/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:52:07,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:52:07,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:52:07,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:52:07,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:52:07,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:52:07,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:52:07,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:52:07,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:52:07,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:52:07,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:52:07,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:52:07,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:52:07,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:52:07,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:52:07,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:52:07,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:52:07,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:52:07,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:52:07,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:52:07,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:52:07,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:52:07,254 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:52:07,255 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:52:07,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:52:07,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:52:07,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:52:07,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:52:07,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:52:07,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:52:07,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:52:07,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:52:07,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:52:07,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:52:07,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:52:07,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:52:07,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:52:07,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:52:07,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:52:07,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:52:07,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:52:07,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:52:07,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:52:07,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:52:07,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:52:07,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:52:07,345 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:52:07,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:52:07,345 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:52:07,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:52:07,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:52:07,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:52:07,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:52:07,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:52:07,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:52:07,347 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:52:07,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:52:07,348 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:52:07,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:52:07,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:52:07,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:52:07,349 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:52:07,349 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:52:07,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:52:07,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:52:07,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:52:07,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:52:07,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:52:07,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:52:07,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:52:07,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:52:07,350 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:52:07,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:52:07,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:52:07,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:52:07,848 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:52:07,848 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:52:07,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-10-29 09:52:07,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3459a85ab/e6babd7fa3a64faa9b19aaff631736c5/FLAG13f76f94a [2020-10-29 09:52:08,515 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:52:08,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_12.c [2020-10-29 09:52:08,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3459a85ab/e6babd7fa3a64faa9b19aaff631736c5/FLAG13f76f94a [2020-10-29 09:52:08,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3459a85ab/e6babd7fa3a64faa9b19aaff631736c5 [2020-10-29 09:52:08,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:52:08,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:52:08,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:52:08,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:52:08,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:52:08,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:52:08" (1/1) ... [2020-10-29 09:52:08,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cdc0333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:08, skipping insertion in model container [2020-10-29 09:52:08,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:52:08" (1/1) ... [2020-10-29 09:52:08,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:52:08,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:52:09,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:52:09,112 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:52:09,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:52:09,144 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:52:09,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09 WrapperNode [2020-10-29 09:52:09,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:52:09,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:52:09,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:52:09,146 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:52:09,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09" (1/1) ... [2020-10-29 09:52:09,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09" (1/1) ... [2020-10-29 09:52:09,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09" (1/1) ... [2020-10-29 09:52:09,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09" (1/1) ... [2020-10-29 09:52:09,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09" (1/1) ... [2020-10-29 09:52:09,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09" (1/1) ... [2020-10-29 09:52:09,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09" (1/1) ... [2020-10-29 09:52:09,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:52:09,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:52:09,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:52:09,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:52:09,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-29 09:52:09,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:52:09,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:52:09,267 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:52:09,267 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:52:09,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:52:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:52:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:52:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:52:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:52:09,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:52:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:52:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:52:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:52:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:52:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:52:09,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:52:09,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:52:09,514 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:52:09,514 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:52:09,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:52:09 BoogieIcfgContainer [2020-10-29 09:52:09,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:52:09,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:52:09,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:52:09,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:52:09,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:52:08" (1/3) ... [2020-10-29 09:52:09,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f581264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:52:09, skipping insertion in model container [2020-10-29 09:52:09,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:52:09" (2/3) ... [2020-10-29 09:52:09,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f581264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:52:09, skipping insertion in model container [2020-10-29 09:52:09,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:52:09" (3/3) ... [2020-10-29 09:52:09,542 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_12.c [2020-10-29 09:52:09,572 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:52:09,584 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:52:09,622 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:52:09,688 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:52:09,689 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:52:09,689 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:52:09,689 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:52:09,689 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:52:09,689 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:52:09,689 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:52:09,690 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:52:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-29 09:52:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:52:09,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:09,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:09,736 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:09,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1507135652, now seen corresponding path program 1 times [2020-10-29 09:52:09,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:09,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294707275] [2020-10-29 09:52:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:10,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:10,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:10,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:10,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:52:10,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:10,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-29 09:52:10,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:10,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:10,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:52:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:52:10,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:52:10,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:10,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:10,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:10,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:10,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:10,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:52:10,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:10,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:10,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:10,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:10,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:10,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:10,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294707275] [2020-10-29 09:52:10,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:52:10,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:52:10,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509185191] [2020-10-29 09:52:10,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:52:10,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:10,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:52:10,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:52:10,584 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-10-29 09:52:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:10,904 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2020-10-29 09:52:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:52:10,906 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-29 09:52:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:10,914 INFO L225 Difference]: With dead ends: 49 [2020-10-29 09:52:10,914 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:52:10,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:52:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:52:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:52:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:52:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-29 09:52:10,961 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2020-10-29 09:52:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:10,961 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-29 09:52:10,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:52:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-29 09:52:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:52:10,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:10,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:10,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:52:10,963 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:10,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1953512822, now seen corresponding path program 1 times [2020-10-29 09:52:10,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:10,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102815188] [2020-10-29 09:52:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:10,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:11,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:11,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:11,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:52:11,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:52:11,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-29 09:52:11,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:11,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:11,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:52:11,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:11,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-29 09:52:11,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:52:11,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:11,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:11,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:11,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:11,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:11,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:52:11,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:11,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:11,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:11,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:11,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:11,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:11,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102815188] [2020-10-29 09:52:11,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:11,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:52:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433103515] [2020-10-29 09:52:11,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:52:11,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:11,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:52:11,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:52:11,454 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2020-10-29 09:52:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:11,643 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-10-29 09:52:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:52:11,644 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-29 09:52:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:11,645 INFO L225 Difference]: With dead ends: 34 [2020-10-29 09:52:11,646 INFO L226 Difference]: Without dead ends: 28 [2020-10-29 09:52:11,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:52:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-29 09:52:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-10-29 09:52:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-29 09:52:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-29 09:52:11,669 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2020-10-29 09:52:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:11,669 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-29 09:52:11,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:52:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-29 09:52:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:52:11,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:11,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:11,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:52:11,672 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:11,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash -144391185, now seen corresponding path program 2 times [2020-10-29 09:52:11,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:11,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958729381] [2020-10-29 09:52:11,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:11,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:11,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:11,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:12,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:12,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-29 09:52:12,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:52:12,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-29 09:52:12,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:12,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:12,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 09:52:12,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:12,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-29 09:52:12,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:52:12,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:12,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:12,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:12,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:12,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:12,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:52:12,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:12,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:12,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:12,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:12,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:12,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:52:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:52:12,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958729381] [2020-10-29 09:52:12,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:12,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 09:52:12,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935678556] [2020-10-29 09:52:12,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 09:52:12,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:12,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 09:52:12,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:52:12,121 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-10-29 09:52:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:12,281 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-29 09:52:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:52:12,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-29 09:52:12,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:12,283 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:52:12,283 INFO L226 Difference]: Without dead ends: 24 [2020-10-29 09:52:12,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:52:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-29 09:52:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-29 09:52:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-29 09:52:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-29 09:52:12,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2020-10-29 09:52:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:12,292 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-29 09:52:12,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 09:52:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-29 09:52:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 09:52:12,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:52:12,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:52:12,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:52:12,294 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:52:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:52:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1838613802, now seen corresponding path program 1 times [2020-10-29 09:52:12,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:52:12,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371963157] [2020-10-29 09:52:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:52:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:12,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:12,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:12,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:12,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:13,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:13,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 09:52:13,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:52:13,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 834 [2020-10-29 09:52:13,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:13,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:13,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:52:13,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:52:13,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:52:13,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:13,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:52:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:52:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:52:13,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:52:13,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:52:13,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:52:13,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:52:13,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:52:13,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:52:13,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:52:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:52:13,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:52:13,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:52:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-29 09:52:13,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371963157] [2020-10-29 09:52:13,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:52:13,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:52:13,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384020168] [2020-10-29 09:52:13,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:52:13,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:52:13,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:52:13,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:52:13,278 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-10-29 09:52:13,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:52:13,487 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-29 09:52:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:52:13,487 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-29 09:52:13,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:52:13,488 INFO L225 Difference]: With dead ends: 23 [2020-10-29 09:52:13,488 INFO L226 Difference]: Without dead ends: 0 [2020-10-29 09:52:13,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:52:13,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-29 09:52:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-29 09:52:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-29 09:52:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-29 09:52:13,490 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-10-29 09:52:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:52:13,490 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-29 09:52:13,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:52:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-29 09:52:13,490 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-29 09:52:13,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:52:13,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-29 09:52:13,740 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-29 09:52:13,741 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-29 09:52:13,741 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-29 09:52:13,741 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-29 09:52:13,741 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:52:13,741 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-29 09:52:13,741 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:52:13,742 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-29 09:52:13,742 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-29 09:52:13,742 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-29 09:52:13,742 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-29 09:52:13,742 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 6 17) the Hoare annotation is: true [2020-10-29 09:52:13,742 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 6 17) no Hoare annotation was computed. [2020-10-29 09:52:13,742 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-29 09:52:13,742 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 6 17) no Hoare annotation was computed. [2020-10-29 09:52:13,743 INFO L274 CegarLoopResult]: For program point L11(lines 11 12) no Hoare annotation was computed. [2020-10-29 09:52:13,743 INFO L274 CegarLoopResult]: For program point L11-2(lines 11 12) no Hoare annotation was computed. [2020-10-29 09:52:13,743 INFO L270 CegarLoopResult]: At program point L10-2(lines 10 14) the Hoare annotation is: (= main_~z~0 (* (div main_~z~0 2) 2)) [2020-10-29 09:52:13,743 INFO L270 CegarLoopResult]: At program point L10-3(lines 10 14) the Hoare annotation is: (= main_~z~0 (* (div main_~z~0 2) 2)) [2020-10-29 09:52:13,743 INFO L274 CegarLoopResult]: For program point L4-4(line 4) no Hoare annotation was computed. [2020-10-29 09:52:13,743 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 4) the Hoare annotation is: true [2020-10-29 09:52:13,744 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 4) no Hoare annotation was computed. [2020-10-29 09:52:13,744 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-29 09:52:13,744 INFO L270 CegarLoopResult]: At program point L4-1(line 4) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-29 09:52:13,744 INFO L274 CegarLoopResult]: For program point L4-2(line 4) no Hoare annotation was computed. [2020-10-29 09:52:13,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:52:13 BoogieIcfgContainer [2020-10-29 09:52:13,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:52:13,764 INFO L168 Benchmark]: Toolchain (without parser) took 4873.99 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 126.3 MB in the beginning and 143.3 MB in the end (delta: -16.9 MB). Peak memory consumption was 99.8 MB. Max. memory is 8.0 GB. [2020-10-29 09:52:13,765 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:52:13,766 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.74 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 116.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:52:13,767 INFO L168 Benchmark]: Boogie Preprocessor took 35.31 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-29 09:52:13,768 INFO L168 Benchmark]: RCFGBuilder took 336.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 101.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:52:13,770 INFO L168 Benchmark]: TraceAbstraction took 4238.25 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 101.3 MB in the beginning and 143.3 MB in the end (delta: -41.9 MB). Peak memory consumption was 74.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:52:13,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 151.0 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 243.74 ms. Allocated memory is still 151.0 MB. Free memory was 125.6 MB in the beginning and 116.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.31 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 336.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 101.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4238.25 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 101.3 MB in the beginning and 143.3 MB in the end (delta: -41.9 MB). Peak memory consumption was 74.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: 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: 10]: Loop Invariant Derived loop invariant: z == z / 2 * 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 52 SDtfs, 84 SDslu, 69 SDs, 0 SdLazy, 124 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 20 PreInvPairs, 26 NumberOfFragments, 53 HoareAnnotationTreeSize, 20 FomulaSimplifications, 262 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 9 FomulaSimplificationsInter, 206 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 62 ConstructedInterpolants, 0 QuantifiedInterpolants, 5776 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 10/18 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...