/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=0.2 --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 -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:48:11,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:48:11,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:48:11,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:48:11,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:48:11,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:48:11,848 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:48:11,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:48:11,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:48:11,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:48:11,853 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:48:11,855 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:48:11,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:48:11,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:48:11,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:48:11,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:48:11,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:48:11,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:48:11,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:48:11,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:48:11,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:48:11,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:48:11,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:48:11,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:48:11,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:48:11,871 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:48:11,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:48:11,872 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:48:11,872 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:48:11,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:48:11,873 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:48:11,874 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:48:11,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:48:11,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:48:11,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:48:11,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:48:11,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:48:11,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:48:11,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:48:11,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:48:11,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:48:11,880 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 [2020-10-14 23:48:11,905 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:48:11,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:48:11,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:48:11,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:48:11,907 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:48:11,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:48:11,907 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:48:11,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:48:11,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:48:11,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:48:11,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:48:11,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:48:11,908 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:48:11,909 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:48:11,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:48:11,909 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:48:11,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:48:11,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:48:11,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:48:11,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:48:11,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:48:11,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:48:11,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:48:11,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:48:11,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:48:11,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:48:11,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:48:11,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:48:11,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:48:11,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> 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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=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=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:48:12,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:48:12,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:48:12,252 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:48:12,254 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:48:12,254 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:48:12,255 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-10-14 23:48:12,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5556ad964/07592b317f5a4a3695e4a8d26fe6db88/FLAG8061320f1 [2020-10-14 23:48:12,757 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:48:12,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-10-14 23:48:12,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5556ad964/07592b317f5a4a3695e4a8d26fe6db88/FLAG8061320f1 [2020-10-14 23:48:13,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5556ad964/07592b317f5a4a3695e4a8d26fe6db88 [2020-10-14 23:48:13,185 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:48:13,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:48:13,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:48:13,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:48:13,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:48:13,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:48:13" (1/1) ... [2020-10-14 23:48:13,197 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dadf5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13, skipping insertion in model container [2020-10-14 23:48:13,197 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:48:13" (1/1) ... [2020-10-14 23:48:13,205 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:48:13,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:48:13,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:48:13,438 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:48:13,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:48:13,469 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:48:13,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13 WrapperNode [2020-10-14 23:48:13,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:48:13,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:48:13,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:48:13,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:48:13,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13" (1/1) ... [2020-10-14 23:48:13,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13" (1/1) ... [2020-10-14 23:48:13,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13" (1/1) ... [2020-10-14 23:48:13,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13" (1/1) ... [2020-10-14 23:48:13,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13" (1/1) ... [2020-10-14 23:48:13,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13" (1/1) ... [2020-10-14 23:48:13,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13" (1/1) ... [2020-10-14 23:48:13,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:48:13,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:48:13,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:48:13,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:48:13,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:48:13,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:48:13,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:48:13,667 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:48:13,668 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:48:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:48:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:48:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:48:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:48:13,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:48:13,833 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:48:13,833 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:48:13,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:48:13 BoogieIcfgContainer [2020-10-14 23:48:13,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:48:13,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:48:13,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:48:13,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:48:13,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:48:13" (1/3) ... [2020-10-14 23:48:13,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d26714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:48:13, skipping insertion in model container [2020-10-14 23:48:13,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:13" (2/3) ... [2020-10-14 23:48:13,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d26714 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:48:13, skipping insertion in model container [2020-10-14 23:48:13,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:48:13" (3/3) ... [2020-10-14 23:48:13,845 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-10-14 23:48:13,855 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:48:13,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:48:13,876 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:48:13,897 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:48:13,897 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:48:13,897 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:48:13,898 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:48:13,898 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:48:13,898 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:48:13,898 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:48:13,898 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:48:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-14 23:48:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:48:13,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:13,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:13,923 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-14 23:48:13,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:13,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212459979] [2020-10-14 23:48:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:14,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:14,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:14,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:14,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:48:14,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:14,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-14 23:48:14,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:14,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:14,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:48:14,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:14,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:48:14,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-14 23:48:14,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:14,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:14,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:14,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:14,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:14,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:48:14,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:14,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:14,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:14,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:14,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:14,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:48:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:48:14,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212459979] [2020-10-14 23:48:14,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:48:14,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:48:14,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424277694] [2020-10-14 23:48:14,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:48:14,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:14,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:48:14,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:48:14,440 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-10-14 23:48:14,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:14,575 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-10-14 23:48:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:48:14,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-14 23:48:14,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:14,586 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:48:14,587 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 23:48:14,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:48:14,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 23:48:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 23:48:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 23:48:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-14 23:48:14,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-14 23:48:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:14,625 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-14 23:48:14,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:48:14,625 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-14 23:48:14,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 23:48:14,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:14,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:14,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:48:14,627 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-14 23:48:14,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:14,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32699192] [2020-10-14 23:48:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:14,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:14,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:14,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 23:48:14,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:14,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-14 23:48:14,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:14,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:14,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:48:14,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:14,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:48:14,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:48:14,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:14,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:14,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:14,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:14,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:14,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 23:48:14,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:14,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:14,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:14,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:14,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:14,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:48:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:48:14,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32699192] [2020-10-14 23:48:14,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:14,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:48:14,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674833868] [2020-10-14 23:48:14,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:48:14,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:14,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:48:14,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:48:14,977 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-10-14 23:48:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:15,013 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-14 23:48:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:48:15,014 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-14 23:48:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:15,015 INFO L225 Difference]: With dead ends: 18 [2020-10-14 23:48:15,015 INFO L226 Difference]: Without dead ends: 13 [2020-10-14 23:48:15,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:48:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-14 23:48:15,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-14 23:48:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 23:48:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-14 23:48:15,022 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-14 23:48:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:15,022 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-14 23:48:15,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:48:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-14 23:48:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:48:15,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:15,023 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:15,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:48:15,024 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:15,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-14 23:48:15,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:15,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739881325] [2020-10-14 23:48:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:15,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:15,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:48:15,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:15,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-14 23:48:15,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:15,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:15,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:48:15,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:15,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:48:15,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:15,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:15,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:15,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:15,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:15,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:15,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:15,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:15,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:15,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:15,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:15,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:48:15,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739881325] [2020-10-14 23:48:15,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:15,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:48:15,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346742619] [2020-10-14 23:48:15,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:48:15,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:15,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:48:15,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:48:15,286 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-10-14 23:48:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:15,329 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-14 23:48:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:48:15,329 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-14 23:48:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:15,330 INFO L225 Difference]: With dead ends: 19 [2020-10-14 23:48:15,330 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 23:48:15,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:48:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 23:48:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 23:48:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:48:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-14 23:48:15,336 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-14 23:48:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:15,337 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-14 23:48:15,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:48:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-14 23:48:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:48:15,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:15,338 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:15,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:48:15,338 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-14 23:48:15,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:15,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193675773] [2020-10-14 23:48:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:15,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:15,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:48:15,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:15,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-14 23:48:15,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:15,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:15,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:48:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:15,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:48:15,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:15,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:15,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:15,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:15,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:15,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:15,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:15,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:15,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:15,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:15,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:15,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:48:15,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193675773] [2020-10-14 23:48:15,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:15,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:48:15,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549911729] [2020-10-14 23:48:15,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:48:15,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:15,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:48:15,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:48:15,642 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-10-14 23:48:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:15,689 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-14 23:48:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:48:15,690 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-14 23:48:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:15,691 INFO L225 Difference]: With dead ends: 20 [2020-10-14 23:48:15,691 INFO L226 Difference]: Without dead ends: 15 [2020-10-14 23:48:15,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:48:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-14 23:48:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-14 23:48:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:48:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-14 23:48:15,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-14 23:48:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:15,697 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-14 23:48:15,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:48:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-14 23:48:15,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:48:15,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:15,698 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:15,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:48:15,698 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:15,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-14 23:48:15,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:15,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771100972] [2020-10-14 23:48:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:15,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:15,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:48:15,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:15,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-14 23:48:15,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:15,835 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:15,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:48:15,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:15,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:48:15,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:15,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:15,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:15,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:15,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:15,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:15,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:15,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:15,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:15,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:15,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:48:15,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771100972] [2020-10-14 23:48:15,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:15,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:48:15,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177679250] [2020-10-14 23:48:15,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:48:15,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:48:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:48:15,957 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-10-14 23:48:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:16,007 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-14 23:48:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:48:16,008 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-14 23:48:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:16,009 INFO L225 Difference]: With dead ends: 21 [2020-10-14 23:48:16,009 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:48:16,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:48:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:48:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 23:48:16,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 23:48:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-14 23:48:16,015 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-14 23:48:16,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:16,015 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-14 23:48:16,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:48:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-14 23:48:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:48:16,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:16,016 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:16,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:48:16,017 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:16,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-14 23:48:16,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:16,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982964023] [2020-10-14 23:48:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:16,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:16,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:16,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:16,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:48:16,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:16,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-14 23:48:16,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:16,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:48:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:16,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:48:16,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:16,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:16,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:16,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:16,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:16,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:16,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:16,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:16,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:16,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:16,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:16,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:16,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:48:16,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982964023] [2020-10-14 23:48:16,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:16,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:48:16,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690334764] [2020-10-14 23:48:16,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:48:16,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:16,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:48:16,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:48:16,352 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-10-14 23:48:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:16,431 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-14 23:48:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:48:16,432 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-10-14 23:48:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:16,433 INFO L225 Difference]: With dead ends: 22 [2020-10-14 23:48:16,433 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 23:48:16,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:48:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 23:48:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 23:48:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:48:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 23:48:16,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-14 23:48:16,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:16,440 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 23:48:16,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:48:16,440 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 23:48:16,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:48:16,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:16,441 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:16,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:48:16,442 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:16,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:16,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2020-10-14 23:48:16,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:16,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506473285] [2020-10-14 23:48:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 23:48:16,453 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 23:48:16,453 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 23:48:16,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:48:16,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:48:16 BoogieIcfgContainer [2020-10-14 23:48:16,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:48:16,480 INFO L168 Benchmark]: Toolchain (without parser) took 3292.58 ms. Allocated memory was 147.8 MB in the beginning and 242.2 MB in the end (delta: 94.4 MB). Free memory was 104.5 MB in the beginning and 183.8 MB in the end (delta: -79.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:16,481 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-14 23:48:16,482 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.28 ms. Allocated memory is still 147.8 MB. Free memory was 104.1 MB in the beginning and 94.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:16,483 INFO L168 Benchmark]: Boogie Preprocessor took 120.49 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 94.6 MB in the beginning and 182.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:16,484 INFO L168 Benchmark]: RCFGBuilder took 244.83 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 171.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:16,485 INFO L168 Benchmark]: TraceAbstraction took 2639.47 ms. Allocated memory was 203.9 MB in the beginning and 242.2 MB in the end (delta: 38.3 MB). Free memory was 171.1 MB in the beginning and 183.8 MB in the end (delta: -12.7 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:16,489 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.0 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.28 ms. Allocated memory is still 147.8 MB. Free memory was 104.1 MB in the beginning and 94.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 120.49 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 94.6 MB in the beginning and 182.6 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.83 ms. Allocated memory is still 203.9 MB. Free memory was 182.6 MB in the beginning and 171.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2639.47 ms. Allocated memory was 203.9 MB in the beginning and 242.2 MB in the end (delta: 38.3 MB). Free memory was 171.1 MB in the beginning and 183.8 MB in the end (delta: -12.7 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 [L14] COND FALSE !(x < 6) [L19] CALL __VERIFIER_assert(y != 64) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 11 SDslu, 280 SDs, 0 SdLazy, 166 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 3631 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...