/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:48:10,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:48:10,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:48:10,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:48:10,510 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:48:10,511 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:48:10,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:48:10,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:48:10,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:48:10,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:48:10,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:48:10,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:48:10,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:48:10,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:48:10,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:48:10,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:48:10,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:48:10,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:48:10,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:48:10,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:48:10,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:48:10,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:48:10,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:48:10,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:48:10,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:48:10,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:48:10,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:48:10,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:48:10,582 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 [2020-07-20 10:48:10,616 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:48:10,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:48:10,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:48:10,617 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:48:10,618 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:48:10,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:48:10,619 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:48:10,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:48:10,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:48:10,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:48:10,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:48:10,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:48:10,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:48:10,622 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:48:10,622 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:48:10,622 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:48:10,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:48:10,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:48:10,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:48:10,623 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:48:10,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:48:10,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:48:10,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:48:10,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:48:10,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:48:10,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:48:10,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:10,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:48:10,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:48:10,625 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 10:48:10,936 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:48:10,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:48:10,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:48:10,955 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:48:10,956 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:48:10,956 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-20 10:48:11,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5381f4d8/7848f7b5ed6748db965b8c244c51163c/FLAGae0c9725f [2020-07-20 10:48:11,520 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:48:11,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi01.c [2020-07-20 10:48:11,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5381f4d8/7848f7b5ed6748db965b8c244c51163c/FLAGae0c9725f [2020-07-20 10:48:11,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5381f4d8/7848f7b5ed6748db965b8c244c51163c [2020-07-20 10:48:11,891 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:48:11,895 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:48:11,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:48:11,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:48:11,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:48:11,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:11" (1/1) ... [2020-07-20 10:48:11,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a9b5931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11, skipping insertion in model container [2020-07-20 10:48:11,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:11" (1/1) ... [2020-07-20 10:48:11,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:48:11,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:48:12,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:48:12,119 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:48:12,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:48:12,149 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:48:12,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12 WrapperNode [2020-07-20 10:48:12,150 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:48:12,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:48:12,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:48:12,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:48:12,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12" (1/1) ... [2020-07-20 10:48:12,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12" (1/1) ... [2020-07-20 10:48:12,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12" (1/1) ... [2020-07-20 10:48:12,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12" (1/1) ... [2020-07-20 10:48:12,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12" (1/1) ... [2020-07-20 10:48:12,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12" (1/1) ... [2020-07-20 10:48:12,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12" (1/1) ... [2020-07-20 10:48:12,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:48:12,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:48:12,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:48:12,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:48:12,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12" (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 [2020-07-20 10:48:12,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:48:12,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:48:12,311 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-07-20 10:48:12,311 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2020-07-20 10:48:12,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:48:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:48:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 10:48:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-07-20 10:48:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2020-07-20 10:48:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:48:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:48:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:48:12,528 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:48:12,528 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 10:48:12,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:12 BoogieIcfgContainer [2020-07-20 10:48:12,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:48:12,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:48:12,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:48:12,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:48:12,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:48:11" (1/3) ... [2020-07-20 10:48:12,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ae181b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:12, skipping insertion in model container [2020-07-20 10:48:12,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:12" (2/3) ... [2020-07-20 10:48:12,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ae181b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:12, skipping insertion in model container [2020-07-20 10:48:12,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:12" (3/3) ... [2020-07-20 10:48:12,539 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2020-07-20 10:48:12,550 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:48:12,557 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:48:12,571 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:48:12,596 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:48:12,597 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:48:12,597 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:48:12,597 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:48:12,597 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:48:12,597 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:48:12,597 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:48:12,598 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:48:12,614 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-20 10:48:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 10:48:12,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:12,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:12,623 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:12,629 INFO L82 PathProgramCache]: Analyzing trace with hash -629617454, now seen corresponding path program 1 times [2020-07-20 10:48:12,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:12,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488508271] [2020-07-20 10:48:12,636 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:12,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:48:12,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:48:12,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:48:12,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488508271] [2020-07-20 10:48:12,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:48:12,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 10:48:12,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388980352] [2020-07-20 10:48:12,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 10:48:12,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:12,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 10:48:12,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:48:12,859 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-07-20 10:48:12,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:12,973 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-07-20 10:48:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:48:12,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-07-20 10:48:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:12,987 INFO L225 Difference]: With dead ends: 48 [2020-07-20 10:48:12,988 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 10:48:12,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:48:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 10:48:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 10:48:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 10:48:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-07-20 10:48:13,040 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 20 [2020-07-20 10:48:13,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:13,041 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-07-20 10:48:13,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 10:48:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-07-20 10:48:13,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 10:48:13,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:13,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:13,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:13,260 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:13,260 INFO L82 PathProgramCache]: Analyzing trace with hash 223523063, now seen corresponding path program 1 times [2020-07-20 10:48:13,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:13,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769652188] [2020-07-20 10:48:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:13,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2020-07-20 10:48:13,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 10:48:13,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 10:48:13,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769652188] [2020-07-20 10:48:13,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:13,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2020-07-20 10:48:13,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199154818] [2020-07-20 10:48:13,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 10:48:13,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:13,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 10:48:13,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-07-20 10:48:13,674 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 15 states. [2020-07-20 10:48:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:14,271 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-07-20 10:48:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 10:48:14,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-07-20 10:48:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:14,275 INFO L225 Difference]: With dead ends: 78 [2020-07-20 10:48:14,276 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 10:48:14,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-07-20 10:48:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 10:48:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-07-20 10:48:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 10:48:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2020-07-20 10:48:14,304 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 30 [2020-07-20 10:48:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:14,305 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2020-07-20 10:48:14,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 10:48:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2020-07-20 10:48:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 10:48:14,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:14,309 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:14,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:14,523 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash 640231516, now seen corresponding path program 2 times [2020-07-20 10:48:14,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:14,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879837115] [2020-07-20 10:48:14,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:14,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 10:48:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 10:48:14,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:14,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:14,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 10:48:14,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879837115] [2020-07-20 10:48:14,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:14,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 10:48:14,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328977895] [2020-07-20 10:48:14,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 10:48:14,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:14,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 10:48:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:48:14,989 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand 11 states. [2020-07-20 10:48:15,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:15,213 INFO L93 Difference]: Finished difference Result 108 states and 173 transitions. [2020-07-20 10:48:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:48:15,213 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-20 10:48:15,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:15,219 INFO L225 Difference]: With dead ends: 108 [2020-07-20 10:48:15,219 INFO L226 Difference]: Without dead ends: 74 [2020-07-20 10:48:15,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:48:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-07-20 10:48:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-07-20 10:48:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 10:48:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-20 10:48:15,239 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 40 [2020-07-20 10:48:15,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:15,240 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-20 10:48:15,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 10:48:15,240 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-20 10:48:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-20 10:48:15,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:15,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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] [2020-07-20 10:48:15,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:15,456 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1772916587, now seen corresponding path program 1 times [2020-07-20 10:48:15,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:15,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582801572] [2020-07-20 10:48:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:15,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 10:48:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 10:48:15,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:15,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:15,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:15,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 10:48:15,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582801572] [2020-07-20 10:48:15,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:15,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 10:48:15,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871296329] [2020-07-20 10:48:15,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 10:48:15,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 10:48:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:48:15,848 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 13 states. [2020-07-20 10:48:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:15,999 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2020-07-20 10:48:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:48:15,999 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-07-20 10:48:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:16,001 INFO L225 Difference]: With dead ends: 80 [2020-07-20 10:48:16,001 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 10:48:16,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:48:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 10:48:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-07-20 10:48:16,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 10:48:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-07-20 10:48:16,016 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 36 [2020-07-20 10:48:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:16,016 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-07-20 10:48:16,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 10:48:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-07-20 10:48:16,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 10:48:16,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:16,019 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:16,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:16,234 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:16,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1240446734, now seen corresponding path program 3 times [2020-07-20 10:48:16,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:16,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877084293] [2020-07-20 10:48:16,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:16,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 10:48:16,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 10:48:16,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:16,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-20 10:48:16,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877084293] [2020-07-20 10:48:16,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:16,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11 [2020-07-20 10:48:16,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654549485] [2020-07-20 10:48:16,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 10:48:16,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:16,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 10:48:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:48:16,641 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 11 states. [2020-07-20 10:48:16,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:16,823 INFO L93 Difference]: Finished difference Result 91 states and 141 transitions. [2020-07-20 10:48:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:48:16,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-07-20 10:48:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:16,827 INFO L225 Difference]: With dead ends: 91 [2020-07-20 10:48:16,827 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 10:48:16,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-07-20 10:48:16,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 10:48:16,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-07-20 10:48:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 10:48:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-07-20 10:48:16,839 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 40 [2020-07-20 10:48:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:16,840 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-07-20 10:48:16,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 10:48:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-07-20 10:48:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 10:48:16,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:16,842 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:17,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:17,056 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1471069545, now seen corresponding path program 4 times [2020-07-20 10:48:17,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:17,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219999324] [2020-07-20 10:48:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:17,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 10:48:17,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-07-20 10:48:17,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:17,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:17,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:17,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-20 10:48:17,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219999324] [2020-07-20 10:48:17,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:17,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 10:48:17,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647808322] [2020-07-20 10:48:17,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 10:48:17,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:17,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 10:48:17,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:48:17,577 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 13 states. [2020-07-20 10:48:17,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:17,781 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2020-07-20 10:48:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:48:17,782 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-07-20 10:48:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:17,785 INFO L225 Difference]: With dead ends: 58 [2020-07-20 10:48:17,786 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 10:48:17,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:48:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 10:48:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-20 10:48:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 10:48:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-07-20 10:48:17,801 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 50 [2020-07-20 10:48:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:17,801 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-07-20 10:48:17,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 10:48:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-07-20 10:48:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 10:48:17,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:17,807 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:18,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:18,009 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:18,010 INFO L82 PathProgramCache]: Analyzing trace with hash -979408629, now seen corresponding path program 2 times [2020-07-20 10:48:18,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:18,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365279648] [2020-07-20 10:48:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:18,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 10:48:18,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-07-20 10:48:18,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-20 10:48:18,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365279648] [2020-07-20 10:48:18,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:18,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 27 [2020-07-20 10:48:18,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266360935] [2020-07-20 10:48:18,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 10:48:18,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 10:48:18,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-07-20 10:48:18,819 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 27 states. [2020-07-20 10:48:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:20,503 INFO L93 Difference]: Finished difference Result 105 states and 143 transitions. [2020-07-20 10:48:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 10:48:20,504 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2020-07-20 10:48:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:20,506 INFO L225 Difference]: With dead ends: 105 [2020-07-20 10:48:20,507 INFO L226 Difference]: Without dead ends: 101 [2020-07-20 10:48:20,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=434, Invalid=2322, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 10:48:20,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-07-20 10:48:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2020-07-20 10:48:20,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 10:48:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 115 transitions. [2020-07-20 10:48:20,528 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 115 transitions. Word has length 56 [2020-07-20 10:48:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:20,528 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 115 transitions. [2020-07-20 10:48:20,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 10:48:20,529 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 115 transitions. [2020-07-20 10:48:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 10:48:20,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:20,533 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:20,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:20,745 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:20,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:20,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1033208535, now seen corresponding path program 3 times [2020-07-20 10:48:20,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:20,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346406792] [2020-07-20 10:48:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:20,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 10:48:20,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-20 10:48:20,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:21,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 17 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-07-20 10:48:21,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346406792] [2020-07-20 10:48:21,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:21,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 10:48:21,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389195142] [2020-07-20 10:48:21,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 10:48:21,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 10:48:21,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:48:21,476 INFO L87 Difference]: Start difference. First operand 84 states and 115 transitions. Second operand 17 states. [2020-07-20 10:48:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:21,716 INFO L93 Difference]: Finished difference Result 103 states and 147 transitions. [2020-07-20 10:48:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:48:21,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-07-20 10:48:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:21,720 INFO L225 Difference]: With dead ends: 103 [2020-07-20 10:48:21,720 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 10:48:21,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 10:48:21,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 10:48:21,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-07-20 10:48:21,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 10:48:21,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2020-07-20 10:48:21,757 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 62 [2020-07-20 10:48:21,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:21,758 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2020-07-20 10:48:21,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 10:48:21,758 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2020-07-20 10:48:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 10:48:21,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:21,761 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:21,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:21,963 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:21,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:21,964 INFO L82 PathProgramCache]: Analyzing trace with hash -633873909, now seen corresponding path program 4 times [2020-07-20 10:48:21,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:21,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661184470] [2020-07-20 10:48:21,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 10:48:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 125 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-07-20 10:48:22,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:22,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 48 proven. 135 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2020-07-20 10:48:22,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661184470] [2020-07-20 10:48:22,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:22,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 10:48:22,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257846618] [2020-07-20 10:48:22,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 10:48:22,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:22,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 10:48:22,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:48:22,845 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 17 states. [2020-07-20 10:48:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:23,116 INFO L93 Difference]: Finished difference Result 85 states and 118 transitions. [2020-07-20 10:48:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:48:23,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-07-20 10:48:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:23,119 INFO L225 Difference]: With dead ends: 85 [2020-07-20 10:48:23,119 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 10:48:23,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 163 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-07-20 10:48:23,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 10:48:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-07-20 10:48:23,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 10:48:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2020-07-20 10:48:23,143 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 96 [2020-07-20 10:48:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:23,144 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2020-07-20 10:48:23,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 10:48:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2020-07-20 10:48:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 10:48:23,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:23,148 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 9, 9, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:23,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:23,356 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash -913129353, now seen corresponding path program 5 times [2020-07-20 10:48:23,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:23,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977530701] [2020-07-20 10:48:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:23,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 10:48:23,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 182 proven. 205 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2020-07-20 10:48:23,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:24,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:24,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:24,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:24,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:24,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:24,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:24,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:24,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 182 proven. 218 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2020-07-20 10:48:24,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977530701] [2020-07-20 10:48:24,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:24,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 10:48:24,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103926489] [2020-07-20 10:48:24,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 10:48:24,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:24,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 10:48:24,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 10:48:24,756 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand 19 states. [2020-07-20 10:48:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:25,184 INFO L93 Difference]: Finished difference Result 133 states and 216 transitions. [2020-07-20 10:48:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 10:48:25,185 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 122 [2020-07-20 10:48:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:25,189 INFO L225 Difference]: With dead ends: 133 [2020-07-20 10:48:25,189 INFO L226 Difference]: Without dead ends: 91 [2020-07-20 10:48:25,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 211 SyntacticMatches, 15 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=677, Unknown=0, NotChecked=0, Total=930 [2020-07-20 10:48:25,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-07-20 10:48:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-07-20 10:48:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 10:48:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2020-07-20 10:48:25,202 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 122 [2020-07-20 10:48:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:25,203 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2020-07-20 10:48:25,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 10:48:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2020-07-20 10:48:25,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-07-20 10:48:25,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:25,205 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:25,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:25,417 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:25,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:25,418 INFO L82 PathProgramCache]: Analyzing trace with hash 542454743, now seen corresponding path program 6 times [2020-07-20 10:48:25,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:25,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992149212] [2020-07-20 10:48:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:25,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 91 conjunts are in the unsatisfiable core [2020-07-20 10:48:25,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-07-20 10:48:25,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-07-20 10:48:27,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992149212] [2020-07-20 10:48:27,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:27,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 32] total 45 [2020-07-20 10:48:27,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425411767] [2020-07-20 10:48:27,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 10:48:27,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 10:48:27,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 10:48:27,489 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand 45 states. [2020-07-20 10:48:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:34,502 INFO L93 Difference]: Finished difference Result 211 states and 283 transitions. [2020-07-20 10:48:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-07-20 10:48:34,503 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 102 [2020-07-20 10:48:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:34,508 INFO L225 Difference]: With dead ends: 211 [2020-07-20 10:48:34,508 INFO L226 Difference]: Without dead ends: 207 [2020-07-20 10:48:34,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 148 SyntacticMatches, 14 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3229 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1797, Invalid=10413, Unknown=0, NotChecked=0, Total=12210 [2020-07-20 10:48:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-20 10:48:34,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 189. [2020-07-20 10:48:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-20 10:48:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 258 transitions. [2020-07-20 10:48:34,575 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 258 transitions. Word has length 102 [2020-07-20 10:48:34,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:34,578 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 258 transitions. [2020-07-20 10:48:34,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 10:48:34,579 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 258 transitions. [2020-07-20 10:48:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 10:48:34,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:34,585 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:34,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:34,801 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:34,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1145252683, now seen corresponding path program 7 times [2020-07-20 10:48:34,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:34,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771400164] [2020-07-20 10:48:34,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 10:48:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 138 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-07-20 10:48:35,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:35,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:35,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:35,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:35,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:35,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:35,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:35,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:36,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:36,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:36,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 48 proven. 156 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-07-20 10:48:36,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771400164] [2020-07-20 10:48:36,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:36,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 10:48:36,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331621327] [2020-07-20 10:48:36,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 10:48:36,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:36,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 10:48:36,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 10:48:36,198 INFO L87 Difference]: Start difference. First operand 189 states and 258 transitions. Second operand 21 states. [2020-07-20 10:48:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:36,493 INFO L93 Difference]: Finished difference Result 215 states and 295 transitions. [2020-07-20 10:48:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:48:36,494 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-07-20 10:48:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:36,497 INFO L225 Difference]: With dead ends: 215 [2020-07-20 10:48:36,497 INFO L226 Difference]: Without dead ends: 177 [2020-07-20 10:48:36,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 179 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 10:48:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-20 10:48:36,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2020-07-20 10:48:36,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-20 10:48:36,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 224 transitions. [2020-07-20 10:48:36,524 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 224 transitions. Word has length 108 [2020-07-20 10:48:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:36,525 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 224 transitions. [2020-07-20 10:48:36,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 10:48:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 224 transitions. [2020-07-20 10:48:36,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-07-20 10:48:36,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:36,527 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 12, 11, 11, 11, 11, 11, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:36,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:36,736 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:36,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash -370212393, now seen corresponding path program 8 times [2020-07-20 10:48:36,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:36,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213801993] [2020-07-20 10:48:36,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 10:48:36,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 268 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-07-20 10:48:36,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:37,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:37,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:37,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1136 backedges. 233 proven. 281 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2020-07-20 10:48:38,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213801993] [2020-07-20 10:48:38,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:38,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 10:48:38,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500410620] [2020-07-20 10:48:38,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 10:48:38,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 10:48:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-07-20 10:48:38,280 INFO L87 Difference]: Start difference. First operand 161 states and 224 transitions. Second operand 19 states. [2020-07-20 10:48:38,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:38,648 INFO L93 Difference]: Finished difference Result 252 states and 375 transitions. [2020-07-20 10:48:38,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 10:48:38,649 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 142 [2020-07-20 10:48:38,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:38,652 INFO L225 Difference]: With dead ends: 252 [2020-07-20 10:48:38,652 INFO L226 Difference]: Without dead ends: 182 [2020-07-20 10:48:38,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 251 SyntacticMatches, 15 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2020-07-20 10:48:38,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-20 10:48:38,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2020-07-20 10:48:38,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-20 10:48:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 215 transitions. [2020-07-20 10:48:38,675 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 215 transitions. Word has length 142 [2020-07-20 10:48:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:38,675 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 215 transitions. [2020-07-20 10:48:38,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 10:48:38,676 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 215 transitions. [2020-07-20 10:48:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-07-20 10:48:38,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:38,679 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:38,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:38,893 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:38,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2107974185, now seen corresponding path program 9 times [2020-07-20 10:48:38,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:38,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077832588] [2020-07-20 10:48:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 10:48:39,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 396 refuted. 0 times theorem prover too weak. 1573 trivial. 0 not checked. [2020-07-20 10:48:39,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:39,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:39,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:39,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:40,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:40,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:40,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:40,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:40,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 115 proven. 416 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2020-07-20 10:48:40,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077832588] [2020-07-20 10:48:40,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:40,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 10:48:40,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275983242] [2020-07-20 10:48:40,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 10:48:40,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 10:48:40,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-07-20 10:48:40,801 INFO L87 Difference]: Start difference. First operand 158 states and 215 transitions. Second operand 21 states. [2020-07-20 10:48:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:41,075 INFO L93 Difference]: Finished difference Result 175 states and 232 transitions. [2020-07-20 10:48:41,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:48:41,076 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-07-20 10:48:41,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:41,078 INFO L225 Difference]: With dead ends: 175 [2020-07-20 10:48:41,078 INFO L226 Difference]: Without dead ends: 171 [2020-07-20 10:48:41,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 327 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2020-07-20 10:48:41,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-20 10:48:41,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 161. [2020-07-20 10:48:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-20 10:48:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 218 transitions. [2020-07-20 10:48:41,108 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 218 transitions. Word has length 182 [2020-07-20 10:48:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:41,109 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 218 transitions. [2020-07-20 10:48:41,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 10:48:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 218 transitions. [2020-07-20 10:48:41,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-07-20 10:48:41,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:41,115 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:41,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:41,329 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:41,329 INFO L82 PathProgramCache]: Analyzing trace with hash 836851019, now seen corresponding path program 10 times [2020-07-20 10:48:41,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:41,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175985533] [2020-07-20 10:48:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 175 conjunts are in the unsatisfiable core [2020-07-20 10:48:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2020-07-20 10:48:41,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-07-20 10:48:47,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175985533] [2020-07-20 10:48:47,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:47,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 58] total 75 [2020-07-20 10:48:47,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446105285] [2020-07-20 10:48:47,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-20 10:48:47,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:47,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-20 10:48:47,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=5282, Unknown=0, NotChecked=0, Total=5550 [2020-07-20 10:48:47,049 INFO L87 Difference]: Start difference. First operand 161 states and 218 transitions. Second operand 75 states. [2020-07-20 10:48:47,614 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 49 [2020-07-20 10:48:47,858 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 46 [2020-07-20 10:48:48,138 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 47 [2020-07-20 10:48:48,360 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 43 [2020-07-20 10:48:48,600 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 44 [2020-07-20 10:48:48,817 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 40 [2020-07-20 10:48:49,069 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 41 [2020-07-20 10:48:49,271 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 37 [2020-07-20 10:48:49,541 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 38 [2020-07-20 10:48:49,720 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 34 [2020-07-20 10:48:49,990 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-07-20 10:48:50,178 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2020-07-20 10:48:50,431 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 32 [2020-07-20 10:48:50,605 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 28 [2020-07-20 10:48:50,847 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 29 [2020-07-20 10:48:53,456 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 45 [2020-07-20 10:48:53,879 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 42 [2020-07-20 10:48:54,222 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-07-20 10:48:54,564 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-07-20 10:48:54,875 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-07-20 10:48:55,171 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-20 10:48:55,454 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2020-07-20 10:48:57,456 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 44 [2020-07-20 10:48:57,811 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 46 [2020-07-20 10:48:58,154 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 42 [2020-07-20 10:48:58,498 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 43 [2020-07-20 10:48:58,807 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 39 [2020-07-20 10:48:59,130 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 40 [2020-07-20 10:48:59,430 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2020-07-20 10:48:59,735 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-20 10:49:00,014 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 33 [2020-07-20 10:49:00,328 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-20 10:49:00,583 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 30 [2020-07-20 10:49:00,864 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-20 10:49:01,113 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 26 [2020-07-20 10:49:01,367 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 29 [2020-07-20 10:49:01,602 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 23 [2020-07-20 10:49:01,840 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 26 [2020-07-20 10:49:02,267 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 23 [2020-07-20 10:49:04,810 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 47 [2020-07-20 10:49:05,194 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 50 [2020-07-20 10:49:05,572 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 44 [2020-07-20 10:49:05,957 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 47 [2020-07-20 10:49:06,328 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 41 [2020-07-20 10:49:06,685 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 44 [2020-07-20 10:49:07,026 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 38 [2020-07-20 10:49:07,364 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2020-07-20 10:49:07,678 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-07-20 10:49:08,003 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 38 [2020-07-20 10:49:08,294 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 32 [2020-07-20 10:49:08,606 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 35 [2020-07-20 10:49:08,875 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 30 [2020-07-20 10:49:09,180 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 32 [2020-07-20 10:49:09,404 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2020-07-20 10:49:09,639 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-20 10:49:11,308 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-20 10:49:11,698 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-07-20 10:49:12,497 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2020-07-20 10:49:13,050 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-07-20 10:49:14,824 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-07-20 10:49:15,181 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 35 [2020-07-20 10:49:15,556 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 47 [2020-07-20 10:49:15,930 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 44 [2020-07-20 10:49:16,290 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 41 [2020-07-20 10:49:16,763 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 50 [2020-07-20 10:49:17,408 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-20 10:49:17,819 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-07-20 10:49:18,054 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 7 [2020-07-20 10:49:18,811 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-20 10:49:19,202 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-20 10:49:19,531 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-20 10:49:19,862 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-20 10:49:20,435 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2020-07-20 10:49:21,176 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 23 [2020-07-20 10:49:21,790 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-20 10:49:23,968 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-20 10:49:24,244 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 9 [2020-07-20 10:49:24,762 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 38 [2020-07-20 10:49:25,317 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2020-07-20 10:49:25,605 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-07-20 10:49:26,113 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 44 [2020-07-20 10:49:26,449 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2020-07-20 10:49:27,600 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2020-07-20 10:49:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:27,672 INFO L93 Difference]: Finished difference Result 528 states and 796 transitions. [2020-07-20 10:49:27,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-07-20 10:49:27,673 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 188 [2020-07-20 10:49:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:27,680 INFO L225 Difference]: With dead ends: 528 [2020-07-20 10:49:27,680 INFO L226 Difference]: Without dead ends: 524 [2020-07-20 10:49:27,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 262 SyntacticMatches, 42 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16705 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=8020, Invalid=46970, Unknown=0, NotChecked=0, Total=54990 [2020-07-20 10:49:27,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2020-07-20 10:49:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 441. [2020-07-20 10:49:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-07-20 10:49:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 635 transitions. [2020-07-20 10:49:27,740 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 635 transitions. Word has length 188 [2020-07-20 10:49:27,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:27,741 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 635 transitions. [2020-07-20 10:49:27,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-20 10:49:27,742 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 635 transitions. [2020-07-20 10:49:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-07-20 10:49:27,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:27,748 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 16, 15, 15, 15, 15, 15, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:27,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:27,962 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:27,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1322769943, now seen corresponding path program 11 times [2020-07-20 10:49:27,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:27,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393830197] [2020-07-20 10:49:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:28,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 10:49:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 415 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2020-07-20 10:49:28,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:28,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:28,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:29,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:29,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:29,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:29,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:29,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:29,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:30,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:30,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:30,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:30,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:30,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:30,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:30,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2122 backedges. 115 proven. 447 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-07-20 10:49:30,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393830197] [2020-07-20 10:49:30,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:30,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 10:49:30,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914159143] [2020-07-20 10:49:30,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 10:49:30,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:30,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 10:49:30,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-20 10:49:30,603 INFO L87 Difference]: Start difference. First operand 441 states and 635 transitions. Second operand 25 states. [2020-07-20 10:49:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:31,057 INFO L93 Difference]: Finished difference Result 502 states and 783 transitions. [2020-07-20 10:49:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 10:49:31,058 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 194 [2020-07-20 10:49:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:31,063 INFO L225 Difference]: With dead ends: 502 [2020-07-20 10:49:31,064 INFO L226 Difference]: Without dead ends: 478 [2020-07-20 10:49:31,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 343 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 10:49:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-07-20 10:49:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 427. [2020-07-20 10:49:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-07-20 10:49:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 618 transitions. [2020-07-20 10:49:31,118 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 618 transitions. Word has length 194 [2020-07-20 10:49:31,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:31,119 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 618 transitions. [2020-07-20 10:49:31,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 10:49:31,120 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 618 transitions. [2020-07-20 10:49:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-20 10:49:31,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:31,134 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:31,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:31,348 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash -547968693, now seen corresponding path program 12 times [2020-07-20 10:49:31,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:31,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954571486] [2020-07-20 10:49:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 10:49:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1087 refuted. 0 times theorem prover too weak. 7431 trivial. 0 not checked. [2020-07-20 10:49:31,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:32,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:32,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:32,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:34,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:34,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:34,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:35,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:35,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:35,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:35,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:35,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8772 backedges. 254 proven. 1121 refuted. 0 times theorem prover too weak. 7397 trivial. 0 not checked. [2020-07-20 10:49:35,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954571486] [2020-07-20 10:49:35,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:35,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-20 10:49:35,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572285843] [2020-07-20 10:49:35,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 10:49:35,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:35,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 10:49:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-07-20 10:49:35,408 INFO L87 Difference]: Start difference. First operand 427 states and 618 transitions. Second operand 25 states. [2020-07-20 10:49:35,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:35,890 INFO L93 Difference]: Finished difference Result 478 states and 724 transitions. [2020-07-20 10:49:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 10:49:35,891 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 348 [2020-07-20 10:49:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:35,897 INFO L225 Difference]: With dead ends: 478 [2020-07-20 10:49:35,898 INFO L226 Difference]: Without dead ends: 443 [2020-07-20 10:49:35,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 651 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 10:49:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-07-20 10:49:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 394. [2020-07-20 10:49:35,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-20 10:49:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 572 transitions. [2020-07-20 10:49:35,938 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 572 transitions. Word has length 348 [2020-07-20 10:49:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:35,939 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 572 transitions. [2020-07-20 10:49:35,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 10:49:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 572 transitions. [2020-07-20 10:49:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-20 10:49:35,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:35,944 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:36,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:36,159 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:36,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:36,159 INFO L82 PathProgramCache]: Analyzing trace with hash -604098025, now seen corresponding path program 13 times [2020-07-20 10:49:36,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:36,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471527226] [2020-07-20 10:49:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 339 conjunts are in the unsatisfiable core [2020-07-20 10:49:36,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 2940 refuted. 0 times theorem prover too weak. 5854 trivial. 0 not checked. [2020-07-20 10:49:37,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8794 backedges. 0 proven. 8644 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-07-20 10:49:54,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471527226] [2020-07-20 10:49:54,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:54,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 108] total 129 [2020-07-20 10:49:54,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77802490] [2020-07-20 10:49:54,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2020-07-20 10:49:54,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:54,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2020-07-20 10:49:54,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=16060, Unknown=0, NotChecked=0, Total=16512 [2020-07-20 10:49:54,185 INFO L87 Difference]: Start difference. First operand 394 states and 572 transitions. Second operand 129 states. [2020-07-20 10:49:54,749 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 6 [2020-07-20 10:49:55,678 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 97 [2020-07-20 10:49:56,393 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 94 [2020-07-20 10:49:57,174 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 95 [2020-07-20 10:49:57,874 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 91 [2020-07-20 10:49:58,624 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 92 [2020-07-20 10:49:59,276 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 88 [2020-07-20 10:49:59,983 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 89 [2020-07-20 10:50:00,634 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 85 [2020-07-20 10:50:01,342 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 86 [2020-07-20 10:50:02,005 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 82 [2020-07-20 10:50:02,721 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 83 [2020-07-20 10:50:03,340 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 79 [2020-07-20 10:50:04,122 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 80 [2020-07-20 10:50:04,709 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 76 [2020-07-20 10:50:05,496 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 77 [2020-07-20 10:50:06,107 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 73 [2020-07-20 10:50:06,827 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 74 [2020-07-20 10:50:07,376 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 70 [2020-07-20 10:50:08,076 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 71 [2020-07-20 10:50:08,598 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 67 [2020-07-20 10:50:09,259 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 68 [2020-07-20 10:50:09,788 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 64 [2020-07-20 10:50:10,462 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 65 [2020-07-20 10:50:10,949 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 61 [2020-07-20 10:50:11,577 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 62 [2020-07-20 10:50:12,053 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 58 [2020-07-20 10:50:12,669 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 59 [2020-07-20 10:50:13,116 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 55 [2020-07-20 10:50:13,700 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 56 [2020-07-20 10:50:14,131 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 52 [2020-07-20 10:50:14,728 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2020-07-20 10:50:15,149 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 49 [2020-07-20 10:50:15,705 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2020-07-20 10:50:16,098 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 46 [2020-07-20 10:50:16,626 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 47 [2020-07-20 10:50:16,987 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 43 [2020-07-20 10:50:17,486 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 44 [2020-07-20 10:50:17,841 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 40 [2020-07-20 10:50:18,326 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 41 [2020-07-20 10:50:18,666 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 37 [2020-07-20 10:50:19,133 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 38 [2020-07-20 10:50:19,477 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 34 [2020-07-20 10:50:19,916 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-07-20 10:50:20,221 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2020-07-20 10:50:20,659 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 32 [2020-07-20 10:50:20,947 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 28 [2020-07-20 10:50:21,368 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 29 [2020-07-20 10:50:21,641 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 25 [2020-07-20 10:50:22,042 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 26 [2020-07-20 10:50:26,499 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 89 [2020-07-20 10:50:27,581 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 86 [2020-07-20 10:50:28,636 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 83 [2020-07-20 10:50:29,685 WARN L193 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 80 [2020-07-20 10:50:30,679 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 77 [2020-07-20 10:50:31,653 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 74 [2020-07-20 10:50:32,586 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 71 [2020-07-20 10:50:33,518 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 68 [2020-07-20 10:50:34,390 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 65 [2020-07-20 10:50:35,243 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 62 [2020-07-20 10:50:36,068 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-20 10:50:36,841 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-20 10:50:37,608 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-20 10:50:38,345 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 51 [2020-07-20 10:50:39,045 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-07-20 10:50:39,732 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-20 10:50:40,384 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-20 10:50:41,017 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-20 10:50:41,605 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 36 [2020-07-20 10:50:42,173 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2020-07-20 10:50:42,723 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2020-07-20 10:50:43,263 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 27 [2020-07-20 10:50:43,760 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 24 [2020-07-20 10:50:44,238 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 21 [2020-07-20 10:50:47,483 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 89 [2020-07-20 10:50:48,623 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 91 [2020-07-20 10:50:49,689 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 86 [2020-07-20 10:50:50,782 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 88 [2020-07-20 10:50:51,834 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 83 [2020-07-20 10:50:52,886 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 86 [2020-07-20 10:50:53,884 WARN L193 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 80 [2020-07-20 10:50:54,913 WARN L193 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 83 [2020-07-20 10:50:55,877 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 77 [2020-07-20 10:50:56,864 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 80 [2020-07-20 10:50:57,815 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 74 [2020-07-20 10:50:58,777 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 77 [2020-07-20 10:50:59,703 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 71 [2020-07-20 10:51:00,634 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-20 10:51:01,505 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 68 [2020-07-20 10:51:02,427 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 71 [2020-07-20 10:51:03,287 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 65 [2020-07-20 10:51:04,161 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 68 [2020-07-20 10:51:04,976 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 62 [2020-07-20 10:51:05,834 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2020-07-20 10:51:06,636 WARN L193 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 59 [2020-07-20 10:51:07,454 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 62 [2020-07-20 10:51:08,228 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 56 [2020-07-20 10:51:09,018 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-07-20 10:51:09,777 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 53 [2020-07-20 10:51:10,530 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 56 [2020-07-20 10:51:11,231 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 51 [2020-07-20 10:51:11,966 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 53 [2020-07-20 10:51:12,644 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 48 [2020-07-20 10:51:13,362 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2020-07-20 10:51:13,995 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 45 [2020-07-20 10:51:14,660 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-07-20 10:51:15,280 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 42 [2020-07-20 10:51:15,913 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 44 [2020-07-20 10:51:16,512 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 39 [2020-07-20 10:51:17,128 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 41 [2020-07-20 10:51:17,697 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 36 [2020-07-20 10:51:18,286 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-20 10:51:18,835 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2020-07-20 10:51:19,376 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-07-20 10:51:19,912 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 30 [2020-07-20 10:51:20,444 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2020-07-20 10:51:20,948 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 27 [2020-07-20 10:51:21,459 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 29 [2020-07-20 10:51:21,917 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 24 [2020-07-20 10:51:22,393 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 26 [2020-07-20 10:51:22,839 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 21 [2020-07-20 10:51:23,308 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 23 [2020-07-20 10:51:24,146 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2020-07-20 10:51:26,966 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 10:51:28,901 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 249 DAG size of output: 91 [2020-07-20 10:51:30,222 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-20 10:51:31,456 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 88 [2020-07-20 10:51:32,682 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-20 10:51:33,861 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 85 [2020-07-20 10:51:35,080 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-20 10:51:36,245 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 82 [2020-07-20 10:51:37,424 WARN L193 SmtUtils]: Spent 962.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 85 [2020-07-20 10:51:38,540 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 79 [2020-07-20 10:51:39,688 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 82 [2020-07-20 10:51:40,801 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 77 [2020-07-20 10:51:41,899 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 79 [2020-07-20 10:51:42,988 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 74 [2020-07-20 10:51:44,077 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 76 [2020-07-20 10:51:45,131 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 71 [2020-07-20 10:51:46,196 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 74 [2020-07-20 10:51:47,212 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 68 [2020-07-20 10:51:48,235 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 71 [2020-07-20 10:51:49,218 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 65 [2020-07-20 10:51:50,192 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 68 [2020-07-20 10:51:51,160 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 62 [2020-07-20 10:51:52,109 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 65 [2020-07-20 10:51:53,043 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-07-20 10:51:53,980 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 62 [2020-07-20 10:51:54,878 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 56 [2020-07-20 10:51:55,792 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 59 [2020-07-20 10:51:56,658 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 53 [2020-07-20 10:51:57,525 WARN L193 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 56 [2020-07-20 10:51:58,339 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 50 [2020-07-20 10:51:59,173 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-20 10:51:59,952 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 47 [2020-07-20 10:52:00,760 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 50 [2020-07-20 10:52:01,501 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 44 [2020-07-20 10:52:02,259 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 47 [2020-07-20 10:52:02,981 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 41 [2020-07-20 10:52:03,706 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 44 [2020-07-20 10:52:04,394 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 38 [2020-07-20 10:52:05,097 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 41 [2020-07-20 10:52:05,739 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 35 [2020-07-20 10:52:06,416 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 38 [2020-07-20 10:52:07,014 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 32 [2020-07-20 10:52:07,650 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-07-20 10:52:08,238 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 29 [2020-07-20 10:52:08,852 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 32 [2020-07-20 10:52:09,328 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 10:52:09,829 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-20 10:52:10,279 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 10:52:10,752 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 10:52:13,150 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 10:52:13,590 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 10:52:13,995 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 10:52:14,471 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-20 10:52:14,847 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-07-20 10:52:15,254 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 24 [2020-07-20 10:52:15,713 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-07-20 10:52:16,165 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2020-07-20 10:52:16,657 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-07-20 10:52:19,557 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-07-20 10:52:20,759 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2020-07-20 10:52:21,509 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2020-07-20 10:52:23,675 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-07-20 10:52:24,502 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2020-07-20 10:52:25,476 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 32 [2020-07-20 10:52:27,016 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 41 [2020-07-20 10:52:28,148 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-07-20 10:52:29,285 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-07-20 10:52:30,354 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 50 [2020-07-20 10:52:31,546 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 47 [2020-07-20 10:52:32,651 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 53 [2020-07-20 10:52:33,514 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2020-07-20 10:52:34,664 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 56 [2020-07-20 10:52:35,944 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 65 [2020-07-20 10:52:37,243 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 86 [2020-07-20 10:52:38,679 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 68 [2020-07-20 10:52:40,000 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 74 [2020-07-20 10:52:41,312 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 71 [2020-07-20 10:52:42,667 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 77 [2020-07-20 10:52:43,765 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 59 [2020-07-20 10:52:45,087 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 80 [2020-07-20 10:52:46,457 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 89 [2020-07-20 10:52:48,060 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 211 DAG size of output: 92 [2020-07-20 10:52:49,596 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 220 DAG size of output: 95 [2020-07-20 10:52:50,983 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 83 [2020-07-20 10:52:52,710 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 229 DAG size of output: 98 [2020-07-20 10:52:53,609 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 33 [2020-07-20 10:52:54,213 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-07-20 10:52:55,997 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 259 DAG size of output: 94 [2020-07-20 10:52:57,686 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 268 DAG size of output: 97 [2020-07-20 10:52:59,392 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 251 DAG size of output: 91 [2020-07-20 10:53:01,013 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 260 DAG size of output: 94 [2020-07-20 10:53:02,554 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 244 DAG size of output: 88 [2020-07-20 10:53:04,149 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 252 DAG size of output: 91 [2020-07-20 10:53:05,663 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 239 DAG size of output: 85 [2020-07-20 10:53:07,217 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 245 DAG size of output: 88 [2020-07-20 10:53:08,810 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 232 DAG size of output: 82 [2020-07-20 10:53:10,341 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 240 DAG size of output: 85 [2020-07-20 10:53:11,815 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 224 DAG size of output: 79 [2020-07-20 10:53:13,329 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 233 DAG size of output: 82 [2020-07-20 10:53:14,793 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 219 DAG size of output: 76 [2020-07-20 10:53:16,252 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 225 DAG size of output: 79 [2020-07-20 10:53:17,662 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 73 [2020-07-20 10:53:19,088 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 220 DAG size of output: 76 [2020-07-20 10:53:20,464 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 70 [2020-07-20 10:53:21,860 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 214 DAG size of output: 73 [2020-07-20 10:53:23,499 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 258 DAG size of output: 95 [2020-07-20 10:53:25,239 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 266 DAG size of output: 98 [2020-07-20 10:53:26,593 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 67 [2020-07-20 10:53:27,964 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 70 [2020-07-20 10:53:29,598 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 250 DAG size of output: 92 [2020-07-20 10:53:30,927 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 64 [2020-07-20 10:53:32,243 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 67 [2020-07-20 10:53:33,892 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 243 DAG size of output: 89 [2020-07-20 10:53:35,196 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 61 [2020-07-20 10:53:36,481 WARN L193 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 64 [2020-07-20 10:53:38,117 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 238 DAG size of output: 86 [2020-07-20 10:53:39,449 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 58 [2020-07-20 10:53:40,733 WARN L193 SmtUtils]: Spent 835.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 61 [2020-07-20 10:53:42,477 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 231 DAG size of output: 83 [2020-07-20 10:53:43,778 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 55 [2020-07-20 10:53:45,035 WARN L193 SmtUtils]: Spent 783.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 58 [2020-07-20 10:53:46,733 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 223 DAG size of output: 80 [2020-07-20 10:53:47,930 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 53 [2020-07-20 10:53:49,146 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 55 [2020-07-20 10:53:50,845 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 218 DAG size of output: 77 [2020-07-20 10:53:52,084 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-07-20 10:53:53,133 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-20 10:53:54,300 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-07-20 10:53:55,303 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 51 [2020-07-20 10:53:56,290 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-07-20 10:53:57,266 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 48 [2020-07-20 10:53:58,331 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-07-20 10:53:59,268 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 45 [2020-07-20 10:54:00,304 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-07-20 10:54:01,186 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 42 [2020-07-20 10:54:02,075 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-07-20 10:54:02,918 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 39 [2020-07-20 10:54:04,779 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-07-20 10:54:05,290 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 20 [2020-07-20 10:54:05,974 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 32 [2020-07-20 10:54:06,524 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2020-07-20 10:54:07,168 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 29 [2020-07-20 10:54:11,430 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 53 [2020-07-20 10:54:13,190 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2020-07-20 10:54:14,451 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 26 [2020-07-20 10:54:16,000 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 200 DAG size of output: 83 [2020-07-20 10:54:18,039 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 62 [2020-07-20 10:54:19,531 WARN L193 SmtUtils]: Spent 853.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 65 [2020-07-20 10:54:20,674 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 29 [2020-07-20 10:54:22,226 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 71 [2020-07-20 10:54:23,740 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 68 [2020-07-20 10:54:25,472 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 74 [2020-07-20 10:54:26,904 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-07-20 10:54:28,694 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 187 DAG size of output: 77 [2020-07-20 10:54:29,933 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 38 [2020-07-20 10:54:31,566 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 208 DAG size of output: 86 [2020-07-20 10:54:32,859 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 41 [2020-07-20 10:54:34,544 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 217 DAG size of output: 89 [2020-07-20 10:54:35,943 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 35 [2020-07-20 10:54:37,310 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 47 [2020-07-20 10:54:38,183 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 14 [2020-07-20 10:54:39,461 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2020-07-20 10:54:40,821 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 44 [2020-07-20 10:54:42,270 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 23 [2020-07-20 10:54:43,674 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 50 [2020-07-20 10:54:51,223 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 41 [2020-07-20 10:54:55,785 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 53 [2020-07-20 10:54:57,798 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 50 [2020-07-20 10:54:59,791 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 226 DAG size of output: 92 [2020-07-20 10:55:00,719 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 14 [2020-07-20 10:55:01,760 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 47 [2020-07-20 10:55:02,774 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-07-20 10:55:03,618 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-07-20 10:55:05,051 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-07-20 10:55:24,475 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 231 DAG size of output: 98 [2020-07-20 10:55:25,545 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 7 [2020-07-20 10:55:26,254 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 6 [2020-07-20 10:55:26,955 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 10:55:29,297 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 222 DAG size of output: 95 [2020-07-20 10:55:31,419 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 213 DAG size of output: 92 [2020-07-20 10:55:33,409 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 205 DAG size of output: 89 [2020-07-20 10:55:35,609 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 199 DAG size of output: 86 [2020-07-20 10:55:37,737 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 192 DAG size of output: 83 [2020-07-20 10:55:39,782 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 184 DAG size of output: 80 [2020-07-20 10:55:41,658 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 178 DAG size of output: 77 [2020-07-20 10:55:43,771 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 171 DAG size of output: 74 [2020-07-20 10:55:47,564 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 56 [2020-07-20 10:55:49,683 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 162 DAG size of output: 71 [2020-07-20 10:55:51,620 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 154 DAG size of output: 68 [2020-07-20 10:55:53,738 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 148 DAG size of output: 65 [2020-07-20 10:55:55,438 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 62 [2020-07-20 10:55:57,035 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 59 [2020-07-20 10:55:59,133 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2020-07-20 10:56:00,794 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 56 [2020-07-20 10:56:02,719 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 194 DAG size of output: 80 [2020-07-20 10:56:05,071 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 38 [2020-07-20 10:56:11,926 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 10:56:12,696 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 10:56:13,542 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 10:56:14,315 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 10:56:15,173 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 10:56:15,952 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 10:56:16,798 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 9 [2020-07-20 10:56:17,579 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 8 [2020-07-20 10:56:18,847 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 9 [2020-07-20 10:56:20,111 WARN L193 SmtUtils]: Spent 848.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 9 [2020-07-20 10:56:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:56:20,418 INFO L93 Difference]: Finished difference Result 1231 states and 2149 transitions. [2020-07-20 10:56:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 402 states. [2020-07-20 10:56:20,421 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 354 [2020-07-20 10:56:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:56:20,436 INFO L225 Difference]: With dead ends: 1231 [2020-07-20 10:56:20,436 INFO L226 Difference]: Without dead ends: 1227 [2020-07-20 10:56:20,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1097 GetRequests, 516 SyntacticMatches, 66 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88088 ImplicationChecksByTransitivity, 304.3s TimeCoverageRelationStatistics Valid=38389, Invalid=228383, Unknown=0, NotChecked=0, Total=266772 [2020-07-20 10:56:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2020-07-20 10:56:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1036. [2020-07-20 10:56:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2020-07-20 10:56:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1613 transitions. [2020-07-20 10:56:20,606 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1613 transitions. Word has length 354 [2020-07-20 10:56:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:56:20,607 INFO L479 AbstractCegarLoop]: Abstraction has 1036 states and 1613 transitions. [2020-07-20 10:56:20,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 129 states. [2020-07-20 10:56:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1613 transitions. [2020-07-20 10:56:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2020-07-20 10:56:20,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:56:20,617 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:56:20,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:56:20,833 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:56:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:56:20,834 INFO L82 PathProgramCache]: Analyzing trace with hash 800684683, now seen corresponding path program 14 times [2020-07-20 10:56:20,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:56:20,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608707591] [2020-07-20 10:56:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:56:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:56:21,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 10:56:21,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:56:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1112 refuted. 0 times theorem prover too weak. 7456 trivial. 0 not checked. [2020-07-20 10:56:22,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:56:24,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:24,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:24,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:24,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:25,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:25,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:25,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:30,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:32,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:32,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:33,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:33,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:33,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:33,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8822 backedges. 254 proven. 1162 refuted. 0 times theorem prover too weak. 7406 trivial. 0 not checked. [2020-07-20 10:56:33,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608707591] [2020-07-20 10:56:33,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:56:33,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-20 10:56:33,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133996434] [2020-07-20 10:56:33,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 10:56:33,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:56:33,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 10:56:33,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-20 10:56:33,802 INFO L87 Difference]: Start difference. First operand 1036 states and 1613 transitions. Second operand 29 states. [2020-07-20 10:56:35,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:56:35,256 INFO L93 Difference]: Finished difference Result 1221 states and 2313 transitions. [2020-07-20 10:56:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 10:56:35,261 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 360 [2020-07-20 10:56:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:56:35,273 INFO L225 Difference]: With dead ends: 1221 [2020-07-20 10:56:35,274 INFO L226 Difference]: Without dead ends: 1194 [2020-07-20 10:56:35,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 731 GetRequests, 667 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=319, Invalid=1321, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 10:56:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-07-20 10:56:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1024. [2020-07-20 10:56:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-07-20 10:56:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1655 transitions. [2020-07-20 10:56:35,436 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1655 transitions. Word has length 360 [2020-07-20 10:56:35,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:56:35,437 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 1655 transitions. [2020-07-20 10:56:35,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 10:56:35,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1655 transitions. [2020-07-20 10:56:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-20 10:56:35,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:56:35,455 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 40, 39, 39, 39, 39, 39, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:56:35,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:56:35,669 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:56:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:56:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash 548363287, now seen corresponding path program 15 times [2020-07-20 10:56:35,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:56:35,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808877289] [2020-07-20 10:56:35,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:56:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:56:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 2034 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 10:56:36,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:56:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 1076 proven. 2067 refuted. 0 times theorem prover too weak. 10715 trivial. 0 not checked. [2020-07-20 10:56:36,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:56:43,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:45,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:45,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:45,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:46,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:46,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:49,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:49,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:50,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:50,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:50,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:50,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13858 backedges. 1076 proven. 2108 refuted. 0 times theorem prover too weak. 10674 trivial. 0 not checked. [2020-07-20 10:56:50,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808877289] [2020-07-20 10:56:50,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:56:50,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 27 [2020-07-20 10:56:50,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692543038] [2020-07-20 10:56:50,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 10:56:50,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:56:50,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 10:56:50,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-07-20 10:56:50,732 INFO L87 Difference]: Start difference. First operand 1024 states and 1655 transitions. Second operand 27 states. [2020-07-20 10:56:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:56:53,101 INFO L93 Difference]: Finished difference Result 2084 states and 3744 transitions. [2020-07-20 10:56:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 10:56:53,106 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 434 [2020-07-20 10:56:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:56:53,117 INFO L225 Difference]: With dead ends: 2084 [2020-07-20 10:56:53,117 INFO L226 Difference]: Without dead ends: 1310 [2020-07-20 10:56:53,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 819 SyntacticMatches, 23 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=504, Invalid=1476, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 10:56:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2020-07-20 10:56:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 981. [2020-07-20 10:56:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-07-20 10:56:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1359 transitions. [2020-07-20 10:56:53,257 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1359 transitions. Word has length 434 [2020-07-20 10:56:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:56:53,258 INFO L479 AbstractCegarLoop]: Abstraction has 981 states and 1359 transitions. [2020-07-20 10:56:53,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 10:56:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1359 transitions. [2020-07-20 10:56:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-07-20 10:56:53,268 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:56:53,269 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:56:53,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:56:53,483 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:56:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:56:53,484 INFO L82 PathProgramCache]: Analyzing trace with hash 2099436055, now seen corresponding path program 16 times [2020-07-20 10:56:53,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:56:53,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192798406] [2020-07-20 10:56:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:56:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:56:54,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 3210 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 10:56:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:56:54,758 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2750 refuted. 0 times theorem prover too weak. 32675 trivial. 0 not checked. [2020-07-20 10:56:54,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:56:56,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:56,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:56,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:56,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:56,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:56,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:56:57,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:00,391 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 10:57:07,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:10,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:12,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:12,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:12,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:13,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:13,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:13,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:13,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:57:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 35962 backedges. 537 proven. 2802 refuted. 0 times theorem prover too weak. 32623 trivial. 0 not checked. [2020-07-20 10:57:13,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192798406] [2020-07-20 10:57:13,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:57:13,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-20 10:57:13,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953441887] [2020-07-20 10:57:13,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 10:57:13,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:57:13,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 10:57:13,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-07-20 10:57:13,686 INFO L87 Difference]: Start difference. First operand 981 states and 1359 transitions. Second operand 29 states. [2020-07-20 10:57:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:57:15,201 INFO L93 Difference]: Finished difference Result 1043 states and 1420 transitions. [2020-07-20 10:57:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 10:57:15,206 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 674 [2020-07-20 10:57:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:57:15,216 INFO L225 Difference]: With dead ends: 1043 [2020-07-20 10:57:15,216 INFO L226 Difference]: Without dead ends: 1036 [2020-07-20 10:57:15,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1359 GetRequests, 1295 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=325, Invalid=1315, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 10:57:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2020-07-20 10:57:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 978. [2020-07-20 10:57:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 978 states. [2020-07-20 10:57:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1353 transitions. [2020-07-20 10:57:15,332 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1353 transitions. Word has length 674 [2020-07-20 10:57:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:57:15,333 INFO L479 AbstractCegarLoop]: Abstraction has 978 states and 1353 transitions. [2020-07-20 10:57:15,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 10:57:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1353 transitions. [2020-07-20 10:57:15,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2020-07-20 10:57:15,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:57:15,345 INFO L422 BasicCegarLoop]: trace histogram [127, 127, 64, 63, 63, 63, 63, 63, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:57:15,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:57:15,559 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:57:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:57:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash 2092966539, now seen corresponding path program 17 times [2020-07-20 10:57:15,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:57:15,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963147903] [2020-07-20 10:57:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:57:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:57:16,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 3224 conjuncts, 663 conjunts are in the unsatisfiable core [2020-07-20 10:57:16,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:57:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 12010 refuted. 0 times theorem prover too weak. 23980 trivial. 0 not checked. [2020-07-20 10:57:19,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:59:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 35990 backedges. 0 proven. 35698 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-07-20 10:59:24,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963147903] [2020-07-20 10:59:24,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:59:24,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 206] total 231 [2020-07-20 10:59:24,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140105636] [2020-07-20 10:59:24,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 231 states [2020-07-20 10:59:24,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:59:24,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 231 interpolants. [2020-07-20 10:59:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=52346, Unknown=0, NotChecked=0, Total=53130 [2020-07-20 10:59:24,350 INFO L87 Difference]: Start difference. First operand 978 states and 1353 transitions. Second operand 231 states. [2020-07-20 10:59:26,943 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 377 DAG size of output: 6 [2020-07-20 10:59:32,639 WARN L193 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 440 DAG size of output: 193 [2020-07-20 10:59:37,038 WARN L193 SmtUtils]: Spent 3.91 s on a formula simplification. DAG size of input: 414 DAG size of output: 190 [2020-07-20 10:59:41,543 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 434 DAG size of output: 191 [2020-07-20 10:59:46,080 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 408 DAG size of output: 187 [2020-07-20 10:59:51,086 WARN L193 SmtUtils]: Spent 4.56 s on a formula simplification. DAG size of input: 428 DAG size of output: 188 [2020-07-20 10:59:55,552 WARN L193 SmtUtils]: Spent 3.98 s on a formula simplification. DAG size of input: 402 DAG size of output: 184 [2020-07-20 11:00:00,468 WARN L193 SmtUtils]: Spent 4.43 s on a formula simplification. DAG size of input: 422 DAG size of output: 185 [2020-07-20 11:00:04,737 WARN L193 SmtUtils]: Spent 3.78 s on a formula simplification. DAG size of input: 396 DAG size of output: 181 [2020-07-20 11:00:09,715 WARN L193 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 416 DAG size of output: 182 [2020-07-20 11:00:14,002 WARN L193 SmtUtils]: Spent 3.77 s on a formula simplification. DAG size of input: 391 DAG size of output: 178 [2020-07-20 11:00:18,367 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification. DAG size of input: 411 DAG size of output: 179 [2020-07-20 11:00:22,644 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 386 DAG size of output: 175 [2020-07-20 11:00:26,641 WARN L193 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 406 DAG size of output: 176 [2020-07-20 11:00:30,754 WARN L193 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 380 DAG size of output: 172 [2020-07-20 11:00:35,953 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 399 DAG size of output: 173 [2020-07-20 11:00:40,035 WARN L193 SmtUtils]: Spent 3.55 s on a formula simplification. DAG size of input: 376 DAG size of output: 169 [2020-07-20 11:00:45,166 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 395 DAG size of output: 170 [2020-07-20 11:00:49,124 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 371 DAG size of output: 166 [2020-07-20 11:00:54,244 WARN L193 SmtUtils]: Spent 3.97 s on a formula simplification. DAG size of input: 390 DAG size of output: 167 [2020-07-20 11:00:57,956 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 364 DAG size of output: 163 [2020-07-20 11:01:03,279 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 383 DAG size of output: 164 [2020-07-20 11:01:07,155 WARN L193 SmtUtils]: Spent 3.33 s on a formula simplification. DAG size of input: 357 DAG size of output: 160 [2020-07-20 11:01:12,000 WARN L193 SmtUtils]: Spent 3.53 s on a formula simplification. DAG size of input: 376 DAG size of output: 161 [2020-07-20 11:01:16,204 WARN L193 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 352 DAG size of output: 157 [2020-07-20 11:01:20,808 WARN L193 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 371 DAG size of output: 158 [2020-07-20 11:01:24,635 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 347 DAG size of output: 154 [2020-07-20 11:01:29,339 WARN L193 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 366 DAG size of output: 155 [2020-07-20 11:01:33,204 WARN L193 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 340 DAG size of output: 151 [2020-07-20 11:01:38,125 WARN L193 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 359 DAG size of output: 152 [2020-07-20 11:01:42,142 WARN L193 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 336 DAG size of output: 148