/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_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:48:15,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:48:15,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:48:15,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:48:15,920 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:48:15,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:48:15,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:48:15,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:48:15,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:48:15,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:48:15,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:48:15,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:48:15,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:48:15,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:48:15,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:48:15,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:48:15,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:48:15,933 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:48:15,938 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:48:15,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:48:15,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:48:15,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:48:15,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:48:15,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:48:15,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:48:15,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:48:15,952 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:48:15,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:48:15,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:48:15,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:48:15,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:48:15,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:48:15,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:48:15,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:48:15,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:48:15,957 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:48:15,958 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:48:15,958 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:48:15,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:48:15,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:48:15,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:48:15,960 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 23:48:15,984 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:48:15,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:48:15,985 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:48:15,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:48:15,986 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:48:15,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:48:15,986 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:48:15,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:48:15,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:48:15,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:48:15,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:48:15,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:48:15,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:48:15,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:48:15,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:48:15,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:48:15,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:48:15,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:48:15,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:48:15,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:48:15,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:48:15,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:48:15,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:48:15,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:48:15,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:48:15,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:48:15,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:48:15,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:48:15,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:48:15,990 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 23:48:16,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:48:16,299 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:48:16,303 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:48:16,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:48:16,307 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:48:16,308 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-14 23:48:16,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c2698e92/cc4eacdff8a842e8b8054ff1917744d0/FLAGd68d43644 [2020-10-14 23:48:16,864 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:48:16,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2020-10-14 23:48:16,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c2698e92/cc4eacdff8a842e8b8054ff1917744d0/FLAGd68d43644 [2020-10-14 23:48:17,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2c2698e92/cc4eacdff8a842e8b8054ff1917744d0 [2020-10-14 23:48:17,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:48:17,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:48:17,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:48:17,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:48:17,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:48:17,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:48:17" (1/1) ... [2020-10-14 23:48:17,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b22a6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17, skipping insertion in model container [2020-10-14 23:48:17,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:48:17" (1/1) ... [2020-10-14 23:48:17,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:48:17,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:48:17,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:48:17,517 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:48:17,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:48:17,547 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:48:17,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17 WrapperNode [2020-10-14 23:48:17,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:48:17,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:48:17,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:48:17,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:48:17,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17" (1/1) ... [2020-10-14 23:48:17,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17" (1/1) ... [2020-10-14 23:48:17,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17" (1/1) ... [2020-10-14 23:48:17,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17" (1/1) ... [2020-10-14 23:48:17,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17" (1/1) ... [2020-10-14 23:48:17,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17" (1/1) ... [2020-10-14 23:48:17,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17" (1/1) ... [2020-10-14 23:48:17,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:48:17,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:48:17,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:48:17,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:48:17,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17" (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 23:48:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:48:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:48:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:48:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:48:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:48:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:48:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:48:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:48:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:48:17,890 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:48:17,890 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 23:48:17,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:48:17 BoogieIcfgContainer [2020-10-14 23:48:17,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:48:17,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:48:17,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:48:17,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:48:17,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:48:17" (1/3) ... [2020-10-14 23:48:17,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b34f58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:48:17, skipping insertion in model container [2020-10-14 23:48:17,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:48:17" (2/3) ... [2020-10-14 23:48:17,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b34f58e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:48:17, skipping insertion in model container [2020-10-14 23:48:17,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:48:17" (3/3) ... [2020-10-14 23:48:17,910 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2020-10-14 23:48:17,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:48:17,926 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:48:17,941 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:48:17,962 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:48:17,962 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:48:17,962 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:48:17,963 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:48:17,963 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:48:17,963 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:48:17,963 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:48:17,963 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:48:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-14 23:48:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 23:48:17,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:17,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:17,987 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:17,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-10-14 23:48:17,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:17,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147889991] [2020-10-14 23:48:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:18,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:18,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:18,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:18,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 23:48:18,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:18,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-14 23:48:18,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:18,262 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:18,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:48:18,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:18,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:48:18,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 23:48:18,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:18,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:18,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:18,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:18,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:48:18,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:18,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:18,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:18,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:18,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:18,390 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 23:48:18,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147889991] [2020-10-14 23:48:18,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:48:18,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 23:48:18,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002040621] [2020-10-14 23:48:18,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:48:18,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:18,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:48:18,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:48:18,417 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-10-14 23:48:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:18,468 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-10-14 23:48:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:48:18,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-14 23:48:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:18,479 INFO L225 Difference]: With dead ends: 29 [2020-10-14 23:48:18,480 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 23:48:18,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:48:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 23:48:18,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 23:48:18,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 23:48:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-14 23:48:18,534 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-14 23:48:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:18,535 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-14 23:48:18,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:48:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-14 23:48:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 23:48:18,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:18,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:18,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:48:18,537 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-10-14 23:48:18,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:18,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895935927] [2020-10-14 23:48:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:18,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:18,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:18,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:18,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 23:48:18,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:18,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 290 [2020-10-14 23:48:18,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:18,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:48:18,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:18,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:48:18,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:18,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:18,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:18,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:18,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:18,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:18,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:18,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:18,923 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:18,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:18,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:18,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:18,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:18,927 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 23:48:18,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895935927] [2020-10-14 23:48:18,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:18,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:48:18,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403213644] [2020-10-14 23:48:18,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:48:18,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:18,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:48:18,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:48:18,931 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-10-14 23:48:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:18,960 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-14 23:48:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:48:18,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-14 23:48:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:18,962 INFO L225 Difference]: With dead ends: 18 [2020-10-14 23:48:18,962 INFO L226 Difference]: Without dead ends: 13 [2020-10-14 23:48:18,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:48:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-14 23:48:18,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-14 23:48:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 23:48:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-14 23:48:18,968 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-14 23:48:18,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:18,968 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-14 23:48:18,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:48:18,968 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-14 23:48:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 23:48:18,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:18,969 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:18,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:48:18,970 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2020-10-14 23:48:18,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:18,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448364001] [2020-10-14 23:48:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:18,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:19,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 23:48:19,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:19,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-14 23:48:19,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:19,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:19,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:48:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:48:19,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:48:19,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:19,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:19,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:19,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:19,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 23:48:19,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:19,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:19,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:19,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:19,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:19,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:19,209 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 23:48:19,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448364001] [2020-10-14 23:48:19,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:19,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:48:19,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690914383] [2020-10-14 23:48:19,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:48:19,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:19,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:48:19,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:48:19,212 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-10-14 23:48:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:19,254 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-10-14 23:48:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:48:19,255 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-10-14 23:48:19,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:19,256 INFO L225 Difference]: With dead ends: 19 [2020-10-14 23:48:19,256 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 23:48:19,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:48:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 23:48:19,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 23:48:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 23:48:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-14 23:48:19,265 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-14 23:48:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:19,265 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-14 23:48:19,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:48:19,266 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-14 23:48:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-14 23:48:19,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:19,266 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:19,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:48:19,267 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:19,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2020-10-14 23:48:19,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:19,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619548728] [2020-10-14 23:48:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:19,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:19,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-14 23:48:19,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:19,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-14 23:48:19,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:19,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:19,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:48:19,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:19,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:48:19,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:19,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:19,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:19,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:19,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:19,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:19,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:19,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:19,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:19,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:19,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:19,545 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 23:48:19,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619548728] [2020-10-14 23:48:19,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:19,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:48:19,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410331381] [2020-10-14 23:48:19,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:48:19,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:19,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:48:19,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:48:19,548 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2020-10-14 23:48:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:19,586 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-14 23:48:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:48:19,587 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-10-14 23:48:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:19,588 INFO L225 Difference]: With dead ends: 20 [2020-10-14 23:48:19,588 INFO L226 Difference]: Without dead ends: 15 [2020-10-14 23:48:19,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:48:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-14 23:48:19,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-14 23:48:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 23:48:19,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-14 23:48:19,594 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-14 23:48:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:19,594 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-14 23:48:19,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:48:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-14 23:48:19,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:48:19,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:19,595 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:19,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:48:19,596 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:19,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:19,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2020-10-14 23:48:19,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:19,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219422628] [2020-10-14 23:48:19,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:19,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:19,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:48:19,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:19,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-14 23:48:19,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:19,735 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:19,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:48:19,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:19,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:48:19,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:19,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:19,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:19,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:19,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:19,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:19,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:19,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:19,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:19,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:19,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:19,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:19,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:19,893 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 23:48:19,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219422628] [2020-10-14 23:48:19,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:19,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:48:19,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737383054] [2020-10-14 23:48:19,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:48:19,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:19,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:48:19,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:48:19,896 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 9 states. [2020-10-14 23:48:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:19,959 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-14 23:48:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:48:19,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-14 23:48:19,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:19,961 INFO L225 Difference]: With dead ends: 21 [2020-10-14 23:48:19,961 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 23:48:19,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:48:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 23:48:19,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 23:48:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 23:48:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-14 23:48:19,967 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-14 23:48:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:19,967 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-14 23:48:19,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:48:19,968 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-14 23:48:19,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:48:19,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:19,968 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:19,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:48:19,969 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2020-10-14 23:48:19,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:19,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601567013] [2020-10-14 23:48:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:19,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:20,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:20,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:20,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:48:20,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:48:20,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-14 23:48:20,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:20,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:20,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:48:20,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:48:20,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:48:20,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:20,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:48:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:48:20,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:48:20,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:48:20,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:48:20,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:48:20,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:48:20,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:48:20,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:48:20,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:48:20,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:48:20,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:48:20,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:48:20,299 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 23:48:20,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601567013] [2020-10-14 23:48:20,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:48:20,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:48:20,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002628423] [2020-10-14 23:48:20,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:48:20,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:48:20,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:48:20,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:48:20,302 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 10 states. [2020-10-14 23:48:20,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:48:20,354 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-14 23:48:20,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:48:20,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-10-14 23:48:20,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:48:20,356 INFO L225 Difference]: With dead ends: 22 [2020-10-14 23:48:20,356 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 23:48:20,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:48:20,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 23:48:20,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 23:48:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 23:48:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-14 23:48:20,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-10-14 23:48:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:48:20,362 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-14 23:48:20,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:48:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-14 23:48:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:48:20,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:48:20,363 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:48:20,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:48:20,364 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:48:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:48:20,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2020-10-14 23:48:20,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:48:20,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118813105] [2020-10-14 23:48:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:48:20,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 23:48:20,373 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 23:48:20,373 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 23:48:20,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:48:20,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:48:20 BoogieIcfgContainer [2020-10-14 23:48:20,392 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:48:20,395 INFO L168 Benchmark]: Toolchain (without parser) took 3145.07 ms. Allocated memory was 147.3 MB in the beginning and 243.3 MB in the end (delta: 95.9 MB). Free memory was 104.0 MB in the beginning and 191.5 MB in the end (delta: -87.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:20,396 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-10-14 23:48:20,397 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.49 ms. Allocated memory is still 147.3 MB. Free memory was 103.6 MB in the beginning and 94.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:20,398 INFO L168 Benchmark]: Boogie Preprocessor took 110.51 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 94.4 MB in the beginning and 181.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:20,398 INFO L168 Benchmark]: RCFGBuilder took 235.32 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 170.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:20,399 INFO L168 Benchmark]: TraceAbstraction took 2494.95 ms. Allocated memory was 202.9 MB in the beginning and 243.3 MB in the end (delta: 40.4 MB). Free memory was 170.1 MB in the beginning and 191.5 MB in the end (delta: -21.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-10-14 23:48:20,403 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 147.3 MB. Free memory was 121.9 MB in the beginning and 121.4 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.49 ms. Allocated memory is still 147.3 MB. Free memory was 103.6 MB in the beginning and 94.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.51 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 94.4 MB in the beginning and 181.6 MB in the end (delta: -87.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 235.32 ms. Allocated memory is still 202.9 MB. Free memory was 181.6 MB in the beginning and 170.1 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2494.95 ms. Allocated memory was 202.9 MB in the beginning and 243.3 MB in the end (delta: 40.4 MB). Free memory was 170.1 MB in the beginning and 191.5 MB in the end (delta: -21.4 MB). Peak memory consumption was 18.9 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(x != 6) [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: 2.4s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 281 SDs, 0 SdLazy, 155 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s 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, 3559 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...