/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 20:36:49,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 20:36:49,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 20:36:49,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 20:36:49,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 20:36:49,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 20:36:49,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 20:36:49,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 20:36:49,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 20:36:49,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 20:36:49,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 20:36:49,946 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 20:36:49,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 20:36:49,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 20:36:49,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 20:36:49,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 20:36:49,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 20:36:49,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 20:36:49,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 20:36:49,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 20:36:49,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 20:36:49,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 20:36:49,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 20:36:49,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 20:36:49,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 20:36:49,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 20:36:49,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 20:36:49,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 20:36:49,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 20:36:49,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 20:36:49,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 20:36:49,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 20:36:49,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 20:36:49,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 20:36:49,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 20:36:49,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 20:36:49,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 20:36:49,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 20:36:49,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 20:36:49,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 20:36:49,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 20:36:49,993 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 20:36:50,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 20:36:50,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 20:36:50,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 20:36:50,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 20:36:50,022 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 20:36:50,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 20:36:50,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 20:36:50,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 20:36:50,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 20:36:50,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 20:36:50,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 20:36:50,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 20:36:50,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 20:36:50,025 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 20:36:50,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 20:36:50,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 20:36:50,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 20:36:50,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 20:36:50,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 20:36:50,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 20:36:50,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 20:36:50,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:36:50,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 20:36:50,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 20:36:50,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 20:36:50,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 20:36:50,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 20:36:50,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 20:36:50,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 20:36:50,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 20:36:50,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 20:36:50,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 20:36:50,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 20:36:50,414 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 20:36:50,415 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 20:36:50,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2020-10-27 20:36:50,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/900528c0e/f7825c01e7b140808b8c7b4a7ff10e77/FLAG276cd66d2 [2020-10-27 20:36:51,112 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 20:36:51,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-2.i [2020-10-27 20:36:51,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/900528c0e/f7825c01e7b140808b8c7b4a7ff10e77/FLAG276cd66d2 [2020-10-27 20:36:51,461 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/900528c0e/f7825c01e7b140808b8c7b4a7ff10e77 [2020-10-27 20:36:51,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 20:36:51,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 20:36:51,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 20:36:51,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 20:36:51,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 20:36:51,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:36:51" (1/1) ... [2020-10-27 20:36:51,483 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b1bab91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51, skipping insertion in model container [2020-10-27 20:36:51,483 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 08:36:51" (1/1) ... [2020-10-27 20:36:51,493 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 20:36:51,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 20:36:51,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:36:51,671 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 20:36:51,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 20:36:51,702 INFO L208 MainTranslator]: Completed translation [2020-10-27 20:36:51,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51 WrapperNode [2020-10-27 20:36:51,703 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 20:36:51,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 20:36:51,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 20:36:51,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 20:36:51,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51" (1/1) ... [2020-10-27 20:36:51,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51" (1/1) ... [2020-10-27 20:36:51,724 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51" (1/1) ... [2020-10-27 20:36:51,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51" (1/1) ... [2020-10-27 20:36:51,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51" (1/1) ... [2020-10-27 20:36:51,735 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51" (1/1) ... [2020-10-27 20:36:51,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51" (1/1) ... [2020-10-27 20:36:51,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 20:36:51,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 20:36:51,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 20:36:51,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 20:36:51,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 20:36:51,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 20:36:51,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 20:36:51,818 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 20:36:51,818 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 20:36:51,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 20:36:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 20:36:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 20:36:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 20:36:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 20:36:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 20:36:51,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 20:36:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 20:36:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 20:36:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 20:36:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 20:36:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 20:36:51,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 20:36:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 20:36:51,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 20:36:52,077 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 20:36:52,077 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 20:36:52,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:52 BoogieIcfgContainer [2020-10-27 20:36:52,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 20:36:52,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 20:36:52,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 20:36:52,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 20:36:52,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 08:36:51" (1/3) ... [2020-10-27 20:36:52,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a89db03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:52, skipping insertion in model container [2020-10-27 20:36:52,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 08:36:51" (2/3) ... [2020-10-27 20:36:52,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a89db03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 08:36:52, skipping insertion in model container [2020-10-27 20:36:52,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 08:36:52" (3/3) ... [2020-10-27 20:36:52,092 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.i [2020-10-27 20:36:52,116 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 20:36:52,123 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 20:36:52,138 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 20:36:52,166 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 20:36:52,166 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 20:36:52,166 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 20:36:52,167 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 20:36:52,167 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 20:36:52,167 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 20:36:52,167 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 20:36:52,167 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 20:36:52,203 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 20:36:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:36:52,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:52,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:52,211 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:52,220 INFO L82 PathProgramCache]: Analyzing trace with hash 596948892, now seen corresponding path program 1 times [2020-10-27 20:36:52,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:52,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161051172] [2020-10-27 20:36:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:52,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:52,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:36:52,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:52,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-27 20:36:52,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:52,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:52,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 20:36:52,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:52,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:36:52,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:52,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:52,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:52,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:52,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:52,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 20:36:52,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:52,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:52,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:52,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161051172] [2020-10-27 20:36:52,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:52,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 20:36:52,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438536499] [2020-10-27 20:36:52,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 20:36:52,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:52,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 20:36:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:36:52,942 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-27 20:36:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:53,004 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-27 20:36:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 20:36:53,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 20:36:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:53,014 INFO L225 Difference]: With dead ends: 37 [2020-10-27 20:36:53,014 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 20:36:53,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 20:36:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 20:36:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 20:36:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 20:36:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 20:36:53,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-10-27 20:36:53,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:53,059 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 20:36:53,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 20:36:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 20:36:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 20:36:53,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:53,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:53,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 20:36:53,061 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:53,062 INFO L82 PathProgramCache]: Analyzing trace with hash -433105898, now seen corresponding path program 1 times [2020-10-27 20:36:53,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:53,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107958708] [2020-10-27 20:36:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:53,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:53,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 20:36:53,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 20:36:53,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-27 20:36:53,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:53,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 20:36:53,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:53,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 20:36:53,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:36:53,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:53,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:53,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:53,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:53,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 20:36:53,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:53,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 20:36:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:53,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107958708] [2020-10-27 20:36:53,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:53,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 20:36:53,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309111421] [2020-10-27 20:36:53,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 20:36:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 20:36:53,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 20:36:53,331 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2020-10-27 20:36:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:53,404 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 20:36:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 20:36:53,405 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 20:36:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:53,405 INFO L225 Difference]: With dead ends: 24 [2020-10-27 20:36:53,406 INFO L226 Difference]: Without dead ends: 17 [2020-10-27 20:36:53,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:36:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-27 20:36:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-27 20:36:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 20:36:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-27 20:36:53,415 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-10-27 20:36:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:53,416 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-27 20:36:53,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 20:36:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-27 20:36:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 20:36:53,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:53,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:53,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 20:36:53,417 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:53,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1176580852, now seen corresponding path program 1 times [2020-10-27 20:36:53,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:53,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821778949] [2020-10-27 20:36:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:53,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:53,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 20:36:53,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:53,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-27 20:36:53,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:53,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 20:36:53,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:53,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 20:36:53,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 20:36:53,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:53,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:53,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:53,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:53,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:36:53,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:53,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:53,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:53,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:53,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:53,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821778949] [2020-10-27 20:36:53,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:53,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 20:36:53,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814147870] [2020-10-27 20:36:53,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 20:36:53,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:53,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 20:36:53,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 20:36:53,595 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-10-27 20:36:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:53,711 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 20:36:53,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 20:36:53,711 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 20:36:53,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:53,712 INFO L225 Difference]: With dead ends: 26 [2020-10-27 20:36:53,712 INFO L226 Difference]: Without dead ends: 19 [2020-10-27 20:36:53,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:36:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-27 20:36:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-10-27 20:36:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-27 20:36:53,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-10-27 20:36:53,720 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2020-10-27 20:36:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:53,720 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-10-27 20:36:53,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 20:36:53,721 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-10-27 20:36:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 20:36:53,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:53,722 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:53,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 20:36:53,722 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:53,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1897321042, now seen corresponding path program 2 times [2020-10-27 20:36:53,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:53,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047183920] [2020-10-27 20:36:53,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:53,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:53,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 20:36:53,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:53,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-27 20:36:53,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:53,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 20:36:53,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:53,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 20:36:53,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:36:53,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:53,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:53,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:53,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:53,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:53,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:36:53,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:53,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:53,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:53,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:53,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:53,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047183920] [2020-10-27 20:36:53,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:53,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 20:36:53,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615288896] [2020-10-27 20:36:53,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 20:36:53,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 20:36:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 20:36:53,869 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2020-10-27 20:36:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:53,992 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 20:36:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 20:36:53,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-27 20:36:53,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:53,993 INFO L225 Difference]: With dead ends: 28 [2020-10-27 20:36:53,993 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 20:36:53,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:36:53,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 20:36:53,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 20:36:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 20:36:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-10-27 20:36:54,000 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2020-10-27 20:36:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:54,001 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-10-27 20:36:54,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 20:36:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-10-27 20:36:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 20:36:54,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:54,002 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:54,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 20:36:54,002 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:54,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:54,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1256058320, now seen corresponding path program 3 times [2020-10-27 20:36:54,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:54,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701251527] [2020-10-27 20:36:54,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:54,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:54,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 20:36:54,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:54,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-27 20:36:54,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 20:36:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:54,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 20:36:54,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:54,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:54,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:54,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:54,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:54,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:36:54,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:54,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:54,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:54,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:54,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:54,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701251527] [2020-10-27 20:36:54,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:54,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 20:36:54,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899891567] [2020-10-27 20:36:54,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 20:36:54,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:54,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 20:36:54,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 20:36:54,140 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-10-27 20:36:54,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:54,296 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 20:36:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 20:36:54,297 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-27 20:36:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:54,298 INFO L225 Difference]: With dead ends: 30 [2020-10-27 20:36:54,298 INFO L226 Difference]: Without dead ends: 23 [2020-10-27 20:36:54,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:36:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-27 20:36:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-27 20:36:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 20:36:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-10-27 20:36:54,305 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2020-10-27 20:36:54,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:54,306 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-10-27 20:36:54,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 20:36:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-10-27 20:36:54,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 20:36:54,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:54,307 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:54,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 20:36:54,307 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:54,308 INFO L82 PathProgramCache]: Analyzing trace with hash 593285774, now seen corresponding path program 4 times [2020-10-27 20:36:54,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:54,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956965386] [2020-10-27 20:36:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:54,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:54,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 20:36:54,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:54,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 20:36:54,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:54,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 20:36:54,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 20:36:54,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:54,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:54,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:54,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:54,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:54,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:36:54,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:54,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:54,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:54,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:54,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:54,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956965386] [2020-10-27 20:36:54,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:54,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 20:36:54,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323535074] [2020-10-27 20:36:54,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 20:36:54,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:54,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 20:36:54,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 20:36:54,545 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2020-10-27 20:36:54,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:54,750 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 20:36:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 20:36:54,751 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 20:36:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:54,752 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:36:54,752 INFO L226 Difference]: Without dead ends: 25 [2020-10-27 20:36:54,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 20:36:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-27 20:36:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-27 20:36:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-27 20:36:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-10-27 20:36:54,762 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2020-10-27 20:36:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:54,764 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-10-27 20:36:54,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 20:36:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-10-27 20:36:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 20:36:54,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:54,766 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:54,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 20:36:54,766 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:54,767 INFO L82 PathProgramCache]: Analyzing trace with hash -303500436, now seen corresponding path program 5 times [2020-10-27 20:36:54,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:54,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126784016] [2020-10-27 20:36:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:54,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:54,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 20:36:54,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:54,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 20:36:54,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 20:36:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:54,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 20:36:54,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 20:36:54,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:54,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:54,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:54,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:54,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:54,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:36:54,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:54,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:54,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:54,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:54,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:54,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126784016] [2020-10-27 20:36:54,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:54,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 20:36:54,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221541155] [2020-10-27 20:36:54,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 20:36:54,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:54,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 20:36:54,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 20:36:54,986 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-10-27 20:36:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:55,392 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 20:36:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 20:36:55,393 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-27 20:36:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:55,393 INFO L225 Difference]: With dead ends: 34 [2020-10-27 20:36:55,393 INFO L226 Difference]: Without dead ends: 27 [2020-10-27 20:36:55,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 20:36:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-27 20:36:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-27 20:36:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-27 20:36:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-27 20:36:55,407 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2020-10-27 20:36:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:55,408 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-27 20:36:55,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 20:36:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-27 20:36:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 20:36:55,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:55,411 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:55,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 20:36:55,412 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:55,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:55,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1173378250, now seen corresponding path program 6 times [2020-10-27 20:36:55,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:55,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696669464] [2020-10-27 20:36:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:55,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:55,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:55,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 20:36:55,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:55,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-27 20:36:55,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:55,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 20:36:55,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:55,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 20:36:55,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:55,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:55,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:55,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:55,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:55,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:55,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:36:55,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:55,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:55,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:55,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696669464] [2020-10-27 20:36:55,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:55,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 20:36:55,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262411197] [2020-10-27 20:36:55,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 20:36:55,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:55,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 20:36:55,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 20:36:55,722 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2020-10-27 20:36:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:56,028 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 20:36:56,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 20:36:56,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 20:36:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:56,031 INFO L225 Difference]: With dead ends: 36 [2020-10-27 20:36:56,031 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 20:36:56,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 20:36:56,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 20:36:56,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-27 20:36:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 20:36:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-10-27 20:36:56,038 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2020-10-27 20:36:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:56,039 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-10-27 20:36:56,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 20:36:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-10-27 20:36:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 20:36:56,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:56,040 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:56,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 20:36:56,040 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1180379480, now seen corresponding path program 7 times [2020-10-27 20:36:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:56,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255943869] [2020-10-27 20:36:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:56,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:56,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:56,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 20:36:56,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:56,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-27 20:36:56,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:56,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 20:36:56,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:56,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 20:36:56,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:56,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:56,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:56,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:56,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:56,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:56,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 20:36:56,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:56,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:56,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:56,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:56,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:56,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255943869] [2020-10-27 20:36:56,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:56,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 20:36:56,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508113987] [2020-10-27 20:36:56,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 20:36:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:56,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 20:36:56,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 20:36:56,281 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-10-27 20:36:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:56,620 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-27 20:36:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 20:36:56,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-10-27 20:36:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:56,622 INFO L225 Difference]: With dead ends: 37 [2020-10-27 20:36:56,622 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 20:36:56,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 20:36:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 20:36:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-27 20:36:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 20:36:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-10-27 20:36:56,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2020-10-27 20:36:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:56,629 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-10-27 20:36:56,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 20:36:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-10-27 20:36:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 20:36:56,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:56,630 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:56,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 20:36:56,631 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:56,631 INFO L82 PathProgramCache]: Analyzing trace with hash 306206982, now seen corresponding path program 8 times [2020-10-27 20:36:56,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:56,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068537889] [2020-10-27 20:36:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:56,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:56,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:56,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 20:36:56,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:56,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 20:36:56,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:56,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 20:36:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 20:36:56,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:57,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:57,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:57,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:57,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:57,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:57,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 20:36:57,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:57,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:57,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:57,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068537889] [2020-10-27 20:36:57,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 20:36:57,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 20:36:57,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616817033] [2020-10-27 20:36:57,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 20:36:57,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 20:36:57,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 20:36:57,040 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 14 states. [2020-10-27 20:36:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:57,686 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-27 20:36:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 20:36:57,687 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-27 20:36:57,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:57,688 INFO L225 Difference]: With dead ends: 39 [2020-10-27 20:36:57,688 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 20:36:57,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-27 20:36:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 20:36:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-27 20:36:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-27 20:36:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-27 20:36:57,701 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2020-10-27 20:36:57,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:57,701 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-27 20:36:57,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 20:36:57,702 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-27 20:36:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 20:36:57,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 20:36:57,705 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 20:36:57,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 20:36:57,706 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 20:36:57,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 20:36:57,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1308312604, now seen corresponding path program 9 times [2020-10-27 20:36:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 20:36:57,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396792690] [2020-10-27 20:36:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 20:36:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:57,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:57,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:57,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 20:36:57,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:57,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 20:36:57,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:57,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 20:36:57,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 20:36:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 20:36:57,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:58,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 20:36:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 20:36:58,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 20:36:58,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 20:36:58,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 20:36:58,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 20:36:58,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 20:36:58,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 20:36:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 20:36:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 20:36:58,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 20:36:58,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 20:36:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 20:36:58,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396792690] [2020-10-27 20:36:58,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 20:36:58,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-27 20:36:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983383460] [2020-10-27 20:36:58,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 20:36:58,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 20:36:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 20:36:58,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 20:36:58,035 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2020-10-27 20:36:58,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 20:36:58,316 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 20:36:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 20:36:58,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-10-27 20:36:58,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 20:36:58,317 INFO L225 Difference]: With dead ends: 32 [2020-10-27 20:36:58,317 INFO L226 Difference]: Without dead ends: 0 [2020-10-27 20:36:58,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 20:36:58,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-27 20:36:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-27 20:36:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-27 20:36:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-27 20:36:58,319 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-10-27 20:36:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 20:36:58,319 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-27 20:36:58,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 20:36:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-27 20:36:58,319 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-27 20:36:58,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 20:36:58,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-27 20:36:58,740 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-10-27 20:36:58,745 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2020-10-27 20:36:58,745 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-27 20:36:58,745 INFO L274 CegarLoopResult]: For program point L12-1(line 12) no Hoare annotation was computed. [2020-10-27 20:36:58,745 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-27 20:36:58,745 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-27 20:36:58,746 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:36:58,746 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-27 20:36:58,746 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:36:58,746 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-27 20:36:58,746 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-27 20:36:58,746 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-27 20:36:58,746 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-27 20:36:58,747 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 22 28) the Hoare annotation is: true [2020-10-27 20:36:58,747 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 22 28) no Hoare annotation was computed. [2020-10-27 20:36:58,747 INFO L274 CegarLoopResult]: For program point L24-2(lines 24 26) no Hoare annotation was computed. [2020-10-27 20:36:58,747 INFO L270 CegarLoopResult]: At program point L24-3(lines 24 26) the Hoare annotation is: (or (and (<= main_~i~0 4) (<= 6 main_~sn~0) (<= 4 main_~i~0) (<= main_~sn~0 6)) (and (<= 0 main_~sn~0) (<= 1 main_~i~0) (<= main_~sn~0 0) (<= main_~i~0 1)) (and (<= 7 main_~i~0) (<= main_~i~0 7) (<= 12 main_~sn~0) (<= main_~sn~0 12)) (and (<= main_~sn~0 4) (<= 3 main_~i~0) (<= main_~i~0 3) (<= 4 main_~sn~0)) (and (<= 9 main_~i~0) (<= main_~sn~0 16) (< 15 main_~sn~0)) (and (<= main_~i~0 6) (<= 10 main_~sn~0) (<= main_~sn~0 10) (<= 6 main_~i~0)) (and (<= 2 main_~i~0) (<= main_~sn~0 2) (<= 2 main_~sn~0) (<= main_~i~0 2)) (and (<= main_~sn~0 8) (<= 5 main_~i~0) (<= main_~i~0 5) (<= 8 main_~sn~0)) (and (<= main_~i~0 8) (<= 8 main_~i~0) (<= main_~sn~0 14) (<= 14 main_~sn~0))) [2020-10-27 20:36:58,747 INFO L270 CegarLoopResult]: At program point L24-4(lines 24 26) the Hoare annotation is: (and (<= main_~sn~0 16) (< 15 main_~sn~0)) [2020-10-27 20:36:58,748 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 22 28) no Hoare annotation was computed. [2020-10-27 20:36:58,748 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-27 20:36:58,748 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-10-27 20:36:58,748 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-27 20:36:58,748 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 14 19) the Hoare annotation is: true [2020-10-27 20:36:58,748 INFO L274 CegarLoopResult]: For program point L15-2(lines 14 19) no Hoare annotation was computed. [2020-10-27 20:36:58,748 INFO L274 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 14 19) no Hoare annotation was computed. [2020-10-27 20:36:58,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 08:36:58 BoogieIcfgContainer [2020-10-27 20:36:58,768 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 20:36:58,769 INFO L168 Benchmark]: Toolchain (without parser) took 7303.23 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 125.6 MB in the beginning and 175.4 MB in the end (delta: -49.8 MB). Peak memory consumption was 118.9 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:58,770 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 20:36:58,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.13 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:58,772 INFO L168 Benchmark]: Boogie Preprocessor took 34.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:58,772 INFO L168 Benchmark]: RCFGBuilder took 340.13 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 102.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:58,773 INFO L168 Benchmark]: TraceAbstraction took 6686.50 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 101.7 MB in the beginning and 175.4 MB in the end (delta: -73.7 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. [2020-10-27 20:36:58,777 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 231.13 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.09 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 114.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.13 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 102.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6686.50 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 101.7 MB in the beginning and 175.4 MB in the end (delta: -73.7 MB). Peak memory consumption was 94.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((((((((((i <= 4 && 6 <= sn) && 4 <= i) && sn <= 6) || (((0 <= sn && 1 <= i) && sn <= 0) && i <= 1)) || (((7 <= i && i <= 7) && 12 <= sn) && sn <= 12)) || (((sn <= 4 && 3 <= i) && i <= 3) && 4 <= sn)) || ((9 <= i && sn <= 16) && 15 < sn)) || (((i <= 6 && 10 <= sn) && sn <= 10) && 6 <= i)) || (((2 <= i && sn <= 2) && 2 <= sn) && i <= 2)) || (((sn <= 8 && 5 <= i) && i <= 5) && 8 <= sn)) || (((i <= 8 && 8 <= i) && sn <= 14) && 14 <= sn) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.1s, OverallIterations: 11, TraceHistogramMax: 9, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 167 SDslu, 270 SDs, 0 SdLazy, 589 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=10, 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, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 39 PreInvPairs, 49 NumberOfFragments, 155 HoareAnnotationTreeSize, 39 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 296 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 233 NumberOfCodeBlocks, 233 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 17192 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 81/285 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...