:10,132 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:10,132 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:10,133 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:10,133 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:10,133 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:10,141 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:10,847 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:10,847 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 [2018-02-02 18:31:10,852 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:10,879 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:11,528 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:11,528 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 102 [2018-02-02 18:31:11,528 INFO L409 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-02-02 18:31:11,528 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-02-02 18:31:11,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=7803, Unknown=0, NotChecked=0, Total=10506 [2018-02-02 18:31:11,529 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 103 states. [2018-02-02 18:31:13,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:13,828 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-02-02 18:31:13,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-02-02 18:31:13,828 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 252 [2018-02-02 18:31:13,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:13,829 INFO L225 Difference]: With dead ends: 263 [2018-02-02 18:31:13,829 INFO L226 Difference]: Without dead ends: 263 [2018-02-02 18:31:13,829 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2703, Invalid=7803, Unknown=0, NotChecked=0, Total=10506 [2018-02-02 18:31:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-02-02 18:31:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-02-02 18:31:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-02-02 18:31:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-02-02 18:31:13,831 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 252 [2018-02-02 18:31:13,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:13,831 INFO L432 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-02-02 18:31:13,831 INFO L433 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-02-02 18:31:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-02-02 18:31:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-02-02 18:31:13,832 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:13,832 INFO L351 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:13,832 INFO L371 AbstractCegarLoop]: === Iteration 55 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:31:13,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1098993212, now seen corresponding path program 50 times [2018-02-02 18:31:13,832 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:13,832 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:13,833 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:13,833 INFO L109 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-02-02 18:31:13,833 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:13,839 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:14,540 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:14,540 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 [2018-02-02 18:31:14,545 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-02-02 18:31:14,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-02-02 18:31:14,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:14,587 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:15,308 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:15,308 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 104 [2018-02-02 18:31:15,308 INFO L409 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-02-02 18:31:15,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-02-02 18:31:15,309 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2756, Invalid=8164, Unknown=0, NotChecked=0, Total=10920 [2018-02-02 18:31:15,309 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 105 states. [2018-02-02 18:31:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:17,951 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-02-02 18:31:17,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-02-02 18:31:17,952 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 257 [2018-02-02 18:31:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:17,952 INFO L225 Difference]: With dead ends: 268 [2018-02-02 18:31:17,953 INFO L226 Difference]: Without dead ends: 268 [2018-02-02 18:31:17,953 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5047 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2756, Invalid=8164, Unknown=0, NotChecked=0, Total=10920 [2018-02-02 18:31:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-02-02 18:31:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2018-02-02 18:31:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-02-02 18:31:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-02-02 18:31:17,955 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 257 [2018-02-02 18:31:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:17,955 INFO L432 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-02-02 18:31:17,955 INFO L433 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-02-02 18:31:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-02-02 18:31:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-02-02 18:31:17,956 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:17,956 INFO L351 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:17,956 INFO L371 AbstractCegarLoop]: === Iteration 56 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:31:17,956 INFO L82 PathProgramCache]: Analyzing trace with hash 169935543, now seen corresponding path program 51 times [2018-02-02 18:31:17,956 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:17,956 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:17,956 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:17,956 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:17,957 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:17,964 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:18,710 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:18,710 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 [2018-02-02 18:31:18,715 INFO L109 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-02-02 18:31:19,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-02-02 18:31:19,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:19,179 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:19,230 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:19,230 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-02-02 18:31:19,230 INFO L409 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-02-02 18:31:19,230 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-02-02 18:31:19,231 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-02-02 18:31:19,231 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 55 states. [2018-02-02 18:31:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:20,196 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-02-02 18:31:20,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-02-02 18:31:20,196 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 262 [2018-02-02 18:31:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:20,197 INFO L225 Difference]: With dead ends: 273 [2018-02-02 18:31:20,197 INFO L226 Difference]: Without dead ends: 273 [2018-02-02 18:31:20,197 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4137, Invalid=6993, Unknown=0, NotChecked=0, Total=11130 [2018-02-02 18:31:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-02-02 18:31:20,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-02-02 18:31:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-02-02 18:31:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-02-02 18:31:20,199 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 262 [2018-02-02 18:31:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:20,199 INFO L432 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-02-02 18:31:20,199 INFO L433 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-02-02 18:31:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-02-02 18:31:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-02-02 18:31:20,200 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:20,200 INFO L351 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:20,200 INFO L371 AbstractCegarLoop]: === Iteration 57 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:31:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash -954866916, now seen corresponding path program 52 times [2018-02-02 18:31:20,200 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:20,200 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:20,201 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:20,201 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:20,201 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:20,207 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:20,947 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:20,947 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 [2018-02-02 18:31:20,951 INFO L109 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-02-02 18:31:20,979 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-02-02 18:31:20,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:20,982 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:21,748 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:21,749 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 108 [2018-02-02 18:31:21,749 INFO L409 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-02-02 18:31:21,749 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-02-02 18:31:21,750 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2862, Invalid=8910, Unknown=0, NotChecked=0, Total=11772 [2018-02-02 18:31:21,750 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 109 states. [2018-02-02 18:31:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-02-02 18:31:24,191 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-02-02 18:31:24,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-02-02 18:31:24,191 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 267 [2018-02-02 18:31:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-02-02 18:31:24,192 INFO L225 Difference]: With dead ends: 278 [2018-02-02 18:31:24,192 INFO L226 Difference]: Without dead ends: 278 [2018-02-02 18:31:24,192 INFO L554 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2862, Invalid=8910, Unknown=0, NotChecked=0, Total=11772 [2018-02-02 18:31:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-02-02 18:31:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2018-02-02 18:31:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-02-02 18:31:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-02-02 18:31:24,194 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 267 [2018-02-02 18:31:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-02-02 18:31:24,194 INFO L432 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-02-02 18:31:24,194 INFO L433 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-02-02 18:31:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-02-02 18:31:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-02-02 18:31:24,195 INFO L343 BasicCegarLoop]: Found error trace [2018-02-02 18:31:24,195 INFO L351 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2018-02-02 18:31:24,195 INFO L371 AbstractCegarLoop]: === Iteration 58 === [mainErr0AssertViolation, mainErr2AssertViolation, mainErr4AssertViolation, mainErr3AssertViolation, mainErr1AssertViolation]=== [2018-02-02 18:31:24,195 INFO L82 PathProgramCache]: Analyzing trace with hash -326731305, now seen corresponding path program 53 times [2018-02-02 18:31:24,195 INFO L213 onRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-02-02 18:31:24,195 INFO L67 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-02-02 18:31:24,196 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:24,196 INFO L107 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-02-02 18:31:24,196 INFO L125 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-02-02 18:31:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-02-02 18:31:24,202 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-02-02 18:31:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:25,037 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-02-02 18:31:25,037 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 [2018-02-02 18:31:25,042 INFO L109 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-02-02 18:31:25,961 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-02-02 18:31:25,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-02-02 18:31:25,965 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-02-02 18:31:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-02-02 18:31:26,893 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-02-02 18:31:26,893 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2018-02-02 18:31:26,894 INFO L409 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-02-02 18:31:26,894 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-02-02 18:31:26,894 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-02-02 18:31:26,895 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 110 states. Received shutdown request... [2018-02-02 18:31:27,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-02-02 18:31:27,265 WARN L491 AbstractCegarLoop]: Verification canceled [2018-02-02 18:31:27,268 WARN L185 ceAbstractionStarter]: Timeout [2018-02-02 18:31:27,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.02 06:31:27 BoogieIcfgContainer [2018-02-02 18:31:27,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-02-02 18:31:27,269 INFO L168 Benchmark]: Toolchain (without parser) took 81734.38 ms. Allocated memory was 405.3 MB in the beginning and 1.2 GB in the end (delta: 755.5 MB). Free memory was 360.6 MB in the beginning and 878.9 MB in the end (delta: -518.3 MB). Peak memory consumption was 237.2 MB. Max. memory is 5.3 GB. [2018-02-02 18:31:27,270 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 405.3 MB. Free memory is still 365.9 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-02-02 18:31:27,270 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.59 ms. Allocated memory is still 405.3 MB. Free memory was 360.6 MB in the beginning and 352.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. [2018-02-02 18:31:27,270 INFO L168 Benchmark]: Boogie Preprocessor took 22.03 ms. Allocated memory is still 405.3 MB. Free memory was 352.6 MB in the beginning and 351.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-02-02 18:31:27,270 INFO L168 Benchmark]: RCFGBuilder took 133.04 ms. Allocated memory is still 405.3 MB. Free memory was 351.3 MB in the beginning and 338.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 5.3 GB. [2018-02-02 18:31:27,270 INFO L168 Benchmark]: TraceAbstraction took 81429.69 ms. Allocated memory was 405.3 MB in the beginning and 1.2 GB in the end (delta: 755.5 MB). Free memory was 338.0 MB in the beginning and 878.9 MB in the end (delta: -540.8 MB). Peak memory consumption was 214.6 MB. Max. memory is 5.3 GB. [2018-02-02 18:31:27,271 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 405.3 MB. Free memory is still 365.9 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 146.59 ms. Allocated memory is still 405.3 MB. Free memory was 360.6 MB in the beginning and 352.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 22.03 ms. Allocated memory is still 405.3 MB. Free memory was 352.6 MB in the beginning and 351.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 133.04 ms. Allocated memory is still 405.3 MB. Free memory was 351.3 MB in the beginning and 338.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 5.3 GB. * TraceAbstraction took 81429.69 ms. Allocated memory was 405.3 MB in the beginning and 1.2 GB in the end (delta: 755.5 MB). Free memory was 338.0 MB in the beginning and 878.9 MB in the end (delta: -540.8 MB). Peak memory consumption was 214.6 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 7). Cancelled while BasicCegarLoop was constructing difference of abstraction (278states) and interpolant automaton (currently 9 states, 110 states before enhancement), while ReachableStatesComputation was computing reachable states (37 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was constructing difference of abstraction (278states) and interpolant automaton (currently 9 states, 110 states before enhancement), while ReachableStatesComputation was computing reachable states (37 states constructedinput type IntersectNwa). - 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 (278states) and interpolant automaton (currently 9 states, 110 states before enhancement), while ReachableStatesComputation was computing reachable states (37 states constructedinput type IntersectNwa). - 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 (278states) and interpolant automaton (currently 9 states, 110 states before enhancement), while ReachableStatesComputation was computing reachable states (37 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was constructing difference of abstraction (278states) and interpolant automaton (currently 9 states, 110 states before enhancement), while ReachableStatesComputation was computing reachable states (37 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 5 error locations. TIMEOUT Result, 81.3s OverallTime, 58 OverallIterations, 54 TraceHistogramMax, 44.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1648 SDtfs, 9571 SDslu, 45205 SDs, 0 SdLazy, 164745 SolverSat, 1538 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 29.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9602 GetRequests, 6603 SyntacticMatches, 8 SemanticMatches, 2991 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77473 ImplicationChecksByTransitivity, 30.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=278occurred in iteration=57, 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: 0.1s AutomataMinimizationTime, 57 MinimizatonAttempts, 125 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 29.5s InterpolantComputationTime, 15206 NumberOfCodeBlocks, 15206 NumberOfCodeBlocksAsserted, 852 NumberOfCheckSat, 15093 ConstructedInterpolants, 0 QuantifiedInterpolants, 9758565 SizeOfPredicates, 3 NumberOfNonLiveVariables, 16594 ConjunctsInSsa, 2589 ConjunctsInUnsatCore, 113 InterpolantComputations, 3 PerfectInterpolantSequences, 33/253807 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/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-02-02_18-31-27-278.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-02-02_18-31-27-278.csv Completed graceful shutdown