/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 [2020-07-21 10:40:22,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:22,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:22,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:22,919 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:22,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:22,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:22,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:22,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:22,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:22,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:22,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:22,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:22,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:22,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:22,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:22,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:22,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:22,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:22,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:22,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:22,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:22,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:22,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:22,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 10:40:22,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 10:40:22,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 10:40:22,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 10:40:22,946 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 10:40:22,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 10:40:22,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 10:40:22,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 10:40:22,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 10:40:22,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 10:40:22,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 10:40:22,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 10:40:22,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 10:40:22,952 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 10:40:22,952 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:22,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:22,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:22,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:40:22,968 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:22,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:22,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:22,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:22,970 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:22,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:22,971 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:22,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:22,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:22,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:22,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:22,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:22,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:22,972 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:22,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:22,972 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:22,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:22,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:22,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:22,973 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:22,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:22,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:22,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:22,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:22,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:22,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:22,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:22,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:22,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:22,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:40:23,247 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:23,260 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:23,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:23,265 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:23,266 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:23,266 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 10:40:23,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e62dcadc/33f3c0ed724f47f8b1dd303ced0c9a04/FLAGdbc9a6b9c [2020-07-21 10:40:23,847 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:23,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-07-21 10:40:23,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e62dcadc/33f3c0ed724f47f8b1dd303ced0c9a04/FLAGdbc9a6b9c [2020-07-21 10:40:24,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e62dcadc/33f3c0ed724f47f8b1dd303ced0c9a04 [2020-07-21 10:40:24,181 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:24,184 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:24,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:24,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:24,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:24,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5c25f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24, skipping insertion in model container [2020-07-21 10:40:24,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:24,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:24,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:24,483 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:24,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:24,636 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:24,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24 WrapperNode [2020-07-21 10:40:24,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:24,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:24,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:24,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:24,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,676 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... [2020-07-21 10:40:24,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:24,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:24,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:24,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:24,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 10:40:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-07-21 10:40:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-07-21 10:40:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-07-21 10:40:24,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 10:40:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-07-21 10:40:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 10:40:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-07-21 10:40:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-07-21 10:40:24,757 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-07-21 10:40:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:24,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:25,228 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:25,228 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 10:40:25,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:25 BoogieIcfgContainer [2020-07-21 10:40:25,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:25,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:25,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:25,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:25,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:24" (1/3) ... [2020-07-21 10:40:25,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1946b451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:25, skipping insertion in model container [2020-07-21 10:40:25,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:24" (2/3) ... [2020-07-21 10:40:25,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1946b451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:25, skipping insertion in model container [2020-07-21 10:40:25,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:25" (3/3) ... [2020-07-21 10:40:25,242 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-07-21 10:40:25,252 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:25,260 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:25,271 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:25,295 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:25,296 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:25,296 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:25,296 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:25,296 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:25,297 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:25,297 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:25,297 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:25,317 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-07-21 10:40:25,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-21 10:40:25,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:25,328 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:25,328 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:25,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-07-21 10:40:25,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:25,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137923513] [2020-07-21 10:40:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:25,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 10:40:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 10:40:25,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:25,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137923513] [2020-07-21 10:40:25,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:25,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 10:40:25,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472349764] [2020-07-21 10:40:25,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 10:40:25,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 10:40:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 10:40:25,575 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2020-07-21 10:40:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:25,628 INFO L93 Difference]: Finished difference Result 118 states and 174 transitions. [2020-07-21 10:40:25,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 10:40:25,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2020-07-21 10:40:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:25,641 INFO L225 Difference]: With dead ends: 118 [2020-07-21 10:40:25,642 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:40:25,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 10:40:25,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:40:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-21 10:40:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 10:40:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2020-07-21 10:40:25,697 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2020-07-21 10:40:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:25,699 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2020-07-21 10:40:25,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 10:40:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2020-07-21 10:40:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 10:40:25,703 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:25,703 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:25,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:25,918 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:25,919 INFO L82 PathProgramCache]: Analyzing trace with hash -880454641, now seen corresponding path program 1 times [2020-07-21 10:40:25,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:25,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774920152] [2020-07-21 10:40:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:26,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 10:40:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 10:40:26,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:26,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774920152] [2020-07-21 10:40:26,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:26,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:26,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128733722] [2020-07-21 10:40:26,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:26,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:26,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:26,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:26,060 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 4 states. [2020-07-21 10:40:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:26,111 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-07-21 10:40:26,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 10:40:26,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 50 [2020-07-21 10:40:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:26,117 INFO L225 Difference]: With dead ends: 64 [2020-07-21 10:40:26,119 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 10:40:26,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:26,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 10:40:26,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-07-21 10:40:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 10:40:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2020-07-21 10:40:26,134 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 50 [2020-07-21 10:40:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:26,135 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2020-07-21 10:40:26,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2020-07-21 10:40:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 10:40:26,137 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:26,138 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:26,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:26,352 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:26,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1901522995, now seen corresponding path program 1 times [2020-07-21 10:40:26,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:26,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581473938] [2020-07-21 10:40:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:26,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:40:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:26,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:26,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581473938] [2020-07-21 10:40:26,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:26,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 10:40:26,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026267993] [2020-07-21 10:40:26,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:40:26,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:26,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:40:26,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:26,574 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2020-07-21 10:40:26,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:26,780 INFO L93 Difference]: Finished difference Result 89 states and 121 transitions. [2020-07-21 10:40:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:40:26,782 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-07-21 10:40:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:26,786 INFO L225 Difference]: With dead ends: 89 [2020-07-21 10:40:26,786 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 10:40:26,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:40:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 10:40:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-07-21 10:40:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 10:40:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2020-07-21 10:40:26,802 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 50 [2020-07-21 10:40:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:26,803 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2020-07-21 10:40:26,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:40:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2020-07-21 10:40:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-21 10:40:26,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:26,805 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:27,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,008 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1643357557, now seen corresponding path program 1 times [2020-07-21 10:40:27,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:27,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724942560] [2020-07-21 10:40:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:40:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:27,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:27,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724942560] [2020-07-21 10:40:27,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:27,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 10:40:27,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115354446] [2020-07-21 10:40:27,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 10:40:27,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:27,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 10:40:27,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:40:27,139 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand 7 states. [2020-07-21 10:40:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:27,235 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2020-07-21 10:40:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:40:27,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-07-21 10:40:27,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:27,238 INFO L225 Difference]: With dead ends: 75 [2020-07-21 10:40:27,238 INFO L226 Difference]: Without dead ends: 70 [2020-07-21 10:40:27,239 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 [2020-07-21 10:40:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-21 10:40:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-07-21 10:40:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 10:40:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 89 transitions. [2020-07-21 10:40:27,250 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 89 transitions. Word has length 50 [2020-07-21 10:40:27,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:27,250 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 89 transitions. [2020-07-21 10:40:27,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 10:40:27,250 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 89 transitions. [2020-07-21 10:40:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:40:27,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:27,253 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:27,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,468 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1046629615, now seen corresponding path program 1 times [2020-07-21 10:40:27,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:27,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659757471] [2020-07-21 10:40:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:27,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:40:27,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 10:40:27,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:27,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659757471] [2020-07-21 10:40:27,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:27,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:40:27,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752681719] [2020-07-21 10:40:27,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:27,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:27,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:27,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:27,552 INFO L87 Difference]: Start difference. First operand 67 states and 89 transitions. Second operand 6 states. [2020-07-21 10:40:27,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:27,596 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2020-07-21 10:40:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:27,597 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-21 10:40:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:27,599 INFO L225 Difference]: With dead ends: 73 [2020-07-21 10:40:27,599 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 10:40:27,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 10:40:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-07-21 10:40:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 10:40:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-21 10:40:27,608 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 52 [2020-07-21 10:40:27,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:27,609 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-21 10:40:27,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:27,609 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-21 10:40:27,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 10:40:27,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:27,612 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:27,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,828 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:27,828 INFO L82 PathProgramCache]: Analyzing trace with hash 989371313, now seen corresponding path program 1 times [2020-07-21 10:40:27,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:27,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658628356] [2020-07-21 10:40:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:27,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 10:40:27,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-07-21 10:40:27,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:27,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658628356] [2020-07-21 10:40:27,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:27,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 10:40:27,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715838944] [2020-07-21 10:40:27,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:27,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:27,932 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 6 states. [2020-07-21 10:40:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:27,986 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2020-07-21 10:40:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:27,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 52 [2020-07-21 10:40:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:27,989 INFO L225 Difference]: With dead ends: 81 [2020-07-21 10:40:27,989 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 10:40:27,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:40:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 10:40:27,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-07-21 10:40:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 10:40:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2020-07-21 10:40:27,998 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 52 [2020-07-21 10:40:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:27,999 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2020-07-21 10:40:27,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2020-07-21 10:40:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 10:40:28,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:28,001 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:28,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,217 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:28,218 INFO L82 PathProgramCache]: Analyzing trace with hash -823640004, now seen corresponding path program 1 times [2020-07-21 10:40:28,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:28,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14339327] [2020-07-21 10:40:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:28,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:40:28,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 10:40:28,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:28,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14339327] [2020-07-21 10:40:28,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 10:40:28,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-21 10:40:28,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923535455] [2020-07-21 10:40:28,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:40:28,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:40:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:40:28,419 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 10 states. [2020-07-21 10:40:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:28,588 INFO L93 Difference]: Finished difference Result 117 states and 156 transitions. [2020-07-21 10:40:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:40:28,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-07-21 10:40:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:28,591 INFO L225 Difference]: With dead ends: 117 [2020-07-21 10:40:28,591 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 10:40:28,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:40:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 10:40:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-07-21 10:40:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 10:40:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 107 transitions. [2020-07-21 10:40:28,604 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 107 transitions. Word has length 54 [2020-07-21 10:40:28,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:28,605 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 107 transitions. [2020-07-21 10:40:28,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:40:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 107 transitions. [2020-07-21 10:40:28,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-21 10:40:28,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:28,607 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:28,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,814 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:28,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:28,815 INFO L82 PathProgramCache]: Analyzing trace with hash -165486742, now seen corresponding path program 1 times [2020-07-21 10:40:28,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:28,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922919521] [2020-07-21 10:40:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:28,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:40:28,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:28,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:29,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922919521] [2020-07-21 10:40:29,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:29,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-21 10:40:29,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270276488] [2020-07-21 10:40:29,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:40:29,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:40:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:40:29,160 INFO L87 Difference]: Start difference. First operand 78 states and 107 transitions. Second operand 15 states. [2020-07-21 10:40:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:29,433 INFO L93 Difference]: Finished difference Result 131 states and 178 transitions. [2020-07-21 10:40:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:40:29,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-07-21 10:40:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:29,437 INFO L225 Difference]: With dead ends: 131 [2020-07-21 10:40:29,437 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 10:40:29,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:40:29,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 10:40:29,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 88. [2020-07-21 10:40:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 10:40:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2020-07-21 10:40:29,455 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 57 [2020-07-21 10:40:29,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:29,455 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2020-07-21 10:40:29,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:40:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2020-07-21 10:40:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 10:40:29,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:29,457 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:29,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:29,668 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:29,669 INFO L82 PathProgramCache]: Analyzing trace with hash -777472083, now seen corresponding path program 2 times [2020-07-21 10:40:29,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:29,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844682141] [2020-07-21 10:40:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:29,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 10:40:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 10:40:29,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:29,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844682141] [2020-07-21 10:40:29,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:29,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:29,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568157988] [2020-07-21 10:40:29,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:29,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:29,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:29,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:29,739 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand 4 states. [2020-07-21 10:40:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:29,814 INFO L93 Difference]: Finished difference Result 178 states and 249 transitions. [2020-07-21 10:40:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 10:40:29,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-07-21 10:40:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:29,818 INFO L225 Difference]: With dead ends: 178 [2020-07-21 10:40:29,818 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 10:40:29,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:29,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 10:40:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-07-21 10:40:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 10:40:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 130 transitions. [2020-07-21 10:40:29,843 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 130 transitions. Word has length 58 [2020-07-21 10:40:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:29,843 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 130 transitions. [2020-07-21 10:40:29,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 130 transitions. [2020-07-21 10:40:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 10:40:29,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:29,846 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:30,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:30,047 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:30,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:30,047 INFO L82 PathProgramCache]: Analyzing trace with hash 102424817, now seen corresponding path program 1 times [2020-07-21 10:40:30,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:30,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594418509] [2020-07-21 10:40:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:30,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 10:40:30,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 10:40:30,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:30,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594418509] [2020-07-21 10:40:30,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:30,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:30,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544156247] [2020-07-21 10:40:30,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:30,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:30,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:30,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:30,121 INFO L87 Difference]: Start difference. First operand 94 states and 130 transitions. Second operand 4 states. [2020-07-21 10:40:30,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:30,209 INFO L93 Difference]: Finished difference Result 190 states and 267 transitions. [2020-07-21 10:40:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:40:30,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-07-21 10:40:30,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:30,215 INFO L225 Difference]: With dead ends: 190 [2020-07-21 10:40:30,216 INFO L226 Difference]: Without dead ends: 104 [2020-07-21 10:40:30,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:30,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-07-21 10:40:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2020-07-21 10:40:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-07-21 10:40:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 124 transitions. [2020-07-21 10:40:30,234 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 124 transitions. Word has length 58 [2020-07-21 10:40:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:30,234 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 124 transitions. [2020-07-21 10:40:30,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 124 transitions. [2020-07-21 10:40:30,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-21 10:40:30,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:30,237 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:30,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:30,438 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:30,439 INFO L82 PathProgramCache]: Analyzing trace with hash 500214288, now seen corresponding path program 1 times [2020-07-21 10:40:30,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:30,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064507662] [2020-07-21 10:40:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:30,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 10:40:30,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:30,500 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-21 10:40:30,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:30,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064507662] [2020-07-21 10:40:30,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:30,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:30,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003523068] [2020-07-21 10:40:30,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:30,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:30,503 INFO L87 Difference]: Start difference. First operand 92 states and 124 transitions. Second operand 4 states. [2020-07-21 10:40:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:30,579 INFO L93 Difference]: Finished difference Result 171 states and 222 transitions. [2020-07-21 10:40:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:40:30,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-07-21 10:40:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:30,582 INFO L225 Difference]: With dead ends: 171 [2020-07-21 10:40:30,582 INFO L226 Difference]: Without dead ends: 79 [2020-07-21 10:40:30,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-21 10:40:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2020-07-21 10:40:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 10:40:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-07-21 10:40:30,595 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 59 [2020-07-21 10:40:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:30,595 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-07-21 10:40:30,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:30,600 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-07-21 10:40:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-21 10:40:30,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:30,601 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:30,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:30,815 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:30,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:30,815 INFO L82 PathProgramCache]: Analyzing trace with hash -450159748, now seen corresponding path program 1 times [2020-07-21 10:40:30,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:30,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352494260] [2020-07-21 10:40:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:30,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 10:40:30,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:30,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:30,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352494260] [2020-07-21 10:40:30,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:30,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 10:40:30,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228590001] [2020-07-21 10:40:30,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 10:40:30,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 10:40:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 10:40:30,883 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 4 states. [2020-07-21 10:40:30,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:30,924 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2020-07-21 10:40:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 10:40:30,925 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-07-21 10:40:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:30,926 INFO L225 Difference]: With dead ends: 129 [2020-07-21 10:40:30,926 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 10:40:30,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 10:40:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-21 10:40:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 10:40:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2020-07-21 10:40:30,939 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 64 [2020-07-21 10:40:30,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:30,939 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2020-07-21 10:40:30,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 10:40:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2020-07-21 10:40:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-21 10:40:30,941 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:30,941 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:31,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:31,150 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:31,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:31,151 INFO L82 PathProgramCache]: Analyzing trace with hash -762078403, now seen corresponding path program 1 times [2020-07-21 10:40:31,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:31,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612411161] [2020-07-21 10:40:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:31,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:40:31,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:31,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:31,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612411161] [2020-07-21 10:40:31,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:31,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:40:31,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757760346] [2020-07-21 10:40:31,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:40:31,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:31,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:40:31,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:31,240 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 5 states. [2020-07-21 10:40:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:31,351 INFO L93 Difference]: Finished difference Result 145 states and 174 transitions. [2020-07-21 10:40:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:31,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-07-21 10:40:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:31,353 INFO L225 Difference]: With dead ends: 145 [2020-07-21 10:40:31,353 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 10:40:31,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 10:40:31,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2020-07-21 10:40:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 10:40:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-07-21 10:40:31,365 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 66 [2020-07-21 10:40:31,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:31,366 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-07-21 10:40:31,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:40:31,366 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-07-21 10:40:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-21 10:40:31,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:31,368 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:31,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:31,581 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:31,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 30284491, now seen corresponding path program 1 times [2020-07-21 10:40:31,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:31,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556647183] [2020-07-21 10:40:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:31,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:40:31,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:31,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:31,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556647183] [2020-07-21 10:40:31,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:31,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 10:40:31,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949976362] [2020-07-21 10:40:31,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:40:31,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:40:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-07-21 10:40:31,764 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 8 states. [2020-07-21 10:40:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:31,836 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2020-07-21 10:40:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:31,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 67 [2020-07-21 10:40:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:31,838 INFO L225 Difference]: With dead ends: 156 [2020-07-21 10:40:31,838 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 10:40:31,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:40:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 10:40:31,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2020-07-21 10:40:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 10:40:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2020-07-21 10:40:31,847 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 67 [2020-07-21 10:40:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:31,848 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2020-07-21 10:40:31,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:40:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2020-07-21 10:40:31,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-21 10:40:31,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:31,849 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:32,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:32,063 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:32,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1383334604, now seen corresponding path program 1 times [2020-07-21 10:40:32,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:32,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518523537] [2020-07-21 10:40:32,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:32,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 10:40:32,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 27 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:32,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:32,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518523537] [2020-07-21 10:40:32,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:32,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-21 10:40:32,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917423090] [2020-07-21 10:40:32,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 10:40:32,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:32,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 10:40:32,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 10:40:32,257 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 10 states. [2020-07-21 10:40:36,565 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 10:40:38,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:38,830 INFO L93 Difference]: Finished difference Result 189 states and 233 transitions. [2020-07-21 10:40:38,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:40:38,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-21 10:40:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:38,831 INFO L225 Difference]: With dead ends: 189 [2020-07-21 10:40:38,832 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 10:40:38,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=91, Invalid=148, Unknown=1, NotChecked=0, Total=240 [2020-07-21 10:40:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 10:40:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2020-07-21 10:40:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 10:40:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2020-07-21 10:40:38,841 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 69 [2020-07-21 10:40:38,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:38,841 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2020-07-21 10:40:38,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 10:40:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2020-07-21 10:40:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-07-21 10:40:38,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:38,846 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:39,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:39,059 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:39,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1160017596, now seen corresponding path program 2 times [2020-07-21 10:40:39,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:39,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745123679] [2020-07-21 10:40:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:39,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:40:39,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:39,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:39,386 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:39,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745123679] [2020-07-21 10:40:39,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:39,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-07-21 10:40:39,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488715662] [2020-07-21 10:40:39,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 10:40:39,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:39,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 10:40:39,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:40:39,388 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand 14 states. [2020-07-21 10:40:39,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:39,498 INFO L93 Difference]: Finished difference Result 212 states and 269 transitions. [2020-07-21 10:40:39,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:40:39,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-07-21 10:40:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:39,501 INFO L225 Difference]: With dead ends: 212 [2020-07-21 10:40:39,501 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 10:40:39,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:40:39,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 10:40:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 98. [2020-07-21 10:40:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 10:40:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-21 10:40:39,513 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 76 [2020-07-21 10:40:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:39,514 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-21 10:40:39,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 10:40:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-21 10:40:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-21 10:40:39,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:39,515 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:39,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:39,724 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:39,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1135497332, now seen corresponding path program 2 times [2020-07-21 10:40:39,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:39,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508138328] [2020-07-21 10:40:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:39,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:40:39,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:40:39,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 53 refuted. 3 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:40:42,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508138328] [2020-07-21 10:40:42,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:42,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-07-21 10:40:42,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639155099] [2020-07-21 10:40:42,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:40:42,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:42,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:40:42,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=208, Unknown=1, NotChecked=0, Total=306 [2020-07-21 10:40:42,258 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 18 states. [2020-07-21 10:40:44,826 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 10:40:59,350 WARN L193 SmtUtils]: Spent 12.29 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 10:41:19,392 WARN L193 SmtUtils]: Spent 15.89 s on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-07-21 10:41:31,986 WARN L193 SmtUtils]: Spent 8.37 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 10:41:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:45,071 INFO L93 Difference]: Finished difference Result 223 states and 277 transitions. [2020-07-21 10:41:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 10:41:45,072 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-07-21 10:41:45,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:45,074 INFO L225 Difference]: With dead ends: 223 [2020-07-21 10:41:45,074 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 10:41:45,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=317, Invalid=602, Unknown=11, NotChecked=0, Total=930 [2020-07-21 10:41:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 10:41:45,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 108. [2020-07-21 10:41:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-21 10:41:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 137 transitions. [2020-07-21 10:41:45,086 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 137 transitions. Word has length 81 [2020-07-21 10:41:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:45,086 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 137 transitions. [2020-07-21 10:41:45,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:41:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 137 transitions. [2020-07-21 10:41:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-07-21 10:41:45,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:45,088 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:45,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:45,302 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:45,303 INFO L82 PathProgramCache]: Analyzing trace with hash -18637924, now seen corresponding path program 3 times [2020-07-21 10:41:45,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:45,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550750730] [2020-07-21 10:41:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:45,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:41:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 26 proven. 155 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:41:45,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 4 proven. 165 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:41:45,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550750730] [2020-07-21 10:41:45,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:45,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-07-21 10:41:45,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858636686] [2020-07-21 10:41:45,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 10:41:45,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:45,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 10:41:45,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:41:45,999 INFO L87 Difference]: Start difference. First operand 108 states and 137 transitions. Second operand 26 states. [2020-07-21 10:41:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:46,233 INFO L93 Difference]: Finished difference Result 320 states and 421 transitions. [2020-07-21 10:41:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 10:41:46,234 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 94 [2020-07-21 10:41:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:46,236 INFO L225 Difference]: With dead ends: 320 [2020-07-21 10:41:46,236 INFO L226 Difference]: Without dead ends: 218 [2020-07-21 10:41:46,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=383, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:41:46,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-21 10:41:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 134. [2020-07-21 10:41:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 10:41:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 168 transitions. [2020-07-21 10:41:46,260 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 168 transitions. Word has length 94 [2020-07-21 10:41:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:46,260 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 168 transitions. [2020-07-21 10:41:46,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 10:41:46,261 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 168 transitions. [2020-07-21 10:41:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-21 10:41:46,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:46,263 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:46,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:46,478 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:46,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1473926900, now seen corresponding path program 3 times [2020-07-21 10:41:46,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:46,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489544526] [2020-07-21 10:41:46,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 33 conjunts are in the unsatisfiable core [2020-07-21 10:41:46,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 27 proven. 273 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:41:46,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 4 proven. 284 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:41:47,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489544526] [2020-07-21 10:41:47,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:47,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2020-07-21 10:41:47,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195261544] [2020-07-21 10:41:47,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 10:41:47,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 10:41:47,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 10:41:47,789 INFO L87 Difference]: Start difference. First operand 134 states and 168 transitions. Second operand 34 states. [2020-07-21 10:42:11,743 WARN L193 SmtUtils]: Spent 12.33 s on a formula simplification. DAG size of input: 59 DAG size of output: 17 [2020-07-21 10:42:26,837 WARN L193 SmtUtils]: Spent 4.33 s on a formula simplification. DAG size of input: 53 DAG size of output: 17 [2020-07-21 10:43:05,707 WARN L193 SmtUtils]: Spent 20.82 s on a formula simplification. DAG size of input: 47 DAG size of output: 17 [2020-07-21 10:43:36,991 WARN L193 SmtUtils]: Spent 14.85 s on a formula simplification. DAG size of input: 41 DAG size of output: 17 [2020-07-21 10:44:08,838 WARN L193 SmtUtils]: Spent 22.80 s on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2020-07-21 10:44:24,523 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-07-21 10:44:31,879 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2020-07-21 10:44:44,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:44,828 INFO L93 Difference]: Finished difference Result 291 states and 365 transitions. [2020-07-21 10:44:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-21 10:44:44,830 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 105 [2020-07-21 10:44:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:44,832 INFO L225 Difference]: With dead ends: 291 [2020-07-21 10:44:44,833 INFO L226 Difference]: Without dead ends: 169 [2020-07-21 10:44:44,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 176.3s TimeCoverageRelationStatistics Valid=921, Invalid=2229, Unknown=42, NotChecked=0, Total=3192 [2020-07-21 10:44:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-21 10:44:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 138. [2020-07-21 10:44:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-21 10:44:44,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 175 transitions. [2020-07-21 10:44:44,848 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 175 transitions. Word has length 105 [2020-07-21 10:44:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:44,848 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 175 transitions. [2020-07-21 10:44:44,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 10:44:44,849 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2020-07-21 10:44:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-07-21 10:44:44,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:44,850 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:45,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:45,064 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:45,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:45,065 INFO L82 PathProgramCache]: Analyzing trace with hash 613252444, now seen corresponding path program 4 times [2020-07-21 10:44:45,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:45,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315058449] [2020-07-21 10:44:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:45,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-21 10:44:45,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 26 proven. 737 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 10:44:45,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 4 proven. 747 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-21 10:44:47,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315058449] [2020-07-21 10:44:47,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:47,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2020-07-21 10:44:47,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980710573] [2020-07-21 10:44:47,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-21 10:44:47,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:47,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-21 10:44:47,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2020-07-21 10:44:47,419 INFO L87 Difference]: Start difference. First operand 138 states and 175 transitions. Second operand 50 states. [2020-07-21 10:44:47,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:47,869 INFO L93 Difference]: Finished difference Result 518 states and 701 transitions. [2020-07-21 10:44:47,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-07-21 10:44:47,874 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 130 [2020-07-21 10:44:47,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:47,877 INFO L225 Difference]: With dead ends: 518 [2020-07-21 10:44:47,878 INFO L226 Difference]: Without dead ends: 386 [2020-07-21 10:44:47,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1207, Invalid=1343, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 10:44:47,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-21 10:44:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 206. [2020-07-21 10:44:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-21 10:44:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2020-07-21 10:44:47,906 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 130 [2020-07-21 10:44:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:47,907 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2020-07-21 10:44:47,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-21 10:44:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2020-07-21 10:44:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 10:44:47,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:47,909 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:48,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:48,124 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:48,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 4 times [2020-07-21 10:44:48,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:48,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730203144] [2020-07-21 10:44:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:48,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 10:44:48,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:49,619 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 [2020-07-21 10:44:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 10:44:49,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:53,813 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 8 [2020-07-21 10:44:53,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730203144] [2020-07-21 10:44:53,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 10:44:53,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 10:44:53,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122694920] [2020-07-21 10:44:53,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 10:44:53,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:53,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 10:44:53,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2020-07-21 10:44:53,815 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand 8 states. [2020-07-21 10:44:53,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:53,919 INFO L93 Difference]: Finished difference Result 242 states and 308 transitions. [2020-07-21 10:44:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:44:53,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-07-21 10:44:53,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:53,922 INFO L225 Difference]: With dead ends: 242 [2020-07-21 10:44:53,922 INFO L226 Difference]: Without dead ends: 232 [2020-07-21 10:44:53,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=20, Invalid=55, Unknown=1, NotChecked=14, Total=90 [2020-07-21 10:44:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-21 10:44:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 218. [2020-07-21 10:44:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-21 10:44:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 280 transitions. [2020-07-21 10:44:53,940 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 280 transitions. Word has length 135 [2020-07-21 10:44:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:53,940 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 280 transitions. [2020-07-21 10:44:53,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 10:44:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 280 transitions. [2020-07-21 10:44:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 10:44:53,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:53,942 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:54,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:54,157 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:54,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:54,157 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-07-21 10:44:54,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:54,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008508296] [2020-07-21 10:44:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 10:44:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-07-21 10:44:54,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:54,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008508296] [2020-07-21 10:44:54,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 10:44:54,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 10:44:54,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990480456] [2020-07-21 10:44:54,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:44:54,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:44:54,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-07-21 10:44:54,604 INFO L87 Difference]: Start difference. First operand 218 states and 280 transitions. Second operand 9 states. [2020-07-21 10:44:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:54,743 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2020-07-21 10:44:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:44:54,743 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-07-21 10:44:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:54,744 INFO L225 Difference]: With dead ends: 226 [2020-07-21 10:44:54,744 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:44:54,745 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 [2020-07-21 10:44:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:44:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:44:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:44:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:44:54,746 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-07-21 10:44:54,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:54,747 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:44:54,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:44:54,747 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:44:54,747 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:44:54,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:54,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:44:55,615 WARN L193 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 11 [2020-07-21 10:44:55,841 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-21 10:44:56,029 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-21 10:44:56,238 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 6 [2020-07-21 10:44:56,906 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 1026 DAG size of output: 896 [2020-07-21 10:44:57,090 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 533 DAG size of output: 446 [2020-07-21 10:44:57,531 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 2246 DAG size of output: 20 [2020-07-21 10:44:57,792 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 593 [2020-07-21 10:44:57,957 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 710 DAG size of output: 9 [2020-07-21 10:44:58,337 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 2255 DAG size of output: 35 [2020-07-21 10:44:58,617 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 2255 DAG size of output: 35 [2020-07-21 10:44:59,262 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 22 [2020-07-21 10:44:59,741 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 27 [2020-07-21 10:45:00,604 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 908 DAG size of output: 20 [2020-07-21 10:45:00,613 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 10:45:00,614 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:45:00,614 INFO L268 CegarLoopResult]: For program point L19(lines 19 24) no Hoare annotation was computed. [2020-07-21 10:45:00,614 INFO L268 CegarLoopResult]: For program point L48(lines 47 62) no Hoare annotation was computed. [2020-07-21 10:45:00,614 INFO L264 CegarLoopResult]: At program point L69(lines 18 71) the Hoare annotation is: (and (or (not (= 0 (mod |base2flt_#in~m| 4294967296))) (and (<= |base2flt_#in~e| base2flt_~e) (= base2flt_~m |base2flt_#in~m|) (<= base2flt_~e |base2flt_#in~e|))) (or (= 0 base2flt_~__retres4~0) (not (= 0 (mod |base2flt_#in~m| 4294967296))))) [2020-07-21 10:45:00,614 INFO L268 CegarLoopResult]: For program point L28(lines 27 42) no Hoare annotation was computed. [2020-07-21 10:45:00,615 INFO L268 CegarLoopResult]: For program point L49(lines 47 62) no Hoare annotation was computed. [2020-07-21 10:45:00,615 INFO L268 CegarLoopResult]: For program point L37(lines 37 41) no Hoare annotation was computed. [2020-07-21 10:45:00,615 INFO L264 CegarLoopResult]: At program point L37-1(lines 27 42) the Hoare annotation is: (and (not (= 0 (mod |base2flt_#in~m| 4294967296))) (or (not (= 1 |base2flt_#in~m|)) (< (mod base2flt_~m 4294967296) 16777216)) (<= base2flt_~e |base2flt_#in~e|)) [2020-07-21 10:45:00,615 INFO L268 CegarLoopResult]: For program point L25(lines 25 65) no Hoare annotation was computed. [2020-07-21 10:45:00,615 INFO L271 CegarLoopResult]: At program point base2fltENTRY(lines 14 72) the Hoare annotation is: true [2020-07-21 10:45:00,615 INFO L268 CegarLoopResult]: For program point base2fltFINAL(lines 14 72) no Hoare annotation was computed. [2020-07-21 10:45:00,616 INFO L264 CegarLoopResult]: At program point L63(lines 25 65) the Hoare annotation is: (not (= 0 (mod |base2flt_#in~m| 4294967296))) [2020-07-21 10:45:00,616 INFO L268 CegarLoopResult]: For program point base2fltEXIT(lines 14 72) no Hoare annotation was computed. [2020-07-21 10:45:00,616 INFO L264 CegarLoopResult]: At program point L47-2(lines 47 62) the Hoare annotation is: (and (<= 16777216 (mod |base2flt_#in~m| 4294967296)) (<= |base2flt_#in~e| base2flt_~e)) [2020-07-21 10:45:00,616 INFO L268 CegarLoopResult]: For program point mulfltEXIT(lines 137 209) no Hoare annotation was computed. [2020-07-21 10:45:00,616 INFO L268 CegarLoopResult]: For program point L184(lines 184 201) no Hoare annotation was computed. [2020-07-21 10:45:00,616 INFO L268 CegarLoopResult]: For program point L184-2(lines 184 201) no Hoare annotation was computed. [2020-07-21 10:45:00,616 INFO L268 CegarLoopResult]: For program point L193(lines 193 198) no Hoare annotation was computed. [2020-07-21 10:45:00,616 INFO L268 CegarLoopResult]: For program point mulfltFINAL(lines 137 209) no Hoare annotation was computed. [2020-07-21 10:45:00,616 INFO L271 CegarLoopResult]: At program point mulfltENTRY(lines 137 209) the Hoare annotation is: true [2020-07-21 10:45:00,617 INFO L268 CegarLoopResult]: For program point L185(lines 185 190) no Hoare annotation was computed. [2020-07-21 10:45:00,617 INFO L268 CegarLoopResult]: For program point L148(lines 148 154) no Hoare annotation was computed. [2020-07-21 10:45:00,617 INFO L268 CegarLoopResult]: For program point L148-2(lines 147 208) no Hoare annotation was computed. [2020-07-21 10:45:00,617 INFO L268 CegarLoopResult]: For program point L175(lines 175 180) no Hoare annotation was computed. [2020-07-21 10:45:00,617 INFO L264 CegarLoopResult]: At program point L206(lines 147 208) the Hoare annotation is: (let ((.cse2 (= 0 mulflt_~__retres10~1)) (.cse0 (not (= 0 (mod |mulflt_#in~a| 4294967296)))) (.cse1 (exists ((v_mulflt_~a_6 Int)) (< (mod v_mulflt_~a_6 4294967296) (mod |mulflt_#in~b| 4294967296))))) (or (and .cse0 (= mulflt_~b |mulflt_#in~a|) .cse1) (and .cse2 .cse1) (and (= mulflt_~b |mulflt_#in~b|) .cse2) (and .cse0 (= mulflt_~a |mulflt_#in~a|) .cse1))) [2020-07-21 10:45:00,617 INFO L268 CegarLoopResult]: For program point L169(lines 169 174) no Hoare annotation was computed. [2020-07-21 10:45:00,617 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 10:45:00,617 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 10:45:00,617 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 10:45:00,617 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 10:45:00,617 INFO L268 CegarLoopResult]: For program point L250(lines 250 254) no Hoare annotation was computed. [2020-07-21 10:45:00,617 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 210 266) no Hoare annotation was computed. [2020-07-21 10:45:00,618 INFO L268 CegarLoopResult]: For program point L250-2(lines 250 254) no Hoare annotation was computed. [2020-07-21 10:45:00,618 INFO L268 CegarLoopResult]: For program point L246(lines 246 262) no Hoare annotation was computed. [2020-07-21 10:45:00,618 INFO L268 CegarLoopResult]: For program point L246-1(lines 246 262) no Hoare annotation was computed. [2020-07-21 10:45:00,618 INFO L268 CegarLoopResult]: For program point L244(line 244) no Hoare annotation was computed. [2020-07-21 10:45:00,618 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 210 266) no Hoare annotation was computed. [2020-07-21 10:45:00,618 INFO L268 CegarLoopResult]: For program point L236(lines 236 240) no Hoare annotation was computed. [2020-07-21 10:45:00,618 INFO L268 CegarLoopResult]: For program point L236-2(lines 236 240) no Hoare annotation was computed. [2020-07-21 10:45:00,618 INFO L264 CegarLoopResult]: At program point L230(line 230) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 10:45:00,618 INFO L268 CegarLoopResult]: For program point L230-1(line 230) no Hoare annotation was computed. [2020-07-21 10:45:00,618 INFO L271 CegarLoopResult]: At program point L228(line 228) the Hoare annotation is: true [2020-07-21 10:45:00,619 INFO L268 CegarLoopResult]: For program point L228-1(line 228) no Hoare annotation was computed. [2020-07-21 10:45:00,619 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 210 266) the Hoare annotation is: true [2020-07-21 10:45:00,619 INFO L268 CegarLoopResult]: For program point L247(lines 247 256) no Hoare annotation was computed. [2020-07-21 10:45:00,619 INFO L264 CegarLoopResult]: At program point L247-2(lines 247 256) the Hoare annotation is: (and (= 0 main_~tmp___0~0) (= 0 main_~tmp___1~0)) [2020-07-21 10:45:00,619 INFO L268 CegarLoopResult]: For program point L233(lines 233 242) no Hoare annotation was computed. [2020-07-21 10:45:00,619 INFO L264 CegarLoopResult]: At program point L231(line 231) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 10:45:00,619 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 (<= (mod main_~zero~0 4294967296) 0) (= 0 main_~b~0)) (and (<= (mod main_~b~0 4294967296) 0) .cse0) (and (<= 1 main_~tmp~2) (<= 1 main_~sb~0)) (<= (+ main_~sb~0 1) 0))) [2020-07-21 10:45:00,619 INFO L268 CegarLoopResult]: For program point L231-1(line 231) no Hoare annotation was computed. [2020-07-21 10:45:00,619 INFO L264 CegarLoopResult]: At program point L229(line 229) the Hoare annotation is: (= 0 main_~zero~0) [2020-07-21 10:45:00,619 INFO L268 CegarLoopResult]: For program point L229-1(line 229) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point addfltENTRY(lines 73 136) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point addfltFINAL(lines 73 136) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point L116(lines 116 121) no Hoare annotation was computed. [2020-07-21 10:45:00,620 INFO L268 CegarLoopResult]: For program point L108(lines 108 113) no Hoare annotation was computed. [2020-07-21 10:45:00,621 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-21 10:45:00,621 INFO L268 CegarLoopResult]: For program point L104-1(line 104) no Hoare annotation was computed. [2020-07-21 10:45:00,621 INFO L268 CegarLoopResult]: For program point L133(lines 83 135) no Hoare annotation was computed. [2020-07-21 10:45:00,621 INFO L268 CegarLoopResult]: For program point addfltEXIT(lines 73 136) no Hoare annotation was computed. [2020-07-21 10:45:00,621 INFO L268 CegarLoopResult]: For program point L84(lines 84 90) no Hoare annotation was computed. [2020-07-21 10:45:00,621 INFO L268 CegarLoopResult]: For program point L115(lines 115 126) no Hoare annotation was computed. [2020-07-21 10:45:00,621 INFO L268 CegarLoopResult]: For program point L84-2(lines 83 135) no Hoare annotation was computed. [2020-07-21 10:45:00,621 INFO L268 CegarLoopResult]: For program point L115-2(lines 115 126) no Hoare annotation was computed. [2020-07-21 10:45:00,640 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,642 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,642 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,643 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,643 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,643 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:45:00 BoogieIcfgContainer [2020-07-21 10:45:00,647 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:45:00,648 INFO L168 Benchmark]: Toolchain (without parser) took 276465.91 ms. Allocated memory was 136.8 MB in the beginning and 359.7 MB in the end (delta: 222.8 MB). Free memory was 101.0 MB in the beginning and 296.2 MB in the end (delta: -195.2 MB). Peak memory consumption was 246.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:45:00,649 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 10:45:00,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 451.34 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 100.6 MB in the beginning and 179.8 MB in the end (delta: -79.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2020-07-21 10:45:00,650 INFO L168 Benchmark]: Boogie Preprocessor took 44.63 ms. Allocated memory is still 201.3 MB. Free memory was 179.8 MB in the beginning and 177.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:45:00,650 INFO L168 Benchmark]: RCFGBuilder took 551.14 ms. Allocated memory is still 201.3 MB. Free memory was 177.4 MB in the beginning and 152.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-07-21 10:45:00,651 INFO L168 Benchmark]: TraceAbstraction took 275412.34 ms. Allocated memory was 201.3 MB in the beginning and 359.7 MB in the end (delta: 158.3 MB). Free memory was 152.1 MB in the beginning and 296.2 MB in the end (delta: -144.1 MB). Peak memory consumption was 232.6 MB. Max. memory is 7.1 GB. [2020-07-21 10:45:00,653 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory is still 119.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 451.34 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 100.6 MB in the beginning and 179.8 MB in the end (delta: -79.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.63 ms. Allocated memory is still 201.3 MB. Free memory was 179.8 MB in the beginning and 177.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 551.14 ms. Allocated memory is still 201.3 MB. Free memory was 177.4 MB in the beginning and 152.1 MB in the end (delta: 25.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 275412.34 ms. Allocated memory was 201.3 MB in the beginning and 359.7 MB in the end (delta: 158.3 MB). Free memory was 152.1 MB in the beginning and 296.2 MB in the end (delta: -144.1 MB). Peak memory consumption was 232.6 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 == \old(m) % 4294967296) || ((\old(e) <= e && m == \old(m)) && e <= \old(e))) && (0 == __retres4 || !(0 == \old(m) % 4294967296)) - InvariantResult [Line: 147]: Loop Invariant [2020-07-21 10:45:00,660 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,660 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,660 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,661 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,661 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] [2020-07-21 10:45:00,661 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_mulflt_~a_6,QUANTIFIED] Derived loop invariant: ((((!(0 == \old(a) % 4294967296) && b == \old(a)) && (\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(b) && 0 == __retres10)) || ((!(0 == \old(a) % 4294967296) && a == \old(a)) && (\exists v_mulflt_~a_6 : int :: v_mulflt_~a_6 % 4294967296 < \old(b) % 4294967296)) - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: 16777216 <= \old(m) % 4294967296 && \old(e) <= e - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (!(0 == \old(m) % 4294967296) && (!(1 == \old(m)) || m % 4294967296 < 16777216)) && e <= \old(e) - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 72 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 269.6s, OverallIterations: 22, TraceHistogramMax: 24, AutomataDifference: 249.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 5.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1459 SDtfs, 2259 SDslu, 6763 SDs, 0 SdLazy, 2841 SolverSat, 474 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2387 GetRequests, 2085 SyntacticMatches, 15 SemanticMatches, 287 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 256.7s 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: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 495 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 18 LocationsWithAnnotation, 314 PreInvPairs, 1541 NumberOfFragments, 181 HoareAnnotationTreeSize, 314 FomulaSimplifications, 803893490 FormulaSimplificationTreeSizeReduction, 4.1s HoareSimplificationTime, 18 FomulaSimplificationsInter, 13552 FormulaSimplificationTreeSizeReductionInter, 1.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 14.1s 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...