/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-lit/jm2006.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:54:02,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:54:02,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:54:02,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:54:02,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:54:02,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:54:02,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:54:02,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:54:02,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:54:02,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:54:02,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:54:02,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:54:02,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:54:02,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:54:02,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:54:02,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:54:02,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:54:02,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:54:02,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:54:03,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:54:03,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:54:03,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:54:03,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:54:03,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:54:03,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:54:03,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:54:03,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:54:03,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:54:03,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:54:03,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:54:03,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:54:03,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:54:03,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:54:03,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:54:03,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:54:03,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:54:03,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:54:03,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:54:03,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:54:03,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:54:03,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:54:03,039 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 [2020-07-21 11:54:03,063 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:54:03,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:54:03,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:54:03,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:54:03,065 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:54:03,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:54:03,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:54:03,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:54:03,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:54:03,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:54:03,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:54:03,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:54:03,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:54:03,067 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:54:03,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:54:03,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:54:03,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:54:03,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:54:03,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:54:03,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:54:03,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:54:03,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:54:03,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:54:03,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:54:03,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:54:03,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:54:03,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:03,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:54:03,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:54:03,071 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 [2020-07-21 11:54:03,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:54:03,407 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:54:03,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:54:03,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:54:03,414 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:54:03,415 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-21 11:54:03,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e03895d/ae07102a12d5468abbaa76c49450d42f/FLAG47d930c20 [2020-07-21 11:54:04,041 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:54:04,042 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-21 11:54:04,050 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e03895d/ae07102a12d5468abbaa76c49450d42f/FLAG47d930c20 [2020-07-21 11:54:04,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e03895d/ae07102a12d5468abbaa76c49450d42f [2020-07-21 11:54:04,361 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:54:04,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:54:04,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:54:04,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:54:04,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:54:04,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b27b408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04, skipping insertion in model container [2020-07-21 11:54:04,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:54:04,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:54:04,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:54:04,646 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:54:04,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:54:04,678 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:54:04,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04 WrapperNode [2020-07-21 11:54:04,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:54:04,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:54:04,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:54:04,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:54:04,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (1/1) ... [2020-07-21 11:54:04,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:54:04,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:54:04,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:54:04,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:54:04,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (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 [2020-07-21 11:54:04,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:54:04,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:54:04,885 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:54:04,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:54:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:54:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:54:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:54:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:54:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:54:04,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:54:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:54:04,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:54:05,120 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:54:05,121 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 11:54:05,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:54:05 BoogieIcfgContainer [2020-07-21 11:54:05,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:54:05,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:54:05,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:54:05,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:54:05,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:54:04" (1/3) ... [2020-07-21 11:54:05,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a63043f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:54:05, skipping insertion in model container [2020-07-21 11:54:05,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:54:04" (2/3) ... [2020-07-21 11:54:05,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a63043f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:54:05, skipping insertion in model container [2020-07-21 11:54:05,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:54:05" (3/3) ... [2020-07-21 11:54:05,137 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.c.i.v+cfa-reducer.c [2020-07-21 11:54:05,151 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:54:05,161 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:54:05,182 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:54:05,221 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:54:05,221 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:54:05,222 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:54:05,222 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:54:05,225 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:54:05,225 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:54:05,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:54:05,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:54:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 11:54:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 11:54:05,279 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:05,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:05,282 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:05,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1434042835, now seen corresponding path program 1 times [2020-07-21 11:54:05,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:05,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168593955] [2020-07-21 11:54:05,305 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 [2020-07-21 11:54:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:05,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 11:54:05,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:05,530 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:54:05,537 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:54:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:05,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:54:05,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168593955] [2020-07-21 11:54:05,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:54:05,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 11:54:05,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752738768] [2020-07-21 11:54:05,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 11:54:05,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:05,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 11:54:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 11:54:05,596 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-07-21 11:54:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:05,743 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-21 11:54:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 11:54:05,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-21 11:54:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:05,758 INFO L225 Difference]: With dead ends: 30 [2020-07-21 11:54:05,759 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 11:54:05,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:54:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 11:54:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 11:54:05,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 11:54:05,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 11:54:05,814 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 11:54:05,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:05,814 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 11:54:05,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 11:54:05,815 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 11:54:05,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 11:54:05,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:05,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:06,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:06,032 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1507594220, now seen corresponding path program 1 times [2020-07-21 11:54:06,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:06,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854597087] [2020-07-21 11:54:06,035 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 [2020-07-21 11:54:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:06,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 11:54:06,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:06,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:06,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:06,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854597087] [2020-07-21 11:54:06,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:06,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-21 11:54:06,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395966742] [2020-07-21 11:54:06,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 11:54:06,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:06,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 11:54:06,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:54:06,253 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2020-07-21 11:54:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:06,491 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-21 11:54:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 11:54:06,492 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-07-21 11:54:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:06,493 INFO L225 Difference]: With dead ends: 23 [2020-07-21 11:54:06,493 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 11:54:06,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-21 11:54:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 11:54:06,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 11:54:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 11:54:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 11:54:06,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-21 11:54:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:06,502 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 11:54:06,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 11:54:06,503 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 11:54:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:54:06,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:06,504 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:06,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:06,720 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2102853613, now seen corresponding path program 2 times [2020-07-21 11:54:06,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:06,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701741984] [2020-07-21 11:54:06,724 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 [2020-07-21 11:54:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:06,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 11:54:06,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:06,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:06,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:07,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701741984] [2020-07-21 11:54:07,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:07,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 11:54:07,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826128168] [2020-07-21 11:54:07,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 11:54:07,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 11:54:07,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-07-21 11:54:07,099 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 15 states. [2020-07-21 11:54:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:07,715 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 11:54:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 11:54:07,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2020-07-21 11:54:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:07,718 INFO L225 Difference]: With dead ends: 29 [2020-07-21 11:54:07,718 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 11:54:07,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-07-21 11:54:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 11:54:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 11:54:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 11:54:07,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 11:54:07,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-21 11:54:07,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:07,736 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 11:54:07,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 11:54:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 11:54:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:54:07,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:07,738 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:07,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:07,954 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:07,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:07,955 INFO L82 PathProgramCache]: Analyzing trace with hash 906772109, now seen corresponding path program 3 times [2020-07-21 11:54:07,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:07,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108997810] [2020-07-21 11:54:07,956 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 [2020-07-21 11:54:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 11:54:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:08,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:08,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:08,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108997810] [2020-07-21 11:54:08,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:08,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-07-21 11:54:08,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918962516] [2020-07-21 11:54:08,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 11:54:08,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 11:54:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2020-07-21 11:54:08,799 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 27 states. [2020-07-21 11:54:09,473 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-21 11:54:09,785 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-21 11:54:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:10,600 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 11:54:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 11:54:10,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 22 [2020-07-21 11:54:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:10,604 INFO L225 Difference]: With dead ends: 41 [2020-07-21 11:54:10,608 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 11:54:10,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=550, Invalid=1172, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 11:54:10,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 11:54:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 11:54:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 11:54:10,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-21 11:54:10,621 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-21 11:54:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:10,622 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-21 11:54:10,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 11:54:10,622 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-21 11:54:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 11:54:10,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:10,624 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:10,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:10,838 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:10,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:10,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1007922227, now seen corresponding path program 4 times [2020-07-21 11:54:10,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:10,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725609320] [2020-07-21 11:54:10,840 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 [2020-07-21 11:54:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:10,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-21 11:54:10,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:11,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:11,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:13,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725609320] [2020-07-21 11:54:13,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:13,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2020-07-21 11:54:13,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006754606] [2020-07-21 11:54:13,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-21 11:54:13,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:13,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-21 11:54:13,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 11:54:13,199 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 51 states. [2020-07-21 11:54:14,141 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 11:54:14,559 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 11:54:14,938 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-21 11:54:15,320 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 11:54:15,703 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 100 [2020-07-21 11:54:16,014 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 11:54:16,322 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 11:54:16,651 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 11:54:16,939 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 11:54:17,236 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 11:54:17,538 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 11:54:17,798 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 11:54:20,445 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 11:54:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:54:20,460 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-21 11:54:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-21 11:54:20,462 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 34 [2020-07-21 11:54:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:54:20,464 INFO L225 Difference]: With dead ends: 65 [2020-07-21 11:54:20,464 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 11:54:20,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1942, Invalid=4064, Unknown=0, NotChecked=0, Total=6006 [2020-07-21 11:54:20,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 11:54:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 11:54:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 11:54:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-21 11:54:20,484 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-21 11:54:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:54:20,484 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-21 11:54:20,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-21 11:54:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-21 11:54:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 11:54:20,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:54:20,487 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:54:20,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:54:20,703 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:54:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:54:20,704 INFO L82 PathProgramCache]: Analyzing trace with hash -765796787, now seen corresponding path program 5 times [2020-07-21 11:54:20,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:54:20,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749663940] [2020-07-21 11:54:20,705 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 [2020-07-21 11:54:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:54:20,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-21 11:54:20,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:54:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:23,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:54:23,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:54:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:54:29,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749663940] [2020-07-21 11:54:29,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:54:29,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 99 [2020-07-21 11:54:29,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104486399] [2020-07-21 11:54:29,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-21 11:54:29,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:54:29,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-21 11:54:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2407, Invalid=7295, Unknown=0, NotChecked=0, Total=9702 [2020-07-21 11:54:29,184 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 99 states. [2020-07-21 11:54:32,720 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 11:54:34,142 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 11:54:35,128 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-21 11:54:36,520 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 11:54:37,638 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 196 [2020-07-21 11:54:38,937 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-21 11:54:40,214 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-21 11:54:41,492 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-21 11:54:42,776 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-21 11:54:44,033 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-21 11:54:45,270 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-21 11:54:46,429 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-21 11:54:47,622 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 11:54:48,776 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 11:54:49,882 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-21 11:54:50,952 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 11:54:52,022 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 11:54:53,051 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 11:54:54,094 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 11:54:55,087 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 11:54:56,043 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 11:54:56,992 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 11:54:57,901 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 11:54:58,812 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 11:54:59,701 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 11:55:00,549 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-21 11:55:01,386 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 11:55:02,211 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 11:55:03,004 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 11:55:03,771 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 11:55:04,512 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 11:55:05,245 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 11:55:05,938 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 11:55:06,597 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 11:55:07,244 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 11:55:07,856 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 11:55:08,451 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 11:55:09,012 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 11:55:14,652 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 11:55:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:55:14,671 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2020-07-21 11:55:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-21 11:55:14,673 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 58 [2020-07-21 11:55:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:55:14,674 INFO L225 Difference]: With dead ends: 113 [2020-07-21 11:55:14,675 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 11:55:14,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=7318, Invalid=15032, Unknown=0, NotChecked=0, Total=22350 [2020-07-21 11:55:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 11:55:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 11:55:14,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 11:55:14,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-21 11:55:14,707 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-21 11:55:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:55:14,708 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-21 11:55:14,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-21 11:55:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-21 11:55:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 11:55:14,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:14,711 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:14,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:14,913 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1152480077, now seen corresponding path program 6 times [2020-07-21 11:55:14,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:14,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586664397] [2020-07-21 11:55:14,915 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 [2020-07-21 11:55:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-21 11:55:15,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:24,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:55:24,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:55:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:54,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586664397] [2020-07-21 11:55:54,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:55:54,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 195 [2020-07-21 11:55:54,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332074559] [2020-07-21 11:55:54,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 195 states [2020-07-21 11:55:54,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:55:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2020-07-21 11:55:54,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9415, Invalid=28415, Unknown=0, NotChecked=0, Total=37830 [2020-07-21 11:55:54,643 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 195 states. [2020-07-21 11:56:14,788 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-21 11:56:23,781 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-21 11:56:27,298 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-21 11:56:37,370 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-21 11:56:41,295 WARN L193 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 482 DAG size of output: 388 [2020-07-21 11:56:52,315 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-21 11:57:04,692 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-21 11:57:17,073 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-21 11:57:29,861 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-21 11:57:45,368 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-21 11:58:00,932 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-21 11:58:15,725 WARN L193 SmtUtils]: Spent 2.54 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-21 11:58:31,610 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-21 11:58:46,199 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-21 11:59:01,183 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-21 11:59:17,026 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-21 11:59:33,508 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-21 11:59:51,276 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-21 12:00:08,843 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-21 12:00:27,999 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-21 12:00:48,072 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-21 12:01:09,562 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-21 12:01:32,721 WARN L193 SmtUtils]: Spent 3.37 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-21 12:01:56,236 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-21 12:02:17,405 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-21 12:02:39,800 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-21 12:03:02,690 WARN L193 SmtUtils]: Spent 3.48 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-21 12:03:27,901 WARN L193 SmtUtils]: Spent 3.62 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-21 12:03:53,893 WARN L193 SmtUtils]: Spent 3.72 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-21 12:04:17,653 WARN L193 SmtUtils]: Spent 3.28 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-21 12:04:41,342 WARN L193 SmtUtils]: Spent 3.66 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-21 12:05:07,123 WARN L193 SmtUtils]: Spent 3.42 s on a formula simplification that was a NOOP. DAG size: 337 [2020-07-21 12:05:30,407 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 332 [2020-07-21 12:05:51,439 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 327 [2020-07-21 12:06:09,392 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification that was a NOOP. DAG size: 322 [2020-07-21 12:06:27,332 WARN L193 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 317 [2020-07-21 12:06:45,519 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification that was a NOOP. DAG size: 312 [2020-07-21 12:07:03,910 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification that was a NOOP. DAG size: 307 [2020-07-21 12:07:22,251 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-21 12:07:40,783 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 297 [2020-07-21 12:07:57,725 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 292 [2020-07-21 12:08:14,716 WARN L193 SmtUtils]: Spent 2.52 s on a formula simplification that was a NOOP. DAG size: 287