/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/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:37:46,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:37:46,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:37:46,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:37:46,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:37:46,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:37:46,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:37:46,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:37:46,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:37:46,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:37:46,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:37:46,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:37:46,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:37:46,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:37:46,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:37:46,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:37:46,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:37:46,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:37:46,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:37:46,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:37:46,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:37:46,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:37:46,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:37:46,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:37:46,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:37:46,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:37:46,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:37:46,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:37:46,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:37:46,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:37:46,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:37:46,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:37:46,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:37:46,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:37:46,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:37:46,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:37:46,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:37:46,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:37:46,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:37:46,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:37:46,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:37:46,850 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 09:37:46,879 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:37:46,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:37:46,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:37:46,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:37:46,881 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:37:46,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:37:46,882 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:37:46,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:37:46,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:37:46,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:37:46,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:37:46,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:37:46,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:37:46,883 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:37:46,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:37:46,883 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:37:46,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:37:46,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:37:46,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:37:46,884 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:37:46,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:37:46,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:37:46,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:37:46,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:37:46,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:37:46,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:37:46,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:37:46,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:37:46,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:37:46,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:37:47,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:37:47,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:37:47,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:37:47,284 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:37:47,285 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:37:47,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-29 09:37:47,391 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81344835a/361524aabc7e49fab7bcdc69f7ddc7b1/FLAG086875a22 [2020-10-29 09:37:47,931 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:37:47,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-29 09:37:47,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81344835a/361524aabc7e49fab7bcdc69f7ddc7b1/FLAG086875a22 [2020-10-29 09:37:48,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/81344835a/361524aabc7e49fab7bcdc69f7ddc7b1 [2020-10-29 09:37:48,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:37:48,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:37:48,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:37:48,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:37:48,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:37:48,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:37:48" (1/1) ... [2020-10-29 09:37:48,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d1f84d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48, skipping insertion in model container [2020-10-29 09:37:48,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:37:48" (1/1) ... [2020-10-29 09:37:48,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:37:48,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:37:48,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:37:48,544 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:37:48,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:37:48,578 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:37:48,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48 WrapperNode [2020-10-29 09:37:48,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:37:48,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:37:48,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:37:48,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:37:48,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48" (1/1) ... [2020-10-29 09:37:48,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48" (1/1) ... [2020-10-29 09:37:48,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48" (1/1) ... [2020-10-29 09:37:48,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48" (1/1) ... [2020-10-29 09:37:48,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48" (1/1) ... [2020-10-29 09:37:48,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48" (1/1) ... [2020-10-29 09:37:48,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48" (1/1) ... [2020-10-29 09:37:48,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:37:48,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:37:48,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:37:48,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:37:48,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48" (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 09:37:48,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:37:48,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:37:48,706 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:37:48,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 09:37:48,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:37:48,707 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:37:48,708 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:37:48,708 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:37:48,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:37:48,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 09:37:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:37:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:37:48,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:37:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:37:48,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:37:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:37:48,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:37:49,168 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:37:49,169 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:37:49,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:37:49 BoogieIcfgContainer [2020-10-29 09:37:49,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:37:49,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:37:49,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:37:49,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:37:49,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:37:48" (1/3) ... [2020-10-29 09:37:49,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b17322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:37:49, skipping insertion in model container [2020-10-29 09:37:49,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:37:48" (2/3) ... [2020-10-29 09:37:49,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b17322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:37:49, skipping insertion in model container [2020-10-29 09:37:49,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:37:49" (3/3) ... [2020-10-29 09:37:49,185 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-10-29 09:37:49,200 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:37:49,206 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:37:49,222 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:37:49,267 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:37:49,268 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:37:49,268 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:37:49,268 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:37:49,268 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:37:49,268 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:37:49,268 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:37:49,269 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:37:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-29 09:37:49,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-29 09:37:49,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:49,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:49,340 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:49,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:49,351 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-29 09:37:49,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:49,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668748902] [2020-10-29 09:37:49,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:49,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:49,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:49,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:50,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-29 09:37:50,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:50,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-29 09:37:50,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:50,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:50,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:37:50,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:50,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-29 09:37:50,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-29 09:37:50,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:50,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:50,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:50,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:50,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:50,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 09:37:50,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:50,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:50,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:50,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:50,164 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 09:37:50,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668748902] [2020-10-29 09:37:50,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:37:50,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:37:50,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952169796] [2020-10-29 09:37:50,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 09:37:50,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:50,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 09:37:50,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 09:37:50,192 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-10-29 09:37:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:50,388 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-10-29 09:37:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:37:50,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-29 09:37:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:50,398 INFO L225 Difference]: With dead ends: 35 [2020-10-29 09:37:50,398 INFO L226 Difference]: Without dead ends: 14 [2020-10-29 09:37:50,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:37:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-29 09:37:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-29 09:37:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-29 09:37:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-29 09:37:50,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-29 09:37:50,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:50,445 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-29 09:37:50,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 09:37:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-29 09:37:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-29 09:37:50,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:50,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:50,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:37:50,447 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:50,448 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-29 09:37:50,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:50,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474141863] [2020-10-29 09:37:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:50,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:50,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:50,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:50,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-29 09:37:50,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:50,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 247 [2020-10-29 09:37:50,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:50,715 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:50,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 09:37:50,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:50,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-29 09:37:50,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:50,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:50,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:50,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:50,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:50,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:50,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 09:37:50,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:50,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:50,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:50,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:50,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:50,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:37:50,890 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 09:37:50,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474141863] [2020-10-29 09:37:50,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:50,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 09:37:50,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348738996] [2020-10-29 09:37:50,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:37:50,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:50,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:37:50,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:37:50,909 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-29 09:37:51,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:51,089 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-29 09:37:51,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 09:37:51,090 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-29 09:37:51,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:51,091 INFO L225 Difference]: With dead ends: 21 [2020-10-29 09:37:51,091 INFO L226 Difference]: Without dead ends: 15 [2020-10-29 09:37:51,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:37:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-29 09:37:51,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-29 09:37:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-29 09:37:51,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-29 09:37:51,101 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-29 09:37:51,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:51,101 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-29 09:37:51,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:37:51,101 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-29 09:37:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-29 09:37:51,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:51,102 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:51,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:37:51,103 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:51,104 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-29 09:37:51,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:51,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784771139] [2020-10-29 09:37:51,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:51,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:51,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-29 09:37:51,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:51,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-29 09:37:51,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:51,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:51,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:37:51,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:51,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-29 09:37:51,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:51,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:51,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:51,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:51,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:51,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:37:51,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:51,446 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:51,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:51,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:51,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:51,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784771139] [2020-10-29 09:37:51,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:51,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 09:37:51,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958251037] [2020-10-29 09:37:51,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 09:37:51,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 09:37:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 09:37:51,455 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-29 09:37:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:51,635 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-29 09:37:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 09:37:51,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-29 09:37:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:51,636 INFO L225 Difference]: With dead ends: 22 [2020-10-29 09:37:51,637 INFO L226 Difference]: Without dead ends: 16 [2020-10-29 09:37:51,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-29 09:37:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-29 09:37:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-29 09:37:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-29 09:37:51,644 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-29 09:37:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:51,644 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-29 09:37:51,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 09:37:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-29 09:37:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-29 09:37:51,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:51,645 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:51,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:37:51,645 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-29 09:37:51,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:51,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130368143] [2020-10-29 09:37:51,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:51,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:51,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:51,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-29 09:37:51,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:51,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-29 09:37:51,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:51,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:51,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 09:37:51,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:51,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-29 09:37:51,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:51,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:52,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:52,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:52,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:52,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:52,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:37:52,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:52,010 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:52,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:52,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:52,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:52,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:52,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130368143] [2020-10-29 09:37:52,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:52,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 09:37:52,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356501009] [2020-10-29 09:37:52,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 09:37:52,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:52,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 09:37:52,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-29 09:37:52,018 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-29 09:37:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:52,219 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-29 09:37:52,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 09:37:52,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-29 09:37:52,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:52,221 INFO L225 Difference]: With dead ends: 23 [2020-10-29 09:37:52,221 INFO L226 Difference]: Without dead ends: 17 [2020-10-29 09:37:52,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-29 09:37:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-29 09:37:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-29 09:37:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-29 09:37:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-29 09:37:52,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-29 09:37:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:52,227 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-29 09:37:52,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 09:37:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-29 09:37:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-29 09:37:52,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:52,229 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:52,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:37:52,229 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:52,230 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-29 09:37:52,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:52,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577268348] [2020-10-29 09:37:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:52,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:52,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:52,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:52,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-29 09:37:52,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:52,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-29 09:37:52,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:52,595 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:52,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 09:37:52,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:52,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-29 09:37:52,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:52,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:52,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:52,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:52,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:52,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:52,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:37:52,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:52,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:52,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:52,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:52,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:52,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:52,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577268348] [2020-10-29 09:37:52,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:52,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 09:37:52,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055298733] [2020-10-29 09:37:52,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 09:37:52,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 09:37:52,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-29 09:37:52,740 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2020-10-29 09:37:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:52,988 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-29 09:37:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 09:37:52,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-29 09:37:52,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:52,989 INFO L225 Difference]: With dead ends: 24 [2020-10-29 09:37:52,990 INFO L226 Difference]: Without dead ends: 18 [2020-10-29 09:37:52,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-29 09:37:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-29 09:37:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-29 09:37:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-29 09:37:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-29 09:37:52,996 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-29 09:37:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:52,997 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-29 09:37:52,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 09:37:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-29 09:37:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-29 09:37:52,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:52,998 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:52,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:37:52,998 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-29 09:37:52,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:53,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393212703] [2020-10-29 09:37:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:53,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:53,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:53,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:53,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-29 09:37:53,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:37:53,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-29 09:37:53,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:53,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:53,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-29 09:37:53,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 09:37:53,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 09:37:53,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:37:53,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:37:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:37:53,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:37:53,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:37:53,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:37:53,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:37:53,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:37:53,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:37:53,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:37:53,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:37:53,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:37:53,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:37:53,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:37:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:37:53,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393212703] [2020-10-29 09:37:53,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 09:37:53,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-29 09:37:53,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410901225] [2020-10-29 09:37:53,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-29 09:37:53,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:37:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-29 09:37:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-29 09:37:53,443 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 11 states. [2020-10-29 09:37:53,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:37:53,781 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-29 09:37:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 09:37:53,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2020-10-29 09:37:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:37:53,782 INFO L225 Difference]: With dead ends: 25 [2020-10-29 09:37:53,783 INFO L226 Difference]: Without dead ends: 19 [2020-10-29 09:37:53,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-29 09:37:53,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-29 09:37:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-29 09:37:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-29 09:37:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-29 09:37:53,790 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-29 09:37:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:37:53,790 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-29 09:37:53,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-29 09:37:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-29 09:37:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-29 09:37:53,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:37:53,791 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:37:53,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:37:53,792 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:37:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:37:53,792 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-29 09:37:53,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:37:53,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566641819] [2020-10-29 09:37:53,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:37:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:37:53,805 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:37:53,810 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:37:53,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:37:53,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:37:53 BoogieIcfgContainer [2020-10-29 09:37:53,835 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:37:53,840 INFO L168 Benchmark]: Toolchain (without parser) took 5520.16 ms. Allocated memory was 152.0 MB in the beginning and 195.0 MB in the end (delta: 43.0 MB). Free memory was 128.0 MB in the beginning and 70.6 MB in the end (delta: 57.5 MB). Peak memory consumption was 101.2 MB. Max. memory is 8.0 GB. [2020-10-29 09:37:53,841 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:37:53,847 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.80 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 118.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-29 09:37:53,848 INFO L168 Benchmark]: Boogie Preprocessor took 32.98 ms. Allocated memory is still 152.0 MB. Free memory was 118.3 MB in the beginning and 116.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:37:53,849 INFO L168 Benchmark]: RCFGBuilder took 557.75 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 104.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-29 09:37:53,850 INFO L168 Benchmark]: TraceAbstraction took 4658.95 ms. Allocated memory was 152.0 MB in the beginning and 195.0 MB in the end (delta: 43.0 MB). Free memory was 103.9 MB in the beginning and 70.6 MB in the end (delta: 33.4 MB). Peak memory consumption was 77.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:37:53,861 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 152.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.80 ms. Allocated memory is still 152.0 MB. Free memory was 127.4 MB in the beginning and 118.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.98 ms. Allocated memory is still 152.0 MB. Free memory was 118.3 MB in the beginning and 116.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 557.75 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 104.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4658.95 ms. Allocated memory was 152.0 MB in the beginning and 195.0 MB in the end (delta: 43.0 MB). Free memory was 103.9 MB in the beginning and 70.6 MB in the end (delta: 33.4 MB). Peak memory consumption was 77.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND FALSE !(x < 6) [L21] CALL __VERIFIER_assert(x != 6) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "underapprox_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 40 SDslu, 181 SDs, 0 SdLazy, 291 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.4s 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 6675 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35 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 incorrect! Received shutdown request...