/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 14:21:05,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 14:21:05,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 14:21:05,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 14:21:05,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 14:21:05,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 14:21:05,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 14:21:05,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 14:21:05,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 14:21:05,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 14:21:05,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 14:21:05,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 14:21:05,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 14:21:05,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 14:21:05,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 14:21:05,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 14:21:05,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 14:21:05,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 14:21:05,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 14:21:05,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 14:21:05,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 14:21:05,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 14:21:05,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 14:21:05,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 14:21:05,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 14:21:05,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 14:21:05,199 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 14:21:05,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 14:21:05,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 14:21:05,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 14:21:05,202 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 14:21:05,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 14:21:05,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 14:21:05,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 14:21:05,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 14:21:05,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 14:21:05,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 14:21:05,206 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 14:21:05,206 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 14:21:05,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 14:21:05,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 14:21:05,209 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 14:21:05,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 14:21:05,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 14:21:05,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 14:21:05,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 14:21:05,225 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 14:21:05,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 14:21:05,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 14:21:05,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 14:21:05,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 14:21:05,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 14:21:05,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 14:21:05,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 14:21:05,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 14:21:05,227 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 14:21:05,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 14:21:05,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 14:21:05,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 14:21:05,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 14:21:05,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 14:21:05,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 14:21:05,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 14:21:05,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 14:21:05,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 14:21:05,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 14:21:05,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 14:21:05,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 14:21:05,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:21:05,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 14:21:05,230 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 14:21:05,230 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 14:21:05,575 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 14:21:05,589 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 14:21:05,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 14:21:05,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 14:21:05,595 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 14:21:05,595 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-20 14:21:05,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889f792a6/3faeeb70de0844999a8ea8f443f2f3de/FLAG681d4c1d4 [2020-07-20 14:21:06,113 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 14:21:06,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-2.c [2020-07-20 14:21:06,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889f792a6/3faeeb70de0844999a8ea8f443f2f3de/FLAG681d4c1d4 [2020-07-20 14:21:06,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/889f792a6/3faeeb70de0844999a8ea8f443f2f3de [2020-07-20 14:21:06,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 14:21:06,494 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 14:21:06,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 14:21:06,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 14:21:06,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 14:21:06,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:21:06" (1/1) ... [2020-07-20 14:21:06,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b61bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06, skipping insertion in model container [2020-07-20 14:21:06,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:21:06" (1/1) ... [2020-07-20 14:21:06,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 14:21:06,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 14:21:06,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:21:06,701 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 14:21:06,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 14:21:06,733 INFO L208 MainTranslator]: Completed translation [2020-07-20 14:21:06,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06 WrapperNode [2020-07-20 14:21:06,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 14:21:06,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 14:21:06,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 14:21:06,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 14:21:06,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06" (1/1) ... [2020-07-20 14:21:06,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06" (1/1) ... [2020-07-20 14:21:06,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06" (1/1) ... [2020-07-20 14:21:06,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06" (1/1) ... [2020-07-20 14:21:06,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06" (1/1) ... [2020-07-20 14:21:06,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06" (1/1) ... [2020-07-20 14:21:06,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06" (1/1) ... [2020-07-20 14:21:06,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 14:21:06,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 14:21:06,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 14:21:06,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 14:21:06,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06" (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 14:21:06,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 14:21:06,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 14:21:06,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 14:21:06,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 14:21:06,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 14:21:06,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 14:21:06,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 14:21:06,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 14:21:06,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 14:21:07,087 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 14:21:07,088 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 14:21:07,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:21:07 BoogieIcfgContainer [2020-07-20 14:21:07,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 14:21:07,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 14:21:07,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 14:21:07,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 14:21:07,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:21:06" (1/3) ... [2020-07-20 14:21:07,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5195ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:21:07, skipping insertion in model container [2020-07-20 14:21:07,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:06" (2/3) ... [2020-07-20 14:21:07,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5195ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:21:07, skipping insertion in model container [2020-07-20 14:21:07,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:21:07" (3/3) ... [2020-07-20 14:21:07,101 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-07-20 14:21:07,112 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 14:21:07,120 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 14:21:07,135 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 14:21:07,161 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 14:21:07,161 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 14:21:07,162 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 14:21:07,162 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 14:21:07,162 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 14:21:07,162 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 14:21:07,162 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 14:21:07,162 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 14:21:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-20 14:21:07,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 14:21:07,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:21:07,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:21:07,191 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:21:07,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:21:07,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-20 14:21:07,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:21:07,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647791004] [2020-07-20 14:21:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:21:07,269 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 14:21:07,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:21:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 14:21:07,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:21:07,350 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 14:21:07,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 14:21:07,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647791004] [2020-07-20 14:21:07,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 14:21:07,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 14:21:07,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503145135] [2020-07-20 14:21:07,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 14:21:07,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:21:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 14:21:07,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:21:07,402 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-20 14:21:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:21:07,454 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 14:21:07,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 14:21:07,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 14:21:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:21:07,465 INFO L225 Difference]: With dead ends: 29 [2020-07-20 14:21:07,465 INFO L226 Difference]: Without dead ends: 12 [2020-07-20 14:21:07,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 14:21:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-20 14:21:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-20 14:21:07,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-20 14:21:07,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-20 14:21:07,503 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-20 14:21:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:21:07,504 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-20 14:21:07,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 14:21:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-20 14:21:07,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-20 14:21:07,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:21:07,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:21:07,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:21:07,722 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:21:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:21:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-20 14:21:07,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:21:07,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692648354] [2020-07-20 14:21:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:21:07,767 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:21:07,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:21:07,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 14:21:07,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:21:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:21:07,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:21:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:21:07,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692648354] [2020-07-20 14:21:07,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:21:07,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 14:21:07,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667567691] [2020-07-20 14:21:07,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 14:21:07,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:21:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 14:21:07,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 14:21:07,856 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-20 14:21:07,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:21:07,919 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-20 14:21:07,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 14:21:07,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-20 14:21:07,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:21:07,921 INFO L225 Difference]: With dead ends: 20 [2020-07-20 14:21:07,921 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 14:21:07,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-20 14:21:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 14:21:07,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 14:21:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 14:21:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 14:21:07,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-20 14:21:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:21:07,929 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 14:21:07,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 14:21:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 14:21:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 14:21:07,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:21:07,930 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:21:08,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:21:08,145 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:21:08,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:21:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-20 14:21:08,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:21:08,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293727278] [2020-07-20 14:21:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:21:08,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 14:21:08,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:21:08,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 14:21:08,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:21:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:21:08,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:21:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:21:08,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293727278] [2020-07-20 14:21:08,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:21:08,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 14:21:08,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151726675] [2020-07-20 14:21:08,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 14:21:08,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:21:08,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 14:21:08,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:21:08,365 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-20 14:21:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:21:08,428 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-20 14:21:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 14:21:08,429 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-20 14:21:08,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:21:08,430 INFO L225 Difference]: With dead ends: 22 [2020-07-20 14:21:08,430 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 14:21:08,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-20 14:21:08,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 14:21:08,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 14:21:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 14:21:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 14:21:08,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-20 14:21:08,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:21:08,437 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 14:21:08,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 14:21:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 14:21:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 14:21:08,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 14:21:08,439 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 14:21:08,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:21:08,655 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 14:21:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 14:21:08,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times [2020-07-20 14:21:08,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 14:21:08,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768355600] [2020-07-20 14:21:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) 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 14:21:08,691 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 14:21:08,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 14:21:08,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 14:21:08,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 14:21:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:21:08,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 14:21:08,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 14:21:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 14:21:09,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768355600] [2020-07-20 14:21:09,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 14:21:09,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2020-07-20 14:21:09,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097173281] [2020-07-20 14:21:09,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 14:21:09,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 14:21:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 14:21:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-20 14:21:09,175 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 19 states. [2020-07-20 14:21:09,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 14:21:09,312 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-07-20 14:21:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 14:21:09,313 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 16 [2020-07-20 14:21:09,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 14:21:09,314 INFO L225 Difference]: With dead ends: 21 [2020-07-20 14:21:09,314 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 14:21:09,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-07-20 14:21:09,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 14:21:09,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 14:21:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 14:21:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 14:21:09,316 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-07-20 14:21:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 14:21:09,316 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 14:21:09,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 14:21:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 14:21:09,317 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 14:21:09,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 14:21:09,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 14:21:09,636 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 14:21:09,637 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:21:09,637 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 14:21:09,637 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 14:21:09,637 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 14:21:09,637 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 14:21:09,638 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2020-07-20 14:21:09,638 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2020-07-20 14:21:09,638 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2020-07-20 14:21:09,638 INFO L264 CegarLoopResult]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (= 4 main_~x~0) (= 1 main_~x~0) (= 5 main_~x~0) (= 6 main_~x~0) (= 0 main_~x~0) (= 2 main_~x~0) (= 3 main_~x~0)) [2020-07-20 14:21:09,638 INFO L264 CegarLoopResult]: At program point L14-3(lines 14 17) the Hoare annotation is: (= 6 main_~x~0) [2020-07-20 14:21:09,639 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-20 14:21:09,639 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-20 14:21:09,639 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-20 14:21:09,639 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-20 14:21:09,639 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-20 14:21:09,640 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-20 14:21:09,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:21:09 BoogieIcfgContainer [2020-07-20 14:21:09,659 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 14:21:09,662 INFO L168 Benchmark]: Toolchain (without parser) took 3169.52 ms. Allocated memory was 136.8 MB in the beginning and 230.7 MB in the end (delta: 93.8 MB). Free memory was 100.1 MB in the beginning and 154.1 MB in the end (delta: -54.0 MB). Peak memory consumption was 39.8 MB. Max. memory is 7.1 GB. [2020-07-20 14:21:09,664 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 14:21:09,664 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.35 ms. Allocated memory is still 136.8 MB. Free memory was 99.7 MB in the beginning and 90.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 14:21:09,665 INFO L168 Benchmark]: Boogie Preprocessor took 31.00 ms. Allocated memory is still 136.8 MB. Free memory was 90.3 MB in the beginning and 88.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 14:21:09,667 INFO L168 Benchmark]: RCFGBuilder took 326.06 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 88.9 MB in the beginning and 168.8 MB in the end (delta: -79.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:21:09,668 INFO L168 Benchmark]: TraceAbstraction took 2565.96 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 168.1 MB in the beginning and 154.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 43.9 MB. Max. memory is 7.1 GB. [2020-07-20 14:21:09,673 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 239.35 ms. Allocated memory is still 136.8 MB. Free memory was 99.7 MB in the beginning and 90.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.00 ms. Allocated memory is still 136.8 MB. Free memory was 90.3 MB in the beginning and 88.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 326.06 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 88.9 MB in the beginning and 168.8 MB in the end (delta: -79.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2565.96 ms. Allocated memory was 200.8 MB in the beginning and 230.7 MB in the end (delta: 29.9 MB). Free memory was 168.1 MB in the beginning and 154.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 43.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: (((((4 == x || 1 == x) || 5 == x) || 6 == x) || 0 == x) || 2 == x) || 3 == x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 2 SDslu, 160 SDs, 0 SdLazy, 152 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 19 NumberOfFragments, 30 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 25 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 51 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 3551 SizeOfPredicates, 5 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/64 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...