/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/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:22,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:22,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:22,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:22,688 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:22,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:22,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:22,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:22,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:22,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:22,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:22,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:22,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:22,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:22,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:22,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:22,701 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:22,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:22,703 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:22,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:22,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:22,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:22,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:22,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:22,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 10:40:22,712 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 10:40:22,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 10:40:22,713 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 10:40:22,713 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 10:40:22,714 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 10:40:22,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 10:40:22,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 10:40:22,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 10:40:22,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 10:40:22,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 10:40:22,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 10:40:22,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 10:40:22,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 10:40:22,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:22,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:22,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:22,721 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 10:40:22,735 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:22,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:22,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:22,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:22,737 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:22,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:22,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:22,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:22,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:22,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:22,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:22,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:22,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:22,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:22,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:22,739 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:22,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:22,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:22,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:22,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:22,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:22,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:22,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:22,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:22,741 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:22,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:22,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:22,742 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:22,742 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:22,742 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 10:40:23,043 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:23,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:23,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:23,066 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:23,067 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:23,067 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-21 10:40:23,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7a9e3239/d3700544144240e496df7a4883ccf8ed/FLAG2a4c946f2 [2020-07-21 10:40:23,624 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:23,629 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-07-21 10:40:23,642 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7a9e3239/d3700544144240e496df7a4883ccf8ed/FLAG2a4c946f2 [2020-07-21 10:40:23,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e7a9e3239/d3700544144240e496df7a4883ccf8ed [2020-07-21 10:40:23,970 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:23,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:23,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:23,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:23,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:23,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:23" (1/1) ... [2020-07-21 10:40:23,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c956074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:23, skipping insertion in model container [2020-07-21 10:40:23,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:23" (1/1) ... [2020-07-21 10:40:23,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:24,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:24,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:24,274 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:24,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:24,425 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:24,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24 WrapperNode [2020-07-21 10:40:24,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:24,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:24,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:24,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:24,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,473 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:24,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:24,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:24,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:24,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (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 10:40:24,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 10:40:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 10:40:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 10:40:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 10:40:24,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:24,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 10:40:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 10:40:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 10:40:24,564 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 10:40:24,565 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 10:40:24,565 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 10:40:24,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:24,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:24,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:25,095 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:25,095 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 10:40:25,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:25 BoogieIcfgContainer [2020-07-21 10:40:25,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:25,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:25,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:25,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:25,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:23" (1/3) ... [2020-07-21 10:40:25,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1f826e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:25, skipping insertion in model container [2020-07-21 10:40:25,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (2/3) ... [2020-07-21 10:40:25,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d1f826e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:25, skipping insertion in model container [2020-07-21 10:40:25,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:25" (3/3) ... [2020-07-21 10:40:25,109 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-07-21 10:40:25,119 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:25,128 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:25,143 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:25,168 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:25,168 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:25,168 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:25,169 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:25,169 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:25,169 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:25,169 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:25,169 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-21 10:40:25,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 10:40:25,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:25,199 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:25,199 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:25,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-21 10:40:25,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:25,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991094945] [2020-07-21 10:40:25,213 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 10:40:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:25,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 10:40:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 10:40:25,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:25,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991094945] [2020-07-21 10:40:25,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:25,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 10:40:25,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714259745] [2020-07-21 10:40:25,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 10:40:25,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:25,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 10:40:25,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 10:40:25,500 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-07-21 10:40:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:25,568 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2020-07-21 10:40:25,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 10:40:25,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-21 10:40:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:25,581 INFO L225 Difference]: With dead ends: 118 [2020-07-21 10:40:25,581 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:40:25,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 10:40:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:40:25,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-21 10:40:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 10:40:25,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-07-21 10:40:25,635 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2020-07-21 10:40:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:25,638 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-07-21 10:40:25,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 10:40:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-07-21 10:40:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 10:40:25,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:25,641 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:25,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:25,855 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:25,855 INFO L82 PathProgramCache]: Analyzing trace with hash -880454641, now seen corresponding path program 1 times [2020-07-21 10:40:25,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:25,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382297875] [2020-07-21 10:40:25,856 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 10:40:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:25,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 10:40:25,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:25,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 10:40:25,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:25,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382297875] [2020-07-21 10:40:25,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:25,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:25,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247905136] [2020-07-21 10:40:25,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:25,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:25,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:25,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:25,959 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 4 states. [2020-07-21 10:40:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:25,995 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-07-21 10:40:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 10:40:25,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-07-21 10:40:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:25,998 INFO L225 Difference]: With dead ends: 64 [2020-07-21 10:40:25,999 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:40:26,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:40:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-21 10:40:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 10:40:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2020-07-21 10:40:26,010 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 50 [2020-07-21 10:40:26,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:26,010 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2020-07-21 10:40:26,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:26,011 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2020-07-21 10:40:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 10:40:26,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:26,013 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:26,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:26,222 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:26,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1901522995, now seen corresponding path program 1 times [2020-07-21 10:40:26,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:26,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496256632] [2020-07-21 10:40:26,226 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 10:40:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:26,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:40:26,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:26,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:26,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496256632] [2020-07-21 10:40:26,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:26,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 10:40:26,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120752577] [2020-07-21 10:40:26,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:40:26,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:26,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:40:26,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:26,401 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2020-07-21 10:40:26,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:26,525 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2020-07-21 10:40:26,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:40:26,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-07-21 10:40:26,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:26,529 INFO L225 Difference]: With dead ends: 89 [2020-07-21 10:40:26,529 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 10:40:26,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:40:26,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 10:40:26,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-07-21 10:40:26,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 10:40:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-07-21 10:40:26,545 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 50 [2020-07-21 10:40:26,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:26,546 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-07-21 10:40:26,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:40:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-07-21 10:40:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 10:40:26,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:26,549 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:26,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:26,762 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:26,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:26,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1643357557, now seen corresponding path program 1 times [2020-07-21 10:40:26,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:26,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265722055] [2020-07-21 10:40:26,764 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 10:40:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:40:26,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:26,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:26,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265722055] [2020-07-21 10:40:26,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 10:40:26,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-21 10:40:26,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606700683] [2020-07-21 10:40:26,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 10:40:26,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:26,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 10:40:26,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:26,956 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 7 states. [2020-07-21 10:40:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:27,046 INFO L93 Difference]: Finished difference Result 87 states and 115 transitions. [2020-07-21 10:40:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:40:27,047 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-07-21 10:40:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:27,049 INFO L225 Difference]: With dead ends: 87 [2020-07-21 10:40:27,049 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 10:40:27,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:40:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 10:40:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-07-21 10:40:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 10:40:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 106 transitions. [2020-07-21 10:40:27,064 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 106 transitions. Word has length 50 [2020-07-21 10:40:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:27,064 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 106 transitions. [2020-07-21 10:40:27,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 10:40:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 106 transitions. [2020-07-21 10:40:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:40:27,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:27,067 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:27,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,281 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:27,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1046629615, now seen corresponding path program 1 times [2020-07-21 10:40:27,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:27,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451393932] [2020-07-21 10:40:27,282 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 10:40:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:40:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 10:40:27,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:27,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451393932] [2020-07-21 10:40:27,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:27,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:40:27,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426854230] [2020-07-21 10:40:27,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:27,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:27,371 INFO L87 Difference]: Start difference. First operand 79 states and 106 transitions. Second operand 6 states. [2020-07-21 10:40:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:27,407 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-07-21 10:40:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:27,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-21 10:40:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:27,410 INFO L225 Difference]: With dead ends: 85 [2020-07-21 10:40:27,410 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 10:40:27,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 10:40:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-07-21 10:40:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 10:40:27,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2020-07-21 10:40:27,422 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 52 [2020-07-21 10:40:27,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:27,422 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2020-07-21 10:40:27,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:27,423 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2020-07-21 10:40:27,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:40:27,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:27,425 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:27,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,639 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash 989371313, now seen corresponding path program 1 times [2020-07-21 10:40:27,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:27,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117899559] [2020-07-21 10:40:27,640 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 10:40:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:27,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 10:40:27,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 10:40:27,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:27,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117899559] [2020-07-21 10:40:27,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:27,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:40:27,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813100557] [2020-07-21 10:40:27,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:27,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:27,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:27,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:27,734 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand 6 states. [2020-07-21 10:40:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:27,788 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2020-07-21 10:40:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:27,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-21 10:40:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:27,791 INFO L225 Difference]: With dead ends: 96 [2020-07-21 10:40:27,791 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 10:40:27,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:40:27,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 10:40:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-07-21 10:40:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 10:40:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2020-07-21 10:40:27,802 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 52 [2020-07-21 10:40:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:27,803 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2020-07-21 10:40:27,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2020-07-21 10:40:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 10:40:27,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:27,805 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:28,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,020 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:28,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1437004996, now seen corresponding path program 1 times [2020-07-21 10:40:28,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:28,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17429720] [2020-07-21 10:40:28,022 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 10:40:28,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:40:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 10:40:28,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:28,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17429720] [2020-07-21 10:40:28,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 10:40:28,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 10:40:28,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984444074] [2020-07-21 10:40:28,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:40:28,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:28,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:40:28,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:40:28,229 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand 10 states. [2020-07-21 10:40:28,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:28,379 INFO L93 Difference]: Finished difference Result 162 states and 218 transitions. [2020-07-21 10:40:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:40:28,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-07-21 10:40:28,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:28,382 INFO L225 Difference]: With dead ends: 162 [2020-07-21 10:40:28,382 INFO L226 Difference]: Without dead ends: 110 [2020-07-21 10:40:28,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:40:28,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-21 10:40:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-07-21 10:40:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 10:40:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2020-07-21 10:40:28,397 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 54 [2020-07-21 10:40:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:28,397 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2020-07-21 10:40:28,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:40:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-07-21 10:40:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 10:40:28,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:28,399 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:28,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,614 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash -649172186, now seen corresponding path program 1 times [2020-07-21 10:40:28,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:28,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587954201] [2020-07-21 10:40:28,615 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 10:40:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:28,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:40:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:28,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:28,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:28,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587954201] [2020-07-21 10:40:28,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:28,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 10:40:28,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057543038] [2020-07-21 10:40:28,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:40:28,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:40:28,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:40:28,964 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 15 states. [2020-07-21 10:40:29,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:29,221 INFO L93 Difference]: Finished difference Result 119 states and 160 transitions. [2020-07-21 10:40:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:40:29,222 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-07-21 10:40:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:29,224 INFO L225 Difference]: With dead ends: 119 [2020-07-21 10:40:29,224 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 10:40:29,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:40:29,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 10:40:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-07-21 10:40:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 10:40:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2020-07-21 10:40:29,246 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 57 [2020-07-21 10:40:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:29,246 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2020-07-21 10:40:29,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:40:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2020-07-21 10:40:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 10:40:29,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:29,252 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:29,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:29,458 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:29,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1390837075, now seen corresponding path program 2 times [2020-07-21 10:40:29,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:29,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356075306] [2020-07-21 10:40:29,461 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 10:40:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:29,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 10:40:29,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 10:40:29,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:29,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356075306] [2020-07-21 10:40:29,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:29,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:29,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154387308] [2020-07-21 10:40:29,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:29,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:29,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:29,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:29,557 INFO L87 Difference]: Start difference. First operand 87 states and 117 transitions. Second operand 4 states. [2020-07-21 10:40:29,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:29,624 INFO L93 Difference]: Finished difference Result 176 states and 243 transitions. [2020-07-21 10:40:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 10:40:29,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-07-21 10:40:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:29,628 INFO L225 Difference]: With dead ends: 176 [2020-07-21 10:40:29,628 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 10:40:29,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 10:40:29,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2020-07-21 10:40:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 10:40:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 127 transitions. [2020-07-21 10:40:29,644 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 127 transitions. Word has length 58 [2020-07-21 10:40:29,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:29,645 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 127 transitions. [2020-07-21 10:40:29,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 127 transitions. [2020-07-21 10:40:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 10:40:29,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:29,647 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:29,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:29,861 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:29,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:29,862 INFO L82 PathProgramCache]: Analyzing trace with hash -510940175, now seen corresponding path program 1 times [2020-07-21 10:40:29,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:29,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017082005] [2020-07-21 10:40:29,863 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 10:40:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:29,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 10:40:29,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 10:40:29,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:29,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017082005] [2020-07-21 10:40:29,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:29,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:29,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099049850] [2020-07-21 10:40:29,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:29,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:29,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:29,924 INFO L87 Difference]: Start difference. First operand 93 states and 127 transitions. Second operand 4 states. [2020-07-21 10:40:30,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:30,002 INFO L93 Difference]: Finished difference Result 188 states and 260 transitions. [2020-07-21 10:40:30,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:40:30,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-07-21 10:40:30,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:30,005 INFO L225 Difference]: With dead ends: 188 [2020-07-21 10:40:30,005 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 10:40:30,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:30,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 10:40:30,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 91. [2020-07-21 10:40:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-07-21 10:40:30,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2020-07-21 10:40:30,015 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 58 [2020-07-21 10:40:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:30,015 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2020-07-21 10:40:30,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:30,015 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2020-07-21 10:40:30,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-21 10:40:30,017 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:30,017 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:30,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:30,231 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:30,232 INFO L82 PathProgramCache]: Analyzing trace with hash -113150704, now seen corresponding path program 1 times [2020-07-21 10:40:30,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:30,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470927866] [2020-07-21 10:40:30,233 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 10:40:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:30,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 10:40:30,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 10:40:30,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:30,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470927866] [2020-07-21 10:40:30,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:30,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:30,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636346394] [2020-07-21 10:40:30,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:30,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:30,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:30,296 INFO L87 Difference]: Start difference. First operand 91 states and 121 transitions. Second operand 4 states. [2020-07-21 10:40:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:30,384 INFO L93 Difference]: Finished difference Result 171 states and 221 transitions. [2020-07-21 10:40:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:40:30,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-07-21 10:40:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:30,387 INFO L225 Difference]: With dead ends: 171 [2020-07-21 10:40:30,387 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 10:40:30,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 10:40:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2020-07-21 10:40:30,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 10:40:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-07-21 10:40:30,398 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2020-07-21 10:40:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:30,399 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-07-21 10:40:30,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:30,399 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-07-21 10:40:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-21 10:40:30,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:30,405 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:30,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:30,620 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:30,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1457414028, now seen corresponding path program 1 times [2020-07-21 10:40:30,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:30,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651870398] [2020-07-21 10:40:30,621 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 10:40:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:30,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 10:40:30,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:30,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:30,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651870398] [2020-07-21 10:40:30,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:30,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:30,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84943100] [2020-07-21 10:40:30,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:30,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:30,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:30,688 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 4 states. [2020-07-21 10:40:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:30,741 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2020-07-21 10:40:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 10:40:30,742 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-07-21 10:40:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:30,743 INFO L225 Difference]: With dead ends: 129 [2020-07-21 10:40:30,743 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 10:40:30,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 10:40:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-21 10:40:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 10:40:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-07-21 10:40:30,749 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 64 [2020-07-21 10:40:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:30,750 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-07-21 10:40:30,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-07-21 10:40:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-21 10:40:30,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:30,751 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:30,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:30,965 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:30,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1769332683, now seen corresponding path program 1 times [2020-07-21 10:40:30,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:30,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630005363] [2020-07-21 10:40:30,967 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 10:40:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:31,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:40:31,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:31,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:31,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630005363] [2020-07-21 10:40:31,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:31,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:40:31,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662768308] [2020-07-21 10:40:31,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:40:31,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:31,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:40:31,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:31,044 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 5 states. [2020-07-21 10:40:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:31,148 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2020-07-21 10:40:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:31,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-07-21 10:40:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:31,150 INFO L225 Difference]: With dead ends: 145 [2020-07-21 10:40:31,151 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 10:40:31,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 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 10:40:31,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 10:40:31,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2020-07-21 10:40:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 10:40:31,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-07-21 10:40:31,161 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 66 [2020-07-21 10:40:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:31,162 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-07-21 10:40:31,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:40:31,162 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-07-21 10:40:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 10:40:31,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:31,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:31,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:31,379 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:31,380 INFO L82 PathProgramCache]: Analyzing trace with hash -976969789, now seen corresponding path program 1 times [2020-07-21 10:40:31,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:31,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497135102] [2020-07-21 10:40:31,380 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 10:40:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:31,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:40:31,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:31,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:31,535 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:31,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497135102] [2020-07-21 10:40:31,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:31,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 10:40:31,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822594660] [2020-07-21 10:40:31,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:40:31,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:31,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:40:31,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:31,538 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 8 states. [2020-07-21 10:40:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:31,608 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2020-07-21 10:40:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:31,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-07-21 10:40:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:31,610 INFO L225 Difference]: With dead ends: 156 [2020-07-21 10:40:31,610 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 10:40:31,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:40:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 10:40:31,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-07-21 10:40:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 10:40:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-07-21 10:40:31,619 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 67 [2020-07-21 10:40:31,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:31,619 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-07-21 10:40:31,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:40:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-07-21 10:40:31,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 10:40:31,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:31,621 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:31,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:31,826 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:31,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:31,826 INFO L82 PathProgramCache]: Analyzing trace with hash 376080324, now seen corresponding path program 1 times [2020-07-21 10:40:31,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:31,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120593199] [2020-07-21 10:40:31,827 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 10:40:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:31,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 10:40:31,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:31,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:32,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120593199] [2020-07-21 10:40:32,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:32,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 10:40:32,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863403422] [2020-07-21 10:40:32,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:40:32,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:40:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:40:32,051 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 10 states. [2020-07-21 10:40:38,502 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 10:40:40,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:40,721 INFO L93 Difference]: Finished difference Result 189 states and 233 transitions. [2020-07-21 10:40:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:40:40,722 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-21 10:40:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:40,724 INFO L225 Difference]: With dead ends: 189 [2020-07-21 10:40:40,724 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 10:40:40,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=90, Invalid=149, Unknown=1, NotChecked=0, Total=240 [2020-07-21 10:40:40,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 10:40:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2020-07-21 10:40:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 10:40:40,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2020-07-21 10:40:40,737 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 69 [2020-07-21 10:40:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:40,737 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2020-07-21 10:40:40,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:40:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2020-07-21 10:40:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-21 10:40:40,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:40,739 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:40,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:40,954 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:40,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:40,955 INFO L82 PathProgramCache]: Analyzing trace with hash 152763316, now seen corresponding path program 2 times [2020-07-21 10:40:40,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:40,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129630111] [2020-07-21 10:40:40,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:40:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:41,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:40:41,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:41,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:41,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129630111] [2020-07-21 10:40:41,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:41,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 10:40:41,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273253384] [2020-07-21 10:40:41,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:40:41,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:41,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:40:41,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:40:41,262 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand 14 states. [2020-07-21 10:40:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:41,368 INFO L93 Difference]: Finished difference Result 212 states and 269 transitions. [2020-07-21 10:40:41,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:40:41,369 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-07-21 10:40:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:41,370 INFO L225 Difference]: With dead ends: 212 [2020-07-21 10:40:41,370 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 10:40:41,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:40:41,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 10:40:41,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 98. [2020-07-21 10:40:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 10:40:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-21 10:40:41,383 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 76 [2020-07-21 10:40:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:41,384 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-21 10:40:41,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:40:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-21 10:40:41,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-21 10:40:41,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:41,385 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:41,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:41,600 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:41,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2142751612, now seen corresponding path program 2 times [2020-07-21 10:40:41,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:41,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989801827] [2020-07-21 10:40:41,601 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 10:40:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:41,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:40:41,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:41,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:42,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989801827] [2020-07-21 10:40:42,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:42,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 10:40:42,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715691447] [2020-07-21 10:40:42,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:40:42,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:42,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:40:42,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:40:42,090 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 18 states. [2020-07-21 10:40:53,179 WARN L193 SmtUtils]: Spent 10.66 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 10:40:59,561 WARN L193 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 10:41:08,008 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 10:41:18,673 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 10:41:27,150 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 10:41:39,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:39,884 INFO L93 Difference]: Finished difference Result 223 states and 277 transitions. [2020-07-21 10:41:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 10:41:39,885 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-07-21 10:41:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:39,888 INFO L225 Difference]: With dead ends: 223 [2020-07-21 10:41:39,888 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 10:41:39,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 53.3s TimeCoverageRelationStatistics Valid=313, Invalid=604, Unknown=13, NotChecked=0, Total=930 [2020-07-21 10:41:39,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 10:41:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 108. [2020-07-21 10:41:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 10:41:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2020-07-21 10:41:39,899 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 81 [2020-07-21 10:41:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:39,899 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2020-07-21 10:41:39,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:41:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2020-07-21 10:41:39,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 10:41:39,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:39,901 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:40,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:40,116 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1025892204, now seen corresponding path program 3 times [2020-07-21 10:41:40,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:40,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478741721] [2020-07-21 10:41:40,118 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 10:41:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:40,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:41:40,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 26 proven. 155 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:41:40,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 165 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:41:40,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478741721] [2020-07-21 10:41:40,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:40,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 10:41:40,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283711481] [2020-07-21 10:41:40,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 10:41:40,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:40,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 10:41:40,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:41:40,848 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand 26 states. [2020-07-21 10:41:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:41,044 INFO L93 Difference]: Finished difference Result 320 states and 421 transitions. [2020-07-21 10:41:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 10:41:41,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-07-21 10:41:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:41,047 INFO L225 Difference]: With dead ends: 320 [2020-07-21 10:41:41,047 INFO L226 Difference]: Without dead ends: 218 [2020-07-21 10:41:41,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=383, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:41:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-21 10:41:41,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 134. [2020-07-21 10:41:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 10:41:41,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 168 transitions. [2020-07-21 10:41:41,067 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 168 transitions. Word has length 94 [2020-07-21 10:41:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:41,067 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 168 transitions. [2020-07-21 10:41:41,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 10:41:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 168 transitions. [2020-07-21 10:41:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-21 10:41:41,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:41,069 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:41,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:41,283 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:41,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1813786116, now seen corresponding path program 3 times [2020-07-21 10:41:41,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:41,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837301196] [2020-07-21 10:41:41,295 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 10:41:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 10:41:41,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 27 proven. 273 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:41:41,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 4 proven. 284 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:41:42,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837301196] [2020-07-21 10:41:42,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:42,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-21 10:41:42,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950468940] [2020-07-21 10:41:42,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 10:41:42,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:42,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 10:41:42,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 10:41:42,625 INFO L87 Difference]: Start difference. First operand 134 states and 168 transitions. Second operand 34 states. [2020-07-21 10:42:02,647 WARN L193 SmtUtils]: Spent 11.45 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 10:42:21,145 WARN L193 SmtUtils]: Spent 11.78 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 10:42:51,921 WARN L193 SmtUtils]: Spent 18.62 s on a formula simplification. DAG size of input: 47 DAG size of output: 23 [2020-07-21 10:43:07,200 WARN L193 SmtUtils]: Spent 4.37 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 10:43:32,317 WARN L193 SmtUtils]: Spent 8.34 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-21 10:43:53,903 WARN L193 SmtUtils]: Spent 10.45 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 10:44:08,622 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 10:44:23,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:23,809 INFO L93 Difference]: Finished difference Result 291 states and 365 transitions. [2020-07-21 10:44:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 10:44:23,814 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 105 [2020-07-21 10:44:23,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:23,816 INFO L225 Difference]: With dead ends: 291 [2020-07-21 10:44:23,816 INFO L226 Difference]: Without dead ends: 169 [2020-07-21 10:44:23,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 154.3s TimeCoverageRelationStatistics Valid=923, Invalid=2235, Unknown=34, NotChecked=0, Total=3192 [2020-07-21 10:44:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-21 10:44:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2020-07-21 10:44:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-21 10:44:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 175 transitions. [2020-07-21 10:44:23,830 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 175 transitions. Word has length 105 [2020-07-21 10:44:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:23,830 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 175 transitions. [2020-07-21 10:44:23,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 10:44:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2020-07-21 10:44:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-21 10:44:23,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:23,832 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:24,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:24,033 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:24,034 INFO L82 PathProgramCache]: Analyzing trace with hash -394001836, now seen corresponding path program 4 times [2020-07-21 10:44:24,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:24,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968300480] [2020-07-21 10:44:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:44:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:24,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 10:44:24,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 26 proven. 737 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:44:24,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 4 proven. 747 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:44:26,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968300480] [2020-07-21 10:44:26,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:26,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 10:44:26,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733024733] [2020-07-21 10:44:26,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 10:44:26,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:26,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 10:44:26,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 10:44:26,462 INFO L87 Difference]: Start difference. First operand 138 states and 175 transitions. Second operand 50 states. [2020-07-21 10:44:26,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:27,000 INFO L93 Difference]: Finished difference Result 518 states and 701 transitions. [2020-07-21 10:44:27,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-21 10:44:27,001 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 130 [2020-07-21 10:44:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:27,007 INFO L225 Difference]: With dead ends: 518 [2020-07-21 10:44:27,008 INFO L226 Difference]: Without dead ends: 386 [2020-07-21 10:44:27,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1207, Invalid=1343, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 10:44:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-21 10:44:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 206. [2020-07-21 10:44:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-21 10:44:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2020-07-21 10:44:27,045 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 130 [2020-07-21 10:44:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:27,045 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2020-07-21 10:44:27,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 10:44:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2020-07-21 10:44:27,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 10:44:27,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:27,047 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:27,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:27,263 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:27,264 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 4 times [2020-07-21 10:44:27,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:27,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885218678] [2020-07-21 10:44:27,265 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 10:44:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:44:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 10:44:27,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:27,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885218678] [2020-07-21 10:44:27,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 10:44:27,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 10:44:27,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323214223] [2020-07-21 10:44:27,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:44:27,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:44:27,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:44:27,748 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand 10 states. [2020-07-21 10:44:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:27,995 INFO L93 Difference]: Finished difference Result 226 states and 287 transitions. [2020-07-21 10:44:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:44:27,997 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-21 10:44:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:27,999 INFO L225 Difference]: With dead ends: 226 [2020-07-21 10:44:27,999 INFO L226 Difference]: Without dead ends: 206 [2020-07-21 10:44:28,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:44:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-21 10:44:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-07-21 10:44:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-21 10:44:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 263 transitions. [2020-07-21 10:44:28,024 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 263 transitions. Word has length 135 [2020-07-21 10:44:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:28,025 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 263 transitions. [2020-07-21 10:44:28,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:44:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 263 transitions. [2020-07-21 10:44:28,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 10:44:28,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:28,032 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:28,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:28,238 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-07-21 10:44:28,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:28,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338134355] [2020-07-21 10:44:28,240 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 10:44:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:28,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 10:44:28,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-07-21 10:44:28,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:29,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338134355] [2020-07-21 10:44:29,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 10:44:29,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-21 10:44:29,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120963567] [2020-07-21 10:44:29,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:44:29,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:29,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:44:29,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:44:29,469 INFO L87 Difference]: Start difference. First operand 206 states and 263 transitions. Second operand 14 states. [2020-07-21 10:44:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:29,909 INFO L93 Difference]: Finished difference Result 221 states and 278 transitions. [2020-07-21 10:44:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:44:29,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2020-07-21 10:44:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:29,913 INFO L225 Difference]: With dead ends: 221 [2020-07-21 10:44:29,914 INFO L226 Difference]: Without dead ends: 203 [2020-07-21 10:44:29,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:44:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-21 10:44:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2020-07-21 10:44:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-21 10:44:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 259 transitions. [2020-07-21 10:44:29,930 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 259 transitions. Word has length 135 [2020-07-21 10:44:29,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:29,931 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 259 transitions. [2020-07-21 10:44:29,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:44:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 259 transitions. [2020-07-21 10:44:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 10:44:29,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:29,933 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:30,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:30,149 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:30,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:30,150 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-07-21 10:44:30,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:30,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166124245] [2020-07-21 10:44:30,151 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 10:44:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:30,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:44:30,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-07-21 10:44:30,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:30,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166124245] [2020-07-21 10:44:30,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 10:44:30,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 10:44:30,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955972140] [2020-07-21 10:44:30,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:44:30,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:30,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:44:30,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:44:30,914 INFO L87 Difference]: Start difference. First operand 203 states and 259 transitions. Second operand 10 states. [2020-07-21 10:44:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:31,165 INFO L93 Difference]: Finished difference Result 203 states and 259 transitions. [2020-07-21 10:44:31,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:44:31,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-07-21 10:44:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:31,166 INFO L225 Difference]: With dead ends: 203 [2020-07-21 10:44:31,166 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:44:31,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:44:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:44:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:44:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:44:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:44:31,168 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-21 10:44:31,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:31,169 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:44:31,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:44:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:44:31,169 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:44:31,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:31,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:44:31,840 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-21 10:44:32,324 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 11 [2020-07-21 10:44:32,519 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-21 10:44:32,856 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 449 [2020-07-21 10:44:33,186 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 2253 DAG size of output: 35 [2020-07-21 10:44:33,463 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 2244 DAG size of output: 20 [2020-07-21 10:44:33,777 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 599 [2020-07-21 10:44:33,911 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 9 [2020-07-21 10:44:34,390 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 1026 DAG size of output: 890 [2020-07-21 10:44:35,083 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-07-21 10:44:35,555 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 36 [2020-07-21 10:44:36,343 WARN L193 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 20 [2020-07-21 10:44:36,352 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:44:36,353 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:44:36,353 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-21 10:44:36,353 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-21 10:44:36,353 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (and (or (not (= 0 (mod |base2flt_#in~m| 4294967296))) (and (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|))) (or (not (= 0 (mod |base2flt_#in~m| 4294967296))) (= 0 base2flt_~__retres4~0))) [2020-07-21 10:44:36,353 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-21 10:44:36,353 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-21 10:44:36,353 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-21 10:44:36,354 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (or (not (= 1 |base2flt_#in~m|)) (< (mod base2flt_~m 4294967296) 16777216)) (not (= 0 (mod |base2flt_#in~m| 4294967296))) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-21 10:44:36,354 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-21 10:44:36,354 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-21 10:44:36,354 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-21 10:44:36,354 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (= 0 (mod |base2flt_#in~m| 4294967296))) [2020-07-21 10:44:36,354 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-21 10:44:36,354 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= 16777216 (mod |base2flt_#in~m| 4294967296)) (<= |base2flt_#in~e| base2flt_~e)) [2020-07-21 10:44:36,355 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-21 10:44:36,355 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-21 10:44:36,355 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-21 10:44:36,355 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-21 10:44:36,355 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-21 10:44:36,355 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-21 10:44:36,355 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-21 10:44:36,355 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-21 10:44:36,356 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-21 10:44:36,356 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-21 10:44:36,356 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (= mulflt_~b |mulflt_#in~b|)) (.cse0 (exists ((v_mulflt_~a_6 Int)) (< (mod v_mulflt_~a_6 4294967296) (mod |mulflt_#in~b| 4294967296)))) (.cse2 (= 0 mulflt_~__retres10~1))) (or (and (not (= 0 (mod |mulflt_#in~a| 4294967296))) .cse0 (= mulflt_~b |mulflt_#in~a|)) (and (= mulflt_~a |mulflt_#in~a|) .cse1 (not (= (mod |mulflt_#in~b| 4294967296) 0)) (<= (mod |mulflt_#in~b| 4294967296) (mod |mulflt_#in~a| 4294967296))) (and .cse1 .cse2) (and .cse0 .cse2))) [2020-07-21 10:44:36,356 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-21 10:44:36,356 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:44:36,356 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:44:36,356 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:44:36,356 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:44:36,356 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-21 10:44:36,356 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-21 10:44:36,357 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-21 10:44:36,357 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-21 10:44:36,357 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-21 10:44:36,357 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-21 10:44:36,357 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-21 10:44:36,357 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-21 10:44:36,357 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-21 10:44:36,357 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 10:44:36,358 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-21 10:44:36,358 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-21 10:44:36,358 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-21 10:44:36,358 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-21 10:44:36,358 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-21 10:44:36,358 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0)) [2020-07-21 10:44:36,358 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-21 10:44:36,358 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (or (= 0 main_~zero~0) (= 0 main_~a~0)) [2020-07-21 10:44:36,359 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (<= (+ main_~sa~0 1) 0) (and (<= 1 main_~sa~0) (<= 1 main_~tmp~2)) (and .cse0 (= 0 main_~b~0)) (and (<= (mod main_~a~0 4294967296) 0) (or .cse0 (and (= 0 main_~a~0) (<= (mod main_~zero~0 4294967296) 0)))))) [2020-07-21 10:44:36,359 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-21 10:44:36,359 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 10:44:36,359 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-21 10:44:36,359 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-21 10:44:36,359 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-21 10:44:36,359 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 10:44:36,359 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-21 10:44:36,359 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-21 10:44:36,360 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-21 10:44:36,360 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 10:44:36,360 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-21 10:44:36,360 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-21 10:44:36,360 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-21 10:44:36,360 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-21 10:44:36,360 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 10:44:36,360 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-21 10:44:36,361 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-21 10:44:36,361 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-21 10:44:36,361 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-21 10:44:36,361 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-21 10:44:36,361 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-21 10:44:36,361 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-21 10:44:36,381 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:44:36,383 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:44:36,384 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:44:36,384 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:44:36,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:44:36 BoogieIcfgContainer [2020-07-21 10:44:36,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:44:36,390 INFO L168 Benchmark]: Toolchain (without parser) took 252418.72 ms. Allocated memory was 136.3 MB in the beginning and 325.6 MB in the end (delta: 189.3 MB). Free memory was 100.8 MB in the beginning and 96.2 MB in the end (delta: 4.6 MB). Peak memory consumption was 212.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:44:36,390 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:44:36,391 INFO L168 Benchmark]: CACSL2BoogieTranslator took 452.71 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 100.4 MB in the beginning and 178.0 MB in the end (delta: -77.7 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:44:36,392 INFO L168 Benchmark]: Boogie Preprocessor took 56.36 ms. Allocated memory is still 200.3 MB. Free memory was 178.0 MB in the beginning and 176.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:44:36,392 INFO L168 Benchmark]: RCFGBuilder took 616.80 ms. Allocated memory is still 200.3 MB. Free memory was 176.6 MB in the beginning and 150.8 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-07-21 10:44:36,393 INFO L168 Benchmark]: TraceAbstraction took 251286.45 ms. Allocated memory was 200.3 MB in the beginning and 325.6 MB in the end (delta: 125.3 MB). Free memory was 150.1 MB in the beginning and 96.2 MB in the end (delta: 53.9 MB). Peak memory consumption was 198.3 MB. Max. memory is 7.1 GB. [2020-07-21 10:44:36,395 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 452.71 ms. Allocated memory was 136.3 MB in the beginning and 200.3 MB in the end (delta: 64.0 MB). Free memory was 100.4 MB in the beginning and 178.0 MB in the end (delta: -77.7 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 56.36 ms. Allocated memory is still 200.3 MB. Free memory was 178.0 MB in the beginning and 176.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 616.80 ms. Allocated memory is still 200.3 MB. Free memory was 176.6 MB in the beginning and 150.8 MB in the end (delta: 25.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 251286.45 ms. Allocated memory was 200.3 MB in the beginning and 325.6 MB in the end (delta: 125.3 MB). Free memory was 150.1 MB in the beginning and 96.2 MB in the end (delta: 53.9 MB). Peak memory consumption was 198.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: !(0 == \old(m) % 4294967296) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (!(0 == \old(m) % 4294967296) || ((\old(e) <= e && m == \old(m)) && e <= \old(e))) && (!(0 == \old(m) % 4294967296) || 0 == __retres4) - InvariantResult [Line: 147]: Loop Invariant [2020-07-21 10:44:36,403 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:44:36,403 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:44:36,404 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:44:36,404 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] Derived loop invariant: ((((!(0 == \old(a) % 4294967296) && (\exists v_mulflt_~a_6 : int :: v_mulflt_~a_6 % 4294967296 < \old(b) % 4294967296)) && b == \old(a)) || (((a == \old(a) && b == \old(b)) && !(\old(b) % 4294967296 == 0)) && \old(b) % 4294967296 <= \old(a) % 4294967296)) || (b == \old(b) && 0 == __retres10)) || ((\exists v_mulflt_~a_6 : int :: v_mulflt_~a_6 % 4294967296 < \old(b) % 4294967296) && 0 == __retres10) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 16777216 <= \old(m) % 4294967296 && \old(e) <= e - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((!(1 == \old(m)) || m % 4294967296 < 16777216) && !(0 == \old(m) % 4294967296)) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 246.2s, OverallIterations: 23, TraceHistogramMax: 24, AutomataDifference: 230.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1491 SDtfs, 2243 SDslu, 7233 SDs, 0 SdLazy, 3012 SolverSat, 475 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 13.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2582 GetRequests, 2237 SyntacticMatches, 22 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 222.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 23 MinimizatonAttempts, 493 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 304 PreInvPairs, 1445 NumberOfFragments, 188 HoareAnnotationTreeSize, 304 FomulaSimplifications, 605155973 FormulaSimplificationTreeSizeReduction, 3.4s HoareSimplificationTime, 18 FomulaSimplificationsInter, 7924 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 1745 NumberOfCodeBlocks, 1745 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 2393 ConstructedInterpolants, 8 QuantifiedInterpolants, 548767 SizeOfPredicates, 51 NumberOfNonLiveVariables, 4602 ConjunctsInSsa, 274 ConjunctsInUnsatCore, 31 InterpolantComputations, 10 PerfectInterpolantSequences, 3408/6011 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...