/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_25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:54:31,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:54:31,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:54:31,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:54:31,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:54:31,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:54:31,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:54:31,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:54:31,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:54:31,670 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:54:31,671 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:54:31,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:54:31,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:54:31,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:54:31,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:54:31,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:54:31,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:54:31,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:54:31,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:54:31,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:54:31,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:54:31,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:54:31,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:54:31,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:54:31,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 10:54:31,688 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 10:54:31,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 10:54:31,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 10:54:31,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 10:54:31,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 10:54:31,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 10:54:31,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 10:54:31,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 10:54:31,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 10:54:31,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 10:54:31,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 10:54:31,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 10:54:31,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 10:54:31,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:54:31,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:54:31,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:54:31,697 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 10:54:31,712 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:54:31,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:54:31,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:54:31,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:54:31,714 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:54:31,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:54:31,715 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:54:31,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:54:31,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:54:31,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:54:31,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:54:31,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:54:31,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:54:31,716 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:54:31,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:54:31,716 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:54:31,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:54:31,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:54:31,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:54:31,717 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:54:31,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:54:31,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:54:31,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:54:31,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:54:31,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:54:31,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:54:31,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:31,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:54:31,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:54:31,719 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 10:54:32,049 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:54:32,063 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:54:32,067 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:54:32,068 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:54:32,069 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:54:32,069 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-1.c [2020-07-21 10:54:32,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7cac459/a31345576dab4cf7aa4c0b711b34b6cd/FLAGa0220da00 [2020-07-21 10:54:32,662 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:54:32,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-1.c [2020-07-21 10:54:32,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7cac459/a31345576dab4cf7aa4c0b711b34b6cd/FLAGa0220da00 [2020-07-21 10:54:33,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7cac459/a31345576dab4cf7aa4c0b711b34b6cd [2020-07-21 10:54:33,018 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:54:33,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:54:33,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:54:33,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:54:33,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:54:33,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:54:33" (1/1) ... [2020-07-21 10:54:33,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4487fdd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33, skipping insertion in model container [2020-07-21 10:54:33,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:54:33" (1/1) ... [2020-07-21 10:54:33,037 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:54:33,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:54:33,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:54:33,218 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:54:33,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:54:33,249 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:54:33,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33 WrapperNode [2020-07-21 10:54:33,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:54:33,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:54:33,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:54:33,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:54:33,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33" (1/1) ... [2020-07-21 10:54:33,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33" (1/1) ... [2020-07-21 10:54:33,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33" (1/1) ... [2020-07-21 10:54:33,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33" (1/1) ... [2020-07-21 10:54:33,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33" (1/1) ... [2020-07-21 10:54:33,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33" (1/1) ... [2020-07-21 10:54:33,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33" (1/1) ... [2020-07-21 10:54:33,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:54:33,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:54:33,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:54:33,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:54:33,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33" (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 10:54:33,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:54:33,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:54:33,439 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 10:54:33,439 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:54:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:54:33,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:54:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 10:54:33,440 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:54:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:54:33,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:54:33,601 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:54:33,602 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:54:33,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:54:33 BoogieIcfgContainer [2020-07-21 10:54:33,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:54:33,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:54:33,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:54:33,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:54:33,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:54:33" (1/3) ... [2020-07-21 10:54:33,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35be8820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:54:33, skipping insertion in model container [2020-07-21 10:54:33,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:54:33" (2/3) ... [2020-07-21 10:54:33,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35be8820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:54:33, skipping insertion in model container [2020-07-21 10:54:33,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:54:33" (3/3) ... [2020-07-21 10:54:33,612 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_25-1.c [2020-07-21 10:54:33,620 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:54:33,627 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:54:33,641 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:54:33,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:54:33,665 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:54:33,666 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:54:33,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:54:33,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:54:33,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:54:33,666 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:54:33,666 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:54:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 10:54:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:54:33,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:33,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:33,693 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 10:54:33,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:33,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048457311] [2020-07-21 10:54:33,710 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 10:54:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:33,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:54:33,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:33,869 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 10:54:33,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:54:33,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048457311] [2020-07-21 10:54:33,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:54:33,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:54:33,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382049604] [2020-07-21 10:54:33,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:54:33,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:33,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:54:33,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:54:33,900 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 10:54:34,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:34,015 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 10:54:34,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:54:34,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:54:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:34,028 INFO L225 Difference]: With dead ends: 35 [2020-07-21 10:54:34,029 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 10:54:34,032 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 10:54:34,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 10:54:34,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 10:54:34,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:54:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:54:34,079 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 10:54:34,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:34,080 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:54:34,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:54:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:54:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:54:34,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:34,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:34,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:34,301 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:34,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:34,302 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 10:54:34,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:34,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927416642] [2020-07-21 10:54:34,304 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 10:54:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:34,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:54:34,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:34,390 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 10:54:34,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:54:34,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927416642] [2020-07-21 10:54:34,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:54:34,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:54:34,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683690130] [2020-07-21 10:54:34,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:54:34,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:34,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:54:34,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:54:34,400 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 10:54:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:34,468 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 10:54:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:54:34,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:54:34,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:34,470 INFO L225 Difference]: With dead ends: 27 [2020-07-21 10:54:34,471 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 10:54:34,472 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 10:54:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 10:54:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 10:54:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:54:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:54:34,480 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 10:54:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:34,481 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:54:34,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:54:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:54:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:54:34,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:34,483 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:34,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:34,699 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:34,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 10:54:34,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:34,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313514381] [2020-07-21 10:54:34,702 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 10:54:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:34,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:54:34,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:54:34,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:35,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:54:35,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313514381] [2020-07-21 10:54:35,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:35,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:54:35,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943073787] [2020-07-21 10:54:35,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:54:35,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:35,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:54:35,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:54:35,096 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 10:54:35,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:35,203 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 10:54:35,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:54:35,203 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 10:54:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:35,205 INFO L225 Difference]: With dead ends: 32 [2020-07-21 10:54:35,206 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 10:54:35,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:54:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 10:54:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 10:54:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:54:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:54:35,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 10:54:35,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:35,216 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:54:35,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:54:35,216 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:54:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:54:35,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:35,218 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:35,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:35,433 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:35,434 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 10:54:35,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:35,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724935725] [2020-07-21 10:54:35,435 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 10:54:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:54:35,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:54:35,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:35,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:54:35,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724935725] [2020-07-21 10:54:35,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:35,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:54:35,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89862059] [2020-07-21 10:54:35,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:54:35,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:35,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:54:35,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:54:35,711 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 10:54:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:35,819 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 10:54:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:54:35,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 10:54:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:35,825 INFO L225 Difference]: With dead ends: 37 [2020-07-21 10:54:35,826 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 10:54:35,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:54:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 10:54:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 10:54:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:54:35,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:54:35,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 10:54:35,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:35,844 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:54:35,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:54:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:54:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:54:35,848 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:35,849 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:36,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:36,063 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:36,065 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 10:54:36,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:36,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485763842] [2020-07-21 10:54:36,066 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 10:54:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:36,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:54:36,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 10:54:36,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:36,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:36,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:36,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:36,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 10:54:36,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485763842] [2020-07-21 10:54:36,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:36,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:54:36,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248980369] [2020-07-21 10:54:36,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:54:36,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:36,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:54:36,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:54:36,481 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 10:54:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:36,690 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 10:54:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:54:36,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 10:54:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:36,692 INFO L225 Difference]: With dead ends: 42 [2020-07-21 10:54:36,693 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 10:54:36,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:54:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 10:54:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 10:54:36,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:54:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:54:36,713 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 10:54:36,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:36,713 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:54:36,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:54:36,713 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:54:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 10:54:36,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:36,719 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:36,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:36,920 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:36,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 10:54:36,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:36,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92423715] [2020-07-21 10:54:36,921 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 10:54:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:36,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:54:36,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 10:54:36,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:37,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:37,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:37,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 10:54:37,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92423715] [2020-07-21 10:54:37,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:37,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:54:37,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892265572] [2020-07-21 10:54:37,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:54:37,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:37,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:54:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:54:37,308 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 10:54:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:37,459 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 10:54:37,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:54:37,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 10:54:37,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:37,465 INFO L225 Difference]: With dead ends: 47 [2020-07-21 10:54:37,465 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 10:54:37,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:54:37,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 10:54:37,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 10:54:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:54:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:54:37,488 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 10:54:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:37,490 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:54:37,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:54:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:54:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 10:54:37,493 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:37,493 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:37,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:37,695 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:37,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:37,695 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 10:54:37,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:37,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798824897] [2020-07-21 10:54:37,697 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 10:54:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:54:37,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 10:54:37,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:38,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:38,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:38,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:38,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:38,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 10:54:38,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798824897] [2020-07-21 10:54:38,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:38,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 10:54:38,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143559068] [2020-07-21 10:54:38,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:54:38,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:38,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:54:38,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:54:38,407 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 10:54:38,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:38,575 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 10:54:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:54:38,576 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 10:54:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:38,578 INFO L225 Difference]: With dead ends: 52 [2020-07-21 10:54:38,578 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 10:54:38,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:54:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 10:54:38,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 10:54:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:54:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:54:38,595 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 10:54:38,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:38,595 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:54:38,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:54:38,595 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:54:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 10:54:38,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:38,598 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:38,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:38,813 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:38,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 10:54:38,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:38,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428057599] [2020-07-21 10:54:38,815 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 10:54:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:38,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:54:38,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 10:54:38,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:39,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:39,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:39,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:39,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 10:54:39,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428057599] [2020-07-21 10:54:39,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:39,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 10:54:39,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064900473] [2020-07-21 10:54:39,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:54:39,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:54:39,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:54:39,561 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 10:54:39,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:39,703 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 10:54:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:54:39,706 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 10:54:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:39,710 INFO L225 Difference]: With dead ends: 57 [2020-07-21 10:54:39,710 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 10:54:39,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:54:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 10:54:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 10:54:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:54:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:54:39,740 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 10:54:39,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:39,741 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:54:39,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:54:39,741 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:54:39,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 10:54:39,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:39,745 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:39,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:39,955 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:39,956 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 10:54:39,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:39,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841702835] [2020-07-21 10:54:39,957 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 10:54:40,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:40,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:54:40,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 10:54:40,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:40,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:40,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:40,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:41,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:41,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 10:54:41,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841702835] [2020-07-21 10:54:41,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:41,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 10:54:41,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723983636] [2020-07-21 10:54:41,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:54:41,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:41,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:54:41,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:54:41,111 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 10:54:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:41,379 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 10:54:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:54:41,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 10:54:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:41,383 INFO L225 Difference]: With dead ends: 62 [2020-07-21 10:54:41,384 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 10:54:41,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:54:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 10:54:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 10:54:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 10:54:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 10:54:41,397 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 10:54:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:41,397 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 10:54:41,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:54:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 10:54:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 10:54:41,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:41,400 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:41,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:41,614 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 10:54:41,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:41,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669156756] [2020-07-21 10:54:41,616 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 10:54:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:41,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:54:41,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-21 10:54:41,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:42,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:42,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:42,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:42,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:42,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:42,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-21 10:54:42,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669156756] [2020-07-21 10:54:42,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:42,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 10:54:42,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905948331] [2020-07-21 10:54:42,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:54:42,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:42,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:54:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:54:42,903 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 10:54:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:43,078 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 10:54:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:54:43,079 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 10:54:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:43,082 INFO L225 Difference]: With dead ends: 67 [2020-07-21 10:54:43,082 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 10:54:43,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:54:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 10:54:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 10:54:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 10:54:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 10:54:43,094 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 10:54:43,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:43,095 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 10:54:43,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:54:43,095 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 10:54:43,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 10:54:43,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:43,100 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:43,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:43,314 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:43,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:43,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 10:54:43,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:43,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016218313] [2020-07-21 10:54:43,316 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 10:54:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:43,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:54:43,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 10:54:43,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:44,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:45,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:45,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:45,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:45,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:45,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:45,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 10:54:45,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016218313] [2020-07-21 10:54:45,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:45,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 10:54:45,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432758232] [2020-07-21 10:54:45,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:54:45,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:45,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:54:45,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:54:45,475 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 10:54:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:45,669 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 10:54:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:54:45,670 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 10:54:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:45,673 INFO L225 Difference]: With dead ends: 72 [2020-07-21 10:54:45,673 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 10:54:45,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:54:45,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 10:54:45,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 10:54:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 10:54:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 10:54:45,686 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 10:54:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:45,687 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 10:54:45,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:54:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 10:54:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-07-21 10:54:45,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:45,693 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:45,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:45,907 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:45,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1101007572, now seen corresponding path program 5 times [2020-07-21 10:54:45,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:45,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [789334916] [2020-07-21 10:54:45,909 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 10:54:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:46,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:54:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1061 refuted. 0 times theorem prover too weak. 3827 trivial. 0 not checked. [2020-07-21 10:54:46,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:47,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:47,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:47,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:47,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:47,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:48,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1101 refuted. 0 times theorem prover too weak. 3787 trivial. 0 not checked. [2020-07-21 10:54:48,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [789334916] [2020-07-21 10:54:48,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:48,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 10:54:48,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261225866] [2020-07-21 10:54:48,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:54:48,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:48,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:54:48,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:54:48,136 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 10:54:48,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:48,387 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 10:54:48,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:54:48,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 300 [2020-07-21 10:54:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:48,391 INFO L225 Difference]: With dead ends: 77 [2020-07-21 10:54:48,391 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 10:54:48,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 572 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:54:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 10:54:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 10:54:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 10:54:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 10:54:48,406 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 300 [2020-07-21 10:54:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:48,407 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 10:54:48,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:54:48,408 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 10:54:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-21 10:54:48,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:48,412 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:48,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:48,626 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash -897924696, now seen corresponding path program 6 times [2020-07-21 10:54:48,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:48,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235891694] [2020-07-21 10:54:48,627 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 10:54:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:48,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:54:48,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12915 backedges. 306 proven. 1995 refuted. 0 times theorem prover too weak. 10614 trivial. 0 not checked. [2020-07-21 10:54:49,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:50,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:51,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:51,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:51,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:51,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:52,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:52,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:52,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12915 backedges. 306 proven. 2046 refuted. 0 times theorem prover too weak. 10563 trivial. 0 not checked. [2020-07-21 10:54:52,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235891694] [2020-07-21 10:54:52,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:52,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 10:54:52,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564472221] [2020-07-21 10:54:52,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:54:52,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:52,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:54:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:54:52,257 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 10:54:52,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:52,633 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 10:54:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:54:52,639 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 468 [2020-07-21 10:54:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:52,643 INFO L225 Difference]: With dead ends: 82 [2020-07-21 10:54:52,643 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 10:54:52,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 905 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:54:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 10:54:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 10:54:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 10:54:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 10:54:52,657 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 468 [2020-07-21 10:54:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:52,658 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 10:54:52,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:54:52,659 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 10:54:52,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 10:54:52,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:52,662 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:52,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:52,875 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:52,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 10:54:52,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:52,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652242418] [2020-07-21 10:54:52,877 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 10:54:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:53,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:54:53,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-21 10:54:53,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:54:54,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:55,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:55,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:56,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:56,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:56,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:56,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:56,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:56,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:54:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-21 10:54:56,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652242418] [2020-07-21 10:54:56,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:54:56,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 10:54:56,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785315423] [2020-07-21 10:54:56,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:54:56,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:54:56,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:54:56,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:54:56,578 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 10:54:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:54:57,103 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 10:54:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:54:57,104 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-21 10:54:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:54:57,110 INFO L225 Difference]: With dead ends: 87 [2020-07-21 10:54:57,110 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 10:54:57,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:54:57,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 10:54:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 10:54:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 10:54:57,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 10:54:57,148 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-21 10:54:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:54:57,150 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 10:54:57,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:54:57,150 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 10:54:57,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 10:54:57,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:54:57,165 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 67, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:54:57,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:54:57,379 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:54:57,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:54:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1701713687, now seen corresponding path program 7 times [2020-07-21 10:54:57,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:54:57,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162060041] [2020-07-21 10:54:57,381 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 10:54:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:54:57,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1945 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:54:57,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:54:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 778 proven. 4406 refuted. 0 times theorem prover too weak. 40653 trivial. 0 not checked. [2020-07-21 10:54:58,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:01,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:01,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:02,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:03,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:03,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:03,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:03,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:03,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:03,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:04,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:04,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:04,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 778 proven. 4476 refuted. 0 times theorem prover too weak. 40583 trivial. 0 not checked. [2020-07-21 10:55:04,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162060041] [2020-07-21 10:55:04,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:04,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 10:55:04,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66585476] [2020-07-21 10:55:04,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:55:04,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:55:04,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:55:04,491 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 10:55:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:05,091 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 10:55:05,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:55:05,092 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 871 [2020-07-21 10:55:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:05,099 INFO L225 Difference]: With dead ends: 92 [2020-07-21 10:55:05,099 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 10:55:05,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1707 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:55:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 10:55:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 10:55:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 10:55:05,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 10:55:05,128 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 871 [2020-07-21 10:55:05,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:05,131 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 10:55:05,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:55:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 10:55:05,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2020-07-21 10:55:05,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:05,149 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 147, 89, 89, 89, 89, 89, 89, 89, 58, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:05,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:05,364 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash 104339052, now seen corresponding path program 7 times [2020-07-21 10:55:05,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:05,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477238055] [2020-07-21 10:55:05,367 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 10:55:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:05,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2728 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:55:05,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 90119 backedges. 893 proven. 6738 refuted. 0 times theorem prover too weak. 82488 trivial. 0 not checked. [2020-07-21 10:55:06,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:10,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:10,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:12,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:12,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:12,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:13,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 90119 backedges. 893 proven. 6815 refuted. 0 times theorem prover too weak. 82411 trivial. 0 not checked. [2020-07-21 10:55:14,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477238055] [2020-07-21 10:55:14,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:14,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 10:55:14,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626087445] [2020-07-21 10:55:14,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:55:14,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:14,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:55:14,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:55:14,998 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-21 10:55:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:15,679 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 10:55:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:55:15,680 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1228 [2020-07-21 10:55:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:15,687 INFO L225 Difference]: With dead ends: 97 [2020-07-21 10:55:15,687 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 10:55:15,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 2420 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:55:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 10:55:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 10:55:15,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 10:55:15,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 10:55:15,708 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1228 [2020-07-21 10:55:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:15,711 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 10:55:15,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:55:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 10:55:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1951 [2020-07-21 10:55:15,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:15,752 INFO L422 BasicCegarLoop]: trace histogram [299, 299, 150, 149, 149, 149, 149, 149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:15,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:15,968 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:15,969 INFO L82 PathProgramCache]: Analyzing trace with hash 621098440, now seen corresponding path program 8 times [2020-07-21 10:55:15,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:15,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227220222] [2020-07-21 10:55:15,969 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 10:55:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:16,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 4352 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:55:16,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1708 proven. 11918 refuted. 0 times theorem prover too weak. 219708 trivial. 0 not checked. [2020-07-21 10:55:18,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:25,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:27,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:29,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:29,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:29,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:30,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1708 proven. 12010 refuted. 0 times theorem prover too weak. 219616 trivial. 0 not checked. [2020-07-21 10:55:32,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227220222] [2020-07-21 10:55:32,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:32,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 10:55:32,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324510261] [2020-07-21 10:55:32,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:55:32,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:32,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:55:32,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:55:32,218 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-21 10:55:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:32,714 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 10:55:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:55:32,715 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1950 [2020-07-21 10:55:32,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:32,723 INFO L225 Difference]: With dead ends: 102 [2020-07-21 10:55:32,724 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 10:55:32,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3909 GetRequests, 3861 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:55:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 10:55:32,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 10:55:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 10:55:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 10:55:32,742 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1950 [2020-07-21 10:55:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:32,745 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 10:55:32,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:55:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 10:55:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-07-21 10:55:32,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:32,776 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 212, 122, 122, 122, 122, 122, 122, 122, 90, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:32,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:32,991 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:32,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:32,992 INFO L82 PathProgramCache]: Analyzing trace with hash 249367267, now seen corresponding path program 8 times [2020-07-21 10:55:32,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:32,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130885576] [2020-07-21 10:55:32,993 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 10:55:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:33,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 3749 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:55:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1545 proven. 10458 refuted. 0 times theorem prover too weak. 159447 trivial. 0 not checked. [2020-07-21 10:55:35,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:40,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:43,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:43,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:44,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:44,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:45,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:46,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:55:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1545 proven. 10558 refuted. 0 times theorem prover too weak. 159347 trivial. 0 not checked. [2020-07-21 10:55:47,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130885576] [2020-07-21 10:55:47,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:55:47,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 10:55:47,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199357287] [2020-07-21 10:55:47,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 10:55:47,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:55:47,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 10:55:47,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:55:47,182 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 23 states. [2020-07-21 10:55:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:55:47,717 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-21 10:55:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:55:47,718 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1689 [2020-07-21 10:55:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:55:47,724 INFO L225 Difference]: With dead ends: 107 [2020-07-21 10:55:47,725 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 10:55:47,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3338 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 10:55:47,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 10:55:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-21 10:55:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 10:55:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 10:55:47,742 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1689 [2020-07-21 10:55:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:55:47,744 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 10:55:47,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 10:55:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 10:55:47,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2341 [2020-07-21 10:55:47,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:55:47,784 INFO L422 BasicCegarLoop]: trace histogram [359, 359, 180, 179, 179, 179, 179, 179, 179, 179, 179, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:55:47,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:55:48,000 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:55:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:55:48,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1393099828, now seen corresponding path program 9 times [2020-07-21 10:55:48,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:55:48,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968940403] [2020-07-21 10:55:48,003 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 10:55:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:55:48,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 5222 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:55:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:55:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 336699 backedges. 2291 proven. 16027 refuted. 0 times theorem prover too weak. 318381 trivial. 0 not checked. [2020-07-21 10:55:50,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:55:59,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:03,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:05,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:06,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:06,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:07,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:07,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:08,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:08,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:08,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:08,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:08,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 336699 backedges. 2291 proven. 16144 refuted. 0 times theorem prover too weak. 318264 trivial. 0 not checked. [2020-07-21 10:56:10,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968940403] [2020-07-21 10:56:10,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:10,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 10:56:10,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958782083] [2020-07-21 10:56:10,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 10:56:10,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:10,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 10:56:10,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:56:10,391 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 25 states. [2020-07-21 10:56:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:11,342 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-21 10:56:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:56:11,343 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2340 [2020-07-21 10:56:11,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:11,351 INFO L225 Difference]: With dead ends: 112 [2020-07-21 10:56:11,351 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 10:56:11,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4690 GetRequests, 4637 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 10:56:11,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 10:56:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-21 10:56:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 10:56:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 10:56:11,379 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2340 [2020-07-21 10:56:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:11,381 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 10:56:11,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 10:56:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 10:56:11,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3629 [2020-07-21 10:56:11,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:11,471 INFO L422 BasicCegarLoop]: trace histogram [531, 531, 435, 265, 265, 265, 265, 265, 265, 265, 170, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:11,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:11,672 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:11,675 INFO L82 PathProgramCache]: Analyzing trace with hash -161498836, now seen corresponding path program 9 times [2020-07-21 10:56:11,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:11,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699568944] [2020-07-21 10:56:11,676 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 10:56:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:13,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 8056 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 10:56:13,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 797175 backedges. 3064 proven. 26230 refuted. 0 times theorem prover too weak. 767881 trivial. 0 not checked. [2020-07-21 10:56:18,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:56:32,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:38,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:40,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:40,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:41,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:42,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:43,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:43,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:43,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:43,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:43,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:43,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:56:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 797175 backedges. 3064 proven. 26356 refuted. 0 times theorem prover too weak. 767755 trivial. 0 not checked. [2020-07-21 10:56:47,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699568944] [2020-07-21 10:56:47,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:56:47,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 10:56:47,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689805482] [2020-07-21 10:56:47,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 10:56:47,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:56:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 10:56:47,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:56:47,788 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 25 states. [2020-07-21 10:56:48,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:56:48,651 INFO L93 Difference]: Finished difference Result 117 states and 518 transitions. [2020-07-21 10:56:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:56:48,652 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 3628 [2020-07-21 10:56:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:56:48,660 INFO L225 Difference]: With dead ends: 117 [2020-07-21 10:56:48,660 INFO L226 Difference]: Without dead ends: 113 [2020-07-21 10:56:48,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7265 GetRequests, 7212 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 10:56:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-21 10:56:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-07-21 10:56:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 10:56:48,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 10:56:48,679 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 3628 [2020-07-21 10:56:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:56:48,682 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 10:56:48,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 10:56:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 10:56:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4109 [2020-07-21 10:56:48,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:56:48,797 INFO L422 BasicCegarLoop]: trace histogram [631, 631, 316, 315, 315, 315, 315, 315, 315, 315, 315, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:56:48,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:56:48,998 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:56:48,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:56:49,000 INFO L82 PathProgramCache]: Analyzing trace with hash -268558652, now seen corresponding path program 10 times [2020-07-21 10:56:49,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:56:49,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343080371] [2020-07-21 10:56:49,001 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 10:56:50,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:56:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 9166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 10:56:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:56:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1042335 backedges. 4162 proven. 31793 refuted. 0 times theorem prover too weak. 1006380 trivial. 0 not checked. [2020-07-21 10:56:56,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:57:12,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:12,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:19,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:22,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:24,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:26,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:26,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:26,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:27,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:27,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:27,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:27,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:57:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1042335 backedges. 4162 proven. 31938 refuted. 0 times theorem prover too weak. 1006235 trivial. 0 not checked. [2020-07-21 10:57:33,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343080371] [2020-07-21 10:57:33,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:57:33,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 10:57:33,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530219975] [2020-07-21 10:57:33,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 10:57:33,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:57:33,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 10:57:33,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:57:33,015 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 27 states. [2020-07-21 10:57:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:57:33,850 INFO L93 Difference]: Finished difference Result 122 states and 564 transitions. [2020-07-21 10:57:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:57:33,853 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 4108 [2020-07-21 10:57:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:57:33,860 INFO L225 Difference]: With dead ends: 122 [2020-07-21 10:57:33,860 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 10:57:33,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8227 GetRequests, 8169 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 10:57:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 10:57:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2020-07-21 10:57:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 10:57:33,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 10:57:33,881 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 4108 [2020-07-21 10:57:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:57:33,884 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 10:57:33,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 10:57:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 10:57:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5429 [2020-07-21 10:57:34,094 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:57:34,096 INFO L422 BasicCegarLoop]: trace histogram [795, 795, 651, 397, 397, 397, 397, 397, 397, 397, 254, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:57:34,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:57:34,297 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:57:34,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:57:34,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1549176916, now seen corresponding path program 10 times [2020-07-21 10:57:34,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:57:34,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328282213] [2020-07-21 10:57:34,301 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 10:57:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:57:36,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 12052 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 10:57:36,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:57:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1788459 backedges. 5062 proven. 43575 refuted. 0 times theorem prover too weak. 1739822 trivial. 0 not checked. [2020-07-21 10:57:45,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:58:08,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:14,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:19,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:19,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:21,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:21,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:23,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:24,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:25,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:58:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1788459 backedges. 5062 proven. 43730 refuted. 0 times theorem prover too weak. 1739667 trivial. 0 not checked. [2020-07-21 10:58:33,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328282213] [2020-07-21 10:58:33,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:58:33,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 10:58:33,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899967951] [2020-07-21 10:58:33,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 10:58:33,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:58:33,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 10:58:33,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:58:33,906 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 27 states. [2020-07-21 10:58:34,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:58:34,910 INFO L93 Difference]: Finished difference Result 127 states and 612 transitions. [2020-07-21 10:58:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 10:58:34,913 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 5428 [2020-07-21 10:58:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:58:34,926 INFO L225 Difference]: With dead ends: 127 [2020-07-21 10:58:34,926 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 10:58:34,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10866 GetRequests, 10808 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 10:58:34,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 10:58:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-07-21 10:58:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 10:58:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 10:58:34,953 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 5428 [2020-07-21 10:58:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:58:34,957 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 10:58:34,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 10:58:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 10:58:35,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8763 [2020-07-21 10:58:35,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:58:35,303 INFO L422 BasicCegarLoop]: trace histogram [1347, 1347, 674, 673, 673, 673, 673, 673, 673, 673, 673, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:58:35,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:58:35,504 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:58:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:58:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1910946654, now seen corresponding path program 11 times [2020-07-21 10:58:35,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:58:35,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018588393] [2020-07-21 10:58:35,508 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 10:58:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:58:38,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 19548 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 10:58:38,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:59:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4756764 backedges. 8790 proven. 75977 refuted. 0 times theorem prover too weak. 4671997 trivial. 0 not checked. [2020-07-21 10:59:01,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:59:43,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:59:57,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:05,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:12,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:12,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:14,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:16,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:16,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:17,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,771 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:18,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:00:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4756764 backedges. 8790 proven. 76153 refuted. 0 times theorem prover too weak. 4671821 trivial. 0 not checked. [2020-07-21 11:00:41,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018588393] [2020-07-21 11:00:41,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:00:41,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 11:00:41,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5067793] [2020-07-21 11:00:41,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 11:00:41,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:00:41,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 11:00:41,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:00:41,482 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 29 states. [2020-07-21 11:00:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:00:42,585 INFO L93 Difference]: Finished difference Result 132 states and 662 transitions. [2020-07-21 11:00:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 11:00:42,586 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 8762 [2020-07-21 11:00:42,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:00:42,603 INFO L225 Difference]: With dead ends: 132 [2020-07-21 11:00:42,604 INFO L226 Difference]: Without dead ends: 128 [2020-07-21 11:00:42,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17536 GetRequests, 17473 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 11:00:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-21 11:00:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2020-07-21 11:00:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 11:00:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 11:00:42,629 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 8762 [2020-07-21 11:00:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:00:42,635 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 11:00:42,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 11:00:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 11:00:43,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9159 [2020-07-21 11:00:43,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:00:43,016 INFO L422 BasicCegarLoop]: trace histogram [1349, 1349, 1057, 674, 674, 674, 674, 674, 674, 674, 383, 292, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:00:43,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:00:43,230 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:00:43,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:00:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1057466947, now seen corresponding path program 11 times [2020-07-21 11:00:43,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:00:43,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049641144] [2020-07-21 11:00:43,234 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 11:00:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:00:46,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 20343 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 11:00:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:01:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5102204 backedges. 10006 proven. 80135 refuted. 0 times theorem prover too weak. 5012063 trivial. 0 not checked. [2020-07-21 11:01:11,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:01:55,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:01:55,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:13,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:28,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:28,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:34,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:34,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:39,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:39,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:41,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:41,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:42,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:43,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:44,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:44,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:44,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:44,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:02:44,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:03:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5102204 backedges. 10006 proven. 80322 refuted. 0 times theorem prover too weak. 5011876 trivial. 0 not checked. [2020-07-21 11:03:09,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049641144] [2020-07-21 11:03:09,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:03:09,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 11:03:09,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127355048] [2020-07-21 11:03:09,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 11:03:09,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:03:09,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 11:03:09,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:03:09,580 INFO L87 Difference]: Start difference. First operand 76 states and 234 transitions. Second operand 29 states. [2020-07-21 11:03:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:03:10,955 INFO L93 Difference]: Finished difference Result 137 states and 714 transitions. [2020-07-21 11:03:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 11:03:10,956 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 9158 [2020-07-21 11:03:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:03:10,969 INFO L225 Difference]: With dead ends: 137 [2020-07-21 11:03:10,969 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 11:03:10,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18327 GetRequests, 18264 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 11:03:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 11:03:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2020-07-21 11:03:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 11:03:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 11:03:10,995 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 9158 [2020-07-21 11:03:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:03:10,999 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 11:03:10,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 11:03:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 11:03:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18136 [2020-07-21 11:03:13,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:03:13,194 INFO L422 BasicCegarLoop]: trace histogram [2789, 2789, 1395, 1394, 1394, 1394, 1394, 1394, 1394, 1394, 1394, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:03:13,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:03:13,395 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:03:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:03:13,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1122062087, now seen corresponding path program 12 times [2020-07-21 11:03:13,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:03:13,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847780338] [2020-07-21 11:03:13,401 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 11:03:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:03:19,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 40457 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 11:03:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:04:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20406069 backedges. 20534 proven. 171004 refuted. 0 times theorem prover too weak. 20214531 trivial. 0 not checked. [2020-07-21 11:04:55,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:05:13,392 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 11:06:37,192 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:06:37,299 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 11:06:37,419 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:06:37,531 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 11:06:37,642 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 11:06:37,746 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 11:06:38,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:29,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:29,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:07:40,194 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 1