/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/loop-acceleration/simple_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:57:11,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:57:11,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:57:11,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:57:11,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:57:11,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:57:11,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:57:11,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:57:11,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:57:11,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:57:11,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:57:11,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:57:11,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:57:11,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:57:11,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:57:11,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:57:11,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:57:11,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:57:11,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:57:11,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:57:11,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:57:11,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:57:11,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:57:11,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:57:11,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:57:11,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:57:11,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:57:11,333 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:57:11,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:57:11,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:57:11,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:57:11,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:57:11,338 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:57:11,339 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:57:11,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:57:11,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:57:11,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:57:11,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:57:11,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:57:11,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:57:11,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:57:11,352 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 [2020-10-28 14:57:11,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:57:11,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:57:11,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:57:11,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:57:11,407 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:57:11,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:57:11,407 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:57:11,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:57:11,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:57:11,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:57:11,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:57:11,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:57:11,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:57:11,410 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:57:11,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:57:11,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:57:11,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:57:11,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:57:11,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:57:11,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:57:11,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:57:11,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:57:11,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:57:11,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:57:11,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:57:11,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:57:11,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:57:11,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:57:11,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:57:11,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:57:11,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:57:11,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:57:11,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:57:11,898 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:57:11,899 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:57:11,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_1-2.c [2020-10-28 14:57:11,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46fc994d5/8a22e1a52f1a420d9e66f743a6aa817f/FLAG5962f7dcc [2020-10-28 14:57:12,643 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:57:12,644 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_1-2.c [2020-10-28 14:57:12,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46fc994d5/8a22e1a52f1a420d9e66f743a6aa817f/FLAG5962f7dcc [2020-10-28 14:57:13,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46fc994d5/8a22e1a52f1a420d9e66f743a6aa817f [2020-10-28 14:57:13,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:57:13,036 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:57:13,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:13,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:57:13,045 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:57:13,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:13" (1/1) ... [2020-10-28 14:57:13,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193924e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13, skipping insertion in model container [2020-10-28 14:57:13,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:57:13" (1/1) ... [2020-10-28 14:57:13,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:57:13,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:57:13,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:13,302 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:57:13,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:57:13,342 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:57:13,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13 WrapperNode [2020-10-28 14:57:13,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:57:13,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:57:13,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:57:13,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:57:13,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13" (1/1) ... [2020-10-28 14:57:13,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13" (1/1) ... [2020-10-28 14:57:13,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13" (1/1) ... [2020-10-28 14:57:13,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13" (1/1) ... [2020-10-28 14:57:13,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13" (1/1) ... [2020-10-28 14:57:13,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13" (1/1) ... [2020-10-28 14:57:13,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13" (1/1) ... [2020-10-28 14:57:13,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:57:13,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:57:13,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:57:13,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:57:13,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13" (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 [2020-10-28 14:57:13,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:57:13,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:57:13,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:57:13,496 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 14:57:13,496 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:57:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:57:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:57:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:57:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:57:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 14:57:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:57:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:57:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:57:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:57:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:57:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:57:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:57:13,767 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:57:13,768 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:57:13,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:13 BoogieIcfgContainer [2020-10-28 14:57:13,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:57:13,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:57:13,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:57:13,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:57:13,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:57:13" (1/3) ... [2020-10-28 14:57:13,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2bfb85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:13, skipping insertion in model container [2020-10-28 14:57:13,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:57:13" (2/3) ... [2020-10-28 14:57:13,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2bfb85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:57:13, skipping insertion in model container [2020-10-28 14:57:13,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:57:13" (3/3) ... [2020-10-28 14:57:13,780 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_1-2.c [2020-10-28 14:57:13,794 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:57:13,799 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:57:13,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:57:13,877 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:57:13,877 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:57:13,877 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:57:13,878 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:57:13,878 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:57:13,878 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:57:13,878 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:57:13,878 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:57:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-28 14:57:13,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:57:13,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:13,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:13,904 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:13,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:13,911 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-28 14:57:13,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:13,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509436692] [2020-10-28 14:57:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:14,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:14,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:14,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:14,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:57:14,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:14,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-28 14:57:14,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:14,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:14,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 14:57:14,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:14,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 14:57:14,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:14,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:14,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:14,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:14,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:14,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:57:14,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:14,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:14,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:14,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:14,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:14,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:14,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509436692] [2020-10-28 14:57:14,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:14,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:57:14,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32025969] [2020-10-28 14:57:14,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 14:57:14,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:14,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 14:57:14,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:57:14,683 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-10-28 14:57:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:14,759 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-28 14:57:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:57:14,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 14:57:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:14,769 INFO L225 Difference]: With dead ends: 34 [2020-10-28 14:57:14,769 INFO L226 Difference]: Without dead ends: 13 [2020-10-28 14:57:14,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 14:57:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-28 14:57:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-28 14:57:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-28 14:57:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-28 14:57:14,818 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-10-28 14:57:14,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:14,818 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-28 14:57:14,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 14:57:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-28 14:57:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:57:14,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:14,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:14,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:57:14,820 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-10-28 14:57:14,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:14,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796803462] [2020-10-28 14:57:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:14,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:14,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:15,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:15,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:57:15,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:15,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-28 14:57:15,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:15,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:15,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:57:15,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:15,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:57:15,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:57:15,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:15,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:15,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:15,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:15,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:15,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 14:57:15,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:15,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:15,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:15,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:15,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796803462] [2020-10-28 14:57:15,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:57:15,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:57:15,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493514972] [2020-10-28 14:57:15,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:57:15,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:15,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:57:15,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:57:15,197 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-28 14:57:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:15,271 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-28 14:57:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:57:15,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-28 14:57:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:15,273 INFO L225 Difference]: With dead ends: 20 [2020-10-28 14:57:15,273 INFO L226 Difference]: Without dead ends: 14 [2020-10-28 14:57:15,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:57:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-28 14:57:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-28 14:57:15,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-28 14:57:15,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-28 14:57:15,284 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-28 14:57:15,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:15,284 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-28 14:57:15,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:57:15,285 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-28 14:57:15,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-28 14:57:15,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:15,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:15,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:57:15,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:15,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:15,287 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-28 14:57:15,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:15,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442783478] [2020-10-28 14:57:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:15,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:15,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:15,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:15,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:57:15,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:15,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 251 [2020-10-28 14:57:15,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:15,554 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:57:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:15,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 14:57:15,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:15,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:15,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:15,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:15,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:15,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:15,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:57:15,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:15,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:15,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:15,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442783478] [2020-10-28 14:57:15,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:15,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 14:57:15,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552070184] [2020-10-28 14:57:15,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:57:15,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:15,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:57:15,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:57:15,650 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 5 states. [2020-10-28 14:57:15,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:15,768 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-28 14:57:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:57:15,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-28 14:57:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:15,770 INFO L225 Difference]: With dead ends: 21 [2020-10-28 14:57:15,770 INFO L226 Difference]: Without dead ends: 15 [2020-10-28 14:57:15,771 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 [2020-10-28 14:57:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-28 14:57:15,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-28 14:57:15,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-28 14:57:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-28 14:57:15,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-28 14:57:15,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:15,777 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-28 14:57:15,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:57:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-28 14:57:15,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:57:15,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:57:15,780 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:57:15,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:57:15,780 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:57:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:57:15,781 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-28 14:57:15,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:57:15,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658490809] [2020-10-28 14:57:15,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:57:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:15,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:15,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:16,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:16,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:57:16,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:57:16,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-28 14:57:16,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:16,062 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:57:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:57:16,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:57:16,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:57:16,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:57:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:57:16,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:57:16,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:57:16,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:57:16,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:57:16,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:57:16,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:57:16,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:57:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:57:16,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:57:16,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:57:16,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:57:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:57:16,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658490809] [2020-10-28 14:57:16,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:57:16,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:57:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986396180] [2020-10-28 14:57:16,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:57:16,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:57:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:57:16,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:57:16,205 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-28 14:57:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:57:16,430 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-10-28 14:57:16,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:57:16,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-28 14:57:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:57:16,431 INFO L225 Difference]: With dead ends: 15 [2020-10-28 14:57:16,431 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:57:16,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:57:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:57:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:57:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:57:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:57:16,433 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-10-28 14:57:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:57:16,433 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:57:16,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:57:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:57:16,434 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:57:16,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:57:16,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 14:57:16,606 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-28 14:57:16,607 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-28 14:57:16,607 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-28 14:57:16,607 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-28 14:57:16,607 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:57:16,607 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|)) [2020-10-28 14:57:16,608 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:57:16,608 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:57:16,608 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 14:57:16,608 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 14:57:16,608 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:57:16,608 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 12 20) the Hoare annotation is: true [2020-10-28 14:57:16,608 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 12 20) no Hoare annotation was computed. [2020-10-28 14:57:16,608 INFO L270 CegarLoopResult]: At program point L15-2(lines 15 17) the Hoare annotation is: (<= main_~x~0 (* 2 (div main_~x~0 2))) [2020-10-28 14:57:16,609 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 12 20) no Hoare annotation was computed. [2020-10-28 14:57:16,609 INFO L270 CegarLoopResult]: At program point L15-3(lines 15 17) the Hoare annotation is: (<= main_~x~0 (* 2 (div main_~x~0 2))) [2020-10-28 14:57:16,609 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2020-10-28 14:57:16,610 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2020-10-28 14:57:16,610 INFO L270 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-10-28 14:57:16,610 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-10-28 14:57:16,610 INFO L274 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-10-28 14:57:16,610 INFO L274 CegarLoopResult]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2020-10-28 14:57:16,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:57:16 BoogieIcfgContainer [2020-10-28 14:57:16,629 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:57:16,635 INFO L168 Benchmark]: Toolchain (without parser) took 3600.66 ms. Allocated memory was 152.0 MB in the beginning and 190.8 MB in the end (delta: 38.8 MB). Free memory was 127.4 MB in the beginning and 107.6 MB in the end (delta: 19.8 MB). Peak memory consumption was 59.8 MB. Max. memory is 8.0 GB. [2020-10-28 14:57:16,636 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 152.0 MB. Free memory was 124.9 MB in the beginning and 124.8 MB in the end (delta: 79.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:57:16,640 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.81 ms. Allocated memory is still 152.0 MB. Free memory was 126.8 MB in the beginning and 117.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:57:16,641 INFO L168 Benchmark]: Boogie Preprocessor took 55.48 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:57:16,642 INFO L168 Benchmark]: RCFGBuilder took 368.13 ms. Allocated memory is still 152.0 MB. Free memory was 115.8 MB in the beginning and 103.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-28 14:57:16,648 INFO L168 Benchmark]: TraceAbstraction took 2857.74 ms. Allocated memory was 152.0 MB in the beginning and 190.8 MB in the end (delta: 38.8 MB). Free memory was 103.5 MB in the beginning and 107.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 35.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:57:16,659 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 152.0 MB. Free memory was 124.9 MB in the beginning and 124.8 MB in the end (delta: 79.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 303.81 ms. Allocated memory is still 152.0 MB. Free memory was 126.8 MB in the beginning and 117.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.48 ms. Allocated memory is still 152.0 MB. Free memory was 117.2 MB in the beginning and 115.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 368.13 ms. Allocated memory is still 152.0 MB. Free memory was 115.8 MB in the beginning and 103.9 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2857.74 ms. Allocated memory was 152.0 MB in the beginning and 190.8 MB in the end (delta: 38.8 MB). Free memory was 103.5 MB in the beginning and 107.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 35.6 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: 15]: Loop Invariant Derived loop invariant: x <= 2 * (x / 2) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 45 SDtfs, 25 SDslu, 51 SDs, 0 SdLazy, 56 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 9 LocationsWithAnnotation, 18 PreInvPairs, 21 NumberOfFragments, 54 HoareAnnotationTreeSize, 18 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 212 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 2587 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4 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...