/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=SHALLOWEST --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_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:34:17,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:34:17,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:34:17,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:34:17,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:34:17,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:34:17,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:34:17,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:34:17,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:34:17,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:34:17,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:34:17,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:34:17,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:34:17,094 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:34:17,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:34:17,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:34:17,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:34:17,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:34:17,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:34:17,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:34:17,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:34:17,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:34:17,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:34:17,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:34:17,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:34:17,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:34:17,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:34:17,145 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:34:17,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:34:17,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:34:17,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:34:17,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:34:17,152 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:34:17,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:34:17,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:34:17,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:34:17,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:34:17,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:34:17,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:34:17,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:34:17,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:34:17,166 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 [2020-10-27 01:34:17,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:34:17,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:34:17,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:34:17,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:34:17,222 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:34:17,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:34:17,223 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:34:17,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:34:17,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:34:17,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:34:17,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:34:17,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:34:17,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:34:17,225 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:34:17,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:34:17,226 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:34:17,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:34:17,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:34:17,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:34:17,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:34:17,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:34:17,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:34:17,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:34:17,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:34:17,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:34:17,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:34:17,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:34:17,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:34:17,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:34:17,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:34:17,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:34:17,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:34:17,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:34:17,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:34:17,657 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:34:17,658 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-10-27 01:34:17,747 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50791079e/3a130401f55246f5b2bc630c54179067/FLAG217b770dc [2020-10-27 01:34:18,436 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:34:18,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-10-27 01:34:18,444 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50791079e/3a130401f55246f5b2bc630c54179067/FLAG217b770dc [2020-10-27 01:34:18,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/50791079e/3a130401f55246f5b2bc630c54179067 [2020-10-27 01:34:18,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:34:18,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:34:18,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:18,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:34:18,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:34:18,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:18" (1/1) ... [2020-10-27 01:34:18,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28086e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:18, skipping insertion in model container [2020-10-27 01:34:18,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:34:18" (1/1) ... [2020-10-27 01:34:18,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:34:18,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:34:19,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:19,038 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:34:19,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:34:19,071 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:34:19,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19 WrapperNode [2020-10-27 01:34:19,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:34:19,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:34:19,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:34:19,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:34:19,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19" (1/1) ... [2020-10-27 01:34:19,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19" (1/1) ... [2020-10-27 01:34:19,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19" (1/1) ... [2020-10-27 01:34:19,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19" (1/1) ... [2020-10-27 01:34:19,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19" (1/1) ... [2020-10-27 01:34:19,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19" (1/1) ... [2020-10-27 01:34:19,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19" (1/1) ... [2020-10-27 01:34:19,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:34:19,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:34:19,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:34:19,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:34:19,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19" (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 [2020-10-27 01:34:19,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:34:19,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:34:19,185 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:34:19,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:34:19,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:34:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:34:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:34:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:34:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:34:19,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:34:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:34:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:34:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:34:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:34:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:34:19,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:34:19,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:34:19,425 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:34:19,426 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:34:19,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:19 BoogieIcfgContainer [2020-10-27 01:34:19,428 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:34:19,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:34:19,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:34:19,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:34:19,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:34:18" (1/3) ... [2020-10-27 01:34:19,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a68d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:19, skipping insertion in model container [2020-10-27 01:34:19,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:34:19" (2/3) ... [2020-10-27 01:34:19,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a68d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:34:19, skipping insertion in model container [2020-10-27 01:34:19,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:34:19" (3/3) ... [2020-10-27 01:34:19,440 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-10-27 01:34:19,457 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:34:19,463 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:34:19,481 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:34:19,530 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:34:19,530 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:34:19,530 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:34:19,530 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:34:19,531 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:34:19,531 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:34:19,534 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:34:19,534 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:34:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-27 01:34:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:34:19,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:19,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:19,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:19,627 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-10-27 01:34:19,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:19,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360410279] [2020-10-27 01:34:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:19,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:20,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:20,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:34:20,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:20,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 460 [2020-10-27 01:34:20,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:34:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:20,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:34:20,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:34:20,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:20,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:20,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:20,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:20,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:20,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:34:20,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:20,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:20,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:20,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:20,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:20,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360410279] [2020-10-27 01:34:20,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:34:20,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:34:20,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91703075] [2020-10-27 01:34:20,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:34:20,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:34:20,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:34:20,483 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-10-27 01:34:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:20,773 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-10-27 01:34:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:34:20,775 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-27 01:34:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:20,783 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:34:20,784 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 01:34:20,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:34:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 01:34:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 01:34:20,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 01:34:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 01:34:20,832 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 01:34:20,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:20,832 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 01:34:20,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:34:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 01:34:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:34:20,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:20,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:20,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:34:20,834 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:20,836 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-10-27 01:34:20,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:20,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44343013] [2020-10-27 01:34:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:20,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:20,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:21,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:34:21,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:21,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-27 01:34:21,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:21,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:34:21,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:21,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:34:21,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:34:21,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:21,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:21,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:21,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:21,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:34:21,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:21,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:34:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:21,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44343013] [2020-10-27 01:34:21,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:21,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:34:21,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520603626] [2020-10-27 01:34:21,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:34:21,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:21,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:34:21,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:34:21,391 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2020-10-27 01:34:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:21,589 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-27 01:34:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:34:21,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-27 01:34:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:21,590 INFO L225 Difference]: With dead ends: 21 [2020-10-27 01:34:21,591 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:34:21,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:34:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:34:21,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:34:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:34:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 01:34:21,598 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 01:34:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:21,599 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 01:34:21,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:34:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 01:34:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:34:21,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:21,600 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:21,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:34:21,600 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:21,601 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-10-27 01:34:21,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:21,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003377198] [2020-10-27 01:34:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:21,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:21,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:34:21,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:21,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-27 01:34:21,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:34:21,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:21,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:34:21,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:21,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:21,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:21,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:21,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:21,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:21,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:34:21,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:21,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:21,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:21,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:21,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:34:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:21,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003377198] [2020-10-27 01:34:21,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:21,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:34:21,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46900315] [2020-10-27 01:34:21,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:34:21,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:21,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:34:21,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:34:21,935 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-10-27 01:34:22,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:22,154 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 01:34:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:34:22,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-10-27 01:34:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:22,155 INFO L225 Difference]: With dead ends: 22 [2020-10-27 01:34:22,156 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 01:34:22,156 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 [2020-10-27 01:34:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 01:34:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-27 01:34:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:34:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 01:34:22,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-27 01:34:22,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:22,163 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 01:34:22,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:34:22,163 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 01:34:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:34:22,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:22,164 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:22,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:34:22,164 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:22,165 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-10-27 01:34:22,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:22,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474259271] [2020-10-27 01:34:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:22,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:22,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:34:22,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:22,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 255 [2020-10-27 01:34:22,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:34:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:34:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:22,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:22,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:22,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:22,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:22,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:22,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:22,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:22,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:22,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:22,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474259271] [2020-10-27 01:34:22,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:22,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:34:22,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170241370] [2020-10-27 01:34:22,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:34:22,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:22,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:34:22,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:22,592 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2020-10-27 01:34:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:22,888 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-27 01:34:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:34:22,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-10-27 01:34:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:22,890 INFO L225 Difference]: With dead ends: 23 [2020-10-27 01:34:22,890 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 01:34:22,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:34:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 01:34:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-27 01:34:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:34:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 01:34:22,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-27 01:34:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:22,896 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 01:34:22,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:34:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 01:34:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:34:22,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:22,897 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:22,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:34:22,898 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:22,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:22,898 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-10-27 01:34:22,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:22,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304406586] [2020-10-27 01:34:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:22,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:22,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:23,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:23,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 01:34:23,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:23,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 300 [2020-10-27 01:34:23,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:23,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:34:23,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:23,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:34:23,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:23,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:23,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:23,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:23,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:23,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:23,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:23,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:23,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:23,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:23,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:23,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:23,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304406586] [2020-10-27 01:34:23,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:23,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:34:23,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076215471] [2020-10-27 01:34:23,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:34:23,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:23,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:34:23,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:34:23,380 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 10 states. [2020-10-27 01:34:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:23,720 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 01:34:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:34:23,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-27 01:34:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:23,722 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:34:23,722 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:34:23,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:34:23,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:34:23,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-27 01:34:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 01:34:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 01:34:23,729 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-10-27 01:34:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:23,729 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 01:34:23,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:34:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 01:34:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:34:23,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:23,730 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:23,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:34:23,731 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:23,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:23,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-10-27 01:34:23,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:23,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883848120] [2020-10-27 01:34:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:23,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:23,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:24,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:24,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:34:24,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:34:24,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 302 [2020-10-27 01:34:24,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:24,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:34:24,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:34:24,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:34:24,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:24,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:34:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:34:24,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:34:24,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:34:24,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:34:24,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:34:24,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:34:24,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:34:24,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:34:24,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:34:24,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:34:24,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:34:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:34:24,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883848120] [2020-10-27 01:34:24,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:34:24,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:34:24,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113262793] [2020-10-27 01:34:24,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:34:24,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:34:24,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:34:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:34:24,191 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 9 states. [2020-10-27 01:34:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:34:24,478 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-27 01:34:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:34:24,479 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-27 01:34:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:34:24,480 INFO L225 Difference]: With dead ends: 25 [2020-10-27 01:34:24,480 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 01:34:24,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:34:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 01:34:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-27 01:34:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:34:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 01:34:24,487 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-10-27 01:34:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:34:24,488 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 01:34:24,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:34:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 01:34:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:34:24,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:34:24,489 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:34:24,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:34:24,489 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:34:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:34:24,490 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-10-27 01:34:24,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:34:24,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55971588] [2020-10-27 01:34:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:34:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:34:24,505 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:34:24,505 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:34:24,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:34:24,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:34:24 BoogieIcfgContainer [2020-10-27 01:34:24,526 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:34:24,529 INFO L168 Benchmark]: Toolchain (without parser) took 5709.33 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 130.4 MB in the beginning and 72.9 MB in the end (delta: 57.4 MB). Peak memory consumption was 89.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:24,530 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 155.2 MB. Free memory was 126.9 MB in the beginning and 126.8 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:34:24,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.45 ms. Allocated memory is still 155.2 MB. Free memory was 129.8 MB in the beginning and 120.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:24,532 INFO L168 Benchmark]: Boogie Preprocessor took 34.60 ms. Allocated memory is still 155.2 MB. Free memory was 120.3 MB in the beginning and 119.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:24,532 INFO L168 Benchmark]: RCFGBuilder took 320.24 ms. Allocated memory is still 155.2 MB. Free memory was 118.9 MB in the beginning and 107.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:24,533 INFO L168 Benchmark]: TraceAbstraction took 5095.73 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 106.6 MB in the beginning and 72.9 MB in the end (delta: 33.7 MB). Peak memory consumption was 65.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:34:24,537 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 155.2 MB. Free memory was 126.9 MB in the beginning and 126.8 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.45 ms. Allocated memory is still 155.2 MB. Free memory was 129.8 MB in the beginning and 120.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.60 ms. Allocated memory is still 155.2 MB. Free memory was 120.3 MB in the beginning and 119.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 320.24 ms. Allocated memory is still 155.2 MB. Free memory was 118.9 MB in the beginning and 107.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5095.73 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 106.6 MB in the beginning and 72.9 MB in the end (delta: 33.7 MB). Peak memory consumption was 65.6 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(y != 64) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "underapprox_1-1.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: 4.9s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 64 SDslu, 170 SDs, 0 SdLazy, 277 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.7s 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, 0.0s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 81 ConstructedInterpolants, 0 QuantifiedInterpolants, 6603 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...