/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/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:04:02,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:04:02,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:04:02,871 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:04:02,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:04:02,872 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:04:02,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:04:02,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:04:02,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:04:02,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:04:02,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:04:02,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:04:02,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:04:02,883 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:04:02,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:04:02,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:04:02,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:04:02,887 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:04:02,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:04:02,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:04:02,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:04:02,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:04:02,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:04:02,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:04:02,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 12:04:02,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 12:04:02,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 12:04:02,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 12:04:02,903 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 12:04:02,904 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 12:04:02,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:04:02,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:04:02,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:04:02,912 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 12:04:02,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:04:02,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:04:02,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:04:02,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:04:02,930 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:04:02,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:04:02,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:04:02,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:04:02,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:04:02,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:04:02,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:04:02,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:04:02,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:04:02,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:04:02,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:04:02,932 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:04:02,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:04:02,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:04:02,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:04:02,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:04:02,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:04:02,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:04:02,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:04:02,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:04:02,934 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:04:02,934 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:04:02,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:02,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:04:02,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:04:02,935 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 12:04:03,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:04:03,255 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:04:03,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:04:03,261 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:04:03,262 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:04:03,262 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-07-20 12:04:03,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1f889bf/125702a8e7e94843849e4bddff50662d/FLAGeba181bf3 [2020-07-20 12:04:03,845 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:04:03,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-07-20 12:04:03,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1f889bf/125702a8e7e94843849e4bddff50662d/FLAGeba181bf3 [2020-07-20 12:04:04,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca1f889bf/125702a8e7e94843849e4bddff50662d [2020-07-20 12:04:04,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:04:04,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:04:04,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:04:04,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:04:04,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:04:04,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:04:04" (1/1) ... [2020-07-20 12:04:04,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be5ffd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04, skipping insertion in model container [2020-07-20 12:04:04,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:04:04" (1/1) ... [2020-07-20 12:04:04,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:04:04,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:04:04,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:04:04,492 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:04:04,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:04:04,523 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:04:04,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04 WrapperNode [2020-07-20 12:04:04,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:04:04,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:04:04,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:04:04,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:04:04,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04" (1/1) ... [2020-07-20 12:04:04,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04" (1/1) ... [2020-07-20 12:04:04,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04" (1/1) ... [2020-07-20 12:04:04,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04" (1/1) ... [2020-07-20 12:04:04,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04" (1/1) ... [2020-07-20 12:04:04,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04" (1/1) ... [2020-07-20 12:04:04,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04" (1/1) ... [2020-07-20 12:04:04,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:04:04,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:04:04,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:04:04,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:04:04,651 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04" (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 12:04:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:04:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:04:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:04:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 12:04:04,722 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:04:04,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:04:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:04:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:04:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 12:04:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:04:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:04:04,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:04:04,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:04:04,960 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:04:04,960 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 12:04:04,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:04:04 BoogieIcfgContainer [2020-07-20 12:04:04,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:04:04,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:04:04,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:04:04,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:04:04,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:04:04" (1/3) ... [2020-07-20 12:04:04,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c76d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:04:04, skipping insertion in model container [2020-07-20 12:04:04,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:04:04" (2/3) ... [2020-07-20 12:04:04,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c76d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:04:04, skipping insertion in model container [2020-07-20 12:04:04,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:04:04" (3/3) ... [2020-07-20 12:04:04,975 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-07-20 12:04:04,986 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:04:04,993 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:04:05,008 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:04:05,032 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:04:05,032 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:04:05,033 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:04:05,033 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:04:05,033 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:04:05,033 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:04:05,033 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:04:05,034 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:04:05,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 12:04:05,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 12:04:05,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:05,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:05,067 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:05,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:05,074 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-20 12:04:05,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:05,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354769121] [2020-07-20 12:04:05,086 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 12:04:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 12:04:05,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:05,174 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 12:04:05,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:04:05,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354769121] [2020-07-20 12:04:05,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:04:05,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 12:04:05,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827497767] [2020-07-20 12:04:05,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 12:04:05,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:05,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 12:04:05,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:04:05,215 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-20 12:04:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:05,253 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-20 12:04:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 12:04:05,256 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-20 12:04:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:05,266 INFO L225 Difference]: With dead ends: 33 [2020-07-20 12:04:05,266 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 12:04:05,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:04:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 12:04:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 12:04:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 12:04:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-20 12:04:05,358 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-07-20 12:04:05,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:05,360 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-20 12:04:05,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 12:04:05,360 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-20 12:04:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 12:04:05,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:05,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:05,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:05,577 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:05,578 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-07-20 12:04:05,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:05,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985877013] [2020-07-20 12:04:05,580 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 12:04:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:05,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:04:05,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:05,720 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:04:05,757 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 12:04:05,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:04:05,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985877013] [2020-07-20 12:04:05,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:04:05,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 12:04:05,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661839137] [2020-07-20 12:04:05,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 12:04:05,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:05,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 12:04:05,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 12:04:05,763 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-07-20 12:04:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:05,883 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-20 12:04:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 12:04:05,884 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-20 12:04:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:05,888 INFO L225 Difference]: With dead ends: 26 [2020-07-20 12:04:05,889 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 12:04:05,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 12:04:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 12:04:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-07-20 12:04:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 12:04:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 12:04:05,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-07-20 12:04:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:05,900 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 12:04:05,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 12:04:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 12:04:05,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 12:04:05,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:05,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:06,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:06,117 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-07-20 12:04:06,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:06,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744807568] [2020-07-20 12:04:06,119 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 12:04:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:06,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 12:04:06,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:06,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:04:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:06,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744807568] [2020-07-20 12:04:06,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:04:06,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-20 12:04:06,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700013032] [2020-07-20 12:04:06,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 12:04:06,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:06,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 12:04:06,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-20 12:04:06,309 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2020-07-20 12:04:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:06,446 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-07-20 12:04:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 12:04:06,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-07-20 12:04:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:06,448 INFO L225 Difference]: With dead ends: 31 [2020-07-20 12:04:06,449 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 12:04:06,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-20 12:04:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 12:04:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-07-20 12:04:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 12:04:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 12:04:06,456 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-07-20 12:04:06,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:06,457 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 12:04:06,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 12:04:06,457 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 12:04:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 12:04:06,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:06,459 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:06,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:06,672 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:06,673 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-07-20 12:04:06,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:06,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366684096] [2020-07-20 12:04:06,674 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 12:04:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 12:04:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:06,818 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:04:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:06,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:04:06,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:04:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:07,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366684096] [2020-07-20 12:04:07,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:04:07,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-20 12:04:07,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405263752] [2020-07-20 12:04:07,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 12:04:07,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:07,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 12:04:07,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-20 12:04:07,233 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 17 states. [2020-07-20 12:04:07,648 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-20 12:04:08,131 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-07-20 12:04:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:08,336 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-20 12:04:08,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 12:04:08,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-07-20 12:04:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:08,337 INFO L225 Difference]: With dead ends: 46 [2020-07-20 12:04:08,338 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 12:04:08,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-07-20 12:04:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 12:04:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-20 12:04:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 12:04:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-20 12:04:08,346 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-20 12:04:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:08,347 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-20 12:04:08,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 12:04:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-20 12:04:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 12:04:08,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:08,348 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:08,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:08,564 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1027624830, now seen corresponding path program 2 times [2020-07-20 12:04:08,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:08,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965220304] [2020-07-20 12:04:08,567 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 12:04:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:08,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 12:04:08,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:08,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:04:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-20 12:04:08,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965220304] [2020-07-20 12:04:08,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:04:08,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2020-07-20 12:04:08,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938628424] [2020-07-20 12:04:08,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 12:04:08,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:08,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 12:04:08,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-07-20 12:04:08,895 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 17 states. [2020-07-20 12:04:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:09,261 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-20 12:04:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 12:04:09,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-07-20 12:04:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:09,265 INFO L225 Difference]: With dead ends: 48 [2020-07-20 12:04:09,266 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 12:04:09,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-07-20 12:04:09,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 12:04:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-07-20 12:04:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 12:04:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-07-20 12:04:09,283 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2020-07-20 12:04:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:09,284 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-07-20 12:04:09,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 12:04:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-07-20 12:04:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-20 12:04:09,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:09,285 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:09,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:09,487 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash -490417350, now seen corresponding path program 3 times [2020-07-20 12:04:09,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:09,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445709860] [2020-07-20 12:04:09,489 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 12:04:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:09,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 12:04:09,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:09,708 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:04:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:09,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:04:09,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:04:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:10,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445709860] [2020-07-20 12:04:10,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:04:10,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-20 12:04:10,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165372418] [2020-07-20 12:04:10,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 12:04:10,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:10,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 12:04:10,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-07-20 12:04:10,523 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2020-07-20 12:04:11,315 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-07-20 12:04:11,494 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-07-20 12:04:11,843 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-07-20 12:04:12,383 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-07-20 12:04:12,582 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:04:12,781 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-20 12:04:12,974 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-20 12:04:13,141 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-20 12:04:13,341 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-07-20 12:04:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:13,857 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-07-20 12:04:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-20 12:04:13,858 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2020-07-20 12:04:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:13,860 INFO L225 Difference]: With dead ends: 62 [2020-07-20 12:04:13,860 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 12:04:13,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=578, Invalid=2392, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 12:04:13,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 12:04:13,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 12:04:13,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 12:04:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-07-20 12:04:13,875 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 29 [2020-07-20 12:04:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:13,875 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-07-20 12:04:13,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 12:04:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-07-20 12:04:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-20 12:04:13,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:13,877 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:14,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:14,092 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:14,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2033682622, now seen corresponding path program 4 times [2020-07-20 12:04:14,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:14,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943185355] [2020-07-20 12:04:14,095 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 12:04:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:14,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-20 12:04:14,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:14,697 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:04:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:14,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:04:14,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:04:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:17,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943185355] [2020-07-20 12:04:17,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:04:17,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-20 12:04:17,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469778601] [2020-07-20 12:04:17,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-20 12:04:17,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:17,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-20 12:04:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 12:04:17,331 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2020-07-20 12:04:19,611 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 12:04:20,109 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:04:20,321 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:20,512 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:04:20,712 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:21,122 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:21,533 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:21,741 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:04:21,972 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:04:22,164 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:04:22,375 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-20 12:04:22,581 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-07-20 12:04:22,797 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-20 12:04:22,990 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-20 12:04:23,185 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 12:04:23,394 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 12:04:23,631 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:04:23,836 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 12:04:24,070 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:04:24,294 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-20 12:04:24,524 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:04:24,735 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:04:24,987 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 12:04:25,302 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-20 12:04:25,554 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-20 12:04:25,786 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-20 12:04:26,026 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-20 12:04:26,314 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-20 12:04:26,630 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-20 12:04:26,866 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-20 12:04:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:04:27,377 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-07-20 12:04:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-20 12:04:27,379 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2020-07-20 12:04:27,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:04:27,381 INFO L225 Difference]: With dead ends: 114 [2020-07-20 12:04:27,381 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 12:04:27,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2424, Invalid=9786, Unknown=0, NotChecked=0, Total=12210 [2020-07-20 12:04:27,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 12:04:27,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-20 12:04:27,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-20 12:04:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-07-20 12:04:27,421 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 53 [2020-07-20 12:04:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:04:27,424 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-07-20 12:04:27,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-20 12:04:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-07-20 12:04:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-20 12:04:27,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:04:27,431 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:04:27,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:04:27,633 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:04:27,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:04:27,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1181026478, now seen corresponding path program 5 times [2020-07-20 12:04:27,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:04:27,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836454816] [2020-07-20 12:04:27,635 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 12:04:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:04:27,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-20 12:04:27,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:04:29,693 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:04:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:29,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:04:30,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:04:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:04:39,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836454816] [2020-07-20 12:04:39,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:04:39,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-20 12:04:39,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958839474] [2020-07-20 12:04:39,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-20 12:04:39,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:04:39,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-20 12:04:39,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7951, Unknown=0, NotChecked=0, Total=10100 [2020-07-20 12:04:39,170 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2020-07-20 12:04:44,510 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 12:04:44,819 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 12:04:45,131 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-20 12:04:45,403 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-07-20 12:04:45,679 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-20 12:04:46,724 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:04:47,053 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:47,300 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:04:47,634 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:47,961 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:48,359 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:48,744 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 12:04:49,112 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:49,400 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:04:49,722 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:04:50,063 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:04:50,448 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 12:04:50,823 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 12:04:51,259 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 12:04:51,635 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-20 12:04:52,058 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:52,398 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:52,804 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:53,205 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:04:53,665 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:54,078 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:04:54,519 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:54,862 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:55,286 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:55,754 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:04:56,258 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:56,640 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:04:57,018 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:57,404 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:57,853 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:58,268 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:04:58,675 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:04:59,013 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:04:59,432 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:04:59,795 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:05:00,215 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:05:00,623 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:05:01,037 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:05:01,415 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:05:01,876 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:05:02,298 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:05:02,776 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:05:03,357 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:05:03,850 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:05:04,264 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:05:04,753 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:05:05,194 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:05:05,695 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:05:06,176 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:05:06,629 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:05:07,010 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:05:07,479 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:05:07,940 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:05:08,431 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:05:09,050 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:05:09,572 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:05:09,951 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:05:10,506 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:05:10,967 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:05:11,504 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:05:12,010 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 12:05:12,480 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:05:12,905 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:05:13,464 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 12:05:13,932 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 12:05:14,492 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:05:15,086 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 12:05:15,726 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:05:16,291 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-20 12:05:16,937 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:05:17,479 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:05:18,012 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 12:05:18,682 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-20 12:05:19,263 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-20 12:05:19,815 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-20 12:05:20,482 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-20 12:05:21,138 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-20 12:05:21,738 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-20 12:05:22,359 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-20 12:05:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:05:23,578 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2020-07-20 12:05:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2020-07-20 12:05:23,580 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2020-07-20 12:05:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:05:23,584 INFO L225 Difference]: With dead ends: 218 [2020-07-20 12:05:23,585 INFO L226 Difference]: Without dead ends: 198 [2020-07-20 12:05:23,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12145 ImplicationChecksByTransitivity, 50.0s TimeCoverageRelationStatistics Valid=10004, Invalid=39502, Unknown=0, NotChecked=0, Total=49506 [2020-07-20 12:05:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-20 12:05:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-20 12:05:23,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 12:05:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-07-20 12:05:23,624 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 101 [2020-07-20 12:05:23,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:05:23,625 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-07-20 12:05:23,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-20 12:05:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-07-20 12:05:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-20 12:05:23,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:05:23,629 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:05:23,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:05:23,830 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:05:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:05:23,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1984747378, now seen corresponding path program 6 times [2020-07-20 12:05:23,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:05:23,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536028096] [2020-07-20 12:05:23,832 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 12:05:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:05:23,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 194 conjunts are in the unsatisfiable core [2020-07-20 12:05:23,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:05:37,018 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:05:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:05:37,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:05:38,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:05:39,696 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-20 12:06:29,927 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:32,484 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:34,816 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:36,162 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:45,659 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:47,216 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:48,450 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:49,700 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:51,424 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:52,743 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:54,081 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:55,772 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:57,169 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:06:58,558 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:07:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:07:02,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536028096] [2020-07-20 12:07:02,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:07:02,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-20 12:07:02,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492888804] [2020-07-20 12:07:02,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-20 12:07:02,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:07:02,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-20 12:07:02,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8621, Invalid=29991, Unknown=0, NotChecked=0, Total=38612 [2020-07-20 12:07:02,892 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 197 states. [2020-07-20 12:07:59,790 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-07-20 12:08:00,604 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-07-20 12:08:02,005 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 12:08:03,317 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-20 12:08:04,449 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-20 12:08:05,748 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-07-20 12:08:06,730 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-20 12:08:07,982 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 12:08:09,341 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-20 12:08:10,858 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-20 12:08:12,808 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:08:14,340 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:08:15,594 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:08:16,957 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:08:18,396 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:08:19,971 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:08:21,864 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 12:08:23,541 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:08:24,961 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:08:26,999 WARN L193 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:08:28,538 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:08:30,333 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 12:08:32,644 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-20 12:08:34,392 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 12:08:35,809 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-20 12:08:37,346 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:08:38,900 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:08:40,477 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:08:42,617 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:08:44,426 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:08:46,021 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:08:47,916 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:08:49,650 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:08:51,516 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:08:53,862 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:08:55,992 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:08:57,641 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:08:59,622 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:01,234 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:03,313 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:09:06,360 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:09:08,662 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:09:10,594 WARN L193 SmtUtils]: Spent 754.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:09:12,797 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:14,785 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:16,908 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:09:19,196 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:09:20,858 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:09:22,575 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:09:24,796 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:26,861 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:29,230 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:09:31,941 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:09:33,763 WARN L193 SmtUtils]: Spent 870.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:09:35,338 WARN L193 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:09:37,877 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:39,592 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:41,388 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:09:43,891 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:09:45,947 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:09:47,771 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:09:49,965 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:52,201 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:09:54,740 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:09:57,756 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:09:59,740 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:10:01,474 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:10:03,755 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:10:05,875 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:10:08,274 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:10:11,434 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:10:13,822 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:10:15,916 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:10:18,310 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:10:20,555 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:10:22,998 WARN L193 SmtUtils]: Spent 884.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:10:25,762 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:10:27,946 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:10:29,757 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:10:32,151 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:10:34,223 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:10:36,904 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:10:40,259 WARN L193 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:10:42,377 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:10:44,161 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:10:46,320 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:10:48,148 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:10:50,993 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:10:54,481 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:10:57,154 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:10:59,477 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:11:02,344 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:11:04,654 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:11:07,279 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:11:10,014 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:11:12,797 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:11:15,205 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:11:17,927 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:11:20,485 WARN L193 SmtUtils]: Spent 863.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:11:23,426 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:11:27,013 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:11:29,782 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:11:32,017 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:11:35,050 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:11:37,567 WARN L193 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:11:40,306 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:11:44,247 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:11:46,717 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:11:48,805 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:11:51,288 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:11:53,449 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:11:56,579 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:12:00,445 WARN L193 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:12:03,351 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:12:05,937 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:12:09,386 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:12:11,857 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:12:14,758 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:12:18,448 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:12:21,735 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:12:24,618 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:12:27,768 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:12:30,335 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:12:33,460 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:12:36,921 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:12:39,968 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:12:42,929 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:12:46,310 WARN L193 SmtUtils]: Spent 921.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:12:49,010 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:12:52,011 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:12:55,886 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:12:58,895 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:13:01,262 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:13:04,368 WARN L193 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:13:07,312 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:13:10,619 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:13:15,147 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:13:18,012 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:13:20,121 WARN L193 SmtUtils]: Spent 982.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:13:23,384 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:13:26,387 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:13:29,784 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:13:34,144 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:13:37,423 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:13:40,342 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:13:43,194 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:13:45,988 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:13:49,586 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:13:54,074 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:13:57,727 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:14:00,935 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:14:04,403 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:14:07,248 WARN L193 SmtUtils]: Spent 897.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:14:10,623 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:14:15,038 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:14:18,463 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:14:21,593 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:14:25,329 WARN L193 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:14:28,244 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:14:31,490 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:14:36,191 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-20 12:14:39,253 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-20 12:14:41,995 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:14:45,380 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:14:48,390 WARN L193 SmtUtils]: Spent 913.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 12:14:50,863 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:14:53,898 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 12:14:56,109 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:14:58,028 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-20 12:15:00,453 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 12:15:02,266 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-20 12:15:04,534 WARN L193 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:15:07,113 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-20 12:15:09,741 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 12:15:11,981 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-20 12:15:14,465 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:15:16,725 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-20 12:15:19,290 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-20 12:15:22,152 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-20 12:15:24,944 WARN L193 SmtUtils]: Spent 927.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-20 12:15:27,145 WARN L193 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-20 12:15:29,632 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-20 12:15:31,763 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-20 12:15:34,298 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-20 12:15:37,459 WARN L193 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-20 12:15:38,552 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 12:15:39,425 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 12:15:40,972 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 12:15:42,728 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-20 12:15:42,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:15:42,798 INFO L93 Difference]: Finished difference Result 426 states and 457 transitions. [2020-07-20 12:15:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2020-07-20 12:15:42,807 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 197 [2020-07-20 12:15:42,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:15:42,811 INFO L225 Difference]: With dead ends: 426 [2020-07-20 12:15:42,811 INFO L226 Difference]: Without dead ends: 390 [2020-07-20 12:15:42,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50369 ImplicationChecksByTransitivity, 548.6s TimeCoverageRelationStatistics Valid=40716, Invalid=158646, Unknown=0, NotChecked=0, Total=199362 [2020-07-20 12:15:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-07-20 12:15:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-07-20 12:15:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-07-20 12:15:42,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 390 transitions. [2020-07-20 12:15:42,895 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 390 transitions. Word has length 197 [2020-07-20 12:15:42,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:15:42,896 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 390 transitions. [2020-07-20 12:15:42,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 197 states. [2020-07-20 12:15:42,896 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 390 transitions. [2020-07-20 12:15:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-20 12:15:42,904 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:15:42,904 INFO L422 BasicCegarLoop]: trace histogram [126, 126, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:15:43,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:15:43,118 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:15:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:15:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash -354150478, now seen corresponding path program 7 times [2020-07-20 12:15:43,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:15:43,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089499482] [2020-07-20 12:15:43,120 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 12:15:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:15:43,320 WARN L261 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 386 conjunts are in the unsatisfiable core [2020-07-20 12:15:43,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:17:32,156 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:17:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 23751 backedges. 0 proven. 23751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:17:35,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:17:38,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:17:45,266 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-20 12:17:47,160 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 12:17:49,114 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 12:17:51,020 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 12:17:52,970 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 12:17:54,893 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 12:17:56,891 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 12:17:58,752 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 12:18:00,622 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:02,569 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:04,630 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:06,637 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:08,676 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:10,651 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:12,615 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:14,722 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:16,689 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:18,759 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 12:18:20,905 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 24