/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_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:45:38,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:45:38,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:45:38,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:45:38,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:45:38,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:45:38,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:45:38,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:45:38,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:45:38,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:45:38,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:45:38,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:45:38,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:45:38,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:45:38,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:45:38,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:45:38,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:45:38,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:45:38,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:45:38,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:45:38,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:45:38,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:45:38,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:45:38,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:45:38,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 10:45:38,595 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 10:45:38,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 10:45:38,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 10:45:38,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 10:45:38,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 10:45:38,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 10:45:38,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 10:45:38,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 10:45:38,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 10:45:38,602 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 10:45:38,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 10:45:38,603 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 10:45:38,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 10:45:38,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:45:38,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:45:38,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:45:38,606 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 [2020-07-20 10:45:38,627 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:45:38,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:45:38,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:45:38,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:45:38,629 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:45:38,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:45:38,629 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:45:38,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:45:38,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:45:38,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:45:38,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:45:38,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:45:38,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:45:38,631 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:45:38,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:45:38,631 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:45:38,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:45:38,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:45:38,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:45:38,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:45:38,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:45:38,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:45:38,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:45:38,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:45:38,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:45:38,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:45:38,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:38,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:45:38,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:45:38,635 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 [2020-07-20 10:45:38,920 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:45:38,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:45:38,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:45:38,947 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:45:38,948 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:45:38,949 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-20 10:45:39,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46de740da/d1d908946fbc4115b6fe7c6056cdcc6c/FLAG84726bc32 [2020-07-20 10:45:39,515 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:45:39,515 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-20 10:45:39,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46de740da/d1d908946fbc4115b6fe7c6056cdcc6c/FLAG84726bc32 [2020-07-20 10:45:39,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46de740da/d1d908946fbc4115b6fe7c6056cdcc6c [2020-07-20 10:45:39,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:45:39,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:45:39,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:39,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:45:39,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:45:39,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:39" (1/1) ... [2020-07-20 10:45:39,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f2303c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:39, skipping insertion in model container [2020-07-20 10:45:39,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:45:39" (1/1) ... [2020-07-20 10:45:39,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:45:39,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:45:40,221 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:40,226 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:45:40,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:45:40,423 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:45:40,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40 WrapperNode [2020-07-20 10:45:40,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:45:40,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:45:40,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:45:40,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:45:40,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40" (1/1) ... [2020-07-20 10:45:40,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40" (1/1) ... [2020-07-20 10:45:40,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40" (1/1) ... [2020-07-20 10:45:40,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40" (1/1) ... [2020-07-20 10:45:40,455 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40" (1/1) ... [2020-07-20 10:45:40,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40" (1/1) ... [2020-07-20 10:45:40,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40" (1/1) ... [2020-07-20 10:45:40,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:45:40,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:45:40,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:45:40,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:45:40,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40" (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 [2020-07-20 10:45:40,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:45:40,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:45:40,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 10:45:40,539 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-20 10:45:40,540 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-20 10:45:40,540 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-20 10:45:40,540 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:45:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:45:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 10:45:40,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-20 10:45:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 10:45:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-20 10:45:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-20 10:45:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-20 10:45:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:45:40,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:45:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:45:40,975 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:45:40,975 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 10:45:40,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:40 BoogieIcfgContainer [2020-07-20 10:45:40,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:45:40,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:45:40,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:45:40,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:45:40,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:45:39" (1/3) ... [2020-07-20 10:45:40,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99c21d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:40, skipping insertion in model container [2020-07-20 10:45:40,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:45:40" (2/3) ... [2020-07-20 10:45:40,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99c21d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:45:40, skipping insertion in model container [2020-07-20 10:45:40,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:45:40" (3/3) ... [2020-07-20 10:45:40,989 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-20 10:45:41,000 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:45:41,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:45:41,022 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:45:41,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:45:41,046 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:45:41,046 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:45:41,046 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:45:41,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:45:41,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:45:41,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:45:41,047 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:45:41,067 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-20 10:45:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 10:45:41,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:41,078 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] [2020-07-20 10:45:41,078 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:41,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-20 10:45:41,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:41,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726921810] [2020-07-20 10:45:41,091 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 [2020-07-20 10:45:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 10:45:41,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 10:45:41,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:41,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726921810] [2020-07-20 10:45:41,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:41,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 10:45:41,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759827447] [2020-07-20 10:45:41,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 10:45:41,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 10:45:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 10:45:41,308 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-07-20 10:45:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:41,362 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2020-07-20 10:45:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 10:45:41,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-20 10:45:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:41,375 INFO L225 Difference]: With dead ends: 118 [2020-07-20 10:45:41,376 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 10:45:41,380 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 [2020-07-20 10:45:41,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 10:45:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-20 10:45:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 10:45:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-07-20 10:45:41,427 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2020-07-20 10:45:41,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:41,430 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-07-20 10:45:41,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 10:45:41,430 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-07-20 10:45:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 10:45:41,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:41,434 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] [2020-07-20 10:45:41,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:41,649 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:41,650 INFO L82 PathProgramCache]: Analyzing trace with hash -880454641, now seen corresponding path program 1 times [2020-07-20 10:45:41,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:41,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417609266] [2020-07-20 10:45:41,652 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 [2020-07-20 10:45:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:41,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 10:45:41,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 10:45:41,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:41,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417609266] [2020-07-20 10:45:41,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:41,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:41,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626018766] [2020-07-20 10:45:41,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:41,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:41,786 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 4 states. [2020-07-20 10:45:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:41,824 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-07-20 10:45:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 10:45:41,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-07-20 10:45:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:41,827 INFO L225 Difference]: With dead ends: 64 [2020-07-20 10:45:41,827 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 10:45:41,829 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 [2020-07-20 10:45:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 10:45:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-20 10:45:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 10:45:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2020-07-20 10:45:41,839 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 50 [2020-07-20 10:45:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:41,840 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2020-07-20 10:45:41,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2020-07-20 10:45:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 10:45:41,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:41,843 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] [2020-07-20 10:45:42,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:42,057 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1901522995, now seen corresponding path program 1 times [2020-07-20 10:45:42,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:42,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237976521] [2020-07-20 10:45:42,059 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 [2020-07-20 10:45:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:42,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 10:45:42,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:42,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:42,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237976521] [2020-07-20 10:45:42,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:42,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 10:45:42,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292410393] [2020-07-20 10:45:42,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:45:42,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:42,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:45:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:45:42,245 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2020-07-20 10:45:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:42,418 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2020-07-20 10:45:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:45:42,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-07-20 10:45:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:42,423 INFO L225 Difference]: With dead ends: 89 [2020-07-20 10:45:42,423 INFO L226 Difference]: Without dead ends: 79 [2020-07-20 10:45:42,424 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 [2020-07-20 10:45:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-20 10:45:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-07-20 10:45:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 10:45:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-07-20 10:45:42,439 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 50 [2020-07-20 10:45:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:42,440 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-07-20 10:45:42,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:45:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-07-20 10:45:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 10:45:42,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:42,443 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] [2020-07-20 10:45:42,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:42,658 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:42,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:42,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1643357557, now seen corresponding path program 1 times [2020-07-20 10:45:42,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:42,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357696749] [2020-07-20 10:45:42,661 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 [2020-07-20 10:45:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:42,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 10:45:42,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:42,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:42,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357696749] [2020-07-20 10:45:42,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:42,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-20 10:45:42,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111581611] [2020-07-20 10:45:42,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 10:45:42,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:42,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 10:45:42,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-20 10:45:42,785 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 7 states. [2020-07-20 10:45:42,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:42,864 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2020-07-20 10:45:42,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:45:42,865 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-07-20 10:45:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:42,867 INFO L225 Difference]: With dead ends: 75 [2020-07-20 10:45:42,867 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 10:45:42,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 10:45:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 10:45:42,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-07-20 10:45:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 10:45:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2020-07-20 10:45:42,878 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 50 [2020-07-20 10:45:42,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:42,879 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2020-07-20 10:45:42,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 10:45:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2020-07-20 10:45:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 10:45:42,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:42,882 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] [2020-07-20 10:45:43,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,095 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:43,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1046629615, now seen corresponding path program 1 times [2020-07-20 10:45:43,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:43,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164367076] [2020-07-20 10:45:43,098 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 [2020-07-20 10:45:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:45:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 10:45:43,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:43,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164367076] [2020-07-20 10:45:43,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:43,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:45:43,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689021785] [2020-07-20 10:45:43,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:45:43,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:45:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:45:43,193 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand 6 states. [2020-07-20 10:45:43,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:43,234 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-07-20 10:45:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:45:43,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-20 10:45:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:43,236 INFO L225 Difference]: With dead ends: 73 [2020-07-20 10:45:43,236 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 10:45:43,237 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 [2020-07-20 10:45:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 10:45:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-20 10:45:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 10:45:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-20 10:45:43,247 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 52 [2020-07-20 10:45:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:43,248 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-20 10:45:43,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:45:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-20 10:45:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 10:45:43,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:43,250 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] [2020-07-20 10:45:43,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,464 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:43,465 INFO L82 PathProgramCache]: Analyzing trace with hash 989371313, now seen corresponding path program 1 times [2020-07-20 10:45:43,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:43,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190502781] [2020-07-20 10:45:43,466 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 [2020-07-20 10:45:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:43,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 10:45:43,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-20 10:45:43,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:43,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190502781] [2020-07-20 10:45:43,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:43,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 10:45:43,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538172099] [2020-07-20 10:45:43,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 10:45:43,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:43,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 10:45:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:45:43,583 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 6 states. [2020-07-20 10:45:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:43,638 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2020-07-20 10:45:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:45:43,639 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-20 10:45:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:43,640 INFO L225 Difference]: With dead ends: 81 [2020-07-20 10:45:43,640 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 10:45:43,641 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 [2020-07-20 10:45:43,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 10:45:43,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-07-20 10:45:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 10:45:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2020-07-20 10:45:43,649 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 52 [2020-07-20 10:45:43,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:43,650 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2020-07-20 10:45:43,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 10:45:43,650 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2020-07-20 10:45:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 10:45:43,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:43,652 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] [2020-07-20 10:45:43,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:43,866 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:43,867 INFO L82 PathProgramCache]: Analyzing trace with hash -823640004, now seen corresponding path program 1 times [2020-07-20 10:45:43,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:43,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722893492] [2020-07-20 10:45:43,869 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 [2020-07-20 10:45:43,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:43,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:45:43,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 10:45:44,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:44,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722893492] [2020-07-20 10:45:44,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:45:44,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-20 10:45:44,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074169033] [2020-07-20 10:45:44,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 10:45:44,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:44,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 10:45:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:45:44,066 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 10 states. [2020-07-20 10:45:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:44,212 INFO L93 Difference]: Finished difference Result 117 states and 156 transitions. [2020-07-20 10:45:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 10:45:44,213 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-07-20 10:45:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:44,215 INFO L225 Difference]: With dead ends: 117 [2020-07-20 10:45:44,215 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 10:45:44,216 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 [2020-07-20 10:45:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 10:45:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-07-20 10:45:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 10:45:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2020-07-20 10:45:44,231 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 54 [2020-07-20 10:45:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:44,231 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2020-07-20 10:45:44,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 10:45:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2020-07-20 10:45:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 10:45:44,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:44,233 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] [2020-07-20 10:45:44,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:44,447 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:44,448 INFO L82 PathProgramCache]: Analyzing trace with hash -165486742, now seen corresponding path program 1 times [2020-07-20 10:45:44,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:44,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326925947] [2020-07-20 10:45:44,449 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 [2020-07-20 10:45:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:45:44,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:44,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:44,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326925947] [2020-07-20 10:45:44,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:44,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 10:45:44,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872278960] [2020-07-20 10:45:44,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 10:45:44,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:44,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 10:45:44,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-20 10:45:44,801 INFO L87 Difference]: Start difference. First operand 78 states and 107 transitions. Second operand 15 states. [2020-07-20 10:45:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:45,075 INFO L93 Difference]: Finished difference Result 131 states and 178 transitions. [2020-07-20 10:45:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:45:45,076 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-07-20 10:45:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:45,078 INFO L225 Difference]: With dead ends: 131 [2020-07-20 10:45:45,078 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 10:45:45,080 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 [2020-07-20 10:45:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 10:45:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2020-07-20 10:45:45,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 10:45:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2020-07-20 10:45:45,093 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 57 [2020-07-20 10:45:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:45,093 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2020-07-20 10:45:45,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 10:45:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2020-07-20 10:45:45,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 10:45:45,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:45,095 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] [2020-07-20 10:45:45,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:45,297 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash -777472083, now seen corresponding path program 2 times [2020-07-20 10:45:45,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:45,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589912108] [2020-07-20 10:45:45,299 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 [2020-07-20 10:45:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:45,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 10:45:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 10:45:45,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:45,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589912108] [2020-07-20 10:45:45,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:45,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:45,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701702275] [2020-07-20 10:45:45,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:45,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:45,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:45,390 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand 4 states. [2020-07-20 10:45:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:45,448 INFO L93 Difference]: Finished difference Result 178 states and 249 transitions. [2020-07-20 10:45:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 10:45:45,450 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-07-20 10:45:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:45,451 INFO L225 Difference]: With dead ends: 178 [2020-07-20 10:45:45,452 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 10:45:45,453 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 [2020-07-20 10:45:45,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 10:45:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-07-20 10:45:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 10:45:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2020-07-20 10:45:45,465 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 58 [2020-07-20 10:45:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:45,465 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2020-07-20 10:45:45,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2020-07-20 10:45:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 10:45:45,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:45,467 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] [2020-07-20 10:45:45,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:45,682 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:45,683 INFO L82 PathProgramCache]: Analyzing trace with hash 102424817, now seen corresponding path program 1 times [2020-07-20 10:45:45,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:45,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581021440] [2020-07-20 10:45:45,684 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 [2020-07-20 10:45:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 10:45:45,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 10:45:45,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:45,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581021440] [2020-07-20 10:45:45,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:45,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:45,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383372486] [2020-07-20 10:45:45,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:45,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:45,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:45,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:45,752 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand 4 states. [2020-07-20 10:45:45,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:45,843 INFO L93 Difference]: Finished difference Result 190 states and 267 transitions. [2020-07-20 10:45:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:45:45,847 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-07-20 10:45:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:45,849 INFO L225 Difference]: With dead ends: 190 [2020-07-20 10:45:45,849 INFO L226 Difference]: Without dead ends: 104 [2020-07-20 10:45:45,850 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 [2020-07-20 10:45:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-20 10:45:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2020-07-20 10:45:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-20 10:45:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 124 transitions. [2020-07-20 10:45:45,862 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 124 transitions. Word has length 58 [2020-07-20 10:45:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:45,862 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 124 transitions. [2020-07-20 10:45:45,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 124 transitions. [2020-07-20 10:45:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 10:45:45,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:45,864 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] [2020-07-20 10:45:46,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:46,070 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:46,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:46,071 INFO L82 PathProgramCache]: Analyzing trace with hash 500214288, now seen corresponding path program 1 times [2020-07-20 10:45:46,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:46,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725095975] [2020-07-20 10:45:46,072 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 [2020-07-20 10:45:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:46,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 10:45:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 10:45:46,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:46,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725095975] [2020-07-20 10:45:46,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:46,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:46,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208329831] [2020-07-20 10:45:46,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:46,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:46,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:46,134 INFO L87 Difference]: Start difference. First operand 92 states and 124 transitions. Second operand 4 states. [2020-07-20 10:45:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:46,201 INFO L93 Difference]: Finished difference Result 171 states and 222 transitions. [2020-07-20 10:45:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:45:46,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-07-20 10:45:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:46,203 INFO L225 Difference]: With dead ends: 171 [2020-07-20 10:45:46,203 INFO L226 Difference]: Without dead ends: 79 [2020-07-20 10:45:46,204 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 [2020-07-20 10:45:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-20 10:45:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2020-07-20 10:45:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 10:45:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-07-20 10:45:46,214 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2020-07-20 10:45:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:46,215 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-07-20 10:45:46,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-07-20 10:45:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-20 10:45:46,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:46,216 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] [2020-07-20 10:45:46,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:46,424 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:46,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash -450159748, now seen corresponding path program 1 times [2020-07-20 10:45:46,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:46,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715380269] [2020-07-20 10:45:46,426 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 [2020-07-20 10:45:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:46,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 10:45:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:46,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:46,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715380269] [2020-07-20 10:45:46,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:46,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 10:45:46,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042029768] [2020-07-20 10:45:46,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 10:45:46,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:46,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 10:45:46,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 10:45:46,492 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 4 states. [2020-07-20 10:45:46,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:46,544 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2020-07-20 10:45:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 10:45:46,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-07-20 10:45:46,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:46,545 INFO L225 Difference]: With dead ends: 129 [2020-07-20 10:45:46,545 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 10:45:46,546 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 [2020-07-20 10:45:46,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 10:45:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 10:45:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 10:45:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-07-20 10:45:46,562 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 64 [2020-07-20 10:45:46,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:46,562 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-07-20 10:45:46,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 10:45:46,562 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-07-20 10:45:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-20 10:45:46,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:46,570 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] [2020-07-20 10:45:46,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:46,784 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:46,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:46,784 INFO L82 PathProgramCache]: Analyzing trace with hash -762078403, now seen corresponding path program 1 times [2020-07-20 10:45:46,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:46,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286298877] [2020-07-20 10:45:46,785 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 [2020-07-20 10:45:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:46,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:45:46,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:46,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:45:46,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286298877] [2020-07-20 10:45:46,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:45:46,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 10:45:46,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881481742] [2020-07-20 10:45:46,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 10:45:46,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 10:45:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:45:46,868 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 5 states. [2020-07-20 10:45:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:47,004 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2020-07-20 10:45:47,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:45:47,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-07-20 10:45:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:47,006 INFO L225 Difference]: With dead ends: 145 [2020-07-20 10:45:47,006 INFO L226 Difference]: Without dead ends: 86 [2020-07-20 10:45:47,007 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 [2020-07-20 10:45:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-20 10:45:47,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2020-07-20 10:45:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 10:45:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-07-20 10:45:47,017 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 66 [2020-07-20 10:45:47,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:47,019 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-07-20 10:45:47,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 10:45:47,019 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-07-20 10:45:47,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 10:45:47,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:47,020 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] [2020-07-20 10:45:47,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:47,221 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:47,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:47,222 INFO L82 PathProgramCache]: Analyzing trace with hash 30284491, now seen corresponding path program 1 times [2020-07-20 10:45:47,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:47,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122280314] [2020-07-20 10:45:47,223 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 [2020-07-20 10:45:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:45:47,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:47,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:47,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122280314] [2020-07-20 10:45:47,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:47,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-20 10:45:47,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499677987] [2020-07-20 10:45:47,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:45:47,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:47,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:45:47,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-20 10:45:47,369 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 8 states. [2020-07-20 10:45:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:47,434 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2020-07-20 10:45:47,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:45:47,437 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-07-20 10:45:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:47,438 INFO L225 Difference]: With dead ends: 156 [2020-07-20 10:45:47,438 INFO L226 Difference]: Without dead ends: 90 [2020-07-20 10:45:47,440 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 [2020-07-20 10:45:47,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-20 10:45:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-07-20 10:45:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-20 10:45:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-07-20 10:45:47,452 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 67 [2020-07-20 10:45:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:47,452 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-07-20 10:45:47,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:45:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-07-20 10:45:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-20 10:45:47,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:47,453 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] [2020-07-20 10:45:47,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:47,668 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:47,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1383334604, now seen corresponding path program 1 times [2020-07-20 10:45:47,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:47,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813130540] [2020-07-20 10:45:47,670 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 [2020-07-20 10:45:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:47,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 10:45:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:47,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:47,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813130540] [2020-07-20 10:45:47,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:47,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 10:45:47,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444266269] [2020-07-20 10:45:47,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 10:45:47,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:47,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 10:45:47,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 10:45:47,895 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 10 states. [2020-07-20 10:45:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:48,270 INFO L93 Difference]: Finished difference Result 189 states and 233 transitions. [2020-07-20 10:45:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 10:45:48,273 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-20 10:45:48,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:48,274 INFO L225 Difference]: With dead ends: 189 [2020-07-20 10:45:48,274 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 10:45:48,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2020-07-20 10:45:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 10:45:48,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2020-07-20 10:45:48,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-20 10:45:48,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2020-07-20 10:45:48,296 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 69 [2020-07-20 10:45:48,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:48,296 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2020-07-20 10:45:48,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 10:45:48,296 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2020-07-20 10:45:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-20 10:45:48,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:48,298 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] [2020-07-20 10:45:48,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:48,514 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:48,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:48,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1160017596, now seen corresponding path program 2 times [2020-07-20 10:45:48,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:48,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074840000] [2020-07-20 10:45:48,515 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 [2020-07-20 10:45:48,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:48,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 10:45:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:48,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:48,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074840000] [2020-07-20 10:45:48,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:48,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-20 10:45:48,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645980073] [2020-07-20 10:45:48,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 10:45:48,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:48,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 10:45:48,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-20 10:45:48,814 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand 14 states. [2020-07-20 10:45:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:45:48,919 INFO L93 Difference]: Finished difference Result 212 states and 269 transitions. [2020-07-20 10:45:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 10:45:48,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-07-20 10:45:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:45:48,922 INFO L225 Difference]: With dead ends: 212 [2020-07-20 10:45:48,922 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 10:45:48,924 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 [2020-07-20 10:45:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 10:45:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 98. [2020-07-20 10:45:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 10:45:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-20 10:45:48,943 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 76 [2020-07-20 10:45:48,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:45:48,943 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-20 10:45:48,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 10:45:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-20 10:45:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-20 10:45:48,945 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:45:48,945 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] [2020-07-20 10:45:49,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:45:49,158 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:45:49,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:45:49,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1135497332, now seen corresponding path program 2 times [2020-07-20 10:45:49,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:45:49,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117839608] [2020-07-20 10:45:49,160 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 [2020-07-20 10:45:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:45:49,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:45:49,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:45:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:45:49,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:45:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:45:49,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117839608] [2020-07-20 10:45:49,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:45:49,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-20 10:45:49,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963492813] [2020-07-20 10:45:49,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 10:45:49,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:45:49,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 10:45:49,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-07-20 10:45:49,590 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 18 states. [2020-07-20 10:45:58,335 WARN L193 SmtUtils]: Spent 8.33 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 10:46:25,291 WARN L193 SmtUtils]: Spent 22.75 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 10:46:37,900 WARN L193 SmtUtils]: Spent 10.38 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 10:46:48,349 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 10:47:00,922 WARN L193 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 10:47:09,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:09,588 INFO L93 Difference]: Finished difference Result 223 states and 277 transitions. [2020-07-20 10:47:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 10:47:09,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-07-20 10:47:09,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:09,590 INFO L225 Difference]: With dead ends: 223 [2020-07-20 10:47:09,590 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 10:47:09,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 79.6s TimeCoverageRelationStatistics Valid=314, Invalid=603, Unknown=13, NotChecked=0, Total=930 [2020-07-20 10:47:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 10:47:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 108. [2020-07-20 10:47:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-20 10:47:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2020-07-20 10:47:09,602 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 81 [2020-07-20 10:47:09,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:09,602 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2020-07-20 10:47:09,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 10:47:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2020-07-20 10:47:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-20 10:47:09,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:09,604 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] [2020-07-20 10:47:09,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:09,805 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:09,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:09,806 INFO L82 PathProgramCache]: Analyzing trace with hash -18637924, now seen corresponding path program 3 times [2020-07-20 10:47:09,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:09,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072433450] [2020-07-20 10:47:09,807 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 [2020-07-20 10:47:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:09,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 10:47:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 26 proven. 155 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:47:10,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 165 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:47:10,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072433450] [2020-07-20 10:47:10,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:10,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-20 10:47:10,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244481030] [2020-07-20 10:47:10,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 10:47:10,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:10,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 10:47:10,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-20 10:47:10,526 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand 26 states. [2020-07-20 10:47:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:10,741 INFO L93 Difference]: Finished difference Result 320 states and 421 transitions. [2020-07-20 10:47:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-20 10:47:10,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-07-20 10:47:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:10,744 INFO L225 Difference]: With dead ends: 320 [2020-07-20 10:47:10,745 INFO L226 Difference]: Without dead ends: 218 [2020-07-20 10:47:10,746 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 [2020-07-20 10:47:10,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-20 10:47:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 134. [2020-07-20 10:47:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 10:47:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 168 transitions. [2020-07-20 10:47:10,767 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 168 transitions. Word has length 94 [2020-07-20 10:47:10,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:10,767 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 168 transitions. [2020-07-20 10:47:10,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 10:47:10,767 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 168 transitions. [2020-07-20 10:47:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-20 10:47:10,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:10,770 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] [2020-07-20 10:47:10,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:10,984 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:10,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:10,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1473926900, now seen corresponding path program 3 times [2020-07-20 10:47:10,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:10,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533004652] [2020-07-20 10:47:10,985 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 [2020-07-20 10:47:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:11,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-20 10:47:11,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 27 proven. 273 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:47:11,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:12,326 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 4 proven. 284 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:47:12,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533004652] [2020-07-20 10:47:12,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:12,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-20 10:47:12,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668402536] [2020-07-20 10:47:12,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 10:47:12,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:12,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 10:47:12,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 10:47:12,329 INFO L87 Difference]: Start difference. First operand 134 states and 168 transitions. Second operand 34 states. [2020-07-20 10:47:43,628 WARN L193 SmtUtils]: Spent 19.37 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-20 10:48:00,917 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-20 10:48:12,492 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-20 10:48:40,050 WARN L193 SmtUtils]: Spent 8.42 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-20 10:49:04,093 WARN L193 SmtUtils]: Spent 7.00 s on a formula simplification. DAG size of input: 35 DAG size of output: 17 [2020-07-20 10:49:29,519 WARN L193 SmtUtils]: Spent 8.38 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-20 10:49:48,838 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-20 10:50:04,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:04,058 INFO L93 Difference]: Finished difference Result 291 states and 365 transitions. [2020-07-20 10:50:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-20 10:50:04,061 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 105 [2020-07-20 10:50:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:04,063 INFO L225 Difference]: With dead ends: 291 [2020-07-20 10:50:04,063 INFO L226 Difference]: Without dead ends: 169 [2020-07-20 10:50:04,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 158.8s TimeCoverageRelationStatistics Valid=913, Invalid=2232, Unknown=47, NotChecked=0, Total=3192 [2020-07-20 10:50:04,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-20 10:50:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2020-07-20 10:50:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 10:50:04,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 175 transitions. [2020-07-20 10:50:04,081 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 175 transitions. Word has length 105 [2020-07-20 10:50:04,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:04,081 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 175 transitions. [2020-07-20 10:50:04,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 10:50:04,082 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2020-07-20 10:50:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-20 10:50:04,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:04,083 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] [2020-07-20 10:50:04,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:04,297 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash 613252444, now seen corresponding path program 4 times [2020-07-20 10:50:04,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:04,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898467201] [2020-07-20 10:50:04,298 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 [2020-07-20 10:50:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:04,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 10:50:04,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 26 proven. 737 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-20 10:50:04,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 4 proven. 747 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 10:50:06,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898467201] [2020-07-20 10:50:06,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:50:06,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-20 10:50:06,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377101801] [2020-07-20 10:50:06,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 10:50:06,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:06,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 10:50:06,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-20 10:50:06,772 INFO L87 Difference]: Start difference. First operand 138 states and 175 transitions. Second operand 50 states. [2020-07-20 10:50:07,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:07,314 INFO L93 Difference]: Finished difference Result 518 states and 701 transitions. [2020-07-20 10:50:07,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-20 10:50:07,315 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 130 [2020-07-20 10:50:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:07,319 INFO L225 Difference]: With dead ends: 518 [2020-07-20 10:50:07,320 INFO L226 Difference]: Without dead ends: 386 [2020-07-20 10:50:07,322 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 [2020-07-20 10:50:07,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-20 10:50:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 206. [2020-07-20 10:50:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 10:50:07,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2020-07-20 10:50:07,362 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 130 [2020-07-20 10:50:07,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:07,362 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2020-07-20 10:50:07,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 10:50:07,362 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2020-07-20 10:50:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 10:50:07,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:07,364 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] [2020-07-20 10:50:07,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:07,581 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:07,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:07,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 4 times [2020-07-20 10:50:07,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:07,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347016819] [2020-07-20 10:50:07,582 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 [2020-07-20 10:50:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:07,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 10:50:07,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:09,065 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_mulflt_~b_46 Int)) (< (mod |c_mulflt_#in~a| 4294967296) (mod v_mulflt_~b_46 4294967296))) is different from true [2020-07-20 10:50:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 10:50:09,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:10,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347016819] [2020-07-20 10:50:10,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:50:10,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-20 10:50:10,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290962295] [2020-07-20 10:50:10,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 10:50:10,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:10,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 10:50:10,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2020-07-20 10:50:10,307 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand 8 states. [2020-07-20 10:50:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:10,427 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2020-07-20 10:50:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:50:10,428 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-07-20 10:50:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:10,431 INFO L225 Difference]: With dead ends: 242 [2020-07-20 10:50:10,432 INFO L226 Difference]: Without dead ends: 232 [2020-07-20 10:50:10,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=20, Invalid=55, Unknown=1, NotChecked=14, Total=90 [2020-07-20 10:50:10,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-20 10:50:10,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 218. [2020-07-20 10:50:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-20 10:50:10,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 280 transitions. [2020-07-20 10:50:10,452 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 280 transitions. Word has length 135 [2020-07-20 10:50:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:10,453 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 280 transitions. [2020-07-20 10:50:10,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 10:50:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 280 transitions. [2020-07-20 10:50:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-20 10:50:10,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:10,455 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] [2020-07-20 10:50:10,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:10,671 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:10,672 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-07-20 10:50:10,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:10,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211898698] [2020-07-20 10:50:10,673 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 [2020-07-20 10:50:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:10,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 10:50:10,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-20 10:50:10,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:11,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211898698] [2020-07-20 10:50:11,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 10:50:11,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-20 10:50:11,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922263186] [2020-07-20 10:50:11,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 10:50:11,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:11,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 10:50:11,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-20 10:50:11,105 INFO L87 Difference]: Start difference. First operand 218 states and 280 transitions. Second operand 9 states. [2020-07-20 10:50:11,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:11,242 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2020-07-20 10:50:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 10:50:11,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-07-20 10:50:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:11,243 INFO L225 Difference]: With dead ends: 226 [2020-07-20 10:50:11,243 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 10:50:11,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 142 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2020-07-20 10:50:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 10:50:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 10:50:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 10:50:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 10:50:11,246 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-20 10:50:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:11,246 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 10:50:11,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 10:50:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 10:50:11,247 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 10:50:11,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:11,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 10:50:12,170 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 11 [2020-07-20 10:50:12,416 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-20 10:50:12,638 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-20 10:50:12,820 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-20 10:50:13,477 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 1026 DAG size of output: 890 [2020-07-20 10:50:13,680 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 449 [2020-07-20 10:50:13,951 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 2246 DAG size of output: 20 [2020-07-20 10:50:14,207 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 599 [2020-07-20 10:50:14,596 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 2255 DAG size of output: 35 [2020-07-20 10:50:14,787 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 2255 DAG size of output: 35 [2020-07-20 10:50:18,127 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 116 DAG size of output: 26 [2020-07-20 10:50:19,009 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 915 DAG size of output: 20 [2020-07-20 10:50:19,017 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 10:50:19,017 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:50:19,017 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-20 10:50:19,017 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-20 10:50:19,017 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (and (or (= 0 base2flt_~__retres4~0) (not (= 0 (mod |base2flt_#in~m| 4294967296)))) (or (not (= 0 (mod |base2flt_#in~m| 4294967296))) (and (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|)))) [2020-07-20 10:50:19,017 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-20 10:50:19,018 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-20 10:50:19,018 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-20 10:50:19,018 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (not (= (mod |base2flt_#in~m| 4294967296) 0)) (or (< (mod base2flt_~m 4294967296) 16777216) (not (= 1 |base2flt_#in~m|))) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-20 10:50:19,018 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-20 10:50:19,018 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-20 10:50:19,018 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-20 10:50:19,018 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (= 0 (mod |base2flt_#in~m| 4294967296))) [2020-07-20 10:50:19,018 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-20 10:50:19,018 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (<= 16777216 (mod |base2flt_#in~m| 4294967296))) [2020-07-20 10:50:19,018 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-20 10:50:19,019 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-20 10:50:19,019 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-20 10:50:19,019 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-20 10:50:19,019 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-20 10:50:19,019 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-20 10:50:19,019 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-20 10:50:19,019 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-20 10:50:19,019 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-20 10:50:19,020 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-20 10:50:19,020 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse1 (= 0 mulflt_~__retres10~1)) (.cse0 (exists ((v_mulflt_~a_6 Int)) (< (mod v_mulflt_~a_6 4294967296) (mod |mulflt_#in~b| 4294967296)))) (.cse2 (not (= 0 (mod |mulflt_#in~a| 4294967296))))) (or (and .cse0 .cse1) (and .cse0 (= mulflt_~b |mulflt_#in~a|) .cse2) (and (= mulflt_~b |mulflt_#in~b|) .cse1) (and .cse0 (= mulflt_~a |mulflt_#in~a|) .cse2))) [2020-07-20 10:50:19,020 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-20 10:50:19,020 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 10:50:19,020 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 10:50:19,020 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 10:50:19,020 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-20 10:50:19,021 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 10:50:19,021 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-20 10:50:19,022 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-20 10:50:19,022 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-20 10:50:19,022 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-20 10:50:19,022 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-20 10:50:19,022 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)) [2020-07-20 10:50:19,022 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-20 10:50:19,022 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 10:50:19,023 INFO L264 CegarLoopResult]: At program point L233-2(lines 233 242) the Hoare annotation is: (let ((.cse0 (= 0 main_~zero~0))) (or (and .cse0 (= 0 main_~a~0)) (and (= 0 main_~b~0) (<= (mod main_~zero~0 4294967296) 0)) (and (<= 1 main_~tmp~2) (<= 1 main_~sb~0)) (<= (+ main_~sb~0 1) 0) (and .cse0 (<= (mod main_~b~0 4294967296) 0)))) [2020-07-20 10:50:19,023 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-20 10:50:19,023 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-20 10:50:19,023 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-20 10:50:19,023 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-20 10:50:19,023 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-20 10:50:19,023 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-20 10:50:19,023 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-20 10:50:19,023 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-20 10:50:19,023 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-20 10:50:19,024 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-20 10:50:19,025 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-20 10:50:19,025 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-20 10:50:19,025 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-20 10:50:19,040 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,042 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,042 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,043 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,043 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,043 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:50:19 BoogieIcfgContainer [2020-07-20 10:50:19,048 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 10:50:19,050 INFO L168 Benchmark]: Toolchain (without parser) took 279183.92 ms. Allocated memory was 136.8 MB in the beginning and 365.4 MB in the end (delta: 228.6 MB). Free memory was 101.9 MB in the beginning and 306.2 MB in the end (delta: -204.3 MB). Peak memory consumption was 230.4 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:19,051 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 10:50:19,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 556.49 ms. Allocated memory was 136.8 MB in the beginning and 203.9 MB in the end (delta: 67.1 MB). Free memory was 101.4 MB in the beginning and 182.4 MB in the end (delta: -80.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:19,060 INFO L168 Benchmark]: Boogie Preprocessor took 43.36 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:19,060 INFO L168 Benchmark]: RCFGBuilder took 511.59 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 155.1 MB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:19,061 INFO L168 Benchmark]: TraceAbstraction took 278066.58 ms. Allocated memory was 203.9 MB in the beginning and 365.4 MB in the end (delta: 161.5 MB). Free memory was 155.1 MB in the beginning and 306.2 MB in the end (delta: -151.1 MB). Peak memory consumption was 216.5 MB. Max. memory is 7.1 GB. [2020-07-20 10:50:19,063 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 556.49 ms. Allocated memory was 136.8 MB in the beginning and 203.9 MB in the end (delta: 67.1 MB). Free memory was 101.4 MB in the beginning and 182.4 MB in the end (delta: -80.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.36 ms. Allocated memory is still 203.9 MB. Free memory was 182.4 MB in the beginning and 180.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 511.59 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 155.1 MB in the end (delta: 25.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278066.58 ms. Allocated memory was 203.9 MB in the beginning and 365.4 MB in the end (delta: 161.5 MB). Free memory was 155.1 MB in the beginning and 306.2 MB in the end (delta: -151.1 MB). Peak memory consumption was 216.5 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] - 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 == __retres4 || !(0 == \old(m) % 4294967296)) && (!(0 == \old(m) % 4294967296) || ((\old(e) <= e && m == \old(m)) && e <= \old(e))) - InvariantResult [Line: 147]: Loop Invariant [2020-07-20 10:50:19,069 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,070 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,070 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,070 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,071 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-20 10:50:19,071 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] Derived loop invariant: ((((\exists v_mulflt_~a_6 : int :: v_mulflt_~a_6 % 4294967296 < \old(b) % 4294967296) && 0 == __retres10) || (((\exists v_mulflt_~a_6 : int :: v_mulflt_~a_6 % 4294967296 < \old(b) % 4294967296) && b == \old(a)) && !(0 == \old(a) % 4294967296))) || (b == \old(b) && 0 == __retres10)) || (((\exists v_mulflt_~a_6 : int :: v_mulflt_~a_6 % 4294967296 < \old(b) % 4294967296) && a == \old(a)) && !(0 == \old(a) % 4294967296)) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: \old(e) <= e && 16777216 <= \old(m) % 4294967296 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (!(\old(m) % 4294967296 == 0) && (m % 4294967296 < 16777216 || !(1 == \old(m)))) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 270.4s, OverallIterations: 22, TraceHistogramMax: 24, AutomataDifference: 254.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1460 SDtfs, 2259 SDslu, 6786 SDs, 0 SdLazy, 2861 SolverSat, 474 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 15.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2387 GetRequests, 2085 SyntacticMatches, 15 SemanticMatches, 287 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 245.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=218occurred in iteration=21, 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, 22 MinimizatonAttempts, 495 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 314 PreInvPairs, 1541 NumberOfFragments, 181 HoareAnnotationTreeSize, 314 FomulaSimplifications, 803893387 FormulaSimplificationTreeSizeReduction, 3.8s HoareSimplificationTime, 18 FomulaSimplificationsInter, 13616 FormulaSimplificationTreeSizeReductionInter, 3.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 1610 NumberOfCodeBlocks, 1610 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 2259 ConstructedInterpolants, 9 QuantifiedInterpolants, 508081 SizeOfPredicates, 40 NumberOfNonLiveVariables, 4298 ConjunctsInSsa, 239 ConjunctsInUnsatCore, 30 InterpolantComputations, 11 PerfectInterpolantSequences, 2563/5145 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...