/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/reducercommutativity/sum10-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:29:41,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:29:41,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:29:41,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:29:41,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:29:41,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:29:41,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:29:41,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:29:41,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:29:41,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:29:41,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:29:41,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:29:41,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:29:41,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:29:41,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:29:41,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:29:41,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:29:41,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:29:41,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:29:41,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:29:41,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:29:41,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:29:41,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:29:41,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:29:41,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 22:29:41,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 22:29:41,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 22:29:41,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 22:29:41,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 22:29:41,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 22:29:41,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:29:41,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:29:41,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:29:41,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:29:41,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:29:41,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:29:41,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:29:41,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:29:41,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:29:41,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:29:41,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:29:41,500 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 22:29:41,513 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:29:41,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:29:41,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:29:41,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:29:41,515 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:29:41,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:29:41,516 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:29:41,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:29:41,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:29:41,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:29:41,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:29:41,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:29:41,517 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:29:41,517 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:29:41,517 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:29:41,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:29:41,518 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:29:41,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:29:41,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:29:41,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:29:41,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:29:41,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:29:41,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:29:41,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:29:41,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:29:41,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:29:41,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:29:41,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:29:41,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:29:41,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:29:41,805 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:29:41,820 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:29:41,824 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:29:41,825 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:29:41,826 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:29:41,827 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sum10-1.i [2019-11-23 22:29:41,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4b04b21/ef4f2397eecd433cacbba689a26e30f4/FLAG71118d617 [2019-11-23 22:29:42,333 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:29:42,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sum10-1.i [2019-11-23 22:29:42,345 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4b04b21/ef4f2397eecd433cacbba689a26e30f4/FLAG71118d617 [2019-11-23 22:29:42,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4b04b21/ef4f2397eecd433cacbba689a26e30f4 [2019-11-23 22:29:42,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:29:42,726 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:29:42,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:42,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:29:42,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:29:42,732 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:42" (1/1) ... [2019-11-23 22:29:42,735 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@748d0db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:42, skipping insertion in model container [2019-11-23 22:29:42,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:29:42" (1/1) ... [2019-11-23 22:29:42,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:29:42,761 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:29:42,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:42,987 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:29:43,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:29:43,029 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:29:43,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43 WrapperNode [2019-11-23 22:29:43,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:29:43,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:43,031 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:29:43,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:29:43,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (1/1) ... [2019-11-23 22:29:43,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (1/1) ... [2019-11-23 22:29:43,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:29:43,148 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:29:43,148 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:29:43,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:29:43,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (1/1) ... [2019-11-23 22:29:43,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (1/1) ... [2019-11-23 22:29:43,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (1/1) ... [2019-11-23 22:29:43,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (1/1) ... [2019-11-23 22:29:43,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (1/1) ... [2019-11-23 22:29:43,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (1/1) ... [2019-11-23 22:29:43,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (1/1) ... [2019-11-23 22:29:43,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:29:43,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:29:43,193 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:29:43,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:29:43,194 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (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 22:29:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:29:43,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:29:43,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:29:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:29:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:29:43,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:29:43,568 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:29:43,568 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:29:43,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:43 BoogieIcfgContainer [2019-11-23 22:29:43,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:29:43,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:29:43,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:29:43,575 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:29:43,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:29:42" (1/3) ... [2019-11-23 22:29:43,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ee29ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:43, skipping insertion in model container [2019-11-23 22:29:43,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:29:43" (2/3) ... [2019-11-23 22:29:43,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47ee29ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:29:43, skipping insertion in model container [2019-11-23 22:29:43,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:29:43" (3/3) ... [2019-11-23 22:29:43,579 INFO L109 eAbstractionObserver]: Analyzing ICFG sum10-1.i [2019-11-23 22:29:43,598 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:29:43,603 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:29:43,613 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:29:43,635 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:29:43,635 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:29:43,635 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:29:43,635 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:29:43,635 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:29:43,636 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:29:43,636 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:29:43,636 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:29:43,649 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 22:29:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:29:43,655 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:43,656 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:43,656 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:43,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:43,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 22:29:43,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:43,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395911529] [2019-11-23 22:29:43,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:43,834 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 22:29:43,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395911529] [2019-11-23 22:29:43,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:43,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:43,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532522177] [2019-11-23 22:29:43,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:43,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:43,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:43,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:43,855 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 22:29:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:43,892 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 22:29:43,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:43,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:29:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:43,907 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:29:43,907 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:29:43,911 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 22:29:43,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:29:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:29:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:29:43,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:29:43,942 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:29:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:43,942 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:29:43,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:29:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:29:43,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:43,944 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:43,944 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:43,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 22:29:43,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:43,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470882219] [2019-11-23 22:29:43,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:29:44,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470882219] [2019-11-23 22:29:44,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:44,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:44,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760423898] [2019-11-23 22:29:44,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:44,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:44,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:44,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:44,006 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 22:29:44,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:44,074 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:29:44,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:44,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:29:44,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:44,076 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:29:44,076 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 22:29:44,077 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 22:29:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 22:29:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 22:29:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:29:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:29:44,084 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 22:29:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:44,085 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:29:44,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:29:44,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:29:44,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:44,086 INFO L410 BasicCegarLoop]: trace histogram [1, 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 22:29:44,087 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:44,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:44,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 22:29:44,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:44,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148959558] [2019-11-23 22:29:44,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:44,183 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 22:29:44,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148959558] [2019-11-23 22:29:44,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:29:44,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:29:44,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981522517] [2019-11-23 22:29:44,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:29:44,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:29:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:29:44,186 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 22:29:44,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:44,206 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 22:29:44,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:29:44,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 22:29:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:44,208 INFO L225 Difference]: With dead ends: 38 [2019-11-23 22:29:44,208 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:29:44,209 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 22:29:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:29:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 22:29:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:29:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 22:29:44,215 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 22:29:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:44,216 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 22:29:44,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:29:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 22:29:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 22:29:44,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:44,217 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 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 22:29:44,218 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:44,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 22:29:44,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:44,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798377451] [2019-11-23 22:29:44,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:44,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798377451] [2019-11-23 22:29:44,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617497837] [2019-11-23 22:29:44,306 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 22:29:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:44,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:44,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:44,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:44,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:29:44,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039493897] [2019-11-23 22:29:44,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:29:44,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:44,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:29:44,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:29:44,419 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 22:29:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:44,452 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 22:29:44,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:29:44,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 22:29:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:44,454 INFO L225 Difference]: With dead ends: 54 [2019-11-23 22:29:44,454 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:29:44,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 22:29:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:29:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:29:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:29:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 22:29:44,461 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 22:29:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:44,461 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 22:29:44,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:29:44,461 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 22:29:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:29:44,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:44,463 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, 1, 1] [2019-11-23 22:29:44,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:44,672 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:44,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 22:29:44,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:44,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537491623] [2019-11-23 22:29:44,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:29:44,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537491623] [2019-11-23 22:29:44,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646268279] [2019-11-23 22:29:44,778 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 22:29:44,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:44,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:44,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:44,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:44,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:44,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 22:29:44,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916925742] [2019-11-23 22:29:44,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:29:44,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:44,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:29:44,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:29:44,908 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 22:29:44,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:44,977 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 22:29:44,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:29:44,980 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 22:29:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:44,981 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:29:44,981 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 22:29:44,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 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 22:29:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 22:29:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 22:29:44,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:29:44,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 22:29:44,997 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 22:29:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:44,997 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 22:29:44,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:29:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 22:29:44,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:29:44,998 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:44,998 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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 22:29:45,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:45,205 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:45,205 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 22:29:45,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:45,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697786564] [2019-11-23 22:29:45,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 22:29:45,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697786564] [2019-11-23 22:29:45,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282572438] [2019-11-23 22:29:45,306 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 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 22:29:45,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:29:45,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:45,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:29:45,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 22:29:45,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:45,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:29:45,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441878662] [2019-11-23 22:29:45,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:29:45,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:29:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:45,411 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 22:29:45,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:45,517 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 22:29:45,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:29:45,517 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 22:29:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:45,518 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:29:45,518 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 22:29:45,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:29:45,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 22:29:45,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 22:29:45,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:29:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 22:29:45,534 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 22:29:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:45,534 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 22:29:45,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:29:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 22:29:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:29:45,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:45,537 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 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 22:29:45,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:45,741 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 22:29:45,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:45,742 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88173321] [2019-11-23 22:29:45,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:45,852 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:29:45,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88173321] [2019-11-23 22:29:45,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887737723] [2019-11-23 22:29:45,853 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 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 22:29:45,898 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:45,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:45,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:29:45,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:29:45,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:45,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 22:29:45,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801529605] [2019-11-23 22:29:45,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:29:45,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:29:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:45,931 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 22:29:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:46,062 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 22:29:46,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:46,064 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 22:29:46,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:46,064 INFO L225 Difference]: With dead ends: 85 [2019-11-23 22:29:46,065 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 22:29:46,066 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:29:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 22:29:46,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 22:29:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:29:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 22:29:46,077 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 22:29:46,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:46,077 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 22:29:46,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:29:46,077 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 22:29:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:29:46,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:46,082 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:46,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:46,283 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:46,284 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 22:29:46,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:46,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078726652] [2019-11-23 22:29:46,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:46,440 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 22:29:46,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078726652] [2019-11-23 22:29:46,441 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058472571] [2019-11-23 22:29:46,441 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 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 22:29:46,522 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:29:46,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:46,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:46,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 22:29:46,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:46,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 22:29:46,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066442921] [2019-11-23 22:29:46,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:46,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:46,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:46,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:46,598 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 22:29:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:46,724 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 22:29:46,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:29:46,725 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 22:29:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:46,726 INFO L225 Difference]: With dead ends: 99 [2019-11-23 22:29:46,726 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:29:46,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:46,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:29:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 22:29:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 22:29:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 22:29:46,745 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 22:29:46,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:46,746 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 22:29:46,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 22:29:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 22:29:46,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:46,747 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:46,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:46,951 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 22:29:46,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:46,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901065069] [2019-11-23 22:29:46,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 22:29:47,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901065069] [2019-11-23 22:29:47,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200749147] [2019-11-23 22:29:47,088 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 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 22:29:47,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 22:29:47,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:47,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:29:47,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 22:29:47,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:47,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 22:29:47,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221747815] [2019-11-23 22:29:47,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:47,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:47,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:47,213 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 22:29:47,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,279 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 22:29:47,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:29:47,280 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 22:29:47,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,281 INFO L225 Difference]: With dead ends: 107 [2019-11-23 22:29:47,281 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 22:29:47,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 22:29:47,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 22:29:47,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 22:29:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 22:29:47,288 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 22:29:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,288 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 22:29:47,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 22:29:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 22:29:47,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,290 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:47,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:47,494 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 22:29:47,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,495 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593185306] [2019-11-23 22:29:47,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:47,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593185306] [2019-11-23 22:29:47,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262339456] [2019-11-23 22:29:47,590 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 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 22:29:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:47,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:29:47,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:47,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:47,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:29:47,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791634600] [2019-11-23 22:29:47,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:29:47,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:47,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:29:47,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:47,710 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 22:29:47,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:47,749 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 22:29:47,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:47,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 22:29:47,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:47,751 INFO L225 Difference]: With dead ends: 110 [2019-11-23 22:29:47,751 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:29:47,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:29:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 22:29:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 22:29:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 22:29:47,765 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 22:29:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:47,765 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 22:29:47,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:29:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 22:29:47,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 22:29:47,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:47,768 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:47,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:47,973 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 22:29:47,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:47,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256272989] [2019-11-23 22:29:47,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:48,079 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256272989] [2019-11-23 22:29:48,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618515138] [2019-11-23 22:29:48,080 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 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 22:29:48,139 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:48,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:48,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:29:48,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:48,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:48,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:29:48,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160293608] [2019-11-23 22:29:48,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:48,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:48,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:48,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:48,177 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 22:29:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:48,213 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 22:29:48,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:29:48,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 22:29:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:48,223 INFO L225 Difference]: With dead ends: 112 [2019-11-23 22:29:48,223 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:29:48,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 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 22:29:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:29:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 22:29:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 22:29:48,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 22:29:48,232 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 22:29:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:48,233 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 22:29:48,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 22:29:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 22:29:48,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:48,236 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:48,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,440 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:48,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:48,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 22:29:48,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:48,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658992178] [2019-11-23 22:29:48,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 22:29:48,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658992178] [2019-11-23 22:29:48,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833068701] [2019-11-23 22:29:48,572 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 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 22:29:48,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:29:48,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:48,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:29:48,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 22:29:48,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:48,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 22:29:48,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299798576] [2019-11-23 22:29:48,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:29:48,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:48,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:29:48,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:29:48,704 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 22:29:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:48,772 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2019-11-23 22:29:48,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:29:48,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 22:29:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:48,774 INFO L225 Difference]: With dead ends: 116 [2019-11-23 22:29:48,774 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 22:29:48,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:29:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 22:29:48,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-11-23 22:29:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 22:29:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 22:29:48,781 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 22:29:48,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:48,781 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 22:29:48,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:29:48,781 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 22:29:48,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:29:48,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:48,782 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:48,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:48,986 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:48,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:48,986 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 22:29:48,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:48,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552250507] [2019-11-23 22:29:48,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-23 22:29:49,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552250507] [2019-11-23 22:29:49,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460457076] [2019-11-23 22:29:49,063 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 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 22:29:49,120 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:29:49,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:49,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:29:49,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-23 22:29:49,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:49,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-23 22:29:49,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109063272] [2019-11-23 22:29:49,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:49,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:49,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:49,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:49,177 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 12 states. [2019-11-23 22:29:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:49,283 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2019-11-23 22:29:49,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 22:29:49,284 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2019-11-23 22:29:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:49,285 INFO L225 Difference]: With dead ends: 119 [2019-11-23 22:29:49,285 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 22:29:49,288 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 22:29:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2019-11-23 22:29:49,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 22:29:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2019-11-23 22:29:49,301 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 69 [2019-11-23 22:29:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:49,301 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2019-11-23 22:29:49,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:49,302 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2019-11-23 22:29:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 22:29:49,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:49,306 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:49,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:49,507 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:49,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:49,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1996605636, now seen corresponding path program 11 times [2019-11-23 22:29:49,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:49,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294275747] [2019-11-23 22:29:49,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2019-11-23 22:29:49,591 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294275747] [2019-11-23 22:29:49,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206303726] [2019-11-23 22:29:49,592 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 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 22:29:49,994 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 22:29:49,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:49,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:29:50,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2019-11-23 22:29:50,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:50,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-23 22:29:50,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182070886] [2019-11-23 22:29:50,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 22:29:50,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:50,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 22:29:50,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:29:50,101 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 14 states. [2019-11-23 22:29:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:50,240 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2019-11-23 22:29:50,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 22:29:50,240 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2019-11-23 22:29:50,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:50,241 INFO L225 Difference]: With dead ends: 133 [2019-11-23 22:29:50,241 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 22:29:50,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-11-23 22:29:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 22:29:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2019-11-23 22:29:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 22:29:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 22:29:50,247 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 77 [2019-11-23 22:29:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:50,248 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 22:29:50,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 22:29:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 22:29:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 22:29:50,249 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:50,249 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:50,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:50,458 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:50,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:50,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1077761992, now seen corresponding path program 12 times [2019-11-23 22:29:50,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:50,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757171933] [2019-11-23 22:29:50,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-11-23 22:29:50,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757171933] [2019-11-23 22:29:50,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231407387] [2019-11-23 22:29:50,544 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 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 22:29:51,165 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 22:29:51,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:51,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:29:51,170 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2019-11-23 22:29:51,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:51,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2019-11-23 22:29:51,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707793890] [2019-11-23 22:29:51,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:29:51,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:51,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:29:51,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:29:51,283 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 22:29:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:51,528 INFO L93 Difference]: Finished difference Result 148 states and 159 transitions. [2019-11-23 22:29:51,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:29:51,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 22:29:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:51,529 INFO L225 Difference]: With dead ends: 148 [2019-11-23 22:29:51,530 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 22:29:51,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:29:51,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 22:29:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2019-11-23 22:29:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 22:29:51,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2019-11-23 22:29:51,537 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 85 [2019-11-23 22:29:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:51,537 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2019-11-23 22:29:51,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:29:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2019-11-23 22:29:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 22:29:51,539 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:51,539 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:51,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:51,745 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:51,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1835441586, now seen corresponding path program 13 times [2019-11-23 22:29:51,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:51,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336085871] [2019-11-23 22:29:51,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-11-23 22:29:51,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336085871] [2019-11-23 22:29:51,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425527933] [2019-11-23 22:29:51,885 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 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 22:29:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:51,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:29:51,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-11-23 22:29:51,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:51,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:29:51,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763672310] [2019-11-23 22:29:51,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:29:51,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:51,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:29:51,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:51,992 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 11 states. [2019-11-23 22:29:52,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:52,100 INFO L93 Difference]: Finished difference Result 162 states and 171 transitions. [2019-11-23 22:29:52,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:29:52,101 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 95 [2019-11-23 22:29:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:52,102 INFO L225 Difference]: With dead ends: 162 [2019-11-23 22:29:52,102 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 22:29:52,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:29:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 22:29:52,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2019-11-23 22:29:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 22:29:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2019-11-23 22:29:52,108 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 95 [2019-11-23 22:29:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:52,108 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2019-11-23 22:29:52,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:29:52,109 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2019-11-23 22:29:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 22:29:52,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:52,110 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:52,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:52,320 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:52,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash 863519536, now seen corresponding path program 14 times [2019-11-23 22:29:52,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:52,321 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048002198] [2019-11-23 22:29:52,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-11-23 22:29:52,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048002198] [2019-11-23 22:29:52,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555093609] [2019-11-23 22:29:52,423 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 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 22:29:52,507 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:29:52,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:52,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:29:52,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-11-23 22:29:52,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:52,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:29:52,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195188619] [2019-11-23 22:29:52,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:29:52,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:52,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:29:52,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:29:52,529 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 12 states. [2019-11-23 22:29:52,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:52,654 INFO L93 Difference]: Finished difference Result 172 states and 181 transitions. [2019-11-23 22:29:52,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:29:52,654 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2019-11-23 22:29:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:52,656 INFO L225 Difference]: With dead ends: 172 [2019-11-23 22:29:52,656 INFO L226 Difference]: Without dead ends: 111 [2019-11-23 22:29:52,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 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 22:29:52,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-23 22:29:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2019-11-23 22:29:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 22:29:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 22:29:52,663 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 101 [2019-11-23 22:29:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:52,664 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 22:29:52,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:29:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 22:29:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 22:29:52,666 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:52,666 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:52,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:52,872 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:52,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:52,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1481346514, now seen corresponding path program 15 times [2019-11-23 22:29:52,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:52,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973435368] [2019-11-23 22:29:52,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:29:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2019-11-23 22:29:52,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973435368] [2019-11-23 22:29:52,993 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549733615] [2019-11-23 22:29:52,993 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 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 22:29:53,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:29:53,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:29:53,166 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:29:53,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:29:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-11-23 22:29:53,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:29:53,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-11-23 22:29:53,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571056521] [2019-11-23 22:29:53,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:29:53,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:29:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:29:53,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:29:53,309 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 21 states. [2019-11-23 22:29:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:29:53,477 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2019-11-23 22:29:53,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:29:53,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 107 [2019-11-23 22:29:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:29:53,479 INFO L225 Difference]: With dead ends: 181 [2019-11-23 22:29:53,479 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 22:29:53,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:29:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 22:29:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-11-23 22:29:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 22:29:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 22:29:53,485 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 107 [2019-11-23 22:29:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:29:53,485 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 22:29:53,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:29:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 22:29:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 22:29:53,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:29:53,487 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:29:53,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:29:53,691 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:29:53,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:29:53,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1881354710, now seen corresponding path program 16 times [2019-11-23 22:29:53,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:29:53,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595184316] [2019-11-23 22:29:53,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:29:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:30:03,527 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 77 [2019-11-23 22:30:03,786 WARN L192 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 76 [2019-11-23 22:30:04,027 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 75 [2019-11-23 22:30:04,278 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 74 [2019-11-23 22:30:04,553 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 72 [2019-11-23 22:30:04,826 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 72 [2019-11-23 22:30:05,104 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 68 [2019-11-23 22:30:05,412 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 68 [2019-11-23 22:30:05,737 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2019-11-23 22:30:06,064 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 67 [2019-11-23 22:30:06,442 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 63 [2019-11-23 22:30:06,802 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 63 [2019-11-23 22:30:07,132 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 59 [2019-11-23 22:30:07,422 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2019-11-23 22:30:07,714 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2019-11-23 22:30:08,041 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2019-11-23 22:30:08,339 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2019-11-23 22:30:08,572 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2019-11-23 22:30:12,647 WARN L192 SmtUtils]: Spent 3.62 s on a formula simplification. DAG size of input: 128 DAG size of output: 80 [2019-11-23 22:30:18,815 WARN L192 SmtUtils]: Spent 5.45 s on a formula simplification. DAG size of input: 168 DAG size of output: 57 [2019-11-23 22:30:33,383 WARN L192 SmtUtils]: Spent 6.24 s on a formula simplification. DAG size of input: 167 DAG size of output: 70 [2019-11-23 22:30:43,864 WARN L192 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 181 DAG size of output: 71 [2019-11-23 22:31:06,789 WARN L192 SmtUtils]: Spent 21.12 s on a formula simplification. DAG size of input: 179 DAG size of output: 110