/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:01:18,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:01:18,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:01:18,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:01:18,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:01:18,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:01:18,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:01:18,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:01:18,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:01:18,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:01:18,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:01:18,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:01:18,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:01:18,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:01:18,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:01:18,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:01:18,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:01:18,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:01:18,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:01:18,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:01:18,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:01:18,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:01:18,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:01:18,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:01:18,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:01:18,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:01:18,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:01:18,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:01:18,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:01:18,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:01:18,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:01:18,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:01:18,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:01:18,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:01:18,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:01:18,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:01:18,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:01:18,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:01:18,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:01:18,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:01:18,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:01:18,448 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 16:01:18,464 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:01:18,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:01:18,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:01:18,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:01:18,466 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:01:18,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:01:18,466 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:01:18,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:01:18,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:01:18,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:01:18,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:01:18,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:01:18,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:01:18,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:01:18,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:01:18,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:01:18,468 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:01:18,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:01:18,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:01:18,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:01:18,469 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:01:18,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:01:18,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:01:18,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:01:18,470 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:01:18,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:01:18,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:18,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:01:18,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:01:18,471 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:01:18,784 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:01:18,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:01:18,803 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:01:18,805 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:01:18,805 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:01:18,806 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-21 16:01:18,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56a866147/f91ce43df59342ff8b17efff4ef0b1b5/FLAGd1479d067 [2020-07-21 16:01:19,417 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:01:19,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-21 16:01:19,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56a866147/f91ce43df59342ff8b17efff4ef0b1b5/FLAGd1479d067 [2020-07-21 16:01:19,750 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56a866147/f91ce43df59342ff8b17efff4ef0b1b5 [2020-07-21 16:01:19,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:01:19,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:01:19,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:01:19,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:01:19,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:01:19,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:01:19" (1/1) ... [2020-07-21 16:01:19,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a47b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:19, skipping insertion in model container [2020-07-21 16:01:19,774 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:01:19" (1/1) ... [2020-07-21 16:01:19,782 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:01:19,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:01:20,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:01:20,086 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:01:20,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:01:20,129 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:01:20,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20 WrapperNode [2020-07-21 16:01:20,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:01:20,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:01:20,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:01:20,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:01:20,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20" (1/1) ... [2020-07-21 16:01:20,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20" (1/1) ... [2020-07-21 16:01:20,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20" (1/1) ... [2020-07-21 16:01:20,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20" (1/1) ... [2020-07-21 16:01:20,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20" (1/1) ... [2020-07-21 16:01:20,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20" (1/1) ... [2020-07-21 16:01:20,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20" (1/1) ... [2020-07-21 16:01:20,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:01:20,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:01:20,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:01:20,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:01:20,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20" (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 16:01:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:01:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:01:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 16:01:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 16:01:20,428 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:01:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:01:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:01:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 16:01:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 16:01:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:01:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:01:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:01:20,639 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:01:20,640 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 16:01:20,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:01:20 BoogieIcfgContainer [2020-07-21 16:01:20,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:01:20,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:01:20,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:01:20,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:01:20,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:01:19" (1/3) ... [2020-07-21 16:01:20,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714b7937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:01:20, skipping insertion in model container [2020-07-21 16:01:20,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:01:20" (2/3) ... [2020-07-21 16:01:20,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@714b7937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:01:20, skipping insertion in model container [2020-07-21 16:01:20,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:01:20" (3/3) ... [2020-07-21 16:01:20,654 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-07-21 16:01:20,681 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:01:20,699 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:01:20,735 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:01:20,776 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:01:20,776 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:01:20,777 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:01:20,777 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:01:20,777 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:01:20,778 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:01:20,778 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:01:20,778 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:01:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 16:01:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:01:20,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:20,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:20,814 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:20,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:20,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 16:01:20,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:20,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349619446] [2020-07-21 16:01:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:01:20,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:20,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:20,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:01:20,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:21,021 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 16:01:21,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:01:21,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349619446] [2020-07-21 16:01:21,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:01:21,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:01:21,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463197657] [2020-07-21 16:01:21,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:01:21,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:01:21,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:01:21,049 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 16:01:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:21,177 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 16:01:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:01:21,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 16:01:21,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:21,191 INFO L225 Difference]: With dead ends: 44 [2020-07-21 16:01:21,192 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 16:01:21,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:01:21,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 16:01:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 16:01:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 16:01:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 16:01:21,251 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 16:01:21,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:21,252 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 16:01:21,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:01:21,252 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 16:01:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 16:01:21,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:21,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:21,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:21,471 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 16:01:21,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:21,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017912543] [2020-07-21 16:01:21,474 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:01:21,505 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:21,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:21,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:01:21,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:21,560 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 16:01:21,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:01:21,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017912543] [2020-07-21 16:01:21,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:01:21,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:01:21,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959768653] [2020-07-21 16:01:21,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:01:21,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:21,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:01:21,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:01:21,568 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 16:01:21,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:21,639 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 16:01:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:01:21,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 16:01:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:21,642 INFO L225 Difference]: With dead ends: 36 [2020-07-21 16:01:21,642 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 16:01:21,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:01:21,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 16:01:21,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 16:01:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 16:01:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 16:01:21,655 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 16:01:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:21,656 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 16:01:21,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:01:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 16:01:21,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 16:01:21,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:21,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:21,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:21,874 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 16:01:21,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:21,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367150694] [2020-07-21 16:01:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:01:21,912 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:21,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:21,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:01:21,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:01:22,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:22,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:22,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:01:22,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367150694] [2020-07-21 16:01:22,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:22,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 16:01:22,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221274319] [2020-07-21 16:01:22,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 16:01:22,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:22,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 16:01:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:01:22,321 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 16:01:22,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:22,502 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 16:01:22,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:01:22,503 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 16:01:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:22,505 INFO L225 Difference]: With dead ends: 41 [2020-07-21 16:01:22,505 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 16:01:22,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:01:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 16:01:22,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 16:01:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 16:01:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 16:01:22,517 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 16:01:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:22,517 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 16:01:22,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 16:01:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 16:01:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 16:01:22,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:22,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:22,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:22,723 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:22,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:22,724 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 16:01:22,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:22,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259172916] [2020-07-21 16:01:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:01:22,758 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:22,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:22,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:01:22,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:01:22,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:22,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:22,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 16:01:22,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259172916] [2020-07-21 16:01:22,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:22,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 16:01:22,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661370195] [2020-07-21 16:01:22,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 16:01:23,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 16:01:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:01:23,001 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 16:01:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:23,143 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 16:01:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:01:23,144 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 16:01:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:23,149 INFO L225 Difference]: With dead ends: 46 [2020-07-21 16:01:23,149 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 16:01:23,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:01:23,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 16:01:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 16:01:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 16:01:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 16:01:23,169 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 16:01:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:23,169 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 16:01:23,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 16:01:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 16:01:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 16:01:23,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:23,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:23,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:23,387 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 16:01:23,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:23,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904062298] [2020-07-21 16:01:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:01:23,433 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:23,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:23,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:01:23,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 16:01:23,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:23,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:23,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:23,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 16:01:23,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904062298] [2020-07-21 16:01:23,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:23,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 16:01:23,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516222361] [2020-07-21 16:01:23,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:01:23,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:23,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:01:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:01:23,905 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 16:01:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:24,107 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 16:01:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:01:24,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 16:01:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:24,110 INFO L225 Difference]: With dead ends: 51 [2020-07-21 16:01:24,110 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 16:01:24,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:01:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 16:01:24,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 16:01:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 16:01:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 16:01:24,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 16:01:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:24,123 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 16:01:24,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:01:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 16:01:24,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 16:01:24,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:24,125 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:24,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:24,340 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:24,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:24,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 16:01:24,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:24,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511672933] [2020-07-21 16:01:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:01:24,369 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:24,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:01:24,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 16:01:24,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:24,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:24,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:24,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 16:01:24,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511672933] [2020-07-21 16:01:24,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:24,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 16:01:24,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156517264] [2020-07-21 16:01:24,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:01:24,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:24,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:01:24,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:01:24,755 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 16:01:25,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:25,083 INFO L93 Difference]: Finished difference Result 84 states and 136 transitions. [2020-07-21 16:01:25,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:01:25,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 16:01:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:25,088 INFO L225 Difference]: With dead ends: 84 [2020-07-21 16:01:25,089 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 16:01:25,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:01:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 16:01:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-07-21 16:01:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-21 16:01:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2020-07-21 16:01:25,123 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 40 [2020-07-21 16:01:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:25,124 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2020-07-21 16:01:25,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:01:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2020-07-21 16:01:25,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 16:01:25,130 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:25,130 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:25,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:25,351 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:25,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:25,352 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-07-21 16:01:25,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:25,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962616880] [2020-07-21 16:01:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 16:01:25,414 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:25,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:25,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:01:25,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 16:01:25,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:25,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:25,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 16:01:25,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962616880] [2020-07-21 16:01:25,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:25,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 16:01:25,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782991765] [2020-07-21 16:01:25,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:01:25,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:25,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:01:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:01:25,792 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand 12 states. [2020-07-21 16:01:25,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:25,945 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-07-21 16:01:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:01:25,946 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-07-21 16:01:25,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:25,949 INFO L225 Difference]: With dead ends: 63 [2020-07-21 16:01:25,949 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 16:01:25,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:01:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 16:01:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-07-21 16:01:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 16:01:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 77 transitions. [2020-07-21 16:01:25,963 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 77 transitions. Word has length 41 [2020-07-21 16:01:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:25,963 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 77 transitions. [2020-07-21 16:01:25,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:01:25,964 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 77 transitions. [2020-07-21 16:01:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 16:01:25,966 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:25,967 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:26,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:26,182 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:26,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:26,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1291563674, now seen corresponding path program 1 times [2020-07-21 16:01:26,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:26,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352844383] [2020-07-21 16:01:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:01:26,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:26,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:26,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 16:01:26,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 16:01:26,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:26,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:26,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 16:01:26,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352844383] [2020-07-21 16:01:26,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:26,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 16:01:26,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795855694] [2020-07-21 16:01:26,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 16:01:26,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 16:01:26,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:01:26,528 INFO L87 Difference]: Start difference. First operand 51 states and 77 transitions. Second operand 10 states. [2020-07-21 16:01:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:26,673 INFO L93 Difference]: Finished difference Result 65 states and 105 transitions. [2020-07-21 16:01:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:01:26,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-07-21 16:01:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:26,675 INFO L225 Difference]: With dead ends: 65 [2020-07-21 16:01:26,675 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 16:01:26,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:01:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 16:01:26,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2020-07-21 16:01:26,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-21 16:01:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 82 transitions. [2020-07-21 16:01:26,689 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 82 transitions. Word has length 53 [2020-07-21 16:01:26,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:26,690 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 82 transitions. [2020-07-21 16:01:26,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 16:01:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 82 transitions. [2020-07-21 16:01:26,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 16:01:26,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:26,692 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:26,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:26,904 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:26,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:26,904 INFO L82 PathProgramCache]: Analyzing trace with hash 736840020, now seen corresponding path program 2 times [2020-07-21 16:01:26,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:26,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443498715] [2020-07-21 16:01:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:01:26,957 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:26,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:26,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 16:01:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 16:01:27,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:27,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-07-21 16:01:27,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443498715] [2020-07-21 16:01:27,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:27,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 16:01:27,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360390237] [2020-07-21 16:01:27,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 16:01:27,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:27,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 16:01:27,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:01:27,648 INFO L87 Difference]: Start difference. First operand 53 states and 82 transitions. Second operand 14 states. [2020-07-21 16:01:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:27,848 INFO L93 Difference]: Finished difference Result 75 states and 134 transitions. [2020-07-21 16:01:27,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:01:27,849 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 78 [2020-07-21 16:01:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:27,851 INFO L225 Difference]: With dead ends: 75 [2020-07-21 16:01:27,851 INFO L226 Difference]: Without dead ends: 71 [2020-07-21 16:01:27,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 137 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:01:27,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-07-21 16:01:27,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-07-21 16:01:27,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 16:01:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 90 transitions. [2020-07-21 16:01:27,865 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 90 transitions. Word has length 78 [2020-07-21 16:01:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:27,865 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 90 transitions. [2020-07-21 16:01:27,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 16:01:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 90 transitions. [2020-07-21 16:01:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 16:01:27,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:27,868 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:28,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:28,082 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:28,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1583364703, now seen corresponding path program 1 times [2020-07-21 16:01:28,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:28,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311940447] [2020-07-21 16:01:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 16:01:28,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:28,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:28,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:01:28,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 16:01:28,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:28,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:28,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-21 16:01:28,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311940447] [2020-07-21 16:01:28,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:28,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2020-07-21 16:01:28,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064826348] [2020-07-21 16:01:28,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:01:28,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:28,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:01:28,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:01:28,569 INFO L87 Difference]: Start difference. First operand 56 states and 90 transitions. Second operand 12 states. [2020-07-21 16:01:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:28,776 INFO L93 Difference]: Finished difference Result 114 states and 219 transitions. [2020-07-21 16:01:28,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:01:28,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-07-21 16:01:28,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:28,780 INFO L225 Difference]: With dead ends: 114 [2020-07-21 16:01:28,780 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 16:01:28,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:01:28,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 16:01:28,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-07-21 16:01:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 16:01:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 101 transitions. [2020-07-21 16:01:28,807 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 101 transitions. Word has length 67 [2020-07-21 16:01:28,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:28,809 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 101 transitions. [2020-07-21 16:01:28,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:01:28,809 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 101 transitions. [2020-07-21 16:01:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 16:01:28,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:28,811 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:29,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:29,013 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1763147687, now seen corresponding path program 2 times [2020-07-21 16:01:29,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:29,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318278052] [2020-07-21 16:01:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:29,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:29,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:01:29,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-21 16:01:29,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:29,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:29,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:29,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:29,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-07-21 16:01:29,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318278052] [2020-07-21 16:01:29,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:29,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2020-07-21 16:01:29,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535405411] [2020-07-21 16:01:29,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:01:29,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:29,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:01:29,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:01:29,863 INFO L87 Difference]: Start difference. First operand 61 states and 101 transitions. Second operand 17 states. [2020-07-21 16:01:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:30,301 INFO L93 Difference]: Finished difference Result 131 states and 252 transitions. [2020-07-21 16:01:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:01:30,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-07-21 16:01:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:30,305 INFO L225 Difference]: With dead ends: 131 [2020-07-21 16:01:30,306 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 16:01:30,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 116 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-07-21 16:01:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 16:01:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2020-07-21 16:01:30,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-21 16:01:30,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 106 transitions. [2020-07-21 16:01:30,319 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 106 transitions. Word has length 68 [2020-07-21 16:01:30,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:30,320 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 106 transitions. [2020-07-21 16:01:30,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:01:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 106 transitions. [2020-07-21 16:01:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 16:01:30,322 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:30,322 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:30,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:30,528 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:30,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:30,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1986769418, now seen corresponding path program 1 times [2020-07-21 16:01:30,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:30,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295018713] [2020-07-21 16:01:30,530 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:30,595 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:30,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:01:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 39 proven. 53 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 16:01:30,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:31,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 39 proven. 57 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-21 16:01:31,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295018713] [2020-07-21 16:01:31,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:31,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2020-07-21 16:01:31,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231334411] [2020-07-21 16:01:31,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 16:01:31,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:31,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 16:01:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:01:31,573 INFO L87 Difference]: Start difference. First operand 68 states and 106 transitions. Second operand 21 states. [2020-07-21 16:01:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:32,446 INFO L93 Difference]: Finished difference Result 186 states and 366 transitions. [2020-07-21 16:01:32,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 16:01:32,447 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2020-07-21 16:01:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:32,452 INFO L225 Difference]: With dead ends: 186 [2020-07-21 16:01:32,453 INFO L226 Difference]: Without dead ends: 124 [2020-07-21 16:01:32,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 145 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 16:01:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-21 16:01:32,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-07-21 16:01:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-07-21 16:01:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 179 transitions. [2020-07-21 16:01:32,502 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 179 transitions. Word has length 82 [2020-07-21 16:01:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:32,502 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 179 transitions. [2020-07-21 16:01:32,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 16:01:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 179 transitions. [2020-07-21 16:01:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 16:01:32,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:32,504 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:32,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:32,707 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:32,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 3 times [2020-07-21 16:01:32,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:32,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523487380] [2020-07-21 16:01:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:32,775 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:32,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:32,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 16:01:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-07-21 16:01:32,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:33,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:33,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:33,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:33,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-07-21 16:01:33,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523487380] [2020-07-21 16:01:33,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:33,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 16:01:33,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779882357] [2020-07-21 16:01:33,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 16:01:33,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:33,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 16:01:33,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:01:33,383 INFO L87 Difference]: Start difference. First operand 110 states and 179 transitions. Second operand 14 states. [2020-07-21 16:01:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:33,588 INFO L93 Difference]: Finished difference Result 114 states and 182 transitions. [2020-07-21 16:01:33,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:01:33,589 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-07-21 16:01:33,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:33,591 INFO L225 Difference]: With dead ends: 114 [2020-07-21 16:01:33,591 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 16:01:33,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:01:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 16:01:33,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2020-07-21 16:01:33,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 16:01:33,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 159 transitions. [2020-07-21 16:01:33,611 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 159 transitions. Word has length 68 [2020-07-21 16:01:33,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:33,611 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 159 transitions. [2020-07-21 16:01:33,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 16:01:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 159 transitions. [2020-07-21 16:01:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 16:01:33,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:33,614 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:33,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:33,825 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:33,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash 918304791, now seen corresponding path program 4 times [2020-07-21 16:01:33,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:33,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498476581] [2020-07-21 16:01:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:33,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:33,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:33,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:01:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 33 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-07-21 16:01:33,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:34,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:34,735 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 78 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-21 16:01:34,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498476581] [2020-07-21 16:01:34,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:34,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2020-07-21 16:01:34,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992524078] [2020-07-21 16:01:34,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 16:01:34,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:34,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 16:01:34,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2020-07-21 16:01:34,741 INFO L87 Difference]: Start difference. First operand 102 states and 159 transitions. Second operand 19 states. [2020-07-21 16:01:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:35,268 INFO L93 Difference]: Finished difference Result 269 states and 520 transitions. [2020-07-21 16:01:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 16:01:35,269 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-07-21 16:01:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:35,272 INFO L225 Difference]: With dead ends: 269 [2020-07-21 16:01:35,273 INFO L226 Difference]: Without dead ends: 168 [2020-07-21 16:01:35,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2020-07-21 16:01:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-21 16:01:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 144. [2020-07-21 16:01:35,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-21 16:01:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 247 transitions. [2020-07-21 16:01:35,297 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 247 transitions. Word has length 94 [2020-07-21 16:01:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:35,299 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 247 transitions. [2020-07-21 16:01:35,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 16:01:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 247 transitions. [2020-07-21 16:01:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-21 16:01:35,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:35,302 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:35,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:35,518 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:35,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1676117994, now seen corresponding path program 2 times [2020-07-21 16:01:35,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:35,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75342692] [2020-07-21 16:01:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:35,627 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:35,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:01:35,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:35,687 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 16:01:35,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:35,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:36,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:36,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:36,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-21 16:01:36,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75342692] [2020-07-21 16:01:36,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:36,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 16:01:36,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962459936] [2020-07-21 16:01:36,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:01:36,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:36,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:01:36,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:01:36,142 INFO L87 Difference]: Start difference. First operand 144 states and 247 transitions. Second operand 12 states. [2020-07-21 16:01:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:36,306 INFO L93 Difference]: Finished difference Result 167 states and 289 transitions. [2020-07-21 16:01:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:01:36,306 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-07-21 16:01:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:36,309 INFO L225 Difference]: With dead ends: 167 [2020-07-21 16:01:36,309 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 16:01:36,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:01:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 16:01:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-07-21 16:01:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-07-21 16:01:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 272 transitions. [2020-07-21 16:01:36,324 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 272 transitions. Word has length 80 [2020-07-21 16:01:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:36,325 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 272 transitions. [2020-07-21 16:01:36,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:01:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 272 transitions. [2020-07-21 16:01:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-21 16:01:36,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:36,328 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:36,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:36,537 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:36,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:36,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2019487259, now seen corresponding path program 3 times [2020-07-21 16:01:36,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:36,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971552087] [2020-07-21 16:01:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:36,606 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:01:36,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:36,708 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 177 proven. 90 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-07-21 16:01:36,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:37,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:37,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:37,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:37,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:37,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 71 proven. 141 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-07-21 16:01:37,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971552087] [2020-07-21 16:01:37,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:37,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 21 [2020-07-21 16:01:37,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919117421] [2020-07-21 16:01:37,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 16:01:37,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:37,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 16:01:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:01:37,903 INFO L87 Difference]: Start difference. First operand 157 states and 272 transitions. Second operand 21 states. [2020-07-21 16:01:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:38,465 INFO L93 Difference]: Finished difference Result 369 states and 701 transitions. [2020-07-21 16:01:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 16:01:38,466 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2020-07-21 16:01:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:38,470 INFO L225 Difference]: With dead ends: 369 [2020-07-21 16:01:38,471 INFO L226 Difference]: Without dead ends: 218 [2020-07-21 16:01:38,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 213 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:01:38,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-21 16:01:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 173. [2020-07-21 16:01:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 16:01:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 306 transitions. [2020-07-21 16:01:38,493 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 306 transitions. Word has length 120 [2020-07-21 16:01:38,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:38,494 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 306 transitions. [2020-07-21 16:01:38,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 16:01:38,494 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 306 transitions. [2020-07-21 16:01:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-07-21 16:01:38,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:38,497 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:38,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:38,711 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:38,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:38,712 INFO L82 PathProgramCache]: Analyzing trace with hash -923530611, now seen corresponding path program 4 times [2020-07-21 16:01:38,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:38,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633908899] [2020-07-21 16:01:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:38,793 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:38,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:38,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:01:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-21 16:01:38,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:39,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:39,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:39,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:39,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 55 proven. 16 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2020-07-21 16:01:39,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633908899] [2020-07-21 16:01:39,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:39,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 16:01:39,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127427847] [2020-07-21 16:01:39,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:01:39,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:39,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:01:39,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:01:39,280 INFO L87 Difference]: Start difference. First operand 173 states and 306 transitions. Second operand 12 states. [2020-07-21 16:01:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:39,433 INFO L93 Difference]: Finished difference Result 191 states and 349 transitions. [2020-07-21 16:01:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:01:39,433 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 92 [2020-07-21 16:01:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:39,437 INFO L225 Difference]: With dead ends: 191 [2020-07-21 16:01:39,438 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 16:01:39,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:01:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 16:01:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 176. [2020-07-21 16:01:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-21 16:01:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 316 transitions. [2020-07-21 16:01:39,455 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 316 transitions. Word has length 92 [2020-07-21 16:01:39,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:39,456 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 316 transitions. [2020-07-21 16:01:39,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:01:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 316 transitions. [2020-07-21 16:01:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-07-21 16:01:39,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:39,459 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:39,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:39,675 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:39,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1156827333, now seen corresponding path program 2 times [2020-07-21 16:01:39,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:39,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265443576] [2020-07-21 16:01:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:39,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:39,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:39,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:01:39,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 21 proven. 119 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-07-21 16:01:39,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:40,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:40,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:40,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:40,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:40,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 21 proven. 127 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2020-07-21 16:01:40,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265443576] [2020-07-21 16:01:40,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:40,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:01:40,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390723014] [2020-07-21 16:01:40,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:01:40,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:40,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:01:40,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:01:40,805 INFO L87 Difference]: Start difference. First operand 176 states and 316 transitions. Second operand 16 states. [2020-07-21 16:01:41,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:41,043 INFO L93 Difference]: Finished difference Result 206 states and 384 transitions. [2020-07-21 16:01:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:01:41,044 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 118 [2020-07-21 16:01:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:41,047 INFO L225 Difference]: With dead ends: 206 [2020-07-21 16:01:41,047 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 16:01:41,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 212 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:01:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 16:01:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 186. [2020-07-21 16:01:41,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-21 16:01:41,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 342 transitions. [2020-07-21 16:01:41,066 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 342 transitions. Word has length 118 [2020-07-21 16:01:41,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:41,067 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 342 transitions. [2020-07-21 16:01:41,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:01:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 342 transitions. [2020-07-21 16:01:41,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-21 16:01:41,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:41,070 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:41,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:41,284 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:41,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:41,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1781345224, now seen corresponding path program 5 times [2020-07-21 16:01:41,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:41,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184650126] [2020-07-21 16:01:41,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:41,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:41,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:41,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:01:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 359 proven. 31 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2020-07-21 16:01:41,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:42,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:42,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:42,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:42,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:42,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 60 proven. 213 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2020-07-21 16:01:42,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184650126] [2020-07-21 16:01:42,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:42,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2020-07-21 16:01:42,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899296850] [2020-07-21 16:01:42,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:01:42,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:42,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:01:42,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:01:42,625 INFO L87 Difference]: Start difference. First operand 186 states and 342 transitions. Second operand 17 states. [2020-07-21 16:01:43,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:43,014 INFO L93 Difference]: Finished difference Result 376 states and 717 transitions. [2020-07-21 16:01:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:01:43,015 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 161 [2020-07-21 16:01:43,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:43,018 INFO L225 Difference]: With dead ends: 376 [2020-07-21 16:01:43,018 INFO L226 Difference]: Without dead ends: 192 [2020-07-21 16:01:43,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 295 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2020-07-21 16:01:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-21 16:01:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2020-07-21 16:01:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-21 16:01:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 336 transitions. [2020-07-21 16:01:43,037 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 336 transitions. Word has length 161 [2020-07-21 16:01:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:43,037 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 336 transitions. [2020-07-21 16:01:43,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:01:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 336 transitions. [2020-07-21 16:01:43,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 16:01:43,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:43,041 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:43,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:43,255 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:43,255 INFO L82 PathProgramCache]: Analyzing trace with hash -77183713, now seen corresponding path program 6 times [2020-07-21 16:01:43,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:43,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737482259] [2020-07-21 16:01:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:43,353 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:43,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:01:43,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 21 proven. 126 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2020-07-21 16:01:43,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:44,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:44,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:44,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:44,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:44,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:44,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:44,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 21 proven. 136 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-07-21 16:01:44,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737482259] [2020-07-21 16:01:44,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:44,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:01:44,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001236182] [2020-07-21 16:01:44,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:01:44,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:44,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:01:44,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:01:44,396 INFO L87 Difference]: Start difference. First operand 190 states and 336 transitions. Second operand 16 states. [2020-07-21 16:01:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:44,638 INFO L93 Difference]: Finished difference Result 217 states and 404 transitions. [2020-07-21 16:01:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:01:44,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 121 [2020-07-21 16:01:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:44,642 INFO L225 Difference]: With dead ends: 217 [2020-07-21 16:01:44,642 INFO L226 Difference]: Without dead ends: 213 [2020-07-21 16:01:44,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 218 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:01:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-07-21 16:01:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 202. [2020-07-21 16:01:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-21 16:01:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 372 transitions. [2020-07-21 16:01:44,662 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 372 transitions. Word has length 121 [2020-07-21 16:01:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:44,662 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 372 transitions. [2020-07-21 16:01:44,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:01:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 372 transitions. [2020-07-21 16:01:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 16:01:44,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:44,666 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:44,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:44,880 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1905629551, now seen corresponding path program 7 times [2020-07-21 16:01:44,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:44,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508312430] [2020-07-21 16:01:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:44,984 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:44,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 16:01:44,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 47 proven. 86 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2020-07-21 16:01:45,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:45,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:45,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:45,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:45,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:45,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:45,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 47 proven. 91 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2020-07-21 16:01:45,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508312430] [2020-07-21 16:01:45,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:45,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 16:01:45,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395258406] [2020-07-21 16:01:45,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 16:01:45,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 16:01:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:01:45,743 INFO L87 Difference]: Start difference. First operand 202 states and 372 transitions. Second operand 14 states. [2020-07-21 16:01:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:45,927 INFO L93 Difference]: Finished difference Result 253 states and 505 transitions. [2020-07-21 16:01:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:01:45,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 121 [2020-07-21 16:01:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:45,932 INFO L225 Difference]: With dead ends: 253 [2020-07-21 16:01:45,932 INFO L226 Difference]: Without dead ends: 249 [2020-07-21 16:01:45,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 221 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:01:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-21 16:01:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 202. [2020-07-21 16:01:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-21 16:01:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 372 transitions. [2020-07-21 16:01:45,955 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 372 transitions. Word has length 121 [2020-07-21 16:01:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:45,955 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 372 transitions. [2020-07-21 16:01:45,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 16:01:45,955 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 372 transitions. [2020-07-21 16:01:45,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 16:01:45,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:45,960 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 13, 13, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:46,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:46,174 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:46,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:46,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1215754055, now seen corresponding path program 8 times [2020-07-21 16:01:46,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:46,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109023372] [2020-07-21 16:01:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:46,334 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:46,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:01:46,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 260 proven. 223 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2020-07-21 16:01:46,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:47,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:47,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:47,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:47,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:48,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:48,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:48,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 260 proven. 235 refuted. 0 times theorem prover too weak. 541 trivial. 0 not checked. [2020-07-21 16:01:48,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109023372] [2020-07-21 16:01:48,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:48,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 25 [2020-07-21 16:01:48,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952002666] [2020-07-21 16:01:48,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:01:48,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:48,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:01:48,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:01:48,520 INFO L87 Difference]: Start difference. First operand 202 states and 372 transitions. Second operand 25 states. [2020-07-21 16:01:49,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:49,580 INFO L93 Difference]: Finished difference Result 494 states and 1063 transitions. [2020-07-21 16:01:49,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 16:01:49,580 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 199 [2020-07-21 16:01:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:49,586 INFO L225 Difference]: With dead ends: 494 [2020-07-21 16:01:49,586 INFO L226 Difference]: Without dead ends: 298 [2020-07-21 16:01:49,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 359 SyntacticMatches, 15 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 16:01:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-07-21 16:01:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 249. [2020-07-21 16:01:49,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-07-21 16:01:49,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 504 transitions. [2020-07-21 16:01:49,619 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 504 transitions. Word has length 199 [2020-07-21 16:01:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:49,620 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 504 transitions. [2020-07-21 16:01:49,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:01:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 504 transitions. [2020-07-21 16:01:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-21 16:01:49,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:49,625 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:49,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:49,837 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:49,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2023571201, now seen corresponding path program 3 times [2020-07-21 16:01:49,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:49,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388252907] [2020-07-21 16:01:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:49,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:01:49,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 16:01:49,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 77 proven. 92 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2020-07-21 16:01:50,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:50,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:50,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:50,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:50,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:50,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2020-07-21 16:01:50,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388252907] [2020-07-21 16:01:50,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:50,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 16:01:50,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983249631] [2020-07-21 16:01:50,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 16:01:50,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:50,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 16:01:50,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 16:01:50,990 INFO L87 Difference]: Start difference. First operand 249 states and 504 transitions. Second operand 14 states. [2020-07-21 16:01:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:51,188 INFO L93 Difference]: Finished difference Result 259 states and 526 transitions. [2020-07-21 16:01:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 16:01:51,189 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 145 [2020-07-21 16:01:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:51,193 INFO L225 Difference]: With dead ends: 259 [2020-07-21 16:01:51,193 INFO L226 Difference]: Without dead ends: 255 [2020-07-21 16:01:51,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 270 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:01:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-21 16:01:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 240. [2020-07-21 16:01:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-21 16:01:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 480 transitions. [2020-07-21 16:01:51,216 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 480 transitions. Word has length 145 [2020-07-21 16:01:51,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:51,217 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 480 transitions. [2020-07-21 16:01:51,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 16:01:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 480 transitions. [2020-07-21 16:01:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-07-21 16:01:51,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:51,223 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 16, 16, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:51,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:51,438 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:51,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:51,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2137979155, now seen corresponding path program 9 times [2020-07-21 16:01:51,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:51,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871565434] [2020-07-21 16:01:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:51,585 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:51,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:01:51,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:51,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1723 backedges. 932 proven. 86 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2020-07-21 16:01:51,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:52,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:52,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:52,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:53,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:53,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:53,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:53,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:53,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1723 backedges. 117 proven. 427 refuted. 0 times theorem prover too weak. 1179 trivial. 0 not checked. [2020-07-21 16:01:53,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871565434] [2020-07-21 16:01:53,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:53,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 19 [2020-07-21 16:01:53,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597416979] [2020-07-21 16:01:53,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 16:01:53,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:53,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 16:01:53,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-21 16:01:53,578 INFO L87 Difference]: Start difference. First operand 240 states and 480 transitions. Second operand 19 states. [2020-07-21 16:01:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:54,185 INFO L93 Difference]: Finished difference Result 504 states and 1088 transitions. [2020-07-21 16:01:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 16:01:54,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 251 [2020-07-21 16:01:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:54,189 INFO L225 Difference]: With dead ends: 504 [2020-07-21 16:01:54,190 INFO L226 Difference]: Without dead ends: 266 [2020-07-21 16:01:54,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 471 SyntacticMatches, 13 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2020-07-21 16:01:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-07-21 16:01:54,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 242. [2020-07-21 16:01:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-21 16:01:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 451 transitions. [2020-07-21 16:01:54,218 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 451 transitions. Word has length 251 [2020-07-21 16:01:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:54,219 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 451 transitions. [2020-07-21 16:01:54,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 16:01:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 451 transitions. [2020-07-21 16:01:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-07-21 16:01:54,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:54,223 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 16, 16, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:54,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:54,437 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:54,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1698861657, now seen corresponding path program 5 times [2020-07-21 16:01:54,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:54,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937970501] [2020-07-21 16:01:54,438 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:54,596 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:54,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:54,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:01:54,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1702 backedges. 230 proven. 470 refuted. 0 times theorem prover too weak. 1002 trivial. 0 not checked. [2020-07-21 16:01:54,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:55,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:55,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:56,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:57,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:57,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:57,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1702 backedges. 232 proven. 481 refuted. 0 times theorem prover too weak. 989 trivial. 0 not checked. [2020-07-21 16:01:57,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937970501] [2020-07-21 16:01:57,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:01:57,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 27 [2020-07-21 16:01:57,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774343420] [2020-07-21 16:01:57,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:01:57,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:01:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:01:57,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:01:57,264 INFO L87 Difference]: Start difference. First operand 242 states and 451 transitions. Second operand 27 states. [2020-07-21 16:01:58,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:01:58,221 INFO L93 Difference]: Finished difference Result 510 states and 1113 transitions. [2020-07-21 16:01:58,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 16:01:58,222 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 249 [2020-07-21 16:01:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:01:58,227 INFO L225 Difference]: With dead ends: 510 [2020-07-21 16:01:58,227 INFO L226 Difference]: Without dead ends: 273 [2020-07-21 16:01:58,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 456 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=296, Invalid=1510, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 16:01:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-21 16:01:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 242. [2020-07-21 16:01:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-07-21 16:01:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 441 transitions. [2020-07-21 16:01:58,251 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 441 transitions. Word has length 249 [2020-07-21 16:01:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:01:58,252 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 441 transitions. [2020-07-21 16:01:58,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:01:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 441 transitions. [2020-07-21 16:01:58,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-21 16:01:58,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:01:58,255 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:01:58,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:58,471 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:01:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:01:58,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1074522617, now seen corresponding path program 6 times [2020-07-21 16:01:58,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:01:58,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834559852] [2020-07-21 16:01:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:01:58,639 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:01:58,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:01:58,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:01:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:01:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 179 proven. 327 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2020-07-21 16:01:58,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:01:59,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:01:59,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:00,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:00,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:00,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:00,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:00,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:01,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:01,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:01,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:01,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 179 proven. 340 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-07-21 16:02:01,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834559852] [2020-07-21 16:02:01,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:01,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 16:02:01,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024018219] [2020-07-21 16:02:01,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:02:01,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:01,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:02:01,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:02:01,172 INFO L87 Difference]: Start difference. First operand 242 states and 441 transitions. Second operand 25 states. [2020-07-21 16:02:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:02,158 INFO L93 Difference]: Finished difference Result 489 states and 961 transitions. [2020-07-21 16:02:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 16:02:02,161 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 197 [2020-07-21 16:02:02,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:02,166 INFO L225 Difference]: With dead ends: 489 [2020-07-21 16:02:02,166 INFO L226 Difference]: Without dead ends: 248 [2020-07-21 16:02:02,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 352 SyntacticMatches, 19 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 16:02:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-07-21 16:02:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 231. [2020-07-21 16:02:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-21 16:02:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 431 transitions. [2020-07-21 16:02:02,189 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 431 transitions. Word has length 197 [2020-07-21 16:02:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:02,190 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 431 transitions. [2020-07-21 16:02:02,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:02:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 431 transitions. [2020-07-21 16:02:02,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-07-21 16:02:02,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:02,193 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:02,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:02,407 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash 877889841, now seen corresponding path program 3 times [2020-07-21 16:02:02,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:02,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730763416] [2020-07-21 16:02:02,409 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:02,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:02,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:02:02,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 179 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2020-07-21 16:02:02,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:03,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:03,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:03,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 193 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2020-07-21 16:02:04,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730763416] [2020-07-21 16:02:04,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:04,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:02:04,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844912698] [2020-07-21 16:02:04,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:02:04,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:04,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:02:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:02:04,390 INFO L87 Difference]: Start difference. First operand 231 states and 431 transitions. Second operand 18 states. [2020-07-21 16:02:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:04,722 INFO L93 Difference]: Finished difference Result 238 states and 441 transitions. [2020-07-21 16:02:04,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:02:04,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 143 [2020-07-21 16:02:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:04,730 INFO L225 Difference]: With dead ends: 238 [2020-07-21 16:02:04,730 INFO L226 Difference]: Without dead ends: 234 [2020-07-21 16:02:04,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 259 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:02:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-21 16:02:04,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2020-07-21 16:02:04,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-07-21 16:02:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 422 transitions. [2020-07-21 16:02:04,762 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 422 transitions. Word has length 143 [2020-07-21 16:02:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:04,762 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 422 transitions. [2020-07-21 16:02:04,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:02:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 422 transitions. [2020-07-21 16:02:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-07-21 16:02:04,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:04,768 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 16, 16, 12, 11, 10, 10, 10, 10, 10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:04,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:04,984 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash -447944489, now seen corresponding path program 10 times [2020-07-21 16:02:04,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:04,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048331746] [2020-07-21 16:02:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:05,188 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:05,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:05,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:02:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 974 proven. 149 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-21 16:02:05,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:06,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:06,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 216 proven. 364 refuted. 0 times theorem prover too weak. 1153 trivial. 0 not checked. [2020-07-21 16:02:07,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048331746] [2020-07-21 16:02:07,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:07,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 19 [2020-07-21 16:02:07,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580535962] [2020-07-21 16:02:07,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 16:02:07,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:07,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 16:02:07,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-07-21 16:02:07,062 INFO L87 Difference]: Start difference. First operand 229 states and 422 transitions. Second operand 19 states. [2020-07-21 16:02:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:07,797 INFO L93 Difference]: Finished difference Result 507 states and 1026 transitions. [2020-07-21 16:02:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 16:02:07,798 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 252 [2020-07-21 16:02:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:07,806 INFO L225 Difference]: With dead ends: 507 [2020-07-21 16:02:07,806 INFO L226 Difference]: Without dead ends: 261 [2020-07-21 16:02:07,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 473 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 16:02:07,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-21 16:02:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 234. [2020-07-21 16:02:07,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-21 16:02:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 437 transitions. [2020-07-21 16:02:07,833 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 437 transitions. Word has length 252 [2020-07-21 16:02:07,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:07,834 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 437 transitions. [2020-07-21 16:02:07,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 16:02:07,834 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 437 transitions. [2020-07-21 16:02:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-21 16:02:07,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:07,839 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 16, 16, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:08,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:08,053 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:08,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:08,053 INFO L82 PathProgramCache]: Analyzing trace with hash 65081924, now seen corresponding path program 11 times [2020-07-21 16:02:08,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:08,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808373177] [2020-07-21 16:02:08,054 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:08,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:08,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:08,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:02:08,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 1817 proven. 206 refuted. 0 times theorem prover too weak. 1301 trivial. 0 not checked. [2020-07-21 16:02:08,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:10,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 428 proven. 510 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2020-07-21 16:02:10,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808373177] [2020-07-21 16:02:10,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:10,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 23 [2020-07-21 16:02:10,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070876400] [2020-07-21 16:02:10,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 16:02:10,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:10,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 16:02:10,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:02:10,938 INFO L87 Difference]: Start difference. First operand 234 states and 437 transitions. Second operand 23 states. [2020-07-21 16:02:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:11,777 INFO L93 Difference]: Finished difference Result 618 states and 1296 transitions. [2020-07-21 16:02:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 16:02:11,778 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 345 [2020-07-21 16:02:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:11,784 INFO L225 Difference]: With dead ends: 618 [2020-07-21 16:02:11,784 INFO L226 Difference]: Without dead ends: 384 [2020-07-21 16:02:11,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 703 GetRequests, 655 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 16:02:11,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-07-21 16:02:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 302. [2020-07-21 16:02:11,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-07-21 16:02:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 579 transitions. [2020-07-21 16:02:11,822 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 579 transitions. Word has length 345 [2020-07-21 16:02:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:11,822 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 579 transitions. [2020-07-21 16:02:11,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 16:02:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 579 transitions. [2020-07-21 16:02:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-07-21 16:02:11,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:11,830 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 14, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:12,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:12,044 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:12,044 INFO L82 PathProgramCache]: Analyzing trace with hash -935620688, now seen corresponding path program 12 times [2020-07-21 16:02:12,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:12,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584564249] [2020-07-21 16:02:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:12,264 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:12,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:02:12,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 1496 proven. 323 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2020-07-21 16:02:12,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:14,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:14,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:14,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:15,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:15,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:15,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:15,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:15,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:15,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:15,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:15,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2757 backedges. 263 proven. 753 refuted. 0 times theorem prover too weak. 1741 trivial. 0 not checked. [2020-07-21 16:02:15,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584564249] [2020-07-21 16:02:15,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:15,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 16:02:15,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196638119] [2020-07-21 16:02:15,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:02:15,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:15,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:02:15,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:02:15,682 INFO L87 Difference]: Start difference. First operand 302 states and 579 transitions. Second operand 25 states. [2020-07-21 16:02:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:16,722 INFO L93 Difference]: Finished difference Result 661 states and 1387 transitions. [2020-07-21 16:02:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 16:02:16,723 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 315 [2020-07-21 16:02:16,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:16,731 INFO L225 Difference]: With dead ends: 661 [2020-07-21 16:02:16,731 INFO L226 Difference]: Without dead ends: 361 [2020-07-21 16:02:16,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 588 SyntacticMatches, 19 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 16:02:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-07-21 16:02:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 221. [2020-07-21 16:02:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 16:02:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 362 transitions. [2020-07-21 16:02:16,767 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 362 transitions. Word has length 315 [2020-07-21 16:02:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:16,768 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 362 transitions. [2020-07-21 16:02:16,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:02:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 362 transitions. [2020-07-21 16:02:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-07-21 16:02:16,773 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:16,773 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:16,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:16,989 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1316077641, now seen corresponding path program 13 times [2020-07-21 16:02:16,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:16,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761684111] [2020-07-21 16:02:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:17,199 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:17,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:17,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:02:17,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 304 proven. 91 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2020-07-21 16:02:17,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:18,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:18,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 113 proven. 191 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-07-21 16:02:19,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761684111] [2020-07-21 16:02:19,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:19,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 21 [2020-07-21 16:02:19,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218274650] [2020-07-21 16:02:19,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 16:02:19,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 16:02:19,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:02:19,038 INFO L87 Difference]: Start difference. First operand 221 states and 362 transitions. Second operand 21 states. [2020-07-21 16:02:19,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:19,676 INFO L93 Difference]: Finished difference Result 440 states and 737 transitions. [2020-07-21 16:02:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 16:02:19,677 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 148 [2020-07-21 16:02:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:19,680 INFO L225 Difference]: With dead ends: 440 [2020-07-21 16:02:19,680 INFO L226 Difference]: Without dead ends: 225 [2020-07-21 16:02:19,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 261 SyntacticMatches, 15 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:02:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-21 16:02:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 217. [2020-07-21 16:02:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-21 16:02:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 348 transitions. [2020-07-21 16:02:19,706 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 348 transitions. Word has length 148 [2020-07-21 16:02:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:19,706 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 348 transitions. [2020-07-21 16:02:19,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 16:02:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 348 transitions. [2020-07-21 16:02:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-21 16:02:19,708 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:19,709 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:19,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:19,927 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:19,928 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 14 times [2020-07-21 16:02:19,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:19,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182477441] [2020-07-21 16:02:19,929 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:20,158 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:20,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:20,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:02:20,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 135 proven. 174 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-07-21 16:02:20,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:21,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:21,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:21,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:21,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:21,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:21,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:21,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:22,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:22,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:22,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 135 proven. 186 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2020-07-21 16:02:22,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182477441] [2020-07-21 16:02:22,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:22,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 16:02:22,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563382260] [2020-07-21 16:02:22,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 16:02:22,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:22,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 16:02:22,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:02:22,201 INFO L87 Difference]: Start difference. First operand 217 states and 348 transitions. Second operand 23 states. [2020-07-21 16:02:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:23,220 INFO L93 Difference]: Finished difference Result 469 states and 801 transitions. [2020-07-21 16:02:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 16:02:23,221 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 150 [2020-07-21 16:02:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:23,224 INFO L225 Difference]: With dead ends: 469 [2020-07-21 16:02:23,224 INFO L226 Difference]: Without dead ends: 226 [2020-07-21 16:02:23,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 261 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 16:02:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-21 16:02:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 216. [2020-07-21 16:02:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 16:02:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 343 transitions. [2020-07-21 16:02:23,243 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 343 transitions. Word has length 150 [2020-07-21 16:02:23,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:23,243 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 343 transitions. [2020-07-21 16:02:23,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 16:02:23,243 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 343 transitions. [2020-07-21 16:02:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-07-21 16:02:23,245 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:23,246 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 9, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:23,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:23,459 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:23,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1129775539, now seen corresponding path program 15 times [2020-07-21 16:02:23,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:23,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663049417] [2020-07-21 16:02:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:23,706 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:23,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:02:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 191 proven. 228 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2020-07-21 16:02:23,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:24,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:24,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:25,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:25,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:25,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:25,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:25,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 191 proven. 242 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2020-07-21 16:02:26,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663049417] [2020-07-21 16:02:26,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:26,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 16:02:26,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69916914] [2020-07-21 16:02:26,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:02:26,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:26,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:02:26,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:02:26,232 INFO L87 Difference]: Start difference. First operand 216 states and 343 transitions. Second operand 25 states. [2020-07-21 16:02:27,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:27,209 INFO L93 Difference]: Finished difference Result 436 states and 704 transitions. [2020-07-21 16:02:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 16:02:27,210 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-07-21 16:02:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:27,213 INFO L225 Difference]: With dead ends: 436 [2020-07-21 16:02:27,213 INFO L226 Difference]: Without dead ends: 226 [2020-07-21 16:02:27,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 305 SyntacticMatches, 19 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 16:02:27,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-07-21 16:02:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 207. [2020-07-21 16:02:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-21 16:02:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 314 transitions. [2020-07-21 16:02:27,231 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 314 transitions. Word has length 174 [2020-07-21 16:02:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:27,232 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 314 transitions. [2020-07-21 16:02:27,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:02:27,232 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 314 transitions. [2020-07-21 16:02:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-21 16:02:27,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:27,234 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:27,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:27,444 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:27,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:27,445 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 16 times [2020-07-21 16:02:27,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:27,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277307077] [2020-07-21 16:02:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:27,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:27,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:27,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:02:27,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 45 proven. 260 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2020-07-21 16:02:27,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:28,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:28,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:29,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:29,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:29,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:29,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:29,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 45 proven. 276 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2020-07-21 16:02:29,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277307077] [2020-07-21 16:02:29,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:29,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 16:02:29,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543331712] [2020-07-21 16:02:29,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:02:29,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:29,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:02:29,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:02:29,577 INFO L87 Difference]: Start difference. First operand 207 states and 314 transitions. Second operand 18 states. [2020-07-21 16:02:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:29,886 INFO L93 Difference]: Finished difference Result 236 states and 364 transitions. [2020-07-21 16:02:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:02:29,887 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 177 [2020-07-21 16:02:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:29,890 INFO L225 Difference]: With dead ends: 236 [2020-07-21 16:02:29,890 INFO L226 Difference]: Without dead ends: 232 [2020-07-21 16:02:29,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 325 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 16:02:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-21 16:02:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2020-07-21 16:02:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-07-21 16:02:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 355 transitions. [2020-07-21 16:02:29,910 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 355 transitions. Word has length 177 [2020-07-21 16:02:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:29,910 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 355 transitions. [2020-07-21 16:02:29,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:02:29,911 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 355 transitions. [2020-07-21 16:02:29,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-07-21 16:02:29,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:29,913 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 10, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:30,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:30,128 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:30,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1803358882, now seen corresponding path program 17 times [2020-07-21 16:02:30,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:30,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823153922] [2020-07-21 16:02:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:30,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:30,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:02:30,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 79 proven. 212 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-07-21 16:02:30,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:31,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:31,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:31,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:31,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:31,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 79 proven. 222 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2020-07-21 16:02:31,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823153922] [2020-07-21 16:02:31,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:31,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:02:31,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760327794] [2020-07-21 16:02:31,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:02:31,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:31,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:02:31,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:02:31,948 INFO L87 Difference]: Start difference. First operand 229 states and 355 transitions. Second operand 16 states. [2020-07-21 16:02:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:32,190 INFO L93 Difference]: Finished difference Result 279 states and 443 transitions. [2020-07-21 16:02:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:02:32,192 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 189 [2020-07-21 16:02:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:32,195 INFO L225 Difference]: With dead ends: 279 [2020-07-21 16:02:32,195 INFO L226 Difference]: Without dead ends: 275 [2020-07-21 16:02:32,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 353 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:02:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-07-21 16:02:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 229. [2020-07-21 16:02:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-07-21 16:02:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 355 transitions. [2020-07-21 16:02:32,213 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 355 transitions. Word has length 189 [2020-07-21 16:02:32,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:32,214 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 355 transitions. [2020-07-21 16:02:32,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:02:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 355 transitions. [2020-07-21 16:02:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 16:02:32,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:32,217 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:32,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:32,431 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:32,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:32,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1711365749, now seen corresponding path program 18 times [2020-07-21 16:02:32,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:32,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857255799] [2020-07-21 16:02:32,433 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:32,725 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:32,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:32,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:02:32,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 111 proven. 200 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2020-07-21 16:02:32,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:33,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:33,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:33,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:33,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:33,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:33,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:34,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:34,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 111 proven. 210 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2020-07-21 16:02:34,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857255799] [2020-07-21 16:02:34,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:34,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:02:34,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718665997] [2020-07-21 16:02:34,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:02:34,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:34,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:02:34,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:02:34,213 INFO L87 Difference]: Start difference. First operand 229 states and 355 transitions. Second operand 16 states. [2020-07-21 16:02:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:34,458 INFO L93 Difference]: Finished difference Result 267 states and 417 transitions. [2020-07-21 16:02:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:02:34,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 201 [2020-07-21 16:02:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:34,463 INFO L225 Difference]: With dead ends: 267 [2020-07-21 16:02:34,463 INFO L226 Difference]: Without dead ends: 263 [2020-07-21 16:02:34,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 377 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:02:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-07-21 16:02:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 232. [2020-07-21 16:02:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 16:02:34,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 361 transitions. [2020-07-21 16:02:34,481 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 361 transitions. Word has length 201 [2020-07-21 16:02:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:34,482 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 361 transitions. [2020-07-21 16:02:34,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:02:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 361 transitions. [2020-07-21 16:02:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-07-21 16:02:34,485 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:34,485 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:34,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:34,699 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash 120952594, now seen corresponding path program 19 times [2020-07-21 16:02:34,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:34,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118016515] [2020-07-21 16:02:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:35,003 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:02:35,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:35,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:02:35,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 301 proven. 76 refuted. 0 times theorem prover too weak. 1125 trivial. 0 not checked. [2020-07-21 16:02:35,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:35,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:35,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:36,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:36,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:36,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 303 proven. 84 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2020-07-21 16:02:36,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118016515] [2020-07-21 16:02:36,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:36,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 16:02:36,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927750811] [2020-07-21 16:02:36,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 16:02:36,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 16:02:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 16:02:36,598 INFO L87 Difference]: Start difference. First operand 232 states and 361 transitions. Second operand 16 states. [2020-07-21 16:02:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:36,843 INFO L93 Difference]: Finished difference Result 254 states and 404 transitions. [2020-07-21 16:02:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:02:36,845 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 237 [2020-07-21 16:02:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:36,848 INFO L225 Difference]: With dead ends: 254 [2020-07-21 16:02:36,848 INFO L226 Difference]: Without dead ends: 250 [2020-07-21 16:02:36,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 450 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:02:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-21 16:02:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 208. [2020-07-21 16:02:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 16:02:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 314 transitions. [2020-07-21 16:02:36,865 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 314 transitions. Word has length 237 [2020-07-21 16:02:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:36,866 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 314 transitions. [2020-07-21 16:02:36,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 16:02:36,866 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 314 transitions. [2020-07-21 16:02:36,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-07-21 16:02:36,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:36,870 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 27, 27, 20, 20, 16, 16, 16, 16, 16, 16, 16, 13, 13, 13, 13, 13, 13, 13, 12, 7, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:37,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:37,083 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:37,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1315602204, now seen corresponding path program 20 times [2020-07-21 16:02:37,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:37,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663381099] [2020-07-21 16:02:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:37,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:02:37,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 2084 proven. 75 refuted. 0 times theorem prover too weak. 2401 trivial. 0 not checked. [2020-07-21 16:02:37,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:39,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:39,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:39,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:40,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:40,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:40,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:40,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 253 proven. 803 refuted. 0 times theorem prover too weak. 3504 trivial. 0 not checked. [2020-07-21 16:02:40,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663381099] [2020-07-21 16:02:40,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:40,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 19 [2020-07-21 16:02:40,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031069463] [2020-07-21 16:02:40,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 16:02:40,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 16:02:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2020-07-21 16:02:40,399 INFO L87 Difference]: Start difference. First operand 208 states and 314 transitions. Second operand 19 states. [2020-07-21 16:02:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:40,881 INFO L93 Difference]: Finished difference Result 367 states and 563 transitions. [2020-07-21 16:02:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 16:02:40,882 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 401 [2020-07-21 16:02:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:40,885 INFO L225 Difference]: With dead ends: 367 [2020-07-21 16:02:40,885 INFO L226 Difference]: Without dead ends: 165 [2020-07-21 16:02:40,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 771 SyntacticMatches, 13 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2020-07-21 16:02:40,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-21 16:02:40,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2020-07-21 16:02:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 16:02:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 219 transitions. [2020-07-21 16:02:40,899 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 219 transitions. Word has length 401 [2020-07-21 16:02:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:40,899 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 219 transitions. [2020-07-21 16:02:40,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 16:02:40,899 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 219 transitions. [2020-07-21 16:02:40,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-07-21 16:02:40,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:40,902 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 17, 17, 14, 14, 11, 11, 11, 11, 11, 11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:41,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:41,115 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:41,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:41,116 INFO L82 PathProgramCache]: Analyzing trace with hash -71527620, now seen corresponding path program 21 times [2020-07-21 16:02:41,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:41,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002697154] [2020-07-21 16:02:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:41,434 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:41,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:02:41,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 437 proven. 419 refuted. 0 times theorem prover too weak. 1126 trivial. 0 not checked. [2020-07-21 16:02:41,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:43,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:43,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:43,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:43,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:43,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:44,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:44,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:44,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:44,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:44,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1982 backedges. 439 proven. 435 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2020-07-21 16:02:44,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002697154] [2020-07-21 16:02:44,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:44,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 16:02:44,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656273158] [2020-07-21 16:02:44,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:02:44,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:44,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:02:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:02:44,945 INFO L87 Difference]: Start difference. First operand 156 states and 219 transitions. Second operand 27 states. [2020-07-21 16:02:46,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:46,246 INFO L93 Difference]: Finished difference Result 332 states and 483 transitions. [2020-07-21 16:02:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 16:02:46,248 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 269 [2020-07-21 16:02:46,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:46,250 INFO L225 Difference]: With dead ends: 332 [2020-07-21 16:02:46,250 INFO L226 Difference]: Without dead ends: 176 [2020-07-21 16:02:46,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 491 SyntacticMatches, 21 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=1587, Unknown=0, NotChecked=0, Total=1892 [2020-07-21 16:02:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-07-21 16:02:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 156. [2020-07-21 16:02:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 16:02:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 211 transitions. [2020-07-21 16:02:46,261 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 211 transitions. Word has length 269 [2020-07-21 16:02:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:46,262 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 211 transitions. [2020-07-21 16:02:46,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:02:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 211 transitions. [2020-07-21 16:02:46,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 16:02:46,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:46,266 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 29, 29, 26, 25, 21, 21, 21, 21, 21, 21, 21, 16, 14, 14, 14, 14, 14, 14, 14, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:46,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:46,481 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:46,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:46,482 INFO L82 PathProgramCache]: Analyzing trace with hash 308915838, now seen corresponding path program 22 times [2020-07-21 16:02:46,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:46,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654648061] [2020-07-21 16:02:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:46,925 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:46,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:46,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:02:46,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6897 backedges. 3813 proven. 353 refuted. 0 times theorem prover too weak. 2731 trivial. 0 not checked. [2020-07-21 16:02:47,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:49,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:49,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:49,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:49,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:49,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:50,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:50,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:50,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:50,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:50,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:50,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6897 backedges. 395 proven. 1180 refuted. 0 times theorem prover too weak. 5322 trivial. 0 not checked. [2020-07-21 16:02:50,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654648061] [2020-07-21 16:02:50,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:50,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 23 [2020-07-21 16:02:50,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946634029] [2020-07-21 16:02:50,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 16:02:50,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:50,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 16:02:50,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:02:50,982 INFO L87 Difference]: Start difference. First operand 156 states and 211 transitions. Second operand 23 states. [2020-07-21 16:02:52,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:52,020 INFO L93 Difference]: Finished difference Result 382 states and 574 transitions. [2020-07-21 16:02:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 16:02:52,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 484 [2020-07-21 16:02:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:52,025 INFO L225 Difference]: With dead ends: 382 [2020-07-21 16:02:52,025 INFO L226 Difference]: Without dead ends: 220 [2020-07-21 16:02:52,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 984 GetRequests, 929 SyntacticMatches, 17 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 16:02:52,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-21 16:02:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 195. [2020-07-21 16:02:52,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-21 16:02:52,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 274 transitions. [2020-07-21 16:02:52,040 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 274 transitions. Word has length 484 [2020-07-21 16:02:52,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:52,041 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 274 transitions. [2020-07-21 16:02:52,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 16:02:52,041 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 274 transitions. [2020-07-21 16:02:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 16:02:52,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:52,044 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 19, 19, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:52,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:52,259 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1515669988, now seen corresponding path program 23 times [2020-07-21 16:02:52,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:52,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918730610] [2020-07-21 16:02:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:52,624 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:52,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 16:02:52,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:52,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 1761 proven. 430 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2020-07-21 16:02:52,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:02:55,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:55,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:55,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:55,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:55,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:55,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:55,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:56,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:56,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:56,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:56,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:56,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:56,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:02:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3418 backedges. 345 proven. 829 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-07-21 16:02:56,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918730610] [2020-07-21 16:02:56,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:02:56,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21] total 25 [2020-07-21 16:02:56,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885637724] [2020-07-21 16:02:56,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 16:02:56,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:02:56,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 16:02:56,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2020-07-21 16:02:56,699 INFO L87 Difference]: Start difference. First operand 195 states and 274 transitions. Second operand 25 states. [2020-07-21 16:02:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:02:57,950 INFO L93 Difference]: Finished difference Result 493 states and 764 transitions. [2020-07-21 16:02:57,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 16:02:57,951 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 351 [2020-07-21 16:02:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:02:57,954 INFO L225 Difference]: With dead ends: 493 [2020-07-21 16:02:57,954 INFO L226 Difference]: Without dead ends: 272 [2020-07-21 16:02:57,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 659 SyntacticMatches, 19 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=1498, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 16:02:57,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-21 16:02:57,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 198. [2020-07-21 16:02:57,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 16:02:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 277 transitions. [2020-07-21 16:02:57,969 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 277 transitions. Word has length 351 [2020-07-21 16:02:57,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:02:57,970 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 277 transitions. [2020-07-21 16:02:57,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 16:02:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 277 transitions. [2020-07-21 16:02:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-21 16:02:57,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:02:57,973 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 21, 20, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:02:58,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:58,187 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:02:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:02:58,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1533202372, now seen corresponding path program 24 times [2020-07-21 16:02:58,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:02:58,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296697441] [2020-07-21 16:02:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:02:58,587 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:02:58,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:02:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:02:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:02:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4548 backedges. 623 proven. 787 refuted. 0 times theorem prover too weak. 3138 trivial. 0 not checked. [2020-07-21 16:02:58,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:00,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:01,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:02,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4548 backedges. 625 proven. 805 refuted. 0 times theorem prover too weak. 3118 trivial. 0 not checked. [2020-07-21 16:03:03,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296697441] [2020-07-21 16:03:03,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:03,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 16:03:03,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491282048] [2020-07-21 16:03:03,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:03:03,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:03,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:03:03,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:03:03,134 INFO L87 Difference]: Start difference. First operand 198 states and 277 transitions. Second operand 27 states. [2020-07-21 16:03:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:04,709 INFO L93 Difference]: Finished difference Result 531 states and 849 transitions. [2020-07-21 16:03:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 16:03:04,710 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 402 [2020-07-21 16:03:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:04,713 INFO L225 Difference]: With dead ends: 531 [2020-07-21 16:03:04,714 INFO L226 Difference]: Without dead ends: 317 [2020-07-21 16:03:04,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 757 SyntacticMatches, 21 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=2042, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 16:03:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-07-21 16:03:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 232. [2020-07-21 16:03:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-21 16:03:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 332 transitions. [2020-07-21 16:03:04,733 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 332 transitions. Word has length 402 [2020-07-21 16:03:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:04,733 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 332 transitions. [2020-07-21 16:03:04,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:03:04,734 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 332 transitions. [2020-07-21 16:03:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-21 16:03:04,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:04,738 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 36, 36, 27, 27, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 14, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:04,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:04,953 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:04,954 INFO L82 PathProgramCache]: Analyzing trace with hash 331302285, now seen corresponding path program 25 times [2020-07-21 16:03:04,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:04,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995810903] [2020-07-21 16:03:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:05,422 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:03:05,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:05,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 16:03:05,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7874 backedges. 682 proven. 1727 refuted. 0 times theorem prover too weak. 5465 trivial. 0 not checked. [2020-07-21 16:03:05,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:09,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:09,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:09,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:09,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:10,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:11,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:11,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7874 backedges. 682 proven. 1767 refuted. 0 times theorem prover too weak. 5425 trivial. 0 not checked. [2020-07-21 16:03:12,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995810903] [2020-07-21 16:03:12,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:12,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 29] total 35 [2020-07-21 16:03:12,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432789254] [2020-07-21 16:03:12,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 16:03:12,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:12,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 16:03:12,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 16:03:12,884 INFO L87 Difference]: Start difference. First operand 232 states and 332 transitions. Second operand 35 states. [2020-07-21 16:03:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:15,666 INFO L93 Difference]: Finished difference Result 616 states and 1039 transitions. [2020-07-21 16:03:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 16:03:15,673 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 523 [2020-07-21 16:03:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:15,678 INFO L225 Difference]: With dead ends: 616 [2020-07-21 16:03:15,679 INFO L226 Difference]: Without dead ends: 388 [2020-07-21 16:03:15,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1077 GetRequests, 987 SyntacticMatches, 25 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=660, Invalid=3762, Unknown=0, NotChecked=0, Total=4422 [2020-07-21 16:03:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-07-21 16:03:15,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 332. [2020-07-21 16:03:15,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-07-21 16:03:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 531 transitions. [2020-07-21 16:03:15,707 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 531 transitions. Word has length 523 [2020-07-21 16:03:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:15,708 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 531 transitions. [2020-07-21 16:03:15,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 16:03:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 531 transitions. [2020-07-21 16:03:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-07-21 16:03:15,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:15,712 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 19, 19, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 11, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:15,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:15,926 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1115821430, now seen corresponding path program 26 times [2020-07-21 16:03:15,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:15,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551965732] [2020-07-21 16:03:15,929 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:16,423 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:03:16,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:03:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5094 backedges. 2556 proven. 297 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2020-07-21 16:03:16,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:18,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:18,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:18,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:18,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:18,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:18,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:19,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:19,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:19,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:19,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:19,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:19,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5094 backedges. 548 proven. 639 refuted. 0 times theorem prover too weak. 3907 trivial. 0 not checked. [2020-07-21 16:03:19,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551965732] [2020-07-21 16:03:19,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:19,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 21 [2020-07-21 16:03:19,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527898912] [2020-07-21 16:03:19,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 16:03:19,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:19,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 16:03:19,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:03:19,869 INFO L87 Difference]: Start difference. First operand 332 states and 531 transitions. Second operand 21 states. [2020-07-21 16:03:20,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:20,791 INFO L93 Difference]: Finished difference Result 812 states and 1394 transitions. [2020-07-21 16:03:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 16:03:20,792 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 423 [2020-07-21 16:03:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:20,798 INFO L225 Difference]: With dead ends: 812 [2020-07-21 16:03:20,799 INFO L226 Difference]: Without dead ends: 425 [2020-07-21 16:03:20,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 811 SyntacticMatches, 15 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 16:03:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-07-21 16:03:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 353. [2020-07-21 16:03:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-07-21 16:03:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 577 transitions. [2020-07-21 16:03:20,829 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 577 transitions. Word has length 423 [2020-07-21 16:03:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:20,829 INFO L479 AbstractCegarLoop]: Abstraction has 353 states and 577 transitions. [2020-07-21 16:03:20,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 16:03:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 577 transitions. [2020-07-21 16:03:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-07-21 16:03:20,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:20,835 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 36, 36, 23, 23, 21, 21, 21, 21, 21, 21, 21, 20, 18, 18, 18, 18, 18, 18, 18, 13, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:21,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:21,049 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:21,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:21,050 INFO L82 PathProgramCache]: Analyzing trace with hash 816190698, now seen corresponding path program 27 times [2020-07-21 16:03:21,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:21,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926396623] [2020-07-21 16:03:21,051 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:21,541 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:03:21,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:21,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:03:21,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8090 backedges. 4332 proven. 672 refuted. 0 times theorem prover too weak. 3086 trivial. 0 not checked. [2020-07-21 16:03:21,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:25,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:25,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:25,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:25,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:26,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8090 backedges. 489 proven. 1537 refuted. 0 times theorem prover too weak. 6064 trivial. 0 not checked. [2020-07-21 16:03:27,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926396623] [2020-07-21 16:03:27,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:27,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 16:03:27,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936031053] [2020-07-21 16:03:27,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:03:27,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:27,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:03:27,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:03:27,593 INFO L87 Difference]: Start difference. First operand 353 states and 577 transitions. Second operand 27 states. [2020-07-21 16:03:28,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:28,853 INFO L93 Difference]: Finished difference Result 777 states and 1384 transitions. [2020-07-21 16:03:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-21 16:03:28,854 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 527 [2020-07-21 16:03:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:28,860 INFO L225 Difference]: With dead ends: 777 [2020-07-21 16:03:28,860 INFO L226 Difference]: Without dead ends: 418 [2020-07-21 16:03:28,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1072 GetRequests, 1007 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=1727, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 16:03:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-07-21 16:03:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 288. [2020-07-21 16:03:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-07-21 16:03:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 449 transitions. [2020-07-21 16:03:28,891 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 449 transitions. Word has length 527 [2020-07-21 16:03:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:28,892 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 449 transitions. [2020-07-21 16:03:28,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:03:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 449 transitions. [2020-07-21 16:03:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 16:03:28,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:28,895 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 17, 16, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 10, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:29,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:29,111 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1824031432, now seen corresponding path program 28 times [2020-07-21 16:03:29,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:29,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314147938] [2020-07-21 16:03:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:29,599 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:29,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:29,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:03:29,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 154 proven. 552 refuted. 0 times theorem prover too weak. 2634 trivial. 0 not checked. [2020-07-21 16:03:29,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:31,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:31,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3340 backedges. 154 proven. 568 refuted. 0 times theorem prover too weak. 2618 trivial. 0 not checked. [2020-07-21 16:03:32,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314147938] [2020-07-21 16:03:32,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:32,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 16:03:32,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110711827] [2020-07-21 16:03:32,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:03:32,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:32,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:03:32,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:03:32,545 INFO L87 Difference]: Start difference. First operand 288 states and 449 transitions. Second operand 17 states. [2020-07-21 16:03:32,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:32,850 INFO L93 Difference]: Finished difference Result 382 states and 622 transitions. [2020-07-21 16:03:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:03:32,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 346 [2020-07-21 16:03:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:32,854 INFO L225 Difference]: With dead ends: 382 [2020-07-21 16:03:32,855 INFO L226 Difference]: Without dead ends: 378 [2020-07-21 16:03:32,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 663 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:03:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-07-21 16:03:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 375. [2020-07-21 16:03:32,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-07-21 16:03:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 612 transitions. [2020-07-21 16:03:32,879 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 612 transitions. Word has length 346 [2020-07-21 16:03:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:32,880 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 612 transitions. [2020-07-21 16:03:32,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:03:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 612 transitions. [2020-07-21 16:03:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 16:03:32,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:32,884 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 24, 24, 17, 16, 15, 15, 15, 15, 15, 15, 15, 14, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:33,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:33,097 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:33,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:33,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1154184232, now seen corresponding path program 29 times [2020-07-21 16:03:33,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:33,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168369259] [2020-07-21 16:03:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:33,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:33,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:33,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:03:33,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3904 backedges. 194 proven. 564 refuted. 0 times theorem prover too weak. 3146 trivial. 0 not checked. [2020-07-21 16:03:33,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:35,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:35,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:35,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3904 backedges. 194 proven. 580 refuted. 0 times theorem prover too weak. 3130 trivial. 0 not checked. [2020-07-21 16:03:36,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168369259] [2020-07-21 16:03:36,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:36,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 16:03:36,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920752609] [2020-07-21 16:03:36,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:03:36,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:36,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:03:36,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:03:36,635 INFO L87 Difference]: Start difference. First operand 375 states and 612 transitions. Second operand 17 states. [2020-07-21 16:03:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:36,971 INFO L93 Difference]: Finished difference Result 387 states and 632 transitions. [2020-07-21 16:03:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:03:36,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 370 [2020-07-21 16:03:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:36,978 INFO L225 Difference]: With dead ends: 387 [2020-07-21 16:03:36,978 INFO L226 Difference]: Without dead ends: 383 [2020-07-21 16:03:36,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 712 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:03:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-07-21 16:03:36,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 339. [2020-07-21 16:03:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-07-21 16:03:37,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 545 transitions. [2020-07-21 16:03:37,001 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 545 transitions. Word has length 370 [2020-07-21 16:03:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:37,002 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 545 transitions. [2020-07-21 16:03:37,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:03:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 545 transitions. [2020-07-21 16:03:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 16:03:37,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:37,007 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 22, 22, 17, 16, 13, 13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 11, 10, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:37,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:37,221 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:37,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:37,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1128191889, now seen corresponding path program 30 times [2020-07-21 16:03:37,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:37,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632619954] [2020-07-21 16:03:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:37,853 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:37,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:37,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 16:03:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 129 proven. 661 refuted. 0 times theorem prover too weak. 2326 trivial. 0 not checked. [2020-07-21 16:03:38,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:40,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:40,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:40,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 129 proven. 685 refuted. 0 times theorem prover too weak. 2302 trivial. 0 not checked. [2020-07-21 16:03:41,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632619954] [2020-07-21 16:03:41,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:41,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 16:03:41,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200622407] [2020-07-21 16:03:41,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 16:03:41,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:41,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 16:03:41,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 16:03:41,913 INFO L87 Difference]: Start difference. First operand 339 states and 545 transitions. Second operand 19 states. [2020-07-21 16:03:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:42,310 INFO L93 Difference]: Finished difference Result 370 states and 603 transitions. [2020-07-21 16:03:42,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:03:42,312 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 334 [2020-07-21 16:03:42,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:42,317 INFO L225 Difference]: With dead ends: 370 [2020-07-21 16:03:42,317 INFO L226 Difference]: Without dead ends: 366 [2020-07-21 16:03:42,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 635 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 16:03:42,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-07-21 16:03:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 305. [2020-07-21 16:03:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-07-21 16:03:42,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 486 transitions. [2020-07-21 16:03:42,341 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 486 transitions. Word has length 334 [2020-07-21 16:03:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:42,342 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 486 transitions. [2020-07-21 16:03:42,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 16:03:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 486 transitions. [2020-07-21 16:03:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-07-21 16:03:42,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:42,346 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 17, 16, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 12, 8, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:42,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:42,560 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:42,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2074851183, now seen corresponding path program 31 times [2020-07-21 16:03:42,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:42,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675432326] [2020-07-21 16:03:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:43,121 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:43,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:03:43,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 235 proven. 391 refuted. 0 times theorem prover too weak. 2986 trivial. 0 not checked. [2020-07-21 16:03:43,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:44,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:45,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:45,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:45,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:45,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:45,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:45,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 235 proven. 401 refuted. 0 times theorem prover too weak. 2976 trivial. 0 not checked. [2020-07-21 16:03:45,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675432326] [2020-07-21 16:03:45,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:45,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 16:03:45,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833234565] [2020-07-21 16:03:45,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 16:03:45,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:45,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 16:03:45,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:03:45,929 INFO L87 Difference]: Start difference. First operand 305 states and 486 transitions. Second operand 15 states. [2020-07-21 16:03:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:46,229 INFO L93 Difference]: Finished difference Result 374 states and 637 transitions. [2020-07-21 16:03:46,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:03:46,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 358 [2020-07-21 16:03:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:46,237 INFO L225 Difference]: With dead ends: 374 [2020-07-21 16:03:46,237 INFO L226 Difference]: Without dead ends: 370 [2020-07-21 16:03:46,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 691 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:03:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-07-21 16:03:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 308. [2020-07-21 16:03:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-21 16:03:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 500 transitions. [2020-07-21 16:03:46,267 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 500 transitions. Word has length 358 [2020-07-21 16:03:46,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:46,268 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 500 transitions. [2020-07-21 16:03:46,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 16:03:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 500 transitions. [2020-07-21 16:03:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-21 16:03:46,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:46,273 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 17, 16, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 12, 12, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:46,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:46,488 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2017059741, now seen corresponding path program 32 times [2020-07-21 16:03:46,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:46,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732653140] [2020-07-21 16:03:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:47,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:47,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:47,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:03:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4120 backedges. 369 proven. 297 refuted. 0 times theorem prover too weak. 3454 trivial. 0 not checked. [2020-07-21 16:03:47,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:48,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:48,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:49,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:49,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:49,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:49,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:49,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4120 backedges. 371 proven. 305 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-07-21 16:03:50,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732653140] [2020-07-21 16:03:50,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:50,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 16:03:50,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544547635] [2020-07-21 16:03:50,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 16:03:50,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:50,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 16:03:50,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:03:50,049 INFO L87 Difference]: Start difference. First operand 308 states and 500 transitions. Second operand 15 states. [2020-07-21 16:03:50,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:50,351 INFO L93 Difference]: Finished difference Result 347 states and 599 transitions. [2020-07-21 16:03:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:03:50,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 382 [2020-07-21 16:03:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:50,356 INFO L225 Difference]: With dead ends: 347 [2020-07-21 16:03:50,356 INFO L226 Difference]: Without dead ends: 343 [2020-07-21 16:03:50,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 739 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:03:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-07-21 16:03:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 311. [2020-07-21 16:03:50,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-07-21 16:03:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 514 transitions. [2020-07-21 16:03:50,373 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 514 transitions. Word has length 382 [2020-07-21 16:03:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:50,373 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 514 transitions. [2020-07-21 16:03:50,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 16:03:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 514 transitions. [2020-07-21 16:03:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 16:03:50,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:50,376 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 17, 16, 15, 15, 15, 15, 15, 15, 15, 14, 12, 12, 12, 12, 12, 12, 12, 8, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:50,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:50,578 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:50,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1705704948, now seen corresponding path program 33 times [2020-07-21 16:03:50,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:50,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811259793] [2020-07-21 16:03:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:51,140 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:51,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:51,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:03:51,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3880 backedges. 261 proven. 509 refuted. 0 times theorem prover too weak. 3110 trivial. 0 not checked. [2020-07-21 16:03:51,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:52,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:53,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:53,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:53,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:53,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:53,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:53,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:53,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:54,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3880 backedges. 263 proven. 523 refuted. 0 times theorem prover too weak. 3094 trivial. 0 not checked. [2020-07-21 16:03:54,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811259793] [2020-07-21 16:03:54,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:54,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 16:03:54,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622292228] [2020-07-21 16:03:54,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:03:54,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:54,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:03:54,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:03:54,267 INFO L87 Difference]: Start difference. First operand 311 states and 514 transitions. Second operand 17 states. [2020-07-21 16:03:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:54,606 INFO L93 Difference]: Finished difference Result 385 states and 689 transitions. [2020-07-21 16:03:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:03:54,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 370 [2020-07-21 16:03:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:54,613 INFO L225 Difference]: With dead ends: 385 [2020-07-21 16:03:54,613 INFO L226 Difference]: Without dead ends: 381 [2020-07-21 16:03:54,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 711 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:03:54,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-07-21 16:03:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 313. [2020-07-21 16:03:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-07-21 16:03:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 518 transitions. [2020-07-21 16:03:54,630 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 518 transitions. Word has length 370 [2020-07-21 16:03:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:54,630 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 518 transitions. [2020-07-21 16:03:54,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:03:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 518 transitions. [2020-07-21 16:03:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-07-21 16:03:54,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:54,634 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 27, 27, 17, 16, 15, 15, 15, 15, 15, 15, 15, 14, 13, 13, 13, 13, 13, 13, 13, 10, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:54,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:54,841 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash -956021409, now seen corresponding path program 34 times [2020-07-21 16:03:54,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:54,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418400118] [2020-07-21 16:03:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:55,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:55,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:03:55,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4132 backedges. 380 proven. 416 refuted. 0 times theorem prover too weak. 3336 trivial. 0 not checked. [2020-07-21 16:03:55,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:03:57,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:57,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:57,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:57,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:57,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:03:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4132 backedges. 382 proven. 430 refuted. 0 times theorem prover too weak. 3320 trivial. 0 not checked. [2020-07-21 16:03:58,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418400118] [2020-07-21 16:03:58,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:03:58,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 16:03:58,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246902490] [2020-07-21 16:03:58,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:03:58,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:03:58,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:03:58,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:03:58,673 INFO L87 Difference]: Start difference. First operand 313 states and 518 transitions. Second operand 17 states. [2020-07-21 16:03:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:03:58,994 INFO L93 Difference]: Finished difference Result 360 states and 649 transitions. [2020-07-21 16:03:58,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:03:58,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 382 [2020-07-21 16:03:58,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:03:59,001 INFO L225 Difference]: With dead ends: 360 [2020-07-21 16:03:59,001 INFO L226 Difference]: Without dead ends: 356 [2020-07-21 16:03:59,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 735 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:03:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-07-21 16:03:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 318. [2020-07-21 16:03:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-07-21 16:03:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 536 transitions. [2020-07-21 16:03:59,022 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 536 transitions. Word has length 382 [2020-07-21 16:03:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:03:59,023 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 536 transitions. [2020-07-21 16:03:59,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:03:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 536 transitions. [2020-07-21 16:03:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 16:03:59,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:03:59,027 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 26, 26, 17, 16, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 10, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:03:59,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:59,241 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:03:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:03:59,242 INFO L82 PathProgramCache]: Analyzing trace with hash -225983386, now seen corresponding path program 35 times [2020-07-21 16:03:59,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:03:59,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374431357] [2020-07-21 16:03:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:03:59,842 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:03:59,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:03:59,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 16:03:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:03:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 344 proven. 300 refuted. 0 times theorem prover too weak. 3212 trivial. 0 not checked. [2020-07-21 16:03:59,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:01,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:01,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:01,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:01,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:01,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:01,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:01,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:01,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:01,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3856 backedges. 344 proven. 312 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2020-07-21 16:04:02,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374431357] [2020-07-21 16:04:02,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:02,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 16:04:02,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498786634] [2020-07-21 16:04:02,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 16:04:02,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:02,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 16:04:02,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:04:02,434 INFO L87 Difference]: Start difference. First operand 318 states and 536 transitions. Second operand 15 states. [2020-07-21 16:04:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:02,714 INFO L93 Difference]: Finished difference Result 367 states and 671 transitions. [2020-07-21 16:04:02,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:04:02,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 370 [2020-07-21 16:04:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:02,720 INFO L225 Difference]: With dead ends: 367 [2020-07-21 16:04:02,720 INFO L226 Difference]: Without dead ends: 363 [2020-07-21 16:04:02,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 715 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:04:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-07-21 16:04:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 315. [2020-07-21 16:04:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-07-21 16:04:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 522 transitions. [2020-07-21 16:04:02,739 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 522 transitions. Word has length 370 [2020-07-21 16:04:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:02,739 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 522 transitions. [2020-07-21 16:04:02,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 16:04:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 522 transitions. [2020-07-21 16:04:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 16:04:02,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:02,743 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 17, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:02,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:02,956 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:02,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:02,957 INFO L82 PathProgramCache]: Analyzing trace with hash -562964090, now seen corresponding path program 36 times [2020-07-21 16:04:02,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:02,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555139400] [2020-07-21 16:04:02,957 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:03,610 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:04:03,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:03,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 16:04:03,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4404 backedges. 627 proven. 195 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2020-07-21 16:04:03,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:05,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:05,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:06,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4404 backedges. 631 proven. 207 refuted. 0 times theorem prover too weak. 3566 trivial. 0 not checked. [2020-07-21 16:04:07,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555139400] [2020-07-21 16:04:07,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:07,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 16:04:07,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140418835] [2020-07-21 16:04:07,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 16:04:07,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:07,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 16:04:07,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:04:07,054 INFO L87 Difference]: Start difference. First operand 315 states and 522 transitions. Second operand 17 states. [2020-07-21 16:04:07,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:07,387 INFO L93 Difference]: Finished difference Result 340 states and 589 transitions. [2020-07-21 16:04:07,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 16:04:07,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 394 [2020-07-21 16:04:07,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:07,392 INFO L225 Difference]: With dead ends: 340 [2020-07-21 16:04:07,392 INFO L226 Difference]: Without dead ends: 336 [2020-07-21 16:04:07,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 759 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 16:04:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-07-21 16:04:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2020-07-21 16:04:07,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-07-21 16:04:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 569 transitions. [2020-07-21 16:04:07,408 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 569 transitions. Word has length 394 [2020-07-21 16:04:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:07,409 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 569 transitions. [2020-07-21 16:04:07,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 16:04:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 569 transitions. [2020-07-21 16:04:07,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 16:04:07,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:07,412 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 17, 16, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:07,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:07,613 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:07,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:07,614 INFO L82 PathProgramCache]: Analyzing trace with hash -892238268, now seen corresponding path program 37 times [2020-07-21 16:04:07,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:07,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019241468] [2020-07-21 16:04:07,615 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:08,203 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:04:08,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:08,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 16:04:08,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4412 backedges. 172 proven. 886 refuted. 0 times theorem prover too weak. 3354 trivial. 0 not checked. [2020-07-21 16:04:08,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:11,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:11,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:12,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:12,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:12,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4412 backedges. 172 proven. 916 refuted. 0 times theorem prover too weak. 3324 trivial. 0 not checked. [2020-07-21 16:04:13,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019241468] [2020-07-21 16:04:13,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:13,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 16:04:13,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510217691] [2020-07-21 16:04:13,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 16:04:13,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:13,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 16:04:13,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 16:04:13,891 INFO L87 Difference]: Start difference. First operand 328 states and 569 transitions. Second operand 21 states. [2020-07-21 16:04:14,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:14,389 INFO L93 Difference]: Finished difference Result 348 states and 613 transitions. [2020-07-21 16:04:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:04:14,391 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 394 [2020-07-21 16:04:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:14,395 INFO L225 Difference]: With dead ends: 348 [2020-07-21 16:04:14,395 INFO L226 Difference]: Without dead ends: 344 [2020-07-21 16:04:14,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 751 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:04:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-07-21 16:04:14,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 313. [2020-07-21 16:04:14,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-07-21 16:04:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 537 transitions. [2020-07-21 16:04:14,411 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 537 transitions. Word has length 394 [2020-07-21 16:04:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:14,412 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 537 transitions. [2020-07-21 16:04:14,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 16:04:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 537 transitions. [2020-07-21 16:04:14,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 16:04:14,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:14,415 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 25, 24, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:14,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:14,616 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:14,617 INFO L82 PathProgramCache]: Analyzing trace with hash -369872421, now seen corresponding path program 38 times [2020-07-21 16:04:14,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:14,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445816909] [2020-07-21 16:04:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:15,223 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:04:15,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:15,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:04:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6288 backedges. 3451 proven. 592 refuted. 0 times theorem prover too weak. 2245 trivial. 0 not checked. [2020-07-21 16:04:15,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:19,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:19,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:21,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:21,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:22,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:22,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:22,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:22,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:22,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:22,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:22,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6288 backedges. 541 proven. 1399 refuted. 0 times theorem prover too weak. 4348 trivial. 0 not checked. [2020-07-21 16:04:22,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445816909] [2020-07-21 16:04:22,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:22,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-21 16:04:22,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462286505] [2020-07-21 16:04:22,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 16:04:22,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:22,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 16:04:22,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:04:22,816 INFO L87 Difference]: Start difference. First operand 313 states and 537 transitions. Second operand 29 states. [2020-07-21 16:04:24,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:24,693 INFO L93 Difference]: Finished difference Result 638 states and 1118 transitions. [2020-07-21 16:04:24,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 16:04:24,695 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 470 [2020-07-21 16:04:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:24,699 INFO L225 Difference]: With dead ends: 638 [2020-07-21 16:04:24,699 INFO L226 Difference]: Without dead ends: 331 [2020-07-21 16:04:24,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 889 SyntacticMatches, 23 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=373, Invalid=1979, Unknown=0, NotChecked=0, Total=2352 [2020-07-21 16:04:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-07-21 16:04:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 305. [2020-07-21 16:04:24,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-07-21 16:04:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 499 transitions. [2020-07-21 16:04:24,716 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 499 transitions. Word has length 470 [2020-07-21 16:04:24,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:24,716 INFO L479 AbstractCegarLoop]: Abstraction has 305 states and 499 transitions. [2020-07-21 16:04:24,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 16:04:24,717 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 499 transitions. [2020-07-21 16:04:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 16:04:24,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:24,720 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 23, 23, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 14, 13, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:24,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:24,922 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:24,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1258969067, now seen corresponding path program 39 times [2020-07-21 16:04:24,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:24,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967010909] [2020-07-21 16:04:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:25,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:04:25,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:25,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 16:04:25,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6914 backedges. 1014 proven. 1056 refuted. 0 times theorem prover too weak. 4844 trivial. 0 not checked. [2020-07-21 16:04:26,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:28,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:29,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:29,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:29,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:29,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:29,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:29,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:29,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:31,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:31,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:32,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6914 backedges. 1018 proven. 1082 refuted. 0 times theorem prover too weak. 4814 trivial. 0 not checked. [2020-07-21 16:04:33,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967010909] [2020-07-21 16:04:33,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:33,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 27] total 31 [2020-07-21 16:04:33,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648580450] [2020-07-21 16:04:33,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 16:04:33,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 16:04:33,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2020-07-21 16:04:33,636 INFO L87 Difference]: Start difference. First operand 305 states and 499 transitions. Second operand 31 states. [2020-07-21 16:04:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:35,880 INFO L93 Difference]: Finished difference Result 654 states and 1114 transitions. [2020-07-21 16:04:35,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 16:04:35,882 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 491 [2020-07-21 16:04:35,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:35,887 INFO L225 Difference]: With dead ends: 654 [2020-07-21 16:04:35,887 INFO L226 Difference]: Without dead ends: 343 [2020-07-21 16:04:35,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 927 SyntacticMatches, 25 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=437, Invalid=2425, Unknown=0, NotChecked=0, Total=2862 [2020-07-21 16:04:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-07-21 16:04:35,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 310. [2020-07-21 16:04:35,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2020-07-21 16:04:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 486 transitions. [2020-07-21 16:04:35,911 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 486 transitions. Word has length 491 [2020-07-21 16:04:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:35,912 INFO L479 AbstractCegarLoop]: Abstraction has 310 states and 486 transitions. [2020-07-21 16:04:35,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 16:04:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 486 transitions. [2020-07-21 16:04:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 730 [2020-07-21 16:04:35,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:35,920 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 49, 49, 40, 40, 29, 29, 29, 29, 29, 29, 29, 24, 24, 24, 24, 24, 24, 24, 18, 16, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:36,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:36,135 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:36,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:36,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1497861486, now seen corresponding path program 40 times [2020-07-21 16:04:36,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:36,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183584262] [2020-07-21 16:04:36,136 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:36,932 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:04:36,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:36,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 16:04:36,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15604 backedges. 1279 proven. 2749 refuted. 0 times theorem prover too weak. 11576 trivial. 0 not checked. [2020-07-21 16:04:37,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:04:43,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:43,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:44,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:45,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:45,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:46,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:46,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:46,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:46,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:46,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:46,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:49,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:49,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:50,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:50,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:51,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:51,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:51,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:51,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:52,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:04:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15604 backedges. 1279 proven. 2806 refuted. 0 times theorem prover too weak. 11519 trivial. 0 not checked. [2020-07-21 16:04:52,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183584262] [2020-07-21 16:04:52,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:04:52,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 33] total 39 [2020-07-21 16:04:52,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368300023] [2020-07-21 16:04:52,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-21 16:04:52,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:04:52,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-21 16:04:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 16:04:52,334 INFO L87 Difference]: Start difference. First operand 310 states and 486 transitions. Second operand 39 states. [2020-07-21 16:04:57,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:04:57,539 INFO L93 Difference]: Finished difference Result 774 states and 1479 transitions. [2020-07-21 16:04:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-21 16:04:57,541 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 729 [2020-07-21 16:04:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:04:57,546 INFO L225 Difference]: With dead ends: 774 [2020-07-21 16:04:57,546 INFO L226 Difference]: Without dead ends: 468 [2020-07-21 16:04:57,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1495 GetRequests, 1391 SyntacticMatches, 29 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=835, Invalid=5017, Unknown=0, NotChecked=0, Total=5852 [2020-07-21 16:04:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-07-21 16:04:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 412. [2020-07-21 16:04:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-07-21 16:04:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 757 transitions. [2020-07-21 16:04:57,570 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 757 transitions. Word has length 729 [2020-07-21 16:04:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:04:57,570 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 757 transitions. [2020-07-21 16:04:57,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-21 16:04:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 757 transitions. [2020-07-21 16:04:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2020-07-21 16:04:57,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:04:57,580 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 56, 56, 38, 37, 30, 30, 30, 30, 30, 30, 30, 28, 28, 28, 28, 28, 28, 28, 24, 18, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:04:57,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:57,781 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:04:57,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:04:57,782 INFO L82 PathProgramCache]: Analyzing trace with hash 987302185, now seen corresponding path program 41 times [2020-07-21 16:04:57,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:04:57,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586111979] [2020-07-21 16:04:57,783 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:04:58,603 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:04:58,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:04:58,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 16:04:58,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:04:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18101 backedges. 9644 proven. 953 refuted. 0 times theorem prover too weak. 7504 trivial. 0 not checked. [2020-07-21 16:04:59,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:05,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:06,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:06,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:06,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:06,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:08,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:08,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:08,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:09,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:09,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:09,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:09,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:05:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18101 backedges. 852 proven. 2370 refuted. 0 times theorem prover too weak. 14879 trivial. 0 not checked. [2020-07-21 16:05:09,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586111979] [2020-07-21 16:05:09,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:05:09,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23] total 27 [2020-07-21 16:05:09,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762299802] [2020-07-21 16:05:09,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 16:05:09,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:05:09,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 16:05:09,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-21 16:05:09,729 INFO L87 Difference]: Start difference. First operand 412 states and 757 transitions. Second operand 27 states. [2020-07-21 16:05:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:05:12,264 INFO L93 Difference]: Finished difference Result 981 states and 2000 transitions. [2020-07-21 16:05:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 16:05:12,266 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 784 [2020-07-21 16:05:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:05:12,273 INFO L225 Difference]: With dead ends: 981 [2020-07-21 16:05:12,274 INFO L226 Difference]: Without dead ends: 559 [2020-07-21 16:05:12,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1590 GetRequests, 1521 SyntacticMatches, 21 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=408, Invalid=2042, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 16:05:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2020-07-21 16:05:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 482. [2020-07-21 16:05:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 482 states. [2020-07-21 16:05:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 944 transitions. [2020-07-21 16:05:12,305 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 944 transitions. Word has length 784 [2020-07-21 16:05:12,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:05:12,305 INFO L479 AbstractCegarLoop]: Abstraction has 482 states and 944 transitions. [2020-07-21 16:05:12,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 16:05:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 944 transitions. [2020-07-21 16:05:12,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2020-07-21 16:05:12,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:05:12,311 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 40, 40, 27, 27, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 16, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:05:12,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:12,512 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:05:12,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:05:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2100162958, now seen corresponding path program 42 times [2020-07-21 16:05:12,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:05:12,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550389176] [2020-07-21 16:05:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:05:13,329 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:05:13,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:05:13,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1246 conjuncts, 168 conjunts are in the unsatisfiable core [2020-07-21 16:05:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:05:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9034 backedges. 1537 proven. 1525 refuted. 0 times theorem prover too weak. 5972 trivial. 0 not checked. [2020-07-21 16:05:14,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:05:16,335 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:05:16,488 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:05:16,653 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:05:16,816 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:05:17,719 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:05:18,151 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 16:05:18,492 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 16:05:18,852 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 16:05:19,212 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 16:05:20,192 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:05:21,327 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:05:21,558 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:05:21,782 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:05:22,015 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:05:22,798 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-07-21 16:05:23,586 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-07-21 16:05:24,361 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 16:05:25,225 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 16:05:26,137 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:05:26,247 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:05:26,351 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:05:27,473 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:05:27,706 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:05:27,949 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:05:28,177 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:05:29,422 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:05:29,816 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:05:30,210 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:05:30,615 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:05:32,561 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 374 [2020-07-21 16:05:34,406 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 374 [2020-07-21 16:05:36,357 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 376 [2020-07-21 16:05:38,273 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 376 [2020-07-21 16:05:39,438 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:05:39,572 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:05:39,694 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:05:39,809 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:05:40,636 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:05:41,100 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:05:41,358 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:05:41,636 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:05:41,903 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:05:42,680 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:05:42,893 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:05:43,004 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:05:43,452 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:05:43,916 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:05:44,369 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:05:44,812 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:05:45,306 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-07-21 16:05:45,788 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-07-21 16:05:46,251 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-07-21 16:05:46,693 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 194 [2020-07-21 16:05:47,122 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-21 16:05:47,551 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 16:05:47,978 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-21 16:05:48,445 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-07-21 16:05:48,809 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 16:05:49,177 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-07-21 16:05:49,528 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-07-21 16:05:49,898 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 16:05:50,276 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-07-21 16:05:50,649 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-21 16:05:51,004 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 16:05:51,357 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-21 16:05:51,705 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 16:05:52,038 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 16:05:52,363 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-07-21 16:05:52,653 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-07-21 16:05:52,939 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 16:05:53,214 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 16:05:53,471 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-07-21 16:05:53,719 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-21 16:05:53,963 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 16:05:54,197 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-07-21 16:05:54,364 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-07-21 16:05:54,525 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 16:05:54,684 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-21 16:05:54,835 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 16:05:54,985 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-21 16:05:55,125 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 16:05:55,260 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:05:55,413 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 16:05:55,583 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 16:05:55,748 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 16:05:55,904 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 16:05:56,076 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 16:05:56,236 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 16:05:56,379 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 16:05:56,509 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:05:56,638 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 16:05:56,762 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 16:05:56,878 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:05:56,993 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 16:05:57,103 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 16:05:57,206 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 16:05:58,936 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:05:59,238 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 16:06:02,427 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:02,546 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:02,673 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:02,801 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:03,880 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:06:04,154 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:06:04,424 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:06:04,701 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:06:04,982 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:06:06,184 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:06:09,730 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:09,857 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:09,992 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:10,123 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:13,305 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:06:14,382 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:06:14,579 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:06:14,787 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:06:14,997 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:06:16,099 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:16,225 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:16,380 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:16,510 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:16,924 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 16:06:17,352 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 16:06:17,838 WARN L193 SmtUtils]: Spent 481.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 16:06:18,278 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 16:06:19,514 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:19,642 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:19,786 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:19,931 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:20,793 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:06:20,900 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:06:21,025 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:06:21,148 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:06:21,436 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:06:21,711 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:06:21,993 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:06:22,284 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:06:23,218 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-07-21 16:06:24,137 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification that was a NOOP. DAG size: 230 [2020-07-21 16:06:25,105 WARN L193 SmtUtils]: Spent 961.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 16:06:26,074 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 16:06:27,431 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:27,562 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:27,702 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:27,845 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:28,873 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:06:28,992 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:06:29,116 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:06:29,244 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:06:29,553 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:06:29,866 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:06:30,185 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:06:30,495 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:06:30,828 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-07-21 16:06:31,123 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-21 16:06:31,408 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 16:06:31,688 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-07-21 16:06:31,961 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-07-21 16:06:32,240 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-21 16:06:32,496 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 16:06:32,763 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:06:33,007 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-07-21 16:06:33,255 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 16:06:33,504 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 16:06:33,717 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 16:06:33,929 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:06:34,132 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 16:06:34,326 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 16:06:34,510 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 16:06:34,700 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 16:06:34,878 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:06:35,052 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 16:06:35,217 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:06:35,375 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:06:35,527 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 16:06:35,675 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:06:35,815 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:06:35,949 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:06:36,075 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:06:36,193 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 16:06:36,304 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:06:36,409 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:06:37,921 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:06:38,042 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:06:38,176 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:06:38,308 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:06:38,443 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 16:06:38,565 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:06:38,684 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:06:38,795 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:06:42,520 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:42,671 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:42,844 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:43,002 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:46,566 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:06:46,688 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:06:46,828 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:06:46,965 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:06:47,724 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:06:48,019 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:06:48,277 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:06:48,517 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:06:48,776 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:06:49,034 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:06:50,356 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:50,521 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:50,689 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:50,853 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:51,342 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 16:06:51,829 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 16:06:52,354 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 16:06:52,874 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 16:06:54,535 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:54,695 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:06:54,864 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:55,021 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:06:55,193 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 16:06:55,349 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 16:06:55,498 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:06:55,636 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 16:06:55,779 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 16:06:55,907 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 16:06:56,018 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 16:06:56,228 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 16:07:00,533 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:00,662 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:00,796 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:00,927 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:01,873 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:07:01,985 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:07:02,239 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:07:02,490 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:07:02,783 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:07:03,121 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:07:04,308 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:07:04,419 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:07:04,524 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:07:04,633 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:07:04,748 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 16:07:04,851 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 16:07:07,711 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:07,826 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:07,951 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:08,076 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9034 backedges. 1667 proven. 1462 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2020-07-21 16:07:11,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550389176] [2020-07-21 16:07:11,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:07:11,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 48] total 70 [2020-07-21 16:07:11,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793768883] [2020-07-21 16:07:11,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-21 16:07:11,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:07:11,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-21 16:07:11,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=4298, Unknown=0, NotChecked=0, Total=4830 [2020-07-21 16:07:11,067 INFO L87 Difference]: Start difference. First operand 482 states and 944 transitions. Second operand 70 states. [2020-07-21 16:07:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:07:21,497 INFO L93 Difference]: Finished difference Result 1375 states and 5081 transitions. [2020-07-21 16:07:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-07-21 16:07:21,502 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 559 [2020-07-21 16:07:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:07:21,542 INFO L225 Difference]: With dead ends: 1375 [2020-07-21 16:07:21,543 INFO L226 Difference]: Without dead ends: 1369 [2020-07-21 16:07:21,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 937 SyntacticMatches, 112 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10677 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=2021, Invalid=13981, Unknown=0, NotChecked=0, Total=16002 [2020-07-21 16:07:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2020-07-21 16:07:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1081. [2020-07-21 16:07:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1081 states. [2020-07-21 16:07:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 4608 transitions. [2020-07-21 16:07:21,705 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 4608 transitions. Word has length 559 [2020-07-21 16:07:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:07:21,706 INFO L479 AbstractCegarLoop]: Abstraction has 1081 states and 4608 transitions. [2020-07-21 16:07:21,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-21 16:07:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 4608 transitions. [2020-07-21 16:07:21,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 16:07:21,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:07:21,740 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:07:21,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:07:21,941 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:07:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:07:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash 516830041, now seen corresponding path program 43 times [2020-07-21 16:07:21,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:07:21,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896534764] [2020-07-21 16:07:21,943 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:07:23,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:07:23,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:07:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 140 conjunts are in the unsatisfiable core [2020-07-21 16:07:23,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:07:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1154 proven. 1090 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2020-07-21 16:07:26,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:07:27,251 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:27,365 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:27,487 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:27,609 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:28,413 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:07:28,648 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:07:28,926 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:07:29,177 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:07:30,346 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:30,498 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:30,632 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:30,764 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:31,194 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:07:31,619 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:07:32,061 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 16:07:32,511 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 16:07:33,610 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:33,756 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:33,899 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:34,053 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:34,976 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:07:35,220 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:07:35,477 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:07:35,771 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:07:36,643 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 16:07:37,454 WARN L193 SmtUtils]: Spent 807.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 16:07:38,298 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 16:07:39,153 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 16:07:40,383 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:40,525 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:40,681 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:40,852 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:41,860 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:07:42,115 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:07:42,394 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:07:42,671 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:07:44,398 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:07:44,590 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:07:44,795 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:07:44,996 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:07:45,512 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 16:07:46,033 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 16:07:46,576 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:07:47,126 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:07:48,845 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 311 [2020-07-21 16:07:50,720 WARN L193 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 311 [2020-07-21 16:07:52,666 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 313 [2020-07-21 16:07:55,280 WARN L193 SmtUtils]: Spent 2.61 s on a formula simplification that was a NOOP. DAG size: 313 [2020-07-21 16:07:56,861 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:57,024 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:07:57,219 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:57,393 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:07:58,250 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:07:58,536 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:07:58,830 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:07:59,120 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:07:59,428 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:08:00,992 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:08:01,147 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:08:01,315 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:08:01,486 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:08:02,030 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 16:08:02,606 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 16:08:03,197 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:08:03,728 WARN L193 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:08:04,321 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-07-21 16:08:04,906 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-07-21 16:08:05,508 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 16:08:06,056 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-07-21 16:08:06,600 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-21 16:08:07,162 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-07-21 16:08:07,688 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 16:08:08,217 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-07-21 16:08:08,714 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-07-21 16:08:09,217 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-21 16:08:09,687 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-07-21 16:08:10,187 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-07-21 16:08:10,636 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-21 16:08:11,077 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-07-21 16:08:11,524 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-07-21 16:08:11,969 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-21 16:08:12,380 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:08:12,797 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-21 16:08:13,198 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 16:08:13,583 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:08:13,952 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-21 16:08:14,318 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-21 16:08:14,687 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-21 16:08:15,038 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 16:08:15,377 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-21 16:08:15,697 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 16:08:16,013 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 16:08:16,308 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 16:08:16,586 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 16:08:16,852 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 16:08:17,105 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 16:08:17,348 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 16:08:17,573 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 16:08:17,798 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:08:18,001 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 16:08:18,207 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 16:08:18,398 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 16:08:18,565 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 16:08:18,723 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:08:18,882 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:08:19,041 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 16:08:19,194 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:08:19,328 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:19,456 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:08:19,565 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:08:20,750 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:21,843 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:08:22,046 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:08:22,264 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:08:22,502 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:08:22,738 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 16:08:22,973 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 16:08:23,179 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:08:23,362 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 16:08:23,555 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:08:23,723 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:08:23,876 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 16:08:24,019 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 16:08:24,156 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:08:24,288 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:24,426 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:08:24,538 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:08:24,661 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 16:08:25,689 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:08:27,814 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:08:28,130 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:29,840 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:08:30,041 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:30,722 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:30,918 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:31,119 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:31,321 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:32,072 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:08:32,185 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:32,293 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:32,618 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:08:32,935 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:08:33,267 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:08:33,584 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:08:34,453 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:08:34,670 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:34,873 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:08:36,431 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:08:36,637 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:37,322 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:37,521 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:37,712 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:37,897 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:41,384 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:41,996 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:42,184 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:42,365 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:42,550 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:43,344 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:43,467 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:43,799 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:08:44,124 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:08:44,470 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:08:44,788 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:08:45,402 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:08:45,509 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:08:45,621 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:45,728 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:46,328 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:46,514 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:46,691 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:46,842 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:47,276 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:08:47,709 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:08:48,145 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 16:08:48,699 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 16:08:49,521 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:49,628 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:50,225 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:50,398 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:50,605 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:50,785 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:51,698 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:52,020 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:08:52,344 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:08:52,662 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:08:52,967 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:08:54,064 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 16:08:55,152 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 185 [2020-07-21 16:08:56,321 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 16:08:57,442 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 16:08:58,377 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:08:58,489 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:08:58,619 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:58,731 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:08:59,361 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:59,533 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:08:59,731 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:08:59,936 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:00,601 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:00,712 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:00,826 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:00,953 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:01,278 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:09:01,615 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:09:01,950 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:09:02,305 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:09:02,668 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-21 16:09:03,009 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:09:03,302 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 16:09:03,593 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-21 16:09:03,872 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 16:09:04,158 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 16:09:04,424 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:09:04,679 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 16:09:04,924 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 16:09:05,159 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 16:09:05,386 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 16:09:05,597 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 16:09:05,800 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 16:09:05,996 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 16:09:06,178 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:09:06,346 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:09:06,494 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:06,636 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:09:06,766 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 16:09:06,893 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:09:07,007 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 16:09:07,824 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:07,938 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:08,063 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:08,189 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:08,310 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:09:10,059 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:10,171 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:10,288 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:10,938 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:11,127 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:11,334 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:11,532 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:13,081 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:13,294 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:13,412 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:15,061 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:15,275 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:15,393 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:16,036 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:16,220 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:16,423 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:16,627 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:17,285 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:17,402 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:17,532 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:17,661 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:17,988 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:09:18,356 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:09:18,715 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:09:19,066 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:09:19,752 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:19,875 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:19,996 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:20,116 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:20,758 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:20,948 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:21,163 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:21,378 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:21,981 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:09:22,561 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:09:23,145 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 16:09:23,780 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-07-21 16:09:24,662 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:24,771 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:24,891 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:25,011 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:25,668 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:25,866 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:26,061 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:26,259 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:26,465 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:09:26,649 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 16:09:26,826 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 16:09:26,986 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:09:27,139 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 16:09:27,272 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:27,408 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:09:27,528 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 16:09:27,643 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 16:09:30,854 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:30,969 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:31,599 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:31,793 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:32,013 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:32,217 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:32,892 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:33,115 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:33,229 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:33,563 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:09:33,910 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:09:34,261 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:09:34,602 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:09:35,568 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:35,675 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:35,795 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:35,915 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:36,023 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:09:37,811 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:37,935 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:38,060 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:38,189 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:38,883 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:39,093 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:09:39,314 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:39,536 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:09:41,424 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:41,537 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:09:41,665 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:41,820 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1154 proven. 1086 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2020-07-21 16:09:43,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896534764] [2020-07-21 16:09:43,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:09:43,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 59 [2020-07-21 16:09:43,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833445182] [2020-07-21 16:09:43,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-21 16:09:43,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:09:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-21 16:09:43,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=3028, Unknown=0, NotChecked=0, Total=3422 [2020-07-21 16:09:43,043 INFO L87 Difference]: Start difference. First operand 1081 states and 4608 transitions. Second operand 59 states. [2020-07-21 16:09:53,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:09:53,428 INFO L93 Difference]: Finished difference Result 1977 states and 12698 transitions. [2020-07-21 16:09:53,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-07-21 16:09:53,436 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 475 [2020-07-21 16:09:53,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:09:53,596 INFO L225 Difference]: With dead ends: 1977 [2020-07-21 16:09:53,597 INFO L226 Difference]: Without dead ends: 1973 [2020-07-21 16:09:53,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 787 SyntacticMatches, 105 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7798 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=1350, Invalid=9156, Unknown=0, NotChecked=0, Total=10506 [2020-07-21 16:09:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2020-07-21 16:09:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1486. [2020-07-21 16:09:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1486 states. [2020-07-21 16:09:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 10350 transitions. [2020-07-21 16:09:54,129 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 10350 transitions. Word has length 475 [2020-07-21 16:09:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:09:54,129 INFO L479 AbstractCegarLoop]: Abstraction has 1486 states and 10350 transitions. [2020-07-21 16:09:54,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-21 16:09:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 10350 transitions. [2020-07-21 16:09:54,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 633 [2020-07-21 16:09:54,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:09:54,172 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 34, 33, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 13, 13, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:09:54,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:09:54,374 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:09:54,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:09:54,375 INFO L82 PathProgramCache]: Analyzing trace with hash -273935437, now seen corresponding path program 44 times [2020-07-21 16:09:54,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:09:54,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036018671] [2020-07-21 16:09:54,376 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:09:55,984 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:09:55,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:09:55,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 942 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 16:09:55,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:09:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11577 backedges. 6026 proven. 855 refuted. 0 times theorem prover too weak. 4696 trivial. 0 not checked. [2020-07-21 16:09:57,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:09:58,788 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:58,903 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:09:59,319 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 16:09:59,426 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 16:09:59,564 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:09:59,696 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:00,370 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:10:00,501 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:10:00,647 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:10:00,792 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:10:01,793 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 16:10:02,007 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:10:02,121 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:10:02,512 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 16:10:02,641 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 16:10:02,775 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:02,923 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:10,213 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:10,325 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:10,751 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 16:10:10,884 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 16:10:11,006 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:11,130 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:11,757 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:10:11,897 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:10:12,042 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:10:12,183 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:10:13,738 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 16:10:13,854 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 16:10:13,978 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:14,094 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:15,437 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:10:15,779 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 16:10:15,890 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 16:10:16,002 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:16,132 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:16,246 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 16:10:18,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:19,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:19,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:19,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:19,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:20,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:21,797 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:10:22,011 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:22,130 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:22,562 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 16:10:22,682 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 16:10:22,826 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:22,966 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:23,667 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:10:23,817 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:10:23,971 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:10:24,127 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:10:24,290 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:10:24,430 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:10:24,548 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 16:10:27,806 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:10:27,914 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:10:28,036 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:28,150 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:28,580 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 16:10:28,712 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 16:10:28,848 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:29,000 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 16:10:29,131 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 16:10:29,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:29,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:31,600 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:10:31,889 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:32,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:33,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:34,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:34,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:34,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:35,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:10:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11577 backedges. 918 proven. 1836 refuted. 0 times theorem prover too weak. 8823 trivial. 0 not checked. [2020-07-21 16:10:35,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036018671] [2020-07-21 16:10:35,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:10:35,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25] total 29 [2020-07-21 16:10:35,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359841875] [2020-07-21 16:10:35,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 16:10:35,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:10:35,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 16:10:35,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2020-07-21 16:10:35,597 INFO L87 Difference]: Start difference. First operand 1486 states and 10350 transitions. Second operand 29 states. [2020-07-21 16:10:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:10:43,066 INFO L93 Difference]: Finished difference Result 3076 states and 23923 transitions. [2020-07-21 16:10:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-21 16:10:43,075 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 632 [2020-07-21 16:10:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:10:43,177 INFO L225 Difference]: With dead ends: 3076 [2020-07-21 16:10:43,177 INFO L226 Difference]: Without dead ends: 1592 [2020-07-21 16:10:43,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1285 GetRequests, 1213 SyntacticMatches, 23 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=400, Invalid=2150, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 16:10:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2020-07-21 16:10:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1456. [2020-07-21 16:10:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1456 states. [2020-07-21 16:10:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 9806 transitions. [2020-07-21 16:10:43,668 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 9806 transitions. Word has length 632 [2020-07-21 16:10:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:10:43,668 INFO L479 AbstractCegarLoop]: Abstraction has 1456 states and 9806 transitions. [2020-07-21 16:10:43,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 16:10:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 9806 transitions. [2020-07-21 16:10:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-21 16:10:43,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:10:43,719 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 27, 27, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:10:43,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:10:43,935 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:10:43,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:10:43,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2101459575, now seen corresponding path program 45 times [2020-07-21 16:10:43,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:10:43,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142069698] [2020-07-21 16:10:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:10:45,690 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:10:45,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:10:45,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 156 conjunts are in the unsatisfiable core [2020-07-21 16:10:45,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:10:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7846 backedges. 942 proven. 1773 refuted. 0 times theorem prover too weak. 5131 trivial. 0 not checked. [2020-07-21 16:10:49,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:10:50,432 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:10:50,633 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:50,741 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:51,554 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:10:51,659 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:10:51,882 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:10:52,111 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:10:52,349 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:10:52,587 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:10:53,205 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:10:53,407 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:10:53,527 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:10:53,990 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 16:10:54,246 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:10:54,449 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:10:54,643 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:10:54,834 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:10:55,311 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:10:55,771 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:10:56,250 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:10:56,741 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:10:57,560 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:57,669 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:10:58,288 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:10:58,469 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:10:58,657 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:10:58,837 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:10:59,573 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:11:00,344 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:11:01,129 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:11:01,891 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:11:02,894 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:11:03,029 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:11:03,185 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:11:03,333 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:11:04,013 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:11:04,238 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:11:04,473 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:11:04,720 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:11:05,472 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:11:05,586 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:11:05,710 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:11:06,110 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:11:06,497 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:11:06,887 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:11:07,269 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:11:08,680 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 16:11:10,187 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 16:11:11,599 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 223 [2020-07-21 16:11:13,009 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 223 [2020-07-21 16:11:14,066 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:11:14,205 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:11:14,371 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:11:14,524 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:11:15,208 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:11:15,438 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:11:15,681 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:11:15,945 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:11:16,796 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:11:16,911 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:11:17,288 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:11:17,662 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:11:18,032 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:11:18,329 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:11:19,558 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:11:19,698 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:11:19,906 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:11:20,092 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:11:20,684 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 16:11:21,357 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 16:11:22,028 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:11:22,697 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:11:25,470 WARN L193 SmtUtils]: Spent 2.76 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-21 16:11:28,179 WARN L193 SmtUtils]: Spent 2.70 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-21 16:11:30,937 WARN L193 SmtUtils]: Spent 2.75 s on a formula simplification that was a NOOP. DAG size: 349 [2020-07-21 16:11:33,781 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 349 [2020-07-21 16:11:35,240 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:11:35,399 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:11:35,542 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:11:35,661 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:11:36,201 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:11:36,408 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:11:36,615 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:11:36,809 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:11:37,384 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:11:37,606 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:11:37,725 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:11:38,134 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:11:38,521 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:11:38,919 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:11:39,336 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:11:40,017 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:11:40,128 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:11:40,248 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:11:40,375 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:11:41,067 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:11:41,263 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:11:41,492 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:11:41,716 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:11:42,426 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 16:11:43,133 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 16:11:43,867 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:11:44,590 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:11:45,312 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-07-21 16:11:46,034 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-07-21 16:11:46,736 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 16:11:47,402 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-07-21 16:11:48,070 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-07-21 16:11:48,688 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-21 16:11:49,402 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-07-21 16:11:50,012 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 16:11:50,615 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-07-21 16:11:51,199 WARN L193 SmtUtils]: Spent 580.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-07-21 16:11:51,771 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:11:52,309 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-07-21 16:11:52,823 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-07-21 16:11:53,376 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 16:11:53,869 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-07-21 16:11:54,386 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-21 16:11:54,880 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-07-21 16:11:55,360 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-07-21 16:11:55,802 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:11:56,247 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-07-21 16:11:56,676 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-07-21 16:11:57,090 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 16:11:57,496 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 16:11:57,899 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 16:11:58,274 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-21 16:11:58,637 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 16:11:58,985 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 16:11:59,326 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 16:11:59,667 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 16:11:59,995 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 16:12:00,311 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 16:12:00,601 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 16:12:00,879 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:12:01,145 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 16:12:01,405 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 16:12:01,645 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 16:12:01,885 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 16:12:02,105 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:12:02,317 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 16:12:02,522 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:12:02,720 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:12:02,893 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 16:12:03,050 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 16:12:03,205 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:03,341 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 16:12:04,516 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:04,636 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:04,763 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:04,889 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:05,635 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:12:05,840 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:12:06,057 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:12:06,284 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:12:06,511 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:12:06,723 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 16:12:06,927 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 16:12:07,125 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:12:07,294 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 16:12:07,462 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 16:12:07,604 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:12:07,744 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 16:12:07,874 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:10,103 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:10,229 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:10,351 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:10,486 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:13,181 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:13,353 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:13,528 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:13,708 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:14,508 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:14,770 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:15,041 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:15,308 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:16,609 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:12:16,936 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:12:17,275 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:12:17,602 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:12:18,502 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:18,618 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:18,738 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:18,865 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:12:20,901 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:21,059 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:21,229 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:21,413 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:22,209 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:22,491 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:22,781 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:23,067 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:25,302 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:25,471 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:25,655 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:25,839 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:28,804 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:28,923 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:29,051 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:29,186 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:29,936 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:12:30,056 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:12:30,192 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:12:30,320 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:12:30,582 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:30,842 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:31,115 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:31,396 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:32,148 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:12:32,265 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:12:32,403 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:12:32,536 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:12:33,278 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:12:33,498 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:12:33,740 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:12:33,964 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:12:34,529 WARN L193 SmtUtils]: Spent 558.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:12:35,067 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:12:35,643 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:12:36,237 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:12:37,038 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:37,163 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:37,306 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:37,447 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:38,266 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:12:38,479 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:12:38,704 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:12:38,937 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:12:39,668 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:12:40,341 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:12:41,133 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:12:42,032 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:12:43,272 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:43,442 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:43,622 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:43,805 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:44,649 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:44,935 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:45,228 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:45,505 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:46,298 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:46,430 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:46,564 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:46,704 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:12:47,158 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:12:47,608 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:12:48,060 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:12:48,502 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:12:50,060 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 16:12:51,684 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 16:12:53,303 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification that was a NOOP. DAG size: 223 [2020-07-21 16:12:54,907 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 223 [2020-07-21 16:12:56,563 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:56,735 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:12:56,921 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:57,112 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:12:57,977 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:58,255 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:12:58,548 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:58,838 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:12:59,630 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:59,753 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:12:59,900 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:00,040 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:00,621 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:13:01,068 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:13:01,549 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:13:02,018 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:13:02,498 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-07-21 16:13:02,950 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-07-21 16:13:03,383 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 16:13:03,811 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-21 16:13:04,218 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 16:13:04,618 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:13:04,986 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 16:13:05,325 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 16:13:05,653 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-21 16:13:05,906 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 16:13:06,151 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 16:13:06,382 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 16:13:06,609 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:13:06,818 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 16:13:07,022 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 16:13:07,215 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 16:13:07,399 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:13:07,623 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:13:07,840 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:13:08,041 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:13:08,233 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 16:13:08,397 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:13:08,572 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:13:08,715 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 16:13:08,849 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:13:09,972 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:10,103 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:10,245 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:10,389 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:10,538 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:13:13,048 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:13:13,228 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:13:13,420 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:13:13,608 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:13:14,450 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:13:14,746 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:13:15,051 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:13:15,328 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:13:16,800 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:13:16,912 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:13:17,038 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:13:17,164 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:13:19,888 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:20,015 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:20,146 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:20,288 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:21,117 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:21,240 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:21,378 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:21,517 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:21,805 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:13:22,084 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:13:22,373 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:13:22,673 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:13:23,470 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:23,600 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:23,740 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:23,890 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:24,671 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:13:24,896 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:13:25,153 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:13:25,389 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:13:25,930 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:13:26,501 WARN L193 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:13:27,102 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:13:27,668 WARN L193 SmtUtils]: Spent 561.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:13:28,442 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:28,556 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:28,677 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:28,813 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:29,591 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:13:29,819 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:13:30,074 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:13:30,328 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:13:31,360 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:13:32,270 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-07-21 16:13:33,173 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:13:34,096 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 16:13:35,382 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:35,514 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:35,663 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:35,813 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:36,625 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:13:36,886 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:13:37,131 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:13:37,389 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:13:37,622 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:13:37,847 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 16:13:38,055 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 16:13:38,248 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:13:38,431 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 16:13:38,598 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:13:38,756 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:13:38,902 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:13:39,032 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:13:42,979 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:43,109 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 16:13:43,258 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:43,396 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:13:44,176 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:44,302 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:44,433 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:44,576 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:44,852 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:13:45,131 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:13:45,420 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:13:45,704 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:13:46,487 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:46,613 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:46,741 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:46,883 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:47,660 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:13:47,879 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:13:48,122 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:13:48,349 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:13:48,920 WARN L193 SmtUtils]: Spent 565.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:13:49,491 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 16:13:50,073 WARN L193 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:13:50,673 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 16:13:51,938 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:52,068 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:13:52,217 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:52,365 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:53,168 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:13:53,400 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 16:13:53,649 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:13:53,906 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:13:54,161 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 16:13:54,394 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 16:13:54,610 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:13:54,823 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:13:55,017 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:13:55,203 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 16:13:55,385 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 16:13:55,543 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 16:13:55,699 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 16:13:57,735 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:57,839 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:13:59,737 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:14:00,531 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:14:00,832 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:14:01,137 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:14:01,359 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:14:01,583 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:14:02,582 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 16:14:02,690 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:14:02,913 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:14:04,665 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:14:04,774 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:14:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7846 backedges. 1138 proven. 1715 refuted. 0 times theorem prover too weak. 4993 trivial. 0 not checked. [2020-07-21 16:14:06,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142069698] [2020-07-21 16:14:06,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:14:06,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 50] total 70 [2020-07-21 16:14:06,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215182880] [2020-07-21 16:14:06,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-21 16:14:06,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:14:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-21 16:14:06,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=4310, Unknown=0, NotChecked=0, Total=4830 [2020-07-21 16:14:06,279 INFO L87 Difference]: Start difference. First operand 1456 states and 9806 transitions. Second operand 70 states. [2020-07-21 16:14:18,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:14:18,808 INFO L93 Difference]: Finished difference Result 3130 states and 44565 transitions. [2020-07-21 16:14:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-07-21 16:14:18,815 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 523 [2020-07-21 16:14:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:14:19,313 INFO L225 Difference]: With dead ends: 3130 [2020-07-21 16:14:19,313 INFO L226 Difference]: Without dead ends: 3124 [2020-07-21 16:14:19,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1098 GetRequests, 875 SyntacticMatches, 102 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9446 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1833, Invalid=13173, Unknown=0, NotChecked=0, Total=15006 [2020-07-21 16:14:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2020-07-21 16:14:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 2443. [2020-07-21 16:14:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2020-07-21 16:14:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 39435 transitions. [2020-07-21 16:14:21,046 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 39435 transitions. Word has length 523 [2020-07-21 16:14:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:14:21,047 INFO L479 AbstractCegarLoop]: Abstraction has 2443 states and 39435 transitions. [2020-07-21 16:14:21,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-21 16:14:21,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 39435 transitions. [2020-07-21 16:14:21,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-21 16:14:21,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:14:21,125 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 36, 36, 27, 27, 20, 20, 20, 20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 18, 14, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:14:21,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:14:21,335 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:14:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:14:21,337 INFO L82 PathProgramCache]: Analyzing trace with hash -952482485, now seen corresponding path program 46 times [2020-07-21 16:14:21,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:14:21,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424053171] [2020-07-21 16:14:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:14:23,494 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:14:23,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:14:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 156 conjunts are in the unsatisfiable core [2020-07-21 16:14:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:14:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7874 backedges. 1034 proven. 1754 refuted. 0 times theorem prover too weak. 5086 trivial. 0 not checked. [2020-07-21 16:14:27,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:14:28,510 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:14:29,504 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:14:29,715 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:14:29,934 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 16:14:30,158 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:14:30,370 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:14:31,314 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:14:31,446 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:14:31,590 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:14:31,730 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:14:32,127 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 16:14:32,520 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 16:14:32,908 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 16:14:33,312 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 16:14:34,234 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:14:34,364 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 16:14:34,497 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:14:34,637 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 16:14:35,490 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 16:14:35,742 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 16:14:35,998 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 16:14:36,260 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:14:36,535 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:14:37,281 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-07-21 16:14:38,080 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-07-21 16:14:38,874 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 16:14:39,665 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-07-21 16:14:40,465 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:14:40,569 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:14:41,161 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:14:41,333 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:14:41,515 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:14:41,706 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 16:14:42,522 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:14:42,636 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 16:14:42,956 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:14:43,278 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 16:14:43,611 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:14:43,940 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:14:45,278 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 16:14:46,784 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 221 [2020-07-21 16:14:48,126 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 223 [2020-07-21 16:14:49,472 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 223