/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:55:33,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:55:33,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:55:33,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:55:33,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:55:33,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:55:33,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:55:33,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:55:33,068 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:55:33,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:55:33,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:55:33,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:55:33,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:55:33,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:55:33,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:55:33,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:55:33,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:55:33,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:55:33,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:55:33,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:55:33,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:55:33,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:55:33,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:55:33,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:55:33,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:55:33,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:55:33,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:55:33,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:55:33,114 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 10:55:33,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:55:33,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:55:33,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:55:33,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:55:33,130 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:55:33,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:55:33,130 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:55:33,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:55:33,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:55:33,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:55:33,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:55:33,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:55:33,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:55:33,131 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:55:33,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:55:33,132 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:55:33,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:55:33,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:55:33,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:55:33,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:55:33,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:55:33,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:55:33,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:55:33,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:55:33,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:55:33,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:55:33,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:33,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:55:33,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:55:33,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:55:33,413 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:55:33,426 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:55:33,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:55:33,431 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:55:33,432 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:55:33,432 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c [2020-07-21 10:55:33,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39bf3ac74/571d399e29e84fa09888ced84d775f1b/FLAGd96b77c60 [2020-07-21 10:55:33,868 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:55:33,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c [2020-07-21 10:55:33,878 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39bf3ac74/571d399e29e84fa09888ced84d775f1b/FLAGd96b77c60 [2020-07-21 10:55:34,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39bf3ac74/571d399e29e84fa09888ced84d775f1b [2020-07-21 10:55:34,282 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:55:34,284 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:55:34,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:55:34,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:55:34,289 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:55:34,290 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:55:34" (1/1) ... [2020-07-21 10:55:34,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31286fa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34, skipping insertion in model container [2020-07-21 10:55:34,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:55:34" (1/1) ... [2020-07-21 10:55:34,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:55:34,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:55:34,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:55:34,485 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:55:34,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:55:34,510 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:55:34,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34 WrapperNode [2020-07-21 10:55:34,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:55:34,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:55:34,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:55:34,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:55:34,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34" (1/1) ... [2020-07-21 10:55:34,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34" (1/1) ... [2020-07-21 10:55:34,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34" (1/1) ... [2020-07-21 10:55:34,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34" (1/1) ... [2020-07-21 10:55:34,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34" (1/1) ... [2020-07-21 10:55:34,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34" (1/1) ... [2020-07-21 10:55:34,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34" (1/1) ... [2020-07-21 10:55:34,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:55:34,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:55:34,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:55:34,536 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:55:34,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34" (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 10:55:34,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:55:34,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:55:34,692 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 10:55:34,693 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 10:55:34,693 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:55:34,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:55:34,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:55:34,693 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 10:55:34,694 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 10:55:34,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:55:34,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:55:34,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:55:35,001 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:55:35,001 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:55:35,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:55:35 BoogieIcfgContainer [2020-07-21 10:55:35,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:55:35,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:55:35,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:55:35,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:55:35,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:55:34" (1/3) ... [2020-07-21 10:55:35,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249a13bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:55:35, skipping insertion in model container [2020-07-21 10:55:35,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:55:34" (2/3) ... [2020-07-21 10:55:35,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@249a13bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:55:35, skipping insertion in model container [2020-07-21 10:55:35,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:55:35" (3/3) ... [2020-07-21 10:55:35,019 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-2.c [2020-07-21 10:55:35,034 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:55:35,044 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:55:35,064 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:55:35,122 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:55:35,122 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:55:35,125 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:55:35,125 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:55:35,126 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:55:35,126 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:55:35,126 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:55:35,126 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:55:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 10:55:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:55:35,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:35,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:35,176 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:35,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:35,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 10:55:35,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:35,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032066767] [2020-07-21 10:55:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:35,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:55:35,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:35,419 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 10:55:35,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:55:35,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032066767] [2020-07-21 10:55:35,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:55:35,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:55:35,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692000785] [2020-07-21 10:55:35,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:55:35,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:55:35,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:55:35,451 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 10:55:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:35,560 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 10:55:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:55:35,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:55:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:35,574 INFO L225 Difference]: With dead ends: 44 [2020-07-21 10:55:35,574 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 10:55:35,578 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 10:55:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 10:55:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 10:55:35,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:55:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:55:35,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 10:55:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:35,630 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:55:35,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:55:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:55:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:55:35,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:35,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:35,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:35,849 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:35,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:35,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 10:55:35,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:35,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049161849] [2020-07-21 10:55:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:35,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:55:35,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:35,929 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 10:55:35,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:55:35,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049161849] [2020-07-21 10:55:35,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:55:35,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:55:35,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145342922] [2020-07-21 10:55:35,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:55:35,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:35,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:55:35,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:55:35,934 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 10:55:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:36,000 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 10:55:36,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:55:36,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:55:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:36,003 INFO L225 Difference]: With dead ends: 36 [2020-07-21 10:55:36,003 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 10:55:36,004 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 10:55:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 10:55:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 10:55:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 10:55:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 10:55:36,015 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 10:55:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:36,015 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 10:55:36,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:55:36,016 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 10:55:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:55:36,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:36,018 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 10:55:36,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:36,227 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:36,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 10:55:36,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:36,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931268489] [2020-07-21 10:55:36,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:36,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:55:36,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:36,320 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 10:55:36,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:36,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:36,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:36,552 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 10:55:36,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931268489] [2020-07-21 10:55:36,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:36,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:55:36,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767477655] [2020-07-21 10:55:36,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:55:36,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:36,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:55:36,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:55:36,555 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 10:55:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:36,670 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 10:55:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:55:36,670 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 10:55:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:36,673 INFO L225 Difference]: With dead ends: 41 [2020-07-21 10:55:36,673 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 10:55:36,674 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 10:55:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 10:55:36,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 10:55:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:55:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:55:36,684 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 10:55:36,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:36,684 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:55:36,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:55:36,685 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:55:36,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:55:36,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:36,687 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 10:55:36,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:36,901 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 10:55:36,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:36,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540849506] [2020-07-21 10:55:36,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:55:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:36,982 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 10:55:36,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:37,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:37,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:37,139 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 10:55:37,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540849506] [2020-07-21 10:55:37,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:37,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 10:55:37,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360824975] [2020-07-21 10:55:37,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:55:37,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:37,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:55:37,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:55:37,142 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 10:55:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:37,254 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 10:55:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:55:37,255 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 10:55:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:37,257 INFO L225 Difference]: With dead ends: 46 [2020-07-21 10:55:37,257 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 10:55:37,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:55:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 10:55:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 10:55:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 10:55:37,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 10:55:37,268 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 10:55:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:37,268 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 10:55:37,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:55:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 10:55:37,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:55:37,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:37,271 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 10:55:37,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:37,486 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 10:55:37,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:37,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305367517] [2020-07-21 10:55:37,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:55:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:37,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:55:37,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:37,594 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 10:55:37,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:37,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:37,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:37,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:37,974 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 10:55:37,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305367517] [2020-07-21 10:55:37,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:37,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:55:37,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824709271] [2020-07-21 10:55:37,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:55:37,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:55:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:55:37,977 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 10:55:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:38,153 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 10:55:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:55:38,153 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 10:55:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:38,155 INFO L225 Difference]: With dead ends: 51 [2020-07-21 10:55:38,155 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 10:55:38,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 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 10:55:38,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 10:55:38,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 10:55:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:55:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:55:38,167 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 10:55:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:38,167 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:55:38,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:55:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:55:38,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 10:55:38,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:38,170 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 10:55:38,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:38,383 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 10:55:38,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:38,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543349660] [2020-07-21 10:55:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:55:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 10:55:38,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:38,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:38,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:38,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:55:38,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543349660] [2020-07-21 10:55:38,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:38,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 10:55:38,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348543088] [2020-07-21 10:55:38,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 10:55:38,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:38,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 10:55:38,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:55:38,790 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 10:55:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:38,957 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 10:55:38,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:55:38,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 10:55:38,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:38,962 INFO L225 Difference]: With dead ends: 56 [2020-07-21 10:55:38,962 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:55:38,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 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 10:55:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:55:38,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 10:55:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 10:55:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 10:55:38,973 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 10:55:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:38,974 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 10:55:38,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 10:55:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 10:55:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:55:38,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:38,976 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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 10:55:39,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:39,183 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 10:55:39,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:39,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289565302] [2020-07-21 10:55:39,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:55:39,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 10:55:39,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:39,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:39,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:39,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:39,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:55:39,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289565302] [2020-07-21 10:55:39,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:39,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:55:39,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623495947] [2020-07-21 10:55:39,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:55:39,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:55:39,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:55:39,883 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 10:55:40,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:40,083 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 10:55:40,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:55:40,083 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 10:55:40,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:40,090 INFO L225 Difference]: With dead ends: 61 [2020-07-21 10:55:40,090 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 10:55:40,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 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 10:55:40,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 10:55:40,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 10:55:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:55:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:55:40,112 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 10:55:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:40,113 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:55:40,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:55:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:55:40,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 10:55:40,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:40,122 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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 10:55:40,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:40,325 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 10:55:40,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:40,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930539237] [2020-07-21 10:55:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:40,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:55:40,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 10:55:40,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:40,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:40,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:40,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:40,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:40,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 10:55:40,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930539237] [2020-07-21 10:55:40,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:40,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 10:55:40,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825692028] [2020-07-21 10:55:40,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:55:40,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:55:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:55:40,955 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 10:55:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:41,171 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 10:55:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:55:41,172 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 10:55:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:41,175 INFO L225 Difference]: With dead ends: 66 [2020-07-21 10:55:41,175 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 10:55:41,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 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 10:55:41,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 10:55:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 10:55:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 10:55:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 10:55:41,189 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 10:55:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:41,189 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 10:55:41,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:55:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 10:55:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 10:55:41,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:41,192 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 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 10:55:41,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:41,407 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 10:55:41,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:41,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476216247] [2020-07-21 10:55:41,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:55:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 10:55:41,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:42,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:42,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:42,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:42,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:42,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:42,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:42,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 10:55:42,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476216247] [2020-07-21 10:55:42,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:42,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 10:55:42,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742788260] [2020-07-21 10:55:42,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:55:42,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:42,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:55:42,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:55:42,437 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 10:55:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:42,679 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 10:55:42,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:55:42,680 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 10:55:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:42,683 INFO L225 Difference]: With dead ends: 71 [2020-07-21 10:55:42,683 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 10:55:42,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 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 10:55:42,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 10:55:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 10:55:42,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:55:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:55:42,695 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 10:55:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:42,696 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:55:42,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:55:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:55:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 10:55:42,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:42,698 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:42,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:42,908 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 10:55:42,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:42,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470212317] [2020-07-21 10:55:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:42,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:55:43,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 10:55:43,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:43,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:43,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:43,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:43,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 10:55:43,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470212317] [2020-07-21 10:55:43,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:43,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 10:55:43,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640194932] [2020-07-21 10:55:43,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 10:55:43,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:43,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 10:55:43,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 10:55:43,976 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 10:55:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:44,216 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 10:55:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:55:44,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 10:55:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:44,219 INFO L225 Difference]: With dead ends: 76 [2020-07-21 10:55:44,219 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 10:55:44,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 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 10:55:44,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 10:55:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 10:55:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 10:55:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 10:55:44,245 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 10:55:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:44,246 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 10:55:44,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 10:55:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 10:55:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 10:55:44,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:44,253 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:44,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:44,456 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 10:55:44,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:44,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660945267] [2020-07-21 10:55:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:55:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:55:44,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 10:55:44,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:45,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 10:55:46,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660945267] [2020-07-21 10:55:46,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:46,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 10:55:46,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719228250] [2020-07-21 10:55:46,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:55:46,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:46,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:55:46,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:55:46,403 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 10:55:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:46,677 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 10:55:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:55:46,678 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 10:55:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:46,681 INFO L225 Difference]: With dead ends: 81 [2020-07-21 10:55:46,681 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 10:55:46,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:55:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 10:55:46,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 10:55:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:55:46,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 10:55:46,693 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 10:55:46,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:46,694 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 10:55:46,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:55:46,694 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 10:55:46,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 10:55:46,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:46,696 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:46,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:46,911 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 10:55:46,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:46,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665057210] [2020-07-21 10:55:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:46,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:55:46,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 10:55:47,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:47,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:48,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:48,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:48,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:48,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:48,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:48,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 10:55:48,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665057210] [2020-07-21 10:55:48,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:48,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 10:55:48,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900241622] [2020-07-21 10:55:48,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:55:48,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:48,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:55:48,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:55:48,456 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 10:55:48,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:48,712 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 10:55:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:55:48,717 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 10:55:48,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:48,719 INFO L225 Difference]: With dead ends: 86 [2020-07-21 10:55:48,719 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 10:55:48,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:55:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 10:55:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 10:55:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 10:55:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 10:55:48,730 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 10:55:48,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:48,730 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 10:55:48,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:55:48,731 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 10:55:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 10:55:48,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:48,734 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:48,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:48,949 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:48,950 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 10:55:48,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:48,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059325700] [2020-07-21 10:55:48,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:49,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:55:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 10:55:49,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:50,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:50,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:50,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 10:55:51,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059325700] [2020-07-21 10:55:51,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:51,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 10:55:51,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540256336] [2020-07-21 10:55:51,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:55:51,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:51,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:55:51,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:55:51,446 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 10:55:51,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:51,835 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 10:55:51,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:55:51,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 10:55:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:51,843 INFO L225 Difference]: With dead ends: 91 [2020-07-21 10:55:51,843 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 10:55:51,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:55:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 10:55:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 10:55:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 10:55:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 10:55:51,855 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 10:55:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:51,856 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 10:55:51,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:55:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 10:55:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 10:55:51,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:51,859 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:52,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:52,072 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 10:55:52,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:52,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164543396] [2020-07-21 10:55:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:55:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 10:55:52,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:53,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:54,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:54,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:54,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:54,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:54,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:54,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:54,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 10:55:54,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164543396] [2020-07-21 10:55:54,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:54,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 10:55:54,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075916962] [2020-07-21 10:55:54,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:55:54,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:54,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:55:54,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:55:54,699 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 10:55:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:55,126 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 10:55:55,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:55:55,127 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 10:55:55,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:55,129 INFO L225 Difference]: With dead ends: 96 [2020-07-21 10:55:55,129 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 10:55:55,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:55:55,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 10:55:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 10:55:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 10:55:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 10:55:55,141 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 10:55:55,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:55,142 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 10:55:55,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:55:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 10:55:55,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 10:55:55,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:55,151 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:55,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:55,364 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:55,365 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 10:55:55,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:55,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096771437] [2020-07-21 10:55:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:55,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:55:55,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:55,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 10:55:55,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:57,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:57,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:58,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:58,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:58,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:58,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:59,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:59,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:59,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:59,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:59,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 10:55:59,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096771437] [2020-07-21 10:55:59,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:59,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 10:55:59,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191577383] [2020-07-21 10:55:59,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:55:59,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:55:59,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:55:59,547 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 10:56:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:00,034 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 10:56:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:56:00,034 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 10:56:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:00,038 INFO L225 Difference]: With dead ends: 101 [2020-07-21 10:56:00,038 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 10:56:00,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:56:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 10:56:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 10:56:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 10:56:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 10:56:00,055 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 10:56:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:00,056 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 10:56:00,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:56:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 10:56:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 10:56:00,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:00,061 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:00,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:00,276 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:00,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 10:56:00,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:00,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459061186] [2020-07-21 10:56:00,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:00,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:56:00,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 10:56:00,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:02,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:02,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:03,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:04,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:04,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:04,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:04,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:04,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:04,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 10:56:04,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459061186] [2020-07-21 10:56:04,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:04,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 10:56:04,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257465860] [2020-07-21 10:56:04,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:56:04,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:04,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:56:04,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:56:04,697 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 10:56:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:05,160 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 10:56:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:56:05,160 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 10:56:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:05,163 INFO L225 Difference]: With dead ends: 106 [2020-07-21 10:56:05,163 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 10:56:05,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:56:05,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 10:56:05,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 10:56:05,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 10:56:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 10:56:05,185 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 10:56:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:05,187 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 10:56:05,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:56:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 10:56:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 10:56:05,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:05,195 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:05,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:05,409 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:05,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:05,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 10:56:05,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:05,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131211342] [2020-07-21 10:56:05,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:05,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1828 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:56:05,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 10:56:06,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:09,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:10,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:11,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:11,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:12,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:12,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:12,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:12,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:12,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:12,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:12,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:12,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 10:56:13,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131211342] [2020-07-21 10:56:13,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:13,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 10:56:13,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897497537] [2020-07-21 10:56:13,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:56:13,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:13,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:56:13,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:56:13,214 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 10:56:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:13,791 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 10:56:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:56:13,792 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 10:56:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:13,797 INFO L225 Difference]: With dead ends: 111 [2020-07-21 10:56:13,797 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 10:56:13,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:56:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 10:56:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 10:56:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 10:56:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 10:56:13,809 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 10:56:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:13,810 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 10:56:13,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:56:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 10:56:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 10:56:13,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:13,813 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:14,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:14,028 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 10:56:14,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:14,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003412852] [2020-07-21 10:56:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:56:14,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 10:56:14,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:17,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:18,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:18,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:18,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 10:56:19,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003412852] [2020-07-21 10:56:19,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:19,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 10:56:19,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035163866] [2020-07-21 10:56:19,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:56:19,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:19,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:56:19,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:56:19,854 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-21 10:56:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:20,420 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 10:56:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:56:20,421 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-21 10:56:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:20,426 INFO L225 Difference]: With dead ends: 116 [2020-07-21 10:56:20,426 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 10:56:20,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:56:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 10:56:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 10:56:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 10:56:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 10:56:20,439 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 10:56:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:20,440 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 10:56:20,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:56:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 10:56:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-21 10:56:20,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:20,447 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 46, 45, 45, 34, 34, 34, 34, 34, 34, 34, 34, 22, 22, 22, 22, 22, 22, 22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:20,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:20,661 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:20,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-21 10:56:20,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:20,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838476863] [2020-07-21 10:56:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:56:21,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-21 10:56:21,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:25,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:25,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:26,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:26,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:28,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:29,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:29,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:29,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:29,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:29,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:29,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:30,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:30,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:30,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:30,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-21 10:56:30,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838476863] [2020-07-21 10:56:30,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:30,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 10:56:30,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871851944] [2020-07-21 10:56:30,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 10:56:30,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 10:56:30,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:56:30,365 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-21 10:56:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:30,948 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 10:56:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:56:30,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-21 10:56:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:30,952 INFO L225 Difference]: With dead ends: 121 [2020-07-21 10:56:30,952 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 10:56:30,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1439 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 10:56:30,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 10:56:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 10:56:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 10:56:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 10:56:30,966 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-21 10:56:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:30,966 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 10:56:30,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 10:56:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 10:56:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 10:56:30,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:30,975 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 55, 55, 53, 37, 37, 37, 37, 37, 37, 37, 37, 27, 27, 27, 27, 27, 27, 27, 26, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:31,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:31,191 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:31,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-21 10:56:31,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:31,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690916119] [2020-07-21 10:56:31,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:31,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:56:31,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-21 10:56:32,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:36,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:36,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:38,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:39,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:39,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:40,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:40,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:40,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:41,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:41,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:41,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:41,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-21 10:56:41,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690916119] [2020-07-21 10:56:41,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:41,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 10:56:41,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274680825] [2020-07-21 10:56:41,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 10:56:41,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:41,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 10:56:41,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:56:41,611 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-21 10:56:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:42,267 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-21 10:56:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:56:42,268 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-21 10:56:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:42,272 INFO L225 Difference]: With dead ends: 126 [2020-07-21 10:56:42,273 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 10:56:42,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1698 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 10:56:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 10:56:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-21 10:56:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 10:56:42,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 10:56:42,287 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-21 10:56:42,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:42,288 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 10:56:42,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 10:56:42,288 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 10:56:42,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-21 10:56:42,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:42,313 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 110, 110, 94, 74, 74, 74, 74, 74, 74, 74, 74, 55, 55, 55, 55, 55, 55, 55, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:42,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:42,529 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:42,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-21 10:56:42,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:42,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902186033] [2020-07-21 10:56:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:43,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 3771 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 10:56:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-21 10:56:44,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:53,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:53,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:56,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:57,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:59,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:00,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:00,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:00,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:00,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:00,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:01,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:01,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:01,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:01,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-21 10:57:02,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902186033] [2020-07-21 10:57:02,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:02,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 10:57:02,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141130498] [2020-07-21 10:57:02,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 10:57:02,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:02,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 10:57:02,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 10:57:02,407 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-21 10:57:03,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:03,355 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-21 10:57:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 10:57:03,356 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-21 10:57:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:03,362 INFO L225 Difference]: With dead ends: 131 [2020-07-21 10:57:03,362 INFO L226 Difference]: Without dead ends: 127 [2020-07-21 10:57:03,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3392 GetRequests, 3333 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 10:57:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-21 10:57:03,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-21 10:57:03,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 10:57:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 10:57:03,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-21 10:57:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:03,382 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 10:57:03,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 10:57:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 10:57:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-21 10:57:03,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:03,407 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 92, 92, 87, 60, 60, 60, 60, 60, 60, 60, 60, 46, 46, 46, 46, 46, 46, 46, 41, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:03,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:03,623 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:03,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:03,624 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-21 10:57:03,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:03,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759184936] [2020-07-21 10:57:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:04,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 10:57:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-21 10:57:05,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:12,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:12,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:15,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:15,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:17,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:17,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:18,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:20,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:20,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:21,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:21,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:21,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:21,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:21,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-21 10:57:22,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759184936] [2020-07-21 10:57:22,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:22,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 10:57:22,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31972706] [2020-07-21 10:57:22,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 10:57:22,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:22,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 10:57:22,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 10:57:22,263 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-21 10:57:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:23,116 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-21 10:57:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 10:57:23,120 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-21 10:57:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:23,123 INFO L225 Difference]: With dead ends: 136 [2020-07-21 10:57:23,123 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 10:57:23,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 10:57:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 10:57:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-21 10:57:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 10:57:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 10:57:23,140 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-21 10:57:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:23,142 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 10:57:23,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 10:57:23,142 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 10:57:23,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-21 10:57:23,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:23,178 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 112, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 64, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:23,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:23,392 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:23,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-21 10:57:23,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:23,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364536249] [2020-07-21 10:57:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:57:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:24,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 4438 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 10:57:24,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-21 10:57:26,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:37,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:37,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:39,870 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 10:57:41,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:43,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:43,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:47,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:48,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:49,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:49,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:50,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:51,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:51,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:51,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-21 10:57:52,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364536249] [2020-07-21 10:57:52,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:52,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 10:57:52,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443940203] [2020-07-21 10:57:52,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 10:57:52,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:52,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 10:57:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:57:52,837 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-21 10:57:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:54,322 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-21 10:57:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 10:57:54,324 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-21 10:57:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:54,331 INFO L225 Difference]: With dead ends: 141 [2020-07-21 10:57:54,331 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 10:57:54,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 10:57:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 10:57:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-21 10:57:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 10:57:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 10:57:54,352 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-21 10:57:54,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:54,355 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 10:57:54,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 10:57:54,355 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 10:57:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-21 10:57:54,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:54,409 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 124, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 60, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:54,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:54,624 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:54,625 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-21 10:57:54,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:54,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664617025] [2020-07-21 10:57:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:57:55,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:55,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 4558 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 10:57:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-21 10:57:57,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:09,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:09,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:13,230 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 10:58:15,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:20,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:20,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:25,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:25,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:26,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:27,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:27,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:27,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:28,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-21 10:58:30,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664617025] [2020-07-21 10:58:30,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:30,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 10:58:30,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048991602] [2020-07-21 10:58:30,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 10:58:30,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:30,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 10:58:30,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:58:30,622 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-21 10:58:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:32,120 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-21 10:58:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 10:58:32,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-21 10:58:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:32,128 INFO L225 Difference]: With dead ends: 146 [2020-07-21 10:58:32,128 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 10:58:32,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 10:58:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 10:58:32,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-21 10:58:32,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 10:58:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 10:58:32,147 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-21 10:58:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:32,149 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 10:58:32,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 10:58:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 10:58:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-21 10:58:32,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:32,263 INFO L422 BasicCegarLoop]: trace histogram [329, 329, 236, 236, 211, 164, 164, 164, 164, 164, 164, 164, 164, 118, 118, 118, 118, 118, 118, 118, 118, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:32,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:32,465 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:32,467 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-21 10:58:32,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:32,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922063523] [2020-07-21 10:58:32,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:58:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:34,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 8208 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 10:58:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:58:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-21 10:58:39,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:44,010 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 10:58:45,410 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 10:58:45,517 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 10:58:45,628 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 10:58:45,736 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 10:58:45,849 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 10:59:02,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:04,911 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 10:59:12,011 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 10:59:12,121 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 10:59:12,235 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 10:59:12,337 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 10:59:13,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:21,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:21,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:31,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:36,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:36,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:38,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:41,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:42,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:42,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:43,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:43,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:43,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-21 10:59:48,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922063523] [2020-07-21 10:59:48,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:59:48,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 10:59:48,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196936082] [2020-07-21 10:59:48,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 10:59:48,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:59:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 10:59:48,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:59:48,084 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-21 10:59:50,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:59:50,331 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-21 10:59:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 10:59:50,335 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-21 10:59:50,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:59:50,343 INFO L225 Difference]: With dead ends: 151 [2020-07-21 10:59:50,343 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 10:59:50,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 10:59:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 10:59:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-21 10:59:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 10:59:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 10:59:50,365 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-21 10:59:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:59:50,368 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 10:59:50,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 10:59:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 10:59:50,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-21 10:59:50,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:59:50,468 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 214, 214, 208, 143, 143, 143, 143, 143, 143, 143, 143, 107, 107, 107, 107, 107, 107, 107, 101, 79, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:59:50,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:59:50,669 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:59:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:59:50,671 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-21 10:59:50,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:59:50,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836449163] [2020-07-21 10:59:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 10:59:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:59:52,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 7482 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 10:59:52,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-21 10:59:56,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:00:00,469 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:00:00,572 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:00:00,685 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:00:00,795 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:00:02,521 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:00:02,636 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:00:02,757 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:00:02,905 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:00:04,255 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:00:04,394 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:00:04,540 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:00:04,681 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:00:06,435 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:00:06,619 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:00:06,772 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:00:06,927 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:00:07,084 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 11:00:07,230 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 11:00:07,366 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 11:00:07,487 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 11:00:07,623 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 11:00:07,786 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 11:00:07,904 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:00:08,026 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 11:00:08,137 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 11:00:22,347 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:00:22,453 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:00:22,563 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:00:22,668 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:00:23,237 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:00:23,355 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:00:23,483 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:00:23,601 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:00:25,500 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:00:25,634 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:00:25,767 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:00:25,887 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:00:27,260 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:00:27,402 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:00:27,551 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:00:27,701 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:00:27,847 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 11:00:27,987 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 11:00:28,117 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 11:00:28,234 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 11:00:28,344 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:00:28,451 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:00:29,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:29,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:41,185 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:00:41,289 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:00:41,402 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:00:41,517 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:00:42,132 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:00:42,247 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:00:42,379 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:00:42,510 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:00:44,619 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:00:44,755 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:00:44,900 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:00:45,052 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:00:45,197 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 11:00:45,329 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 11:00:45,452 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:00:45,569 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:00:45,680 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:00:46,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:03,105 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:01:03,220 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:01:03,937 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:01:04,046 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:01:04,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:04,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:09,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:09,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:15,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:17,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:18,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:20,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:20,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:21,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:21,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:21,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-21 11:01:27,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836449163] [2020-07-21 11:01:27,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:01:27,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 11:01:27,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276407466] [2020-07-21 11:01:27,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 11:01:27,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:01:27,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 11:01:27,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 11:01:27,909 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-21 11:01:30,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:01:30,176 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-21 11:01:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 11:01:30,179 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-21 11:01:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:01:30,188 INFO L225 Difference]: With dead ends: 156 [2020-07-21 11:01:30,188 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 11:01:30,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 11:01:30,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 11:01:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-21 11:01:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 11:01:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 11:01:30,214 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-21 11:01:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:01:30,218 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 11:01:30,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 11:01:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 11:01:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-21 11:01:30,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:01:30,537 INFO L422 BasicCegarLoop]: trace histogram [436, 436, 300, 273, 273, 218, 218, 218, 218, 218, 218, 218, 218, 136, 136, 136, 136, 136, 136, 136, 136, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:01:30,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:01:30,752 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:01:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:01:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-21 11:01:30,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:01:30,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731224091] [2020-07-21 11:01:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:01:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:01:33,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 10296 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 11:01:33,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-21 11:01:41,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:43,741 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:01:44,536 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:01:44,640 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:01:44,754 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:01:44,867 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:01:45,703 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:01:45,835 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:01:45,966 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:01:46,093 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:01:48,330 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:01:48,466 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:01:48,606 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:01:48,747 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:01:50,284 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:01:50,428 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:01:50,591 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 11:01:50,748 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 11:01:53,084 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:01:53,263 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:01:53,433 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 11:01:53,600 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 11:01:53,768 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 11:01:53,929 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 11:01:54,081 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 11:01:54,229 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 11:01:54,368 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 11:01:54,507 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 11:01:54,640 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 11:01:54,758 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 11:01:54,870 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:01:54,977 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 11:02:17,900 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:02:18,007 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:02:18,118 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:02:18,235 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:02:18,784 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:02:18,908 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:02:19,041 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:02:19,171 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:02:19,993 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:02:20,130 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:02:20,274 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:02:20,423 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:02:21,783 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:02:21,933 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:02:22,088 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:02:22,248 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:02:25,999 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:02:26,163 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:02:26,336 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:02:26,517 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:02:29,113 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:02:29,297 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:02:29,492 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 11:02:29,688 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 11:02:29,938 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 11:02:30,119 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 11:02:30,290 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 11:02:30,444 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 11:02:30,587 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 11:02:30,727 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 11:02:30,863 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 11:02:30,993 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 11:02:31,123 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 11:02:31,242 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 11:02:31,353 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:02:31,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:50,204 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:02:50,313 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:02:50,952 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:02:51,067 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:02:51,190 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:02:51,312 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:02:51,889 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:02:52,018 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:02:52,154 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:02:52,290 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:02:53,158 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:02:53,302 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:02:53,456 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:02:53,610 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:02:55,066 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:02:55,224 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:02:55,391 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:02:55,558 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:02:59,552 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:02:59,727 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:02:59,919 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:03:00,105 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:03:00,284 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 11:03:00,452 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 11:03:00,613 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 11:03:00,768 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 11:03:00,917 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 11:03:01,056 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:03:01,187 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:03:01,310 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 11:03:01,428 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:03:01,536 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:03:01,643 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:03:02,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:33,506 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:03:33,633 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:03:33,770 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:03:33,888 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:03:34,748 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:03:34,890 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:03:35,042 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:03:35,192 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:03:36,665 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:03:36,831 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:03:37,004 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:03:37,176 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:03:37,346 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 11:03:37,501 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 11:03:37,645 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:03:37,784 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:03:37,913 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:03:38,040 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:03:38,156 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 11:03:38,263 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:03:38,368 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:03:38,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:43,863 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 11:03:48,895 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:03:49,107 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:03:49,216 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:03:49,910 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:03:50,032 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:03:50,163 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:03:50,289 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:03:50,885 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:03:51,025 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:03:51,174 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:03:51,313 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:03:52,253 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:03:52,404 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:03:52,568 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:03:52,729 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:03:52,885 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:03:53,029 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:03:53,165 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 11:03:53,295 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:03:53,419 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 11:03:53,535 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:03:53,643 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:03:54,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:00,395 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:04:00,501 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:04:01,183 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:04:01,303 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:04:01,426 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:04:01,546 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:04:02,130 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:04:02,259 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:04:02,393 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:04:02,529 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:04:02,672 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:04:02,815 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:04:02,959 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 11:04:03,082 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 11:04:03,190 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:04:03,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:07,797 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:04:07,905 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:04:08,020 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:04:08,135 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:04:08,831 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:04:08,949 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:04:09,074 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:04:09,198 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:04:09,319 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 11:04:09,433 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:04:09,535 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 11:04:10,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:10,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:15,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:18,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:19,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:20,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:21,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:21,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:21,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:22,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:04:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-21 11:04:33,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731224091] [2020-07-21 11:04:33,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:04:33,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-21 11:04:33,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646947176] [2020-07-21 11:04:33,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 11:04:33,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:04:33,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 11:04:33,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 11:04:33,311 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-21 11:04:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:04:36,997 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-21 11:04:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 11:04:37,003 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-21 11:04:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:04:37,011 INFO L225 Difference]: With dead ends: 161 [2020-07-21 11:04:37,011 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 11:04:37,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 11:04:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 11:04:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-21 11:04:37,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 11:04:37,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-21 11:04:37,037 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-21 11:04:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:04:37,040 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-21 11:04:37,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 11:04:37,041 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-21 11:04:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-21 11:04:37,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:04:37,736 INFO L422 BasicCegarLoop]: trace histogram [846, 846, 625, 533, 533, 423, 423, 423, 423, 423, 423, 423, 423, 359, 266, 266, 266, 266, 266, 266, 266, 221, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:04:37,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:04:37,938 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:04:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:04:37,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-21 11:04:37,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:04:37,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536478307] [2020-07-21 11:04:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:04:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:04:42,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 20729 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 11:04:42,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:05:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-21 11:05:25,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:28,051 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:05:28,155 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:05:28,274 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:05:28,388 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:05:28,827 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:05:28,942 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:05:29,075 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:05:29,185 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:05:29,715 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:05:29,822 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:05:29,938 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:05:30,054 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:05:31,057 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:05:31,182 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:05:31,318 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:05:31,454 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:05:33,535 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:05:33,683 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:05:33,840 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:05:34,014 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:05:40,417 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:05:40,612 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:05:40,811 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 11:05:41,016 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 11:05:52,503 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:05:52,724 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:05:52,963 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 11:05:53,199 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 11:05:53,435 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 11:05:53,650 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 11:05:53,866 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 11:05:54,070 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 11:05:54,266 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 11:05:54,451 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 11:05:54,627 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 11:05:54,795 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 11:05:54,954 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:05:55,104 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:05:55,252 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:05:55,387 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 11:05:55,514 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 11:05:55,632 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 11:05:55,744 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:07:17,543 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 11:08:15,164 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:08:15,267 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:08:15,994 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:08:16,100 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 11:08:16,205 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:08:16,319 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 11:08:16,835 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:08:16,959 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 11:08:17,096 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:08:17,219 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 11:08:17,919 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:08:18,031 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 11:08:18,178 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:08:18,297 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 11:08:19,805 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:08:19,962 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 11:08:20,137 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:08:20,310 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 11:08:23,479 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:08:23,659 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:08:23,838 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:08:24,022 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:08:30,854 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:08:31,027 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 11:08:31,217 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 11:08:31,405 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 11:08:31,588 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 11:08:31,764 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 11:08:31,912 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 11:08:32,064 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 11:08:32,227 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 11:08:32,371 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 11:08:32,485 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 11:08:32,604 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:08:32,746 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:08:32,859 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 11:08:33,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:08:33,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts