/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:14:55,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:14:55,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:14:55,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:14:55,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:14:55,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:14:55,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:14:55,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:14:55,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:14:55,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:14:55,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:14:55,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:14:55,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:14:55,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:14:55,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:14:55,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:14:55,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:14:55,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:14:55,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:14:55,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:14:55,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:14:55,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:14:55,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:14:55,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:14:55,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:14:55,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:14:55,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:14:55,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:14:55,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:14:55,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:14:55,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:14:55,142 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:14:55,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:14:55,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:14:55,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:14:55,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:14:55,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:14:55,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:14:55,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:14:55,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:14:55,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:14:55,152 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:14:55,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:14:55,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:14:55,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:14:55,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:14:55,173 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:14:55,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:14:55,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:14:55,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:14:55,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:14:55,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:14:55,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:14:55,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:14:55,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:14:55,175 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:14:55,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:14:55,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:14:55,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:14:55,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:14:55,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:14:55,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:14:55,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:14:55,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:14:55,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:14:55,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:14:55,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:14:55,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:14:55,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:55,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:14:55,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:14:55,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:14:55,530 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:14:55,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:14:55,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:14:55,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:14:55,556 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:14:55,558 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2020-07-20 11:14:55,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64decd1fe/465ae9300e3e455cbbce9d5f12a5d30a/FLAGedb15f610 [2020-07-20 11:14:56,287 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:14:56,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i5_o5-2.c [2020-07-20 11:14:56,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64decd1fe/465ae9300e3e455cbbce9d5f12a5d30a/FLAGedb15f610 [2020-07-20 11:14:56,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64decd1fe/465ae9300e3e455cbbce9d5f12a5d30a [2020-07-20 11:14:56,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:14:56,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:14:56,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:14:56,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:14:56,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:14:56,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:14:56" (1/1) ... [2020-07-20 11:14:56,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd29c43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:56, skipping insertion in model container [2020-07-20 11:14:56,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:14:56" (1/1) ... [2020-07-20 11:14:56,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:14:56,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:14:57,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:14:57,034 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:14:57,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:14:57,074 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:14:57,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57 WrapperNode [2020-07-20 11:14:57,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:14:57,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:14:57,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:14:57,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:14:57,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57" (1/1) ... [2020-07-20 11:14:57,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57" (1/1) ... [2020-07-20 11:14:57,105 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57" (1/1) ... [2020-07-20 11:14:57,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57" (1/1) ... [2020-07-20 11:14:57,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57" (1/1) ... [2020-07-20 11:14:57,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57" (1/1) ... [2020-07-20 11:14:57,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57" (1/1) ... [2020-07-20 11:14:57,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:14:57,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:14:57,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:14:57,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:14:57,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:14:57,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:14:57,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:14:57,297 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 11:14:57,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:14:57,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:14:57,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:14:57,297 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 11:14:57,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:14:57,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:14:57,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:14:57,507 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:14:57,508 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:14:57,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:14:57 BoogieIcfgContainer [2020-07-20 11:14:57,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:14:57,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:14:57,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:14:57,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:14:57,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:14:56" (1/3) ... [2020-07-20 11:14:57,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14edabf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:14:57, skipping insertion in model container [2020-07-20 11:14:57,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:57" (2/3) ... [2020-07-20 11:14:57,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14edabf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:14:57, skipping insertion in model container [2020-07-20 11:14:57,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:14:57" (3/3) ... [2020-07-20 11:14:57,526 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-2.c [2020-07-20 11:14:57,541 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:14:57,551 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:14:57,571 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:14:57,604 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:14:57,604 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:14:57,605 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:14:57,605 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:14:57,605 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:14:57,605 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:14:57,605 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:14:57,606 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:14:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 11:14:57,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:14:57,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:57,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:57,643 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:57,653 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 11:14:57,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:57,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474209440] [2020-07-20 11:14:57,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:57,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:14:57,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:14:57,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:14:57,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474209440] [2020-07-20 11:14:57,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:14:57,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:14:57,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910675208] [2020-07-20 11:14:57,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:14:57,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:57,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:14:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:14:57,979 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 11:14:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:58,093 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 11:14:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:14:58,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:14:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:58,106 INFO L225 Difference]: With dead ends: 30 [2020-07-20 11:14:58,107 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 11:14:58,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:14:58,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 11:14:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 11:14:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 11:14:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 11:14:58,166 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 11:14:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:58,166 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 11:14:58,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:14:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 11:14:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:14:58,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:58,170 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:58,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:58,386 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:58,387 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 11:14:58,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:58,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967435521] [2020-07-20 11:14:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:14:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:14:58,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:58,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:58,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:14:58,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967435521] [2020-07-20 11:14:58,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:58,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 11:14:58,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420306207] [2020-07-20 11:14:58,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:14:58,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:58,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:14:58,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:14:58,795 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-20 11:14:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:58,953 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 11:14:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:14:58,955 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-20 11:14:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:58,958 INFO L225 Difference]: With dead ends: 25 [2020-07-20 11:14:58,958 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 11:14:58,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:14:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 11:14:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 11:14:58,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 11:14:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 11:14:58,981 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 11:14:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:58,984 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 11:14:58,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:14:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 11:14:58,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:14:58,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:58,990 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:59,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:59,206 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:59,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:59,208 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-20 11:14:59,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:59,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706948723] [2020-07-20 11:14:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:14:59,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 11:14:59,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:59,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:59,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:59,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:59,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:59,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 11:14:59,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706948723] [2020-07-20 11:14:59,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:59,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 11:14:59,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772212620] [2020-07-20 11:14:59,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:14:59,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:59,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:14:59,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:14:59,816 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-20 11:14:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:59,964 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 11:14:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:14:59,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-20 11:14:59,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:59,967 INFO L225 Difference]: With dead ends: 28 [2020-07-20 11:14:59,968 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 11:14:59,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:14:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 11:14:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 11:14:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 11:14:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 11:14:59,992 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 11:14:59,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:59,993 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 11:14:59,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:14:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 11:14:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 11:14:59,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:59,997 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:00,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:00,212 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:00,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:00,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-20 11:15:00,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:00,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556404614] [2020-07-20 11:15:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:00,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:15:00,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:15:00,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:00,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:00,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:15:01,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556404614] [2020-07-20 11:15:01,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:01,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 11:15:01,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379800552] [2020-07-20 11:15:01,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:15:01,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:15:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:15:01,088 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-20 11:15:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:01,211 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 11:15:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:15:01,216 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-20 11:15:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:01,218 INFO L225 Difference]: With dead ends: 31 [2020-07-20 11:15:01,218 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 11:15:01,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:15:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 11:15:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 11:15:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 11:15:01,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 11:15:01,227 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 11:15:01,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:01,227 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 11:15:01,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:15:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 11:15:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 11:15:01,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:01,230 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:01,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:01,447 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-20 11:15:01,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:01,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028837948] [2020-07-20 11:15:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:01,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:15:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 11:15:01,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:02,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 11:15:02,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028837948] [2020-07-20 11:15:02,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:02,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 14 [2020-07-20 11:15:02,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571118636] [2020-07-20 11:15:02,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:15:02,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:02,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:15:02,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:15:02,704 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2020-07-20 11:15:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:02,834 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 11:15:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:15:02,841 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-07-20 11:15:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:02,843 INFO L225 Difference]: With dead ends: 34 [2020-07-20 11:15:02,843 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:15:02,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:02,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:15:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:15:02,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:15:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 11:15:02,851 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 11:15:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:02,852 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 11:15:02,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:15:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 11:15:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 11:15:02,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:02,853 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:03,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:03,058 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:03,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:03,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-20 11:15:03,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:03,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270156185] [2020-07-20 11:15:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:03,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 11:15:03,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 11:15:03,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 11:15:03,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270156185] [2020-07-20 11:15:03,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:03,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-07-20 11:15:03,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558933445] [2020-07-20 11:15:03,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:15:03,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:15:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:15:03,622 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-07-20 11:15:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:03,736 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 11:15:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 11:15:03,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-07-20 11:15:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:03,739 INFO L225 Difference]: With dead ends: 37 [2020-07-20 11:15:03,739 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:15:03,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:15:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:15:03,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 11:15:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:15:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 11:15:03,749 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 11:15:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:03,749 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 11:15:03,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:15:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 11:15:03,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 11:15:03,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:03,752 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:03,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:03,967 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:03,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-20 11:15:03,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:03,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [312630977] [2020-07-20 11:15:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:04,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:04,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:04,155 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 11:15:04,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:15:04,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [312630977] [2020-07-20 11:15:04,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:15:04,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-20 11:15:04,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112151226] [2020-07-20 11:15:04,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:15:04,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:04,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:15:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:15:04,158 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-07-20 11:15:04,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:04,290 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-07-20 11:15:04,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:15:04,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-07-20 11:15:04,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:04,291 INFO L225 Difference]: With dead ends: 33 [2020-07-20 11:15:04,292 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:15:04,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:15:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:15:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:15:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:15:04,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:15:04,294 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-07-20 11:15:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:04,295 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:15:04,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:15:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:15:04,295 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:15:04,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:04,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:15:04,582 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 11:15:04,582 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:15:04,582 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:15:04,582 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:15:04,582 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:15:04,583 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:15:04,584 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-20 11:15:04,584 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-20 11:15:04,584 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-20 11:15:04,585 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-20 11:15:04,585 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-20 11:15:04,585 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2020-07-20 11:15:04,586 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-20 11:15:04,586 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-20 11:15:04,586 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-20 11:15:04,586 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-20 11:15:04,586 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-20 11:15:04,587 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (and (<= |id_#in~x| id_~x) (<= id_~x |id_#in~x|)) [2020-07-20 11:15:04,587 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 11:15:04,587 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-20 11:15:04,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:15:04 BoogieIcfgContainer [2020-07-20 11:15:04,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:15:04,604 INFO L168 Benchmark]: Toolchain (without parser) took 7949.32 ms. Allocated memory was 134.7 MB in the beginning and 296.7 MB in the end (delta: 162.0 MB). Free memory was 99.1 MB in the beginning and 229.1 MB in the end (delta: -130.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:15:04,606 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 134.7 MB. Free memory was 116.6 MB in the beginning and 116.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:15:04,607 INFO L168 Benchmark]: CACSL2BoogieTranslator took 419.92 ms. Allocated memory is still 134.7 MB. Free memory was 98.7 MB in the beginning and 89.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:15:04,611 INFO L168 Benchmark]: Boogie Preprocessor took 42.15 ms. Allocated memory is still 134.7 MB. Free memory was 89.5 MB in the beginning and 88.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:15:04,617 INFO L168 Benchmark]: RCFGBuilder took 394.44 ms. Allocated memory was 134.7 MB in the beginning and 198.7 MB in the end (delta: 64.0 MB). Free memory was 88.0 MB in the beginning and 167.2 MB in the end (delta: -79.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:15:04,618 INFO L168 Benchmark]: TraceAbstraction took 7079.87 ms. Allocated memory was 198.7 MB in the beginning and 296.7 MB in the end (delta: 98.0 MB). Free memory was 167.2 MB in the beginning and 229.1 MB in the end (delta: -61.9 MB). Peak memory consumption was 36.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:15:04,632 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 134.7 MB. Free memory was 116.6 MB in the beginning and 116.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 419.92 ms. Allocated memory is still 134.7 MB. Free memory was 98.7 MB in the beginning and 89.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.15 ms. Allocated memory is still 134.7 MB. Free memory was 89.5 MB in the beginning and 88.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 394.44 ms. Allocated memory was 134.7 MB in the beginning and 198.7 MB in the end (delta: 64.0 MB). Free memory was 88.0 MB in the beginning and 167.2 MB in the end (delta: -79.2 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7079.87 ms. Allocated memory was 198.7 MB in the beginning and 296.7 MB in the end (delta: 98.0 MB). Free memory was 167.2 MB in the beginning and 229.1 MB in the end (delta: -61.9 MB). Peak memory consumption was 36.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.8s, OverallIterations: 7, TraceHistogramMax: 7, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 115 SDtfs, 132 SDslu, 603 SDs, 0 SdLazy, 298 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 387 GetRequests, 272 SyntacticMatches, 29 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 19 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 360 ConstructedInterpolants, 0 QuantifiedInterpolants, 29280 SizeOfPredicates, 28 NumberOfNonLiveVariables, 511 ConjunctsInSsa, 83 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 264/474 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...