/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:51:14,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:51:14,972 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:51:15,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:51:15,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:51:15,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:51:15,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:51:15,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:51:15,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:51:15,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:51:15,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:51:15,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:51:15,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:51:15,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:51:15,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:51:15,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:51:15,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:51:15,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:51:15,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:51:15,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:51:15,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:51:15,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:51:15,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:51:15,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:51:15,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:51:15,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:51:15,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:51:15,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:51:15,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:51:15,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:51:15,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:51:15,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:51:15,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:51:15,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:51:15,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:51:15,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:51:15,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:51:15,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:51:15,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:51:15,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:51:15,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:51:15,090 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 [2020-10-13 10:51:15,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:51:15,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:51:15,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:51:15,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:51:15,124 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:51:15,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:51:15,124 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:51:15,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:51:15,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:51:15,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:51:15,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:51:15,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:51:15,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:51:15,126 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:51:15,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:51:15,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:51:15,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:51:15,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:51:15,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:51:15,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:51:15,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:51:15,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:51:15,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:51:15,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:51:15,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:51:15,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:51:15,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:51:15,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:51:15,129 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:51:15,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:51:15,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:51:15,436 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:51:15,440 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:51:15,442 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:51:15,442 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:51:15,443 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-10-13 10:51:15,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c1615922/b82be2a8a2ef48248708e84528c83d0b/FLAG5dc5b9ecd [2020-10-13 10:51:15,956 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:51:15,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2020-10-13 10:51:15,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c1615922/b82be2a8a2ef48248708e84528c83d0b/FLAG5dc5b9ecd [2020-10-13 10:51:16,354 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c1615922/b82be2a8a2ef48248708e84528c83d0b [2020-10-13 10:51:16,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:51:16,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:51:16,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:16,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:51:16,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:51:16,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:16" (1/1) ... [2020-10-13 10:51:16,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@263e4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16, skipping insertion in model container [2020-10-13 10:51:16,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:16" (1/1) ... [2020-10-13 10:51:16,382 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:51:16,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:51:16,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:16,570 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:51:16,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:16,602 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:51:16,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16 WrapperNode [2020-10-13 10:51:16,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:16,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:51:16,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:51:16,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:51:16,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16" (1/1) ... [2020-10-13 10:51:16,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16" (1/1) ... [2020-10-13 10:51:16,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16" (1/1) ... [2020-10-13 10:51:16,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16" (1/1) ... [2020-10-13 10:51:16,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16" (1/1) ... [2020-10-13 10:51:16,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16" (1/1) ... [2020-10-13 10:51:16,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16" (1/1) ... [2020-10-13 10:51:16,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:51:16,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:51:16,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:51:16,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:51:16,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16" (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 [2020-10-13 10:51:16,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:51:16,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:51:16,790 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:51:16,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:51:16,791 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:51:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:51:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:51:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:51:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:51:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:51:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:51:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:51:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:51:17,074 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:51:17,078 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:51:17,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:17 BoogieIcfgContainer [2020-10-13 10:51:17,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:51:17,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:51:17,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:51:17,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:51:17,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:51:16" (1/3) ... [2020-10-13 10:51:17,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b396da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:17, skipping insertion in model container [2020-10-13 10:51:17,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:16" (2/3) ... [2020-10-13 10:51:17,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b396da6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:17, skipping insertion in model container [2020-10-13 10:51:17,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:17" (3/3) ... [2020-10-13 10:51:17,109 INFO L109 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2020-10-13 10:51:17,136 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:51:17,144 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:51:17,169 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:51:17,191 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:51:17,191 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:51:17,192 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:51:17,192 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:51:17,192 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:51:17,192 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:51:17,192 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:51:17,192 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:51:17,209 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 10:51:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 10:51:17,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:17,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:17,216 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:17,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times [2020-10-13 10:51:17,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:17,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597714700] [2020-10-13 10:51:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:17,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:17,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 10:51:17,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:17,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-13 10:51:17,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:17,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:17,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:51:17,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:17,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:51:17,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:17,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:17,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:17,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:17,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:51:17,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:17,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:17,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:17,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:17,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:17,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:17,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597714700] [2020-10-13 10:51:17,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:17,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:51:17,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706054988] [2020-10-13 10:51:17,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:51:17,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:51:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:51:17,587 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-10-13 10:51:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:17,613 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2020-10-13 10:51:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:51:17,614 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-10-13 10:51:17,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:17,625 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:51:17,625 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:51:17,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:51:17,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:51:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 10:51:17,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:51:17,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2020-10-13 10:51:17,670 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14 [2020-10-13 10:51:17,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:17,671 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2020-10-13 10:51:17,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:51:17,671 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2020-10-13 10:51:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:51:17,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:17,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:17,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:51:17,673 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:17,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:17,674 INFO L82 PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times [2020-10-13 10:51:17,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:17,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135011836] [2020-10-13 10:51:17,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:17,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:17,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:51:17,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:17,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-13 10:51:17,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:17,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:51:17,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:17,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:51:17,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:17,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:17,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:17,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:17,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:17,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:17,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:17,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:17,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:17,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:17,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135011836] [2020-10-13 10:51:17,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:17,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:51:17,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646781352] [2020-10-13 10:51:17,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:17,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:17,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:17,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:17,830 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states. [2020-10-13 10:51:17,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:17,985 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-13 10:51:17,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:51:17,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 10:51:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:17,988 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:51:17,988 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 10:51:17,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 10:51:17,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-13 10:51:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 10:51:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-13 10:51:18,001 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15 [2020-10-13 10:51:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:18,001 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-13 10:51:18,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-13 10:51:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:51:18,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:18,003 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:18,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:51:18,003 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:18,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:18,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times [2020-10-13 10:51:18,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:18,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913749678] [2020-10-13 10:51:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:51:18,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-13 10:51:18,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:18,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:18,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:51:18,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:18,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:18,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:18,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:18,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:18,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:18,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:51:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:18,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 10:51:18,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:18,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:18,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:51:18,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913749678] [2020-10-13 10:51:18,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:18,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:51:18,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301346391] [2020-10-13 10:51:18,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:51:18,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:18,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:51:18,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:18,246 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states. [2020-10-13 10:51:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:18,399 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2020-10-13 10:51:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:18,400 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 10:51:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:18,401 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:51:18,402 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:51:18,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:51:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-13 10:51:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 10:51:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-10-13 10:51:18,423 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20 [2020-10-13 10:51:18,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:18,424 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-10-13 10:51:18,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:51:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-10-13 10:51:18,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:51:18,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:18,426 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:18,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:51:18,427 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:18,427 INFO L82 PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times [2020-10-13 10:51:18,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:18,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183794559] [2020-10-13 10:51:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:51:18,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-13 10:51:18,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:51:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:18,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:18,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:18,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:18,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:18,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:18,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:18,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 10:51:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:18,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:51:18,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:18,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:18,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:18,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 10:51:18,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 10:51:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:18,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:51:18,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:18,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:18,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:18,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:51:18,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183794559] [2020-10-13 10:51:18,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:18,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 10:51:18,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871389361] [2020-10-13 10:51:18,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:51:18,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:18,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:51:18,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:18,698 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states. [2020-10-13 10:51:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:18,813 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-13 10:51:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:18,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-13 10:51:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:18,816 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:51:18,818 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:51:18,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:18,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:51:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-10-13 10:51:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 10:51:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-13 10:51:18,845 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28 [2020-10-13 10:51:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:18,846 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-13 10:51:18,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:51:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-13 10:51:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:51:18,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:18,849 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:18,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:51:18,849 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times [2020-10-13 10:51:18,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:18,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147940718] [2020-10-13 10:51:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:51:18,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-13 10:51:18,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:51:18,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:18,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:18,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:18,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:18,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:18,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:18,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:18,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:18,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:18,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:18,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:18,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 10:51:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:19,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:19,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:19,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:19,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-13 10:51:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:19,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:19,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:19,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:19,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 10:51:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:19,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:19,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:19,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:19,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:51:19,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147940718] [2020-10-13 10:51:19,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:19,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 10:51:19,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920114776] [2020-10-13 10:51:19,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:51:19,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:19,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:51:19,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:19,034 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states. [2020-10-13 10:51:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:19,213 INFO L93 Difference]: Finished difference Result 70 states and 89 transitions. [2020-10-13 10:51:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:19,214 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-13 10:51:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:19,216 INFO L225 Difference]: With dead ends: 70 [2020-10-13 10:51:19,216 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 10:51:19,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 10:51:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-10-13 10:51:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:51:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2020-10-13 10:51:19,231 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31 [2020-10-13 10:51:19,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:19,232 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2020-10-13 10:51:19,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:51:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2020-10-13 10:51:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:51:19,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:19,233 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:19,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:51:19,234 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:19,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:19,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times [2020-10-13 10:51:19,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:19,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750687189] [2020-10-13 10:51:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:51:19,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:19,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-13 10:51:19,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:51:19,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:51:19,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:51:19,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:19,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:19,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:19,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:19,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 10:51:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:19,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:51:19,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:19,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:19,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:19,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 10:51:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:19,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 10:51:19,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:19,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:51:19,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 10:51:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:19,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:19,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:19,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:19,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:19,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:19,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:19,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:19,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:19,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:51:19,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750687189] [2020-10-13 10:51:19,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:19,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:51:19,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644941958] [2020-10-13 10:51:19,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:51:19,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:19,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:51:19,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:19,667 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 10 states. [2020-10-13 10:51:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:19,915 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-10-13 10:51:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:51:19,916 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-13 10:51:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:19,919 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:51:19,919 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:51:19,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:51:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 10:51:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:51:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-13 10:51:19,932 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33 [2020-10-13 10:51:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:19,933 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-13 10:51:19,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:51:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-13 10:51:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 10:51:19,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:19,935 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:19,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:51:19,936 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times [2020-10-13 10:51:19,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:19,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698521977] [2020-10-13 10:51:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:19,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 10:51:20,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:20,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-13 10:51:20,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:51:20,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:51:20,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:51:20,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:20,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:20,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:20,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:20,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 10:51:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:20,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 10:51:20,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:20,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 10:51:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:20,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:20,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:20,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:20,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 10:51:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:20,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:51:20,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:20,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 10:51:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:20,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:51:20,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:20,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:20,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 10:51:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:20,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 10:51:20,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:20,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:20,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-13 10:51:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:20,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 10:51:20,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:20,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:51:20,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:20,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-13 10:51:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:20,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:20,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:20,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:20,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:51:20,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:20,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:20,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:20,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:20,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:20,524 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-13 10:51:20,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698521977] [2020-10-13 10:51:20,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:20,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:51:20,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385465554] [2020-10-13 10:51:20,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:51:20,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:20,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:51:20,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:20,528 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 10 states. [2020-10-13 10:51:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:20,923 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2020-10-13 10:51:20,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:51:20,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-13 10:51:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:20,925 INFO L225 Difference]: With dead ends: 73 [2020-10-13 10:51:20,925 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:51:20,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:51:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:51:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 10:51:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:51:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2020-10-13 10:51:20,936 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 56 [2020-10-13 10:51:20,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:20,937 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2020-10-13 10:51:20,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:51:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2020-10-13 10:51:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 10:51:20,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:20,939 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:20,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:51:20,939 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:20,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:20,940 INFO L82 PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times [2020-10-13 10:51:20,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:20,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453622952] [2020-10-13 10:51:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:20,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:51:21,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:21,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 307 [2020-10-13 10:51:21,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:51:21,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:51:21,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:51:21,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:21,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:21,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:21,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:21,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 10:51:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:21,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:51:21,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:21,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:21,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 10:51:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:21,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:51:21,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:21,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:21,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 10:51:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:21,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:21,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:21,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:21,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-13 10:51:21,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:21,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:21,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:21,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:21,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:21,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-13 10:51:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:21,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:21,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:21,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:21,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 10:51:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:21,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 10:51:21,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:51:21,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-13 10:51:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:21,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:21,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:21,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 10:51:21,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:21,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:51:21,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:21,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:21,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:21,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:21,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-13 10:51:21,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453622952] [2020-10-13 10:51:21,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:21,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:51:21,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106189460] [2020-10-13 10:51:21,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:51:21,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:51:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:21,498 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2020-10-13 10:51:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:21,708 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-10-13 10:51:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:51:21,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-10-13 10:51:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:21,709 INFO L225 Difference]: With dead ends: 60 [2020-10-13 10:51:21,709 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 10:51:21,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:51:21,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 10:51:21,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 10:51:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 10:51:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 10:51:21,713 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2020-10-13 10:51:21,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:21,713 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 10:51:21,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:51:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 10:51:21,714 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 10:51:21,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:51:21,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 10:51:22,386 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 10:51:22,386 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:51:22,386 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 10:51:22,386 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 10:51:22,387 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 10:51:22,387 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 10:51:22,387 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:51:22,387 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-13 10:51:22,387 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:51:22,387 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-10-13 10:51:22,387 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-10-13 10:51:22,388 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 45) no Hoare annotation was computed. [2020-10-13 10:51:22,388 INFO L271 CegarLoopResult]: At program point L44(lines 14 45) the Hoare annotation is: true [2020-10-13 10:51:22,388 INFO L264 CegarLoopResult]: At program point L36(lines 26 37) the Hoare annotation is: (let ((.cse0 (+ main_~buflim~0 2))) (and (<= (+ main_~in~0 main_~bufferlen~0 1) (+ main_~buf~0 main_~inlen~0)) (<= main_~bufferlen~0 .cse0) (<= 0 main_~buf~0) (<= .cse0 main_~bufferlen~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0))) [2020-10-13 10:51:22,389 INFO L268 CegarLoopResult]: For program point L28(lines 28 29) no Hoare annotation was computed. [2020-10-13 10:51:22,389 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-10-13 10:51:22,389 INFO L268 CegarLoopResult]: For program point L20-1(lines 14 45) no Hoare annotation was computed. [2020-10-13 10:51:22,390 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-10-13 10:51:22,392 INFO L264 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 1) main_~bufferlen~0) (<= 2 main_~bufferlen~0) (<= 0 main_~in~0)) [2020-10-13 10:51:22,392 INFO L268 CegarLoopResult]: For program point L33(lines 33 34) no Hoare annotation was computed. [2020-10-13 10:51:22,392 INFO L268 CegarLoopResult]: For program point L21(lines 14 45) no Hoare annotation was computed. [2020-10-13 10:51:22,392 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 45) no Hoare annotation was computed. [2020-10-13 10:51:22,392 INFO L268 CegarLoopResult]: For program point L42(line 42) no Hoare annotation was computed. [2020-10-13 10:51:22,393 INFO L264 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-10-13 10:51:22,393 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (+ main_~buflim~0 2))) (and (<= (+ main_~in~0 main_~bufferlen~0 1) (+ main_~buf~0 main_~inlen~0)) (<= main_~bufferlen~0 .cse0) (<= 0 main_~buf~0) (<= (+ main_~buf~0 3) main_~bufferlen~0) (<= .cse0 main_~bufferlen~0) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0))) [2020-10-13 10:51:22,393 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 45) the Hoare annotation is: true [2020-10-13 10:51:22,393 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (let ((.cse0 (+ main_~buflim~0 2))) (and (<= (+ main_~in~0 main_~bufferlen~0 1) (+ main_~buf~0 main_~inlen~0)) (<= main_~bufferlen~0 .cse0) (<= 0 main_~buf~0) (<= (+ main_~buf~0 3) main_~bufferlen~0) (<= .cse0 main_~bufferlen~0) (<= (+ main_~bufferlen~0 1) main_~inlen~0) (<= 0 main_~in~0))) [2020-10-13 10:51:22,394 INFO L268 CegarLoopResult]: For program point L26-1(lines 26 37) no Hoare annotation was computed. [2020-10-13 10:51:22,394 INFO L264 CegarLoopResult]: At program point L26-3(lines 26 37) the Hoare annotation is: (and (<= 0 main_~buf~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 0 main_~in~0)) [2020-10-13 10:51:22,394 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-10-13 10:51:22,394 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-13 10:51:22,394 INFO L264 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (+ main_~buflim~0 2))) (and (<= (+ main_~in~0 main_~bufferlen~0 1) (+ main_~buf~0 main_~inlen~0)) (<= main_~bufferlen~0 .cse0) (<= 0 main_~buf~0) (<= .cse0 main_~bufferlen~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~bufferlen~0 1) main_~inlen~0))) [2020-10-13 10:51:22,395 INFO L264 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (+ main_~buflim~0 2))) (and (<= (+ main_~in~0 main_~bufferlen~0 1) (+ main_~buf~0 main_~inlen~0)) (<= main_~bufferlen~0 .cse0) (<= 0 main_~buf~0) (<= .cse0 main_~bufferlen~0) (<= (+ main_~buf~0 2) main_~bufferlen~0) (<= 1 main_~in~0) (<= (+ main_~bufferlen~0 1) main_~inlen~0))) [2020-10-13 10:51:22,396 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-10-13 10:51:22,396 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:51:22,396 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-13 10:51:22,396 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-13 10:51:22,396 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-10-13 10:51:22,398 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-10-13 10:51:22,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:51:22 BoogieIcfgContainer [2020-10-13 10:51:22,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:51:22,436 INFO L168 Benchmark]: Toolchain (without parser) took 6062.70 ms. Allocated memory was 147.3 MB in the beginning and 275.3 MB in the end (delta: 127.9 MB). Free memory was 103.6 MB in the beginning and 208.1 MB in the end (delta: -104.5 MB). Peak memory consumption was 132.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,438 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:51:22,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.14 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 93.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,440 INFO L168 Benchmark]: Boogie Preprocessor took 117.02 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.6 MB in the beginning and 181.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,441 INFO L168 Benchmark]: RCFGBuilder took 369.55 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 166.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,445 INFO L168 Benchmark]: TraceAbstraction took 5331.24 ms. Allocated memory was 203.4 MB in the beginning and 275.3 MB in the end (delta: 71.8 MB). Free memory was 166.2 MB in the beginning and 208.1 MB in the end (delta: -41.9 MB). Peak memory consumption was 139.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:51:22,455 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.14 ms. Allocated memory is still 147.3 MB. Free memory was 103.2 MB in the beginning and 93.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.02 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 93.6 MB in the beginning and 181.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 369.55 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 166.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5331.24 ms. Allocated memory was 203.4 MB in the beginning and 275.3 MB in the end (delta: 71.8 MB). Free memory was 166.2 MB in the beginning and 208.1 MB in the end (delta: -41.9 MB). Peak memory consumption was 139.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((in + bufferlen + 1 <= buf + inlen && bufferlen <= buflim + 2) && 0 <= buf) && buflim + 2 <= bufferlen) && buf + 2 <= bufferlen) && bufferlen + 1 <= inlen) && 0 <= in - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 289 SDtfs, 140 SDslu, 863 SDs, 0 SdLazy, 684 SolverSat, 132 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 44 PreInvPairs, 70 NumberOfFragments, 235 HoareAnnotationTreeSize, 44 FomulaSimplifications, 118 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 15 FomulaSimplificationsInter, 702 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 255 NumberOfCodeBlocks, 255 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 247 ConstructedInterpolants, 0 QuantifiedInterpolants, 29057 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 235/253 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...