/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:18:32,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:18:32,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:18:32,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:18:32,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:18:32,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:18:32,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:18:32,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:18:32,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:18:32,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:18:32,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:18:32,653 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:18:32,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:18:32,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:18:32,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:18:32,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:18:32,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:18:32,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:18:32,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:18:32,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:18:32,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:18:32,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:18:32,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:18:32,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:18:32,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:18:32,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:18:32,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:18:32,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:18:32,688 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:18:32,701 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:18:32,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:18:32,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:18:32,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:18:32,703 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:18:32,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:18:32,704 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:18:32,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:18:32,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:18:32,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:18:32,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:18:32,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:18:32,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:18:32,705 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:18:32,705 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:18:32,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:18:32,706 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:18:32,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:18:32,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:18:32,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:18:32,706 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:18:32,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:18:32,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:18:32,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:18:32,707 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:18:32,707 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:18:32,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:18:32,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:18:32,708 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:18:32,708 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:18:32,988 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:18:33,007 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:18:33,010 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:18:33,012 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:18:33,012 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:18:33,013 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2019-11-23 20:18:33,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa5e982c9/32f65136696c4cf0850b984d1dddb9d7/FLAG9700257bc [2019-11-23 20:18:33,605 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:18:33,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_ground-2.i [2019-11-23 20:18:33,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa5e982c9/32f65136696c4cf0850b984d1dddb9d7/FLAG9700257bc [2019-11-23 20:18:33,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa5e982c9/32f65136696c4cf0850b984d1dddb9d7 [2019-11-23 20:18:34,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:18:34,008 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:18:34,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:34,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:18:34,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:18:34,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:33" (1/1) ... [2019-11-23 20:18:34,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f85d8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34, skipping insertion in model container [2019-11-23 20:18:34,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:33" (1/1) ... [2019-11-23 20:18:34,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:18:34,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:18:34,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:34,251 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:18:34,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:34,385 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:18:34,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34 WrapperNode [2019-11-23 20:18:34,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:34,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:34,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:18:34,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:18:34,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... [2019-11-23 20:18:34,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... [2019-11-23 20:18:34,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:34,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:18:34,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:18:34,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:18:34,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... [2019-11-23 20:18:34,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... [2019-11-23 20:18:34,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... [2019-11-23 20:18:34,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... [2019-11-23 20:18:34,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... [2019-11-23 20:18:34,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... [2019-11-23 20:18:34,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... [2019-11-23 20:18:34,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:18:34,470 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:18:34,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:18:34,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:18:34,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:18:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:18:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:18:34,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:18:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:18:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:18:34,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:18:34,901 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:18:34,902 INFO L284 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-23 20:18:34,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:34 BoogieIcfgContainer [2019-11-23 20:18:34,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:18:34,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:18:34,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:18:34,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:18:34,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:18:33" (1/3) ... [2019-11-23 20:18:34,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebc2119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:34, skipping insertion in model container [2019-11-23 20:18:34,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:34" (2/3) ... [2019-11-23 20:18:34,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebc2119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:34, skipping insertion in model container [2019-11-23 20:18:34,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:34" (3/3) ... [2019-11-23 20:18:34,910 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2019-11-23 20:18:34,920 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:18:34,927 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 20:18:34,938 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 20:18:34,959 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:18:34,960 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:18:34,960 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:18:34,960 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:18:34,960 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:18:34,960 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:18:34,960 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:18:34,961 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:18:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-23 20:18:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:18:34,979 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:34,980 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:34,980 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:34,985 INFO L82 PathProgramCache]: Analyzing trace with hash 212109301, now seen corresponding path program 1 times [2019-11-23 20:18:34,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:34,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864858453] [2019-11-23 20:18:34,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:35,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864858453] [2019-11-23 20:18:35,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:35,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:35,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099788537] [2019-11-23 20:18:35,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:35,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:35,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:35,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:35,172 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-11-23 20:18:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:35,262 INFO L93 Difference]: Finished difference Result 110 states and 165 transitions. [2019-11-23 20:18:35,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:35,264 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:18:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:35,275 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:18:35,276 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:18:35,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:18:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 36. [2019-11-23 20:18:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:18:35,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:18:35,321 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 8 [2019-11-23 20:18:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:35,322 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:18:35,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:18:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:18:35,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:35,324 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:35,325 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:35,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:35,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1436007159, now seen corresponding path program 1 times [2019-11-23 20:18:35,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:35,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815229361] [2019-11-23 20:18:35,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:35,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815229361] [2019-11-23 20:18:35,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306212793] [2019-11-23 20:18:35,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:35,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:35,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:35,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:35,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:18:35,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002492979] [2019-11-23 20:18:35,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:18:35,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:35,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:18:35,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:35,475 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 5 states. [2019-11-23 20:18:35,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:35,609 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2019-11-23 20:18:35,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:18:35,611 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-23 20:18:35,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:35,614 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:18:35,615 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:18:35,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:18:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 38. [2019-11-23 20:18:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:18:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2019-11-23 20:18:35,631 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 10 [2019-11-23 20:18:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:35,631 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2019-11-23 20:18:35,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:18:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2019-11-23 20:18:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:18:35,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:35,636 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:35,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:35,840 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:35,841 INFO L82 PathProgramCache]: Analyzing trace with hash 780809593, now seen corresponding path program 2 times [2019-11-23 20:18:35,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:35,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557386625] [2019-11-23 20:18:35,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:18:35,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557386625] [2019-11-23 20:18:35,912 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379513553] [2019-11-23 20:18:35,914 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:35,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:18:35,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:35,967 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:35,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:18:36,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:18:36,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-11-23 20:18:36,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469069262] [2019-11-23 20:18:36,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:18:36,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:18:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:18:36,010 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 4 states. [2019-11-23 20:18:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:36,074 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2019-11-23 20:18:36,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:36,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 20:18:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:36,075 INFO L225 Difference]: With dead ends: 72 [2019-11-23 20:18:36,075 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:18:36,076 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:18:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:18:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 20:18:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:18:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2019-11-23 20:18:36,083 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2019-11-23 20:18:36,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:36,083 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2019-11-23 20:18:36,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:18:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2019-11-23 20:18:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:18:36,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:36,084 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:36,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:36,288 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:36,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:36,289 INFO L82 PathProgramCache]: Analyzing trace with hash 27211895, now seen corresponding path program 1 times [2019-11-23 20:18:36,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:36,290 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525905170] [2019-11-23 20:18:36,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:36,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525905170] [2019-11-23 20:18:36,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:36,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:36,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276439996] [2019-11-23 20:18:36,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:36,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:36,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:36,353 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand 3 states. [2019-11-23 20:18:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:36,384 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2019-11-23 20:18:36,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:36,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:18:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:36,389 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:18:36,389 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:18:36,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:18:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2019-11-23 20:18:36,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:18:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2019-11-23 20:18:36,397 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 25 [2019-11-23 20:18:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:36,397 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2019-11-23 20:18:36,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2019-11-23 20:18:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:18:36,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:36,399 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:36,399 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:36,399 INFO L82 PathProgramCache]: Analyzing trace with hash 676355061, now seen corresponding path program 1 times [2019-11-23 20:18:36,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:36,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735140254] [2019-11-23 20:18:36,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:18:36,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735140254] [2019-11-23 20:18:36,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356961479] [2019-11-23 20:18:36,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:36,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:36,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:36,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:36,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:18:36,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396949852] [2019-11-23 20:18:36,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:18:36,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:18:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:18:36,667 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 10 states. [2019-11-23 20:18:36,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:36,938 INFO L93 Difference]: Finished difference Result 122 states and 151 transitions. [2019-11-23 20:18:36,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:18:36,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-23 20:18:36,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:36,939 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:18:36,940 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:18:36,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:18:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:18:36,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2019-11-23 20:18:36,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:18:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2019-11-23 20:18:36,962 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 27 [2019-11-23 20:18:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:36,962 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2019-11-23 20:18:36,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:18:36,963 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2019-11-23 20:18:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:18:36,964 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:36,965 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:37,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:37,177 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1822113209, now seen corresponding path program 1 times [2019-11-23 20:18:37,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:37,178 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34195339] [2019-11-23 20:18:37,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:18:37,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34195339] [2019-11-23 20:18:37,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637562384] [2019-11-23 20:18:37,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:37,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:18:37,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:18:37,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:37,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 20:18:37,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024786132] [2019-11-23 20:18:37,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:18:37,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:37,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:18:37,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:18:37,421 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 10 states. [2019-11-23 20:18:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:37,876 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2019-11-23 20:18:37,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:18:37,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2019-11-23 20:18:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:37,878 INFO L225 Difference]: With dead ends: 173 [2019-11-23 20:18:37,878 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:18:37,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:18:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:18:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 54. [2019-11-23 20:18:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:18:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2019-11-23 20:18:37,887 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 32 [2019-11-23 20:18:37,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:37,888 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2019-11-23 20:18:37,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:18:37,888 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2019-11-23 20:18:37,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:18:37,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:37,889 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:38,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:38,097 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:38,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:38,097 INFO L82 PathProgramCache]: Analyzing trace with hash -303285431, now seen corresponding path program 2 times [2019-11-23 20:18:38,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:38,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815318278] [2019-11-23 20:18:38,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:18:38,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815318278] [2019-11-23 20:18:38,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593871214] [2019-11-23 20:18:38,215 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:38,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:38,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:38,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:38,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:18:38,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:38,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2019-11-23 20:18:38,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936274169] [2019-11-23 20:18:38,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:18:38,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:38,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:18:38,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:38,350 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand 11 states. [2019-11-23 20:18:38,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:38,771 INFO L93 Difference]: Finished difference Result 215 states and 259 transitions. [2019-11-23 20:18:38,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:18:38,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-11-23 20:18:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:38,783 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:18:38,783 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 20:18:38,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=593, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:18:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 20:18:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 58. [2019-11-23 20:18:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:18:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2019-11-23 20:18:38,795 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 38 [2019-11-23 20:18:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:38,797 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2019-11-23 20:18:38,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:18:38,797 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2019-11-23 20:18:38,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:18:38,799 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:38,801 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:39,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:39,005 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:39,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1033073537, now seen corresponding path program 1 times [2019-11-23 20:18:39,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:39,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513428315] [2019-11-23 20:18:39,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:18:39,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513428315] [2019-11-23 20:18:39,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:39,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:18:39,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354931459] [2019-11-23 20:18:39,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:18:39,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:39,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:18:39,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:18:39,063 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 4 states. [2019-11-23 20:18:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:39,088 INFO L93 Difference]: Finished difference Result 110 states and 136 transitions. [2019-11-23 20:18:39,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:18:39,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-11-23 20:18:39,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:39,090 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:18:39,090 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:18:39,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:39,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:18:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2019-11-23 20:18:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:18:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2019-11-23 20:18:39,100 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 40 [2019-11-23 20:18:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:39,100 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2019-11-23 20:18:39,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:18:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2019-11-23 20:18:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:18:39,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:39,102 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:39,102 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:39,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:39,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1632137011, now seen corresponding path program 1 times [2019-11-23 20:18:39,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:39,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84898270] [2019-11-23 20:18:39,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:39,213 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84898270] [2019-11-23 20:18:39,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144386617] [2019-11-23 20:18:39,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:39,274 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:18:39,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:39,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:39,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:18:39,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928616318] [2019-11-23 20:18:39,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:18:39,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:18:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:18:39,294 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 9 states. [2019-11-23 20:18:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:39,378 INFO L93 Difference]: Finished difference Result 172 states and 204 transitions. [2019-11-23 20:18:39,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:18:39,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2019-11-23 20:18:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:39,380 INFO L225 Difference]: With dead ends: 172 [2019-11-23 20:18:39,380 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:18:39,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:18:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:18:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 66. [2019-11-23 20:18:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:18:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2019-11-23 20:18:39,392 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 43 [2019-11-23 20:18:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:39,393 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2019-11-23 20:18:39,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:18:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2019-11-23 20:18:39,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:18:39,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:39,394 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:39,603 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:39,604 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:39,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:39,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1503522443, now seen corresponding path program 2 times [2019-11-23 20:18:39,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:39,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385469994] [2019-11-23 20:18:39,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:39,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385469994] [2019-11-23 20:18:39,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755118105] [2019-11-23 20:18:39,710 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:39,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:39,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:39,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:18:39,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:39,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:39,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:18:39,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629058843] [2019-11-23 20:18:39,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:18:39,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:39,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:18:39,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:18:39,803 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 10 states. [2019-11-23 20:18:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:39,897 INFO L93 Difference]: Finished difference Result 183 states and 216 transitions. [2019-11-23 20:18:39,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:18:39,897 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-23 20:18:39,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:39,898 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:18:39,899 INFO L226 Difference]: Without dead ends: 132 [2019-11-23 20:18:39,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:18:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-23 20:18:39,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 68. [2019-11-23 20:18:39,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:18:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2019-11-23 20:18:39,916 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 45 [2019-11-23 20:18:39,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:39,919 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2019-11-23 20:18:39,919 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:18:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2019-11-23 20:18:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:18:39,920 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:39,920 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:40,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:40,121 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:40,122 INFO L82 PathProgramCache]: Analyzing trace with hash -194784055, now seen corresponding path program 3 times [2019-11-23 20:18:40,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:40,122 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190821712] [2019-11-23 20:18:40,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:18:40,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190821712] [2019-11-23 20:18:40,240 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699379212] [2019-11-23 20:18:40,240 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:40,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:18:40,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:40,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:40,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:18:40,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:40,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2019-11-23 20:18:40,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068648547] [2019-11-23 20:18:40,350 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:18:40,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:40,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:18:40,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:40,350 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 12 states. [2019-11-23 20:18:40,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:40,504 INFO L93 Difference]: Finished difference Result 233 states and 277 transitions. [2019-11-23 20:18:40,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:18:40,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2019-11-23 20:18:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:40,506 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:18:40,506 INFO L226 Difference]: Without dead ends: 182 [2019-11-23 20:18:40,507 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:18:40,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-23 20:18:40,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 72. [2019-11-23 20:18:40,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:18:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2019-11-23 20:18:40,515 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 47 [2019-11-23 20:18:40,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:40,516 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2019-11-23 20:18:40,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:18:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2019-11-23 20:18:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:18:40,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:40,517 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:40,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:40,721 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:40,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:40,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1043369221, now seen corresponding path program 4 times [2019-11-23 20:18:40,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:40,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416444891] [2019-11-23 20:18:40,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:18:40,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416444891] [2019-11-23 20:18:40,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626431354] [2019-11-23 20:18:40,823 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:40,890 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:40,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:40,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:18:40,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:18:40,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:40,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:18:40,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036206092] [2019-11-23 20:18:40,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:18:40,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:40,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:18:40,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:40,931 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 12 states. [2019-11-23 20:18:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:41,038 INFO L93 Difference]: Finished difference Result 209 states and 244 transitions. [2019-11-23 20:18:41,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:18:41,039 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2019-11-23 20:18:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:41,040 INFO L225 Difference]: With dead ends: 209 [2019-11-23 20:18:41,040 INFO L226 Difference]: Without dead ends: 156 [2019-11-23 20:18:41,041 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:18:41,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-23 20:18:41,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 74. [2019-11-23 20:18:41,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:18:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2019-11-23 20:18:41,049 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 51 [2019-11-23 20:18:41,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:41,049 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2019-11-23 20:18:41,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:18:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2019-11-23 20:18:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:18:41,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:41,051 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:41,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:41,254 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1707848509, now seen corresponding path program 5 times [2019-11-23 20:18:41,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:41,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468644160] [2019-11-23 20:18:41,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:18:41,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468644160] [2019-11-23 20:18:41,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489961237] [2019-11-23 20:18:41,400 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:41,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:18:41,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:41,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:18:41,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:18:41,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:41,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:18:41,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210499842] [2019-11-23 20:18:41,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:18:41,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:18:41,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:18:41,575 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 13 states. [2019-11-23 20:18:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:41,704 INFO L93 Difference]: Finished difference Result 220 states and 256 transitions. [2019-11-23 20:18:41,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:18:41,705 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2019-11-23 20:18:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:41,706 INFO L225 Difference]: With dead ends: 220 [2019-11-23 20:18:41,706 INFO L226 Difference]: Without dead ends: 167 [2019-11-23 20:18:41,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:18:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-23 20:18:41,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 76. [2019-11-23 20:18:41,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:18:41,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2019-11-23 20:18:41,715 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 53 [2019-11-23 20:18:41,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:41,715 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2019-11-23 20:18:41,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:18:41,716 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2019-11-23 20:18:41,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:18:41,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:41,716 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:41,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:41,921 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash 71767297, now seen corresponding path program 6 times [2019-11-23 20:18:41,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:41,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209583418] [2019-11-23 20:18:41,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:18:42,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209583418] [2019-11-23 20:18:42,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069040194] [2019-11-23 20:18:42,037 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:42,105 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:18:42,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:42,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:42,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:18:42,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:42,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-23 20:18:42,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964699436] [2019-11-23 20:18:42,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:18:42,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:18:42,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:18:42,152 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 16 states. [2019-11-23 20:18:42,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:42,344 INFO L93 Difference]: Finished difference Result 304 states and 361 transitions. [2019-11-23 20:18:42,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:18:42,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2019-11-23 20:18:42,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:42,346 INFO L225 Difference]: With dead ends: 304 [2019-11-23 20:18:42,346 INFO L226 Difference]: Without dead ends: 251 [2019-11-23 20:18:42,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:18:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-11-23 20:18:42,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 100. [2019-11-23 20:18:42,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:18:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2019-11-23 20:18:42,357 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 55 [2019-11-23 20:18:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:42,358 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2019-11-23 20:18:42,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:18:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2019-11-23 20:18:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:18:42,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:42,359 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:42,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:42,563 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:42,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1508971185, now seen corresponding path program 1 times [2019-11-23 20:18:42,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:42,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098395010] [2019-11-23 20:18:42,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:18:42,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098395010] [2019-11-23 20:18:42,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901969716] [2019-11-23 20:18:42,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:42,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:18:42,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:18:42,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:42,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:18:42,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779955645] [2019-11-23 20:18:42,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:18:42,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:42,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:18:42,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:42,821 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand 15 states. [2019-11-23 20:18:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:42,968 INFO L93 Difference]: Finished difference Result 286 states and 336 transitions. [2019-11-23 20:18:42,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:18:42,968 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 65 [2019-11-23 20:18:42,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:42,971 INFO L225 Difference]: With dead ends: 286 [2019-11-23 20:18:42,972 INFO L226 Difference]: Without dead ends: 211 [2019-11-23 20:18:42,972 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:18:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-11-23 20:18:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 102. [2019-11-23 20:18:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 20:18:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2019-11-23 20:18:42,983 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 65 [2019-11-23 20:18:42,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:42,983 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2019-11-23 20:18:42,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:18:42,983 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2019-11-23 20:18:42,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:18:42,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:42,984 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:43,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:43,188 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:43,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1507028463, now seen corresponding path program 2 times [2019-11-23 20:18:43,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:43,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816171046] [2019-11-23 20:18:43,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:18:43,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816171046] [2019-11-23 20:18:43,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472632344] [2019-11-23 20:18:43,337 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:43,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:43,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:43,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:18:43,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:18:43,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:43,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:18:43,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348539868] [2019-11-23 20:18:43,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:18:43,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:43,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:18:43,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:18:43,455 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand 16 states. [2019-11-23 20:18:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:43,669 INFO L93 Difference]: Finished difference Result 297 states and 348 transitions. [2019-11-23 20:18:43,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:18:43,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2019-11-23 20:18:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:43,671 INFO L225 Difference]: With dead ends: 297 [2019-11-23 20:18:43,671 INFO L226 Difference]: Without dead ends: 222 [2019-11-23 20:18:43,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:18:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-11-23 20:18:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 104. [2019-11-23 20:18:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:18:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 123 transitions. [2019-11-23 20:18:43,683 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 123 transitions. Word has length 67 [2019-11-23 20:18:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:43,684 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 123 transitions. [2019-11-23 20:18:43,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:18:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 123 transitions. [2019-11-23 20:18:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:18:43,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:43,685 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:43,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:43,897 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:43,898 INFO L82 PathProgramCache]: Analyzing trace with hash -359927379, now seen corresponding path program 3 times [2019-11-23 20:18:43,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:43,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904736855] [2019-11-23 20:18:43,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 20:18:44,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904736855] [2019-11-23 20:18:44,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71993196] [2019-11-23 20:18:44,052 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:44,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:18:44,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:44,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-23 20:18:44,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:44,459 INFO L343 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2019-11-23 20:18:44,460 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 74 [2019-11-23 20:18:44,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:44,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 20:18:44,473 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:18:44,535 INFO L567 ElimStorePlain]: treesize reduction 53, result has 56.6 percent of original size [2019-11-23 20:18:44,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:44,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:44,558 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-23 20:18:44,561 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:51, output treesize:69 [2019-11-23 20:18:44,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:44,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:44,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:44,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:45,061 WARN L192 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2019-11-23 20:18:45,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:45,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:45,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:18:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2019-11-23 20:18:45,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:45,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2019-11-23 20:18:45,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501462972] [2019-11-23 20:18:45,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:18:45,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:45,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:18:45,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:18:45,253 INFO L87 Difference]: Start difference. First operand 104 states and 123 transitions. Second operand 27 states. [2019-11-23 20:18:47,155 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2019-11-23 20:18:47,340 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2019-11-23 20:18:47,512 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2019-11-23 20:18:49,880 WARN L192 SmtUtils]: Spent 1.71 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2019-11-23 20:18:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:50,892 INFO L93 Difference]: Finished difference Result 561 states and 685 transitions. [2019-11-23 20:18:50,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:18:50,892 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2019-11-23 20:18:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:50,895 INFO L225 Difference]: With dead ends: 561 [2019-11-23 20:18:50,895 INFO L226 Difference]: Without dead ends: 486 [2019-11-23 20:18:50,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1363, Invalid=2797, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:18:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2019-11-23 20:18:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 149. [2019-11-23 20:18:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2019-11-23 20:18:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 184 transitions. [2019-11-23 20:18:50,924 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 184 transitions. Word has length 69 [2019-11-23 20:18:50,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:50,925 INFO L462 AbstractCegarLoop]: Abstraction has 149 states and 184 transitions. [2019-11-23 20:18:50,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:18:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 184 transitions. [2019-11-23 20:18:50,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:18:50,926 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:50,926 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:51,129 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:51,130 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:51,131 INFO L82 PathProgramCache]: Analyzing trace with hash -29557331, now seen corresponding path program 4 times [2019-11-23 20:18:51,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:51,132 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194344077] [2019-11-23 20:18:51,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:18:51,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194344077] [2019-11-23 20:18:51,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337768762] [2019-11-23 20:18:51,296 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:51,360 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:51,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:51,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:18:51,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:18:51,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:51,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 21 [2019-11-23 20:18:51,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226382133] [2019-11-23 20:18:51,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:18:51,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:51,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:18:51,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:18:51,433 INFO L87 Difference]: Start difference. First operand 149 states and 184 transitions. Second operand 21 states. [2019-11-23 20:18:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:51,720 INFO L93 Difference]: Finished difference Result 545 states and 676 transitions. [2019-11-23 20:18:51,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:18:51,721 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2019-11-23 20:18:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:51,723 INFO L225 Difference]: With dead ends: 545 [2019-11-23 20:18:51,723 INFO L226 Difference]: Without dead ends: 427 [2019-11-23 20:18:51,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:18:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2019-11-23 20:18:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 214. [2019-11-23 20:18:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-11-23 20:18:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 269 transitions. [2019-11-23 20:18:51,775 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 269 transitions. Word has length 74 [2019-11-23 20:18:51,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:51,776 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 269 transitions. [2019-11-23 20:18:51,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:18:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 269 transitions. [2019-11-23 20:18:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:18:51,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:51,777 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:51,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:51,989 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:51,990 INFO L82 PathProgramCache]: Analyzing trace with hash 469606781, now seen corresponding path program 5 times [2019-11-23 20:18:51,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:51,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290873532] [2019-11-23 20:18:51,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-11-23 20:18:52,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290873532] [2019-11-23 20:18:52,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000810407] [2019-11-23 20:18:52,209 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:52,527 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-23 20:18:52,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:52,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:18:52,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-23 20:18:52,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:52,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:18:52,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111198145] [2019-11-23 20:18:52,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:18:52,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:52,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:18:52,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:52,625 INFO L87 Difference]: Start difference. First operand 214 states and 269 transitions. Second operand 24 states. [2019-11-23 20:18:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:54,386 INFO L93 Difference]: Finished difference Result 869 states and 1025 transitions. [2019-11-23 20:18:54,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-11-23 20:18:54,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 84 [2019-11-23 20:18:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:54,390 INFO L225 Difference]: With dead ends: 869 [2019-11-23 20:18:54,390 INFO L226 Difference]: Without dead ends: 688 [2019-11-23 20:18:54,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1474, Invalid=4846, Unknown=0, NotChecked=0, Total=6320 [2019-11-23 20:18:54,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2019-11-23 20:18:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 186. [2019-11-23 20:18:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 20:18:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 224 transitions. [2019-11-23 20:18:54,422 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 224 transitions. Word has length 84 [2019-11-23 20:18:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:54,422 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 224 transitions. [2019-11-23 20:18:54,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:18:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 224 transitions. [2019-11-23 20:18:54,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 20:18:54,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:54,423 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:54,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:54,628 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:54,628 INFO L82 PathProgramCache]: Analyzing trace with hash -58497237, now seen corresponding path program 1 times [2019-11-23 20:18:54,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:54,628 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534932249] [2019-11-23 20:18:54,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-11-23 20:18:54,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534932249] [2019-11-23 20:18:54,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979660210] [2019-11-23 20:18:54,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:54,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:18:54,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:18:55,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:55,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19] total 24 [2019-11-23 20:18:55,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416507768] [2019-11-23 20:18:55,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:18:55,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:55,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:18:55,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:18:55,066 INFO L87 Difference]: Start difference. First operand 186 states and 224 transitions. Second operand 24 states. [2019-11-23 20:18:57,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:57,978 INFO L93 Difference]: Finished difference Result 750 states and 862 transitions. [2019-11-23 20:18:57,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2019-11-23 20:18:57,979 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2019-11-23 20:18:57,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:57,983 INFO L225 Difference]: With dead ends: 750 [2019-11-23 20:18:57,983 INFO L226 Difference]: Without dead ends: 547 [2019-11-23 20:18:57,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5549 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3520, Invalid=12482, Unknown=0, NotChecked=0, Total=16002 [2019-11-23 20:18:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2019-11-23 20:18:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 196. [2019-11-23 20:18:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-23 20:18:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 235 transitions. [2019-11-23 20:18:58,024 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 235 transitions. Word has length 90 [2019-11-23 20:18:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:58,024 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 235 transitions. [2019-11-23 20:18:58,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:18:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 235 transitions. [2019-11-23 20:18:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-23 20:18:58,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:58,026 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:58,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,229 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:58,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1455472791, now seen corresponding path program 6 times [2019-11-23 20:18:58,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:58,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642470298] [2019-11-23 20:18:58,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 20:18:58,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642470298] [2019-11-23 20:18:58,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75836487] [2019-11-23 20:18:58,422 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,567 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:18:58,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:58,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:58,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:58,660 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2019-11-23 20:18:58,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:58,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7] total 25 [2019-11-23 20:18:58,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829708115] [2019-11-23 20:18:58,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:18:58,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:18:58,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:18:58,663 INFO L87 Difference]: Start difference. First operand 196 states and 235 transitions. Second operand 25 states. [2019-11-23 20:18:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:59,065 INFO L93 Difference]: Finished difference Result 723 states and 875 transitions. [2019-11-23 20:18:59,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:18:59,066 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 92 [2019-11-23 20:18:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:59,068 INFO L225 Difference]: With dead ends: 723 [2019-11-23 20:18:59,068 INFO L226 Difference]: Without dead ends: 564 [2019-11-23 20:18:59,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=535, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:18:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-23 20:18:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 256. [2019-11-23 20:18:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-11-23 20:18:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 311 transitions. [2019-11-23 20:18:59,103 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 311 transitions. Word has length 92 [2019-11-23 20:18:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:59,103 INFO L462 AbstractCegarLoop]: Abstraction has 256 states and 311 transitions. [2019-11-23 20:18:59,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:18:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 311 transitions. [2019-11-23 20:18:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 20:18:59,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:59,105 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:59,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,309 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:59,309 INFO L82 PathProgramCache]: Analyzing trace with hash -679315865, now seen corresponding path program 7 times [2019-11-23 20:18:59,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:59,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278818674] [2019-11-23 20:18:59,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:18:59,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278818674] [2019-11-23 20:18:59,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223464304] [2019-11-23 20:18:59,559 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:18:59,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:18:59,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:59,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:18:59,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789920154] [2019-11-23 20:18:59,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:18:59,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:59,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:18:59,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:18:59,662 INFO L87 Difference]: Start difference. First operand 256 states and 311 transitions. Second operand 22 states. [2019-11-23 20:18:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:59,952 INFO L93 Difference]: Finished difference Result 723 states and 871 transitions. [2019-11-23 20:18:59,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:18:59,955 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2019-11-23 20:18:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:59,957 INFO L225 Difference]: With dead ends: 723 [2019-11-23 20:18:59,958 INFO L226 Difference]: Without dead ends: 506 [2019-11-23 20:18:59,958 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:18:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2019-11-23 20:19:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 258. [2019-11-23 20:19:00,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2019-11-23 20:19:00,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 313 transitions. [2019-11-23 20:19:00,007 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 313 transitions. Word has length 102 [2019-11-23 20:19:00,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:00,008 INFO L462 AbstractCegarLoop]: Abstraction has 258 states and 313 transitions. [2019-11-23 20:19:00,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:19:00,008 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 313 transitions. [2019-11-23 20:19:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 20:19:00,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:00,009 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:00,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,212 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:00,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:00,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1821305321, now seen corresponding path program 8 times [2019-11-23 20:19:00,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:00,213 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090572070] [2019-11-23 20:19:00,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:19:00,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090572070] [2019-11-23 20:19:00,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579305995] [2019-11-23 20:19:00,483 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,576 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:00,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:00,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:19:00,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:19:00,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:00,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:19:00,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553574845] [2019-11-23 20:19:00,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:19:00,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:00,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:19:00,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:19:00,598 INFO L87 Difference]: Start difference. First operand 258 states and 313 transitions. Second operand 23 states. [2019-11-23 20:19:00,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:00,897 INFO L93 Difference]: Finished difference Result 738 states and 888 transitions. [2019-11-23 20:19:00,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:19:00,898 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 104 [2019-11-23 20:19:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:00,900 INFO L225 Difference]: With dead ends: 738 [2019-11-23 20:19:00,900 INFO L226 Difference]: Without dead ends: 521 [2019-11-23 20:19:00,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:19:00,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2019-11-23 20:19:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 260. [2019-11-23 20:19:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-11-23 20:19:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2019-11-23 20:19:00,939 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 104 [2019-11-23 20:19:00,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:00,940 INFO L462 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2019-11-23 20:19:00,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:19:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2019-11-23 20:19:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-23 20:19:00,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:00,941 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:01,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:01,146 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:01,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:01,146 INFO L82 PathProgramCache]: Analyzing trace with hash -263420693, now seen corresponding path program 9 times [2019-11-23 20:19:01,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:01,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012256261] [2019-11-23 20:19:01,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:19:01,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012256261] [2019-11-23 20:19:01,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395728677] [2019-11-23 20:19:01,455 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:01,551 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:19:01,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:01,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-23 20:19:01,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:01,733 INFO L343 Elim1Store]: treesize reduction 46, result has 57.0 percent of original size [2019-11-23 20:19:01,734 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 77 [2019-11-23 20:19:01,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 20:19:01,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:01,736 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:19:01,790 INFO L567 ElimStorePlain]: treesize reduction 25, result has 78.1 percent of original size [2019-11-23 20:19:01,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:01,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:01,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:01,794 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-23 20:19:01,794 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:89 [2019-11-23 20:19:01,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:01,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:01,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:01,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:01,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:01,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:02,087 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2019-11-23 20:19:02,827 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:19:02,829 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:19:02,830 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:19:02,833 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:19:02,861 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:19:02,862 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 52 treesize of output 114 [2019-11-23 20:19:02,863 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:19:02,929 INFO L567 ElimStorePlain]: treesize reduction 28, result has 76.9 percent of original size [2019-11-23 20:19:02,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:02,932 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2019-11-23 20:19:02,933 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:80, output treesize:81 [2019-11-23 20:19:03,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 51 proven. 26 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-11-23 20:19:03,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:03,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 40 [2019-11-23 20:19:03,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597822883] [2019-11-23 20:19:03,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:19:03,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:03,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:19:03,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=1205, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:19:03,181 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand 40 states. [2019-11-23 20:19:04,919 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2019-11-23 20:19:07,318 WARN L192 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2019-11-23 20:19:08,095 WARN L192 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 95 [2019-11-23 20:19:10,474 WARN L192 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2019-11-23 20:19:10,986 WARN L192 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2019-11-23 20:19:11,350 WARN L192 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-11-23 20:19:11,813 WARN L192 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2019-11-23 20:19:14,206 WARN L192 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-11-23 20:19:18,635 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2019-11-23 20:19:20,070 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2019-11-23 20:19:20,532 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 75 [2019-11-23 20:19:20,724 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 73 [2019-11-23 20:19:23,027 WARN L192 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2019-11-23 20:19:23,594 WARN L192 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-11-23 20:19:23,793 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2019-11-23 20:19:26,142 WARN L192 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2019-11-23 20:19:26,311 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2019-11-23 20:19:26,622 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2019-11-23 20:19:27,233 WARN L192 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 106 [2019-11-23 20:19:27,472 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2019-11-23 20:19:30,241 WARN L192 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2019-11-23 20:19:30,451 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2019-11-23 20:19:30,637 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 76 [2019-11-23 20:19:35,176 WARN L192 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2019-11-23 20:19:38,008 WARN L192 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 106 [2019-11-23 20:19:38,210 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2019-11-23 20:19:38,887 WARN L192 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 110 [2019-11-23 20:19:39,442 WARN L192 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2019-11-23 20:19:40,828 WARN L192 SmtUtils]: Spent 666.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2019-11-23 20:19:44,461 WARN L192 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2019-11-23 20:19:45,226 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 85 [2019-11-23 20:19:45,732 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2019-11-23 20:19:46,055 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2019-11-23 20:19:46,357 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2019-11-23 20:19:46,591 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 85 [2019-11-23 20:19:47,342 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2019-11-23 20:19:47,861 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 89 [2019-11-23 20:19:55,927 WARN L192 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2019-11-23 20:19:56,816 WARN L192 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2019-11-23 20:19:57,341 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 105 [2019-11-23 20:19:57,537 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2019-11-23 20:19:57,786 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 75 [2019-11-23 20:20:00,179 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2019-11-23 20:20:04,489 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2019-11-23 20:20:04,722 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 80 [2019-11-23 20:20:07,321 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-11-23 20:20:07,924 WARN L192 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 103 [2019-11-23 20:20:08,567 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 78 [2019-11-23 20:20:08,893 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2019-11-23 20:20:10,146 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 77 [2019-11-23 20:20:13,164 WARN L192 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 88 DAG size of output: 88