/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/recursive/gcd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 12:55:27,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 12:55:27,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 12:55:28,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 12:55:28,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 12:55:28,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 12:55:28,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 12:55:28,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 12:55:28,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 12:55:28,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 12:55:28,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 12:55:28,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 12:55:28,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 12:55:28,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 12:55:28,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 12:55:28,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 12:55:28,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 12:55:28,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 12:55:28,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 12:55:28,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 12:55:28,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 12:55:28,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 12:55:28,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 12:55:28,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 12:55:28,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 12:55:28,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 12:55:28,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 12:55:28,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 12:55:28,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 12:55:28,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 12:55:28,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 12:55:28,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 12:55:28,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 12:55:28,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 12:55:28,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 12:55:28,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 12:55:28,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 12:55:28,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 12:55:28,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 12:55:28,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 12:55:28,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 12:55:28,102 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 12:55:28,146 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 12:55:28,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 12:55:28,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 12:55:28,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 12:55:28,148 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 12:55:28,148 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 12:55:28,148 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 12:55:28,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 12:55:28,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 12:55:28,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 12:55:28,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 12:55:28,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 12:55:28,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 12:55:28,150 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 12:55:28,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 12:55:28,150 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 12:55:28,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 12:55:28,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 12:55:28,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 12:55:28,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 12:55:28,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 12:55:28,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 12:55:28,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 12:55:28,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 12:55:28,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 12:55:28,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 12:55:28,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 12:55:28,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 12:55:28,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 12:55:28,154 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 12:55:28,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 12:55:28,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 12:55:28,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 12:55:28,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 12:55:28,466 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 12:55:28,467 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c [2020-10-13 12:55:28,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/891807e52/2d1fd5f1ee9c4566909e6d903e21e213/FLAGac2d11130 [2020-10-13 12:55:29,003 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 12:55:29,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/gcd01-1.c [2020-10-13 12:55:29,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/891807e52/2d1fd5f1ee9c4566909e6d903e21e213/FLAGac2d11130 [2020-10-13 12:55:29,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/891807e52/2d1fd5f1ee9c4566909e6d903e21e213 [2020-10-13 12:55:29,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 12:55:29,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 12:55:29,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 12:55:29,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 12:55:29,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 12:55:29,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:55:29" (1/1) ... [2020-10-13 12:55:29,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad4c324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29, skipping insertion in model container [2020-10-13 12:55:29,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:55:29" (1/1) ... [2020-10-13 12:55:29,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 12:55:29,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 12:55:29,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 12:55:29,705 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 12:55:29,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 12:55:29,733 INFO L208 MainTranslator]: Completed translation [2020-10-13 12:55:29,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29 WrapperNode [2020-10-13 12:55:29,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 12:55:29,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 12:55:29,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 12:55:29,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 12:55:29,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29" (1/1) ... [2020-10-13 12:55:29,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29" (1/1) ... [2020-10-13 12:55:29,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29" (1/1) ... [2020-10-13 12:55:29,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29" (1/1) ... [2020-10-13 12:55:29,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29" (1/1) ... [2020-10-13 12:55:29,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29" (1/1) ... [2020-10-13 12:55:29,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29" (1/1) ... [2020-10-13 12:55:29,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 12:55:29,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 12:55:29,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 12:55:29,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 12:55:29,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29" (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 12:55:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 12:55:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 12:55:29,916 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-10-13 12:55:29,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 12:55:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 12:55:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 12:55:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-10-13 12:55:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 12:55:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 12:55:29,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 12:55:30,119 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 12:55:30,120 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 12:55:30,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:55:30 BoogieIcfgContainer [2020-10-13 12:55:30,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 12:55:30,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 12:55:30,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 12:55:30,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 12:55:30,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:55:29" (1/3) ... [2020-10-13 12:55:30,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152aa6cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:55:30, skipping insertion in model container [2020-10-13 12:55:30,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:55:29" (2/3) ... [2020-10-13 12:55:30,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152aa6cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:55:30, skipping insertion in model container [2020-10-13 12:55:30,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:55:30" (3/3) ... [2020-10-13 12:55:30,132 INFO L109 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-10-13 12:55:30,143 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 12:55:30,151 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 12:55:30,166 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 12:55:30,192 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 12:55:30,193 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 12:55:30,193 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 12:55:30,193 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 12:55:30,193 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 12:55:30,193 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 12:55:30,194 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 12:55:30,194 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 12:55:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-13 12:55:30,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 12:55:30,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:30,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:30,229 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:30,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times [2020-10-13 12:55:30,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:30,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5666271] [2020-10-13 12:55:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:30,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:30,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:30,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:30,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:30,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 12:55:30,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:55:30,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-13 12:55:30,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:55:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 12:55:30,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 12:55:30,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 12:55:30,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:30,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:30,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:30,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:55:30,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:30,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 12:55:30,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:30,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:30,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:30,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:30,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:30,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 12:55:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:30,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:30,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:30,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:55:30,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:30,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 12:55:30,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:30,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 12:55:30,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:30,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:30,815 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 12:55:30,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5666271] [2020-10-13 12:55:30,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:30,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 12:55:30,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747127026] [2020-10-13 12:55:30,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 12:55:30,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:30,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 12:55:30,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 12:55:30,843 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-13 12:55:30,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:30,974 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-10-13 12:55:30,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:55:30,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-13 12:55:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:30,987 INFO L225 Difference]: With dead ends: 40 [2020-10-13 12:55:30,988 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 12:55:30,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 12:55:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 12:55:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 12:55:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 12:55:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-13 12:55:31,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2020-10-13 12:55:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:31,039 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-13 12:55:31,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 12:55:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-13 12:55:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 12:55:31,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:31,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:31,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 12:55:31,042 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:31,043 INFO L82 PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times [2020-10-13 12:55:31,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:31,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702801713] [2020-10-13 12:55:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:31,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:31,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 12:55:31,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:55:31,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-13 12:55:31,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:31,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:55:31,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:55:31,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:31,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:31,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:55:31,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:31,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:31,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:31,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:31,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:31,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:31,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:31,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 12:55:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:31,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:31,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:55:31,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:31,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 12:55:31,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:31,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:31,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:31,303 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 12:55:31,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702801713] [2020-10-13 12:55:31,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:31,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 12:55:31,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968511207] [2020-10-13 12:55:31,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 12:55:31,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:31,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 12:55:31,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 12:55:31,308 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-10-13 12:55:31,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:31,365 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-13 12:55:31,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:55:31,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-13 12:55:31,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:31,367 INFO L225 Difference]: With dead ends: 30 [2020-10-13 12:55:31,367 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 12:55:31,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 12:55:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 12:55:31,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-13 12:55:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 12:55:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-13 12:55:31,376 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-10-13 12:55:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:31,377 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-13 12:55:31,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 12:55:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-13 12:55:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 12:55:31,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:31,379 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:31,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 12:55:31,379 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:31,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times [2020-10-13 12:55:31,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:31,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216307809] [2020-10-13 12:55:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:31,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:31,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 12:55:31,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:55:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 276 [2020-10-13 12:55:31,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:31,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:55:31,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:55:31,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:55:31,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:31,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:31,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:55:31,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:31,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 12:55:31,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:31,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:31,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:31,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:31,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:31,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 12:55:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:31,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:31,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 12:55:31,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:31,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-13 12:55:31,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 12:55:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 12:55:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:55:31,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:31,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-13 12:55:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:31,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:31,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:55:31,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:31,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 12:55:31,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 12:55:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:31,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 12:55:31,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216307809] [2020-10-13 12:55:31,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:31,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 12:55:31,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702127066] [2020-10-13 12:55:31,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 12:55:31,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 12:55:31,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 12:55:31,790 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-10-13 12:55:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:31,910 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-13 12:55:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 12:55:31,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 12:55:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:31,913 INFO L225 Difference]: With dead ends: 36 [2020-10-13 12:55:31,913 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 12:55:31,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 12:55:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 12:55:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-10-13 12:55:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 12:55:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-10-13 12:55:31,923 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23 [2020-10-13 12:55:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:31,923 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-10-13 12:55:31,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 12:55:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-10-13 12:55:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 12:55:31,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:31,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:31,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 12:55:31,926 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:31,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:31,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times [2020-10-13 12:55:31,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:31,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113723202] [2020-10-13 12:55:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:31,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:31,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:31,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:32,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 12:55:32,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:55:32,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-13 12:55:32,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:32,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:55:32,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 12:55:32,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:55:32,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:32,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:32,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:32,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:55:32,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:32,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:32,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:32,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:32,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:32,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:32,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:32,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 12:55:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:32,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:32,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-13 12:55:32,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:32,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-13 12:55:32,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:32,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:55:32,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 12:55:32,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 12:55:32,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:32,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-13 12:55:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:32,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:32,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 12:55:32,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:32,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 12:55:32,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:32,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:32,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 12:55:32,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:32,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 12:55:32,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113723202] [2020-10-13 12:55:32,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:32,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 12:55:32,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906116008] [2020-10-13 12:55:32,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 12:55:32,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:32,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 12:55:32,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 12:55:32,333 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states. [2020-10-13 12:55:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:32,456 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-13 12:55:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 12:55:32,457 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-13 12:55:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:32,458 INFO L225 Difference]: With dead ends: 36 [2020-10-13 12:55:32,459 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 12:55:32,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-13 12:55:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 12:55:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-13 12:55:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 12:55:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-13 12:55:32,467 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23 [2020-10-13 12:55:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:32,467 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-13 12:55:32,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 12:55:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-13 12:55:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 12:55:32,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:32,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:32,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 12:55:32,469 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:32,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times [2020-10-13 12:55:32,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:32,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81860398] [2020-10-13 12:55:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:32,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:32,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 12:55:32,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 12:55:32,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-13 12:55:32,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 12:55:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 12:55:32,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 12:55:32,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:32,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:32,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:32,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:55:32,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:32,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 12:55:32,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:32,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:32,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:32,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:32,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:32,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 12:55:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:32,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:32,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:33,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 12:55:33,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:55:33,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-13 12:55:33,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:33,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 12:55:33,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:33,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 12:55:33,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 12:55:33,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-13 12:55:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:33,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:33,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:55:33,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:55:33,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-13 12:55:33,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:33,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:33,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:33,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 12:55:33,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81860398] [2020-10-13 12:55:33,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:33,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 12:55:33,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866912303] [2020-10-13 12:55:33,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 12:55:33,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:33,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 12:55:33,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 12:55:33,085 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states. [2020-10-13 12:55:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:33,140 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-13 12:55:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 12:55:33,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-13 12:55:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:33,141 INFO L225 Difference]: With dead ends: 31 [2020-10-13 12:55:33,142 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 12:55:33,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-13 12:55:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 12:55:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-13 12:55:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 12:55:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-13 12:55:33,148 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2020-10-13 12:55:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:33,149 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-13 12:55:33,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 12:55:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-13 12:55:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 12:55:33,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:33,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 12:55:33,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 12:55:33,151 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times [2020-10-13 12:55:33,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:33,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679105768] [2020-10-13 12:55:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:33,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:33,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 12:55:33,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 12:55:33,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 480 [2020-10-13 12:55:33,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:33,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 12:55:33,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 12:55:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 12:55:33,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:33,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:33,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:33,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:55:33,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:33,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:33,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:33,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:33,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:33,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:33,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:33,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 12:55:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:33,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:33,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 12:55:33,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:55:33,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-13 12:55:33,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:33,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 12:55:33,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:33,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 12:55:33,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:33,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-13 12:55:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:33,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:33,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:33,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:55:33,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 12:55:33,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 12:55:33,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:33,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 12:55:33,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679105768] [2020-10-13 12:55:33,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:33,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 12:55:33,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727098832] [2020-10-13 12:55:33,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 12:55:33,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 12:55:33,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 12:55:33,878 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 9 states. [2020-10-13 12:55:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:33,992 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-13 12:55:33,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 12:55:33,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-13 12:55:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:33,994 INFO L225 Difference]: With dead ends: 36 [2020-10-13 12:55:33,994 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 12:55:33,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-13 12:55:33,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 12:55:34,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-13 12:55:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 12:55:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-13 12:55:34,002 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2020-10-13 12:55:34,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:34,002 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-13 12:55:34,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 12:55:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-13 12:55:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 12:55:34,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 12:55:34,004 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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 12:55:34,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 12:55:34,005 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 12:55:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 12:55:34,005 INFO L82 PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times [2020-10-13 12:55:34,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 12:55:34,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913013263] [2020-10-13 12:55:34,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 12:55:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:34,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:34,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:34,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:34,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:34,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:34,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:34,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:35,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:35,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 12:55:35,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 12:55:35,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-13 12:55:35,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:35,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 12:55:35,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 12:55:35,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 12:55:35,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:35,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 12:55:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:35,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:35,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:35,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 12:55:35,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:35,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 12:55:35,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:35,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 12:55:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 12:55:35,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 12:55:35,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 12:55:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:35,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:35,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:35,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:35,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:35,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:35,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:36,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:36,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 12:55:36,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 12:55:36,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 797 [2020-10-13 12:55:36,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:36,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 12:55:36,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:36,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 12:55:36,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:36,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-13 12:55:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:36,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:36,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:36,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:36,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:36,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 12:55:36,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 12:55:36,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-13 12:55:36,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:36,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 12:55:36,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:36,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 12:55:36,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:36,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-13 12:55:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 12:55:36,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 12:55:36,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 12:55:36,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 12:55:36,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 12:55:36,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 12:55:36,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 12:55:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 12:55:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 12:55:36,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 12:55:36,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 12:55:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 12:55:36,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913013263] [2020-10-13 12:55:36,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 12:55:36,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 12:55:36,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907616980] [2020-10-13 12:55:36,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 12:55:36,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 12:55:36,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 12:55:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 12:55:36,670 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states. [2020-10-13 12:55:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 12:55:36,746 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-10-13 12:55:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 12:55:36,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 12:55:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 12:55:36,747 INFO L225 Difference]: With dead ends: 30 [2020-10-13 12:55:36,747 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 12:55:36,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-13 12:55:36,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 12:55:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 12:55:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 12:55:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 12:55:36,750 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2020-10-13 12:55:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 12:55:36,751 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 12:55:36,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 12:55:36,751 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 12:55:36,752 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 12:55:36,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 12:55:36,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 12:55:36,881 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-13 12:55:36,881 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 12:55:36,881 INFO L268 CegarLoopResult]: For program point gcdFINAL(lines 15 26) no Hoare annotation was computed. [2020-10-13 12:55:36,882 INFO L268 CegarLoopResult]: For program point gcdEXIT(lines 15 26) no Hoare annotation was computed. [2020-10-13 12:55:36,882 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= gcd_~y2 |gcd_#in~y2|) (< gcd_~y1 gcd_~y2) (= gcd_~y1 |gcd_#in~y1|) (<= 1 gcd_~y1)) [2020-10-13 12:55:36,882 INFO L268 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-10-13 12:55:36,882 INFO L271 CegarLoopResult]: At program point gcdENTRY(lines 15 26) the Hoare annotation is: true [2020-10-13 12:55:36,882 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (= gcd_~y2 |gcd_#in~y2|) (= gcd_~y1 |gcd_#in~y1|)) [2020-10-13 12:55:36,882 INFO L268 CegarLoopResult]: For program point L22(lines 22 24) no Hoare annotation was computed. [2020-10-13 12:55:36,883 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-10-13 12:55:36,883 INFO L268 CegarLoopResult]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-10-13 12:55:36,883 INFO L268 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-10-13 12:55:36,883 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 12:55:36,883 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-13 12:55:36,883 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 12:55:36,883 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 12:55:36,884 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-10-13 12:55:36,884 INFO L268 CegarLoopResult]: For program point L30(lines 30 32) no Hoare annotation was computed. [2020-10-13 12:55:36,884 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 28 43) the Hoare annotation is: true [2020-10-13 12:55:36,884 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 28 43) no Hoare annotation was computed. [2020-10-13 12:55:36,884 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-13 12:55:36,885 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-10-13 12:55:36,885 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 1 main_~n~0) (<= 1 main_~m~0)) [2020-10-13 12:55:36,885 INFO L268 CegarLoopResult]: For program point L38-1(lines 28 43) no Hoare annotation was computed. [2020-10-13 12:55:36,885 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-10-13 12:55:36,886 INFO L268 CegarLoopResult]: For program point L34(lines 34 36) no Hoare annotation was computed. [2020-10-13 12:55:36,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:55:36 BoogieIcfgContainer [2020-10-13 12:55:36,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 12:55:36,896 INFO L168 Benchmark]: Toolchain (without parser) took 7446.00 ms. Allocated memory was 148.9 MB in the beginning and 294.1 MB in the end (delta: 145.2 MB). Free memory was 104.0 MB in the beginning and 137.9 MB in the end (delta: -33.9 MB). Peak memory consumption was 111.4 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:36,902 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 148.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-13 12:55:36,903 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.88 ms. Allocated memory is still 148.9 MB. Free memory was 103.8 MB in the beginning and 94.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:36,904 INFO L168 Benchmark]: Boogie Preprocessor took 110.33 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 94.2 MB in the beginning and 184.1 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:36,905 INFO L168 Benchmark]: RCFGBuilder took 278.94 ms. Allocated memory is still 205.0 MB. Free memory was 183.1 MB in the beginning and 170.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:36,906 INFO L168 Benchmark]: TraceAbstraction took 6767.57 ms. Allocated memory was 205.0 MB in the beginning and 294.1 MB in the end (delta: 89.1 MB). Free memory was 170.3 MB in the beginning and 137.9 MB in the end (delta: 32.4 MB). Peak memory consumption was 121.5 MB. Max. memory is 7.1 GB. [2020-10-13 12:55:36,919 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 148.9 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.88 ms. Allocated memory is still 148.9 MB. Free memory was 103.8 MB in the beginning and 94.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.33 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 94.2 MB in the beginning and 184.1 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.94 ms. Allocated memory is still 205.0 MB. Free memory was 183.1 MB in the beginning and 170.3 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6767.57 ms. Allocated memory was 205.0 MB in the beginning and 294.1 MB in the end (delta: 89.1 MB). Free memory was 170.3 MB in the beginning and 137.9 MB in the end (delta: 32.4 MB). Peak memory consumption was 121.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.5s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 148 SDtfs, 99 SDslu, 513 SDs, 0 SdLazy, 282 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 40 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 27 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 7025 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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...