/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 SingleStatement --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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:35:26,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:35:26,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:35:26,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:35:26,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:35:26,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:35:26,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:35:26,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:35:26,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:35:26,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:35:26,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:35:26,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:35:26,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:35:26,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:35:26,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:35:26,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:35:26,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:35:26,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:35:26,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:35:26,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:35:26,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:35:26,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:35:26,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:35:26,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:35:26,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:35:26,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:35:26,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:35:26,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:35:26,191 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:35:26,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:35:26,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:35:26,193 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:35:26,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:35:26,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:35:26,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:35:26,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:35:26,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:35:26,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:35:26,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:35:26,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:35:26,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:35:26,202 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 [2020-09-25 06:35:26,230 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:35:26,230 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:35:26,232 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:35:26,232 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:35:26,232 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:35:26,233 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:35:26,233 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:35:26,233 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:35:26,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:35:26,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:35:26,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:35:26,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:35:26,234 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:35:26,234 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:35:26,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:35:26,235 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:35:26,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:35:26,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:35:26,235 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:35:26,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:35:26,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:35:26,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:35:26,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:35:26,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:35:26,237 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:35:26,237 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:35:26,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:35:26,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:35:26,238 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:35:26,238 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 -> SingleStatement 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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=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=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:35:26,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:35:26,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:35:26,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:35:26,781 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:35:26,783 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:35:26,784 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 06:35:26,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a79554e3/d320eab14ce24c86ab54921dec7e1fae/FLAG9a4ff9f31 [2020-09-25 06:35:27,410 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:35:27,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-25 06:35:27,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a79554e3/d320eab14ce24c86ab54921dec7e1fae/FLAG9a4ff9f31 [2020-09-25 06:35:27,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6a79554e3/d320eab14ce24c86ab54921dec7e1fae [2020-09-25 06:35:27,788 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:35:27,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:35:27,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:35:27,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:35:27,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:35:27,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:35:27" (1/1) ... [2020-09-25 06:35:27,807 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4fe80c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:27, skipping insertion in model container [2020-09-25 06:35:27,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:35:27" (1/1) ... [2020-09-25 06:35:27,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:35:27,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:35:28,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:35:28,118 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:35:28,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:35:28,156 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:35:28,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28 WrapperNode [2020-09-25 06:35:28,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:35:28,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:35:28,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:35:28,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:35:28,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28" (1/1) ... [2020-09-25 06:35:28,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28" (1/1) ... [2020-09-25 06:35:28,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28" (1/1) ... [2020-09-25 06:35:28,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28" (1/1) ... [2020-09-25 06:35:28,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28" (1/1) ... [2020-09-25 06:35:28,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28" (1/1) ... [2020-09-25 06:35:28,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28" (1/1) ... [2020-09-25 06:35:28,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:35:28,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:35:28,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:35:28,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:35:28,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28" (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 [2020-09-25 06:35:28,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:35:28,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:35:28,360 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-25 06:35:28,360 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-25 06:35:28,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:35:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:35:28,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:35:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-25 06:35:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-25 06:35:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:35:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:35:28,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:35:28,644 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:35:28,644 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 06:35:28,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:35:28 BoogieIcfgContainer [2020-09-25 06:35:28,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:35:28,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:35:28,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:35:28,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:35:28,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:35:27" (1/3) ... [2020-09-25 06:35:28,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537751d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:35:28, skipping insertion in model container [2020-09-25 06:35:28,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:35:28" (2/3) ... [2020-09-25 06:35:28,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@537751d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:35:28, skipping insertion in model container [2020-09-25 06:35:28,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:35:28" (3/3) ... [2020-09-25 06:35:28,661 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-09-25 06:35:28,674 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:35:28,684 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:35:28,708 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:35:28,743 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:35:28,743 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:35:28,743 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:35:28,743 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:35:28,744 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:35:28,744 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:35:28,744 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:35:28,744 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:35:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-25 06:35:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 06:35:28,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:35:28,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:35:28,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:35:28,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:35:28,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1089710179, now seen corresponding path program 1 times [2020-09-25 06:35:28,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:35:28,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60706156] [2020-09-25 06:35:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:35:28,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:28,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:28,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:29,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:29,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 06:35:29,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:35:29,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-09-25 06:35:29,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:29,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:35:29,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 06:35:29,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 06:35:29,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 06:35:29,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:35:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:29,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:29,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:29,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:35:29,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:29,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:35:29,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:29,274 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:29,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:35:29,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:29,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:35:29,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:29,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 06:35:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:29,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:29,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:29,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:35:29,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 06:35:29,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:29,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:29,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:35:29,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:29,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 06:35:29,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:35:29,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60706156] [2020-09-25 06:35:29,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:35:29,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:35:29,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75977441] [2020-09-25 06:35:29,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:35:29,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:35:29,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:35:29,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:35:29,354 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-25 06:35:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:35:29,476 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2020-09-25 06:35:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 06:35:29,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 06:35:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:35:29,493 INFO L225 Difference]: With dead ends: 58 [2020-09-25 06:35:29,493 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 06:35:29,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:35:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 06:35:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-25 06:35:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 06:35:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 06:35:29,564 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 16 [2020-09-25 06:35:29,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:35:29,564 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 06:35:29,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:35:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 06:35:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 06:35:29,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:35:29,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:35:29,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:35:29,568 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:35:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:35:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash -653728005, now seen corresponding path program 1 times [2020-09-25 06:35:29,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:35:29,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720054346] [2020-09-25 06:35:29,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:35:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:29,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:29,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:29,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 06:35:29,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:29,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 06:35:29,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:29,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:35:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:35:29,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 06:35:29,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:29,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:35:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:29,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:29,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:29,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:35:29,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:29,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:35:29,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:29,660 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:29,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:35:29,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:29,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:35:29,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:29,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 06:35:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:29,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:29,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:29,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 06:35:29,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-25 06:35:29,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:29,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:29,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:35:29,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 06:35:29,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 06:35:29,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 06:35:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:35:29,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720054346] [2020-09-25 06:35:29,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:35:29,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:35:29,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579742916] [2020-09-25 06:35:29,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:35:29,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:35:29,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:35:29,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:35:29,785 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-09-25 06:35:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:35:29,873 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-09-25 06:35:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:35:29,874 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 06:35:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:35:29,876 INFO L225 Difference]: With dead ends: 50 [2020-09-25 06:35:29,876 INFO L226 Difference]: Without dead ends: 44 [2020-09-25 06:35:29,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:35:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-25 06:35:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-25 06:35:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 06:35:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-09-25 06:35:29,888 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 17 [2020-09-25 06:35:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:35:29,889 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-09-25 06:35:29,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:35:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-09-25 06:35:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 06:35:29,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:35:29,892 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:35:29,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:35:29,892 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:35:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:35:29,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1617834856, now seen corresponding path program 1 times [2020-09-25 06:35:29,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:35:29,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599409272] [2020-09-25 06:35:29,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:35:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:29,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:29,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:30,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:30,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:30,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-25 06:35:30,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 06:35:30,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 885 [2020-09-25 06:35:30,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:30,795 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:35:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-25 06:35:30,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 06:35:30,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:30,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:35:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:30,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:30,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:30,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:35:30,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:30,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:35:30,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:30,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:35:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:30,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:35:30,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:30,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 06:35:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:30,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:30,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:31,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:31,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 06:35:31,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:35:31,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-09-25 06:35:31,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:31,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 06:35:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:31,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 06:35:31,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:31,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 06:35:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:31,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:31,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:31,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:35:31,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:31,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 06:35:31,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:31,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:31,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 06:35:31,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:31,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 06:35:31,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 06:35:31,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 06:35:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:31,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:31,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:31,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:35:31,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:31,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 06:35:31,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:31,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:31,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:35:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:31,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 06:35:31,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 06:35:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-25 06:35:31,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599409272] [2020-09-25 06:35:31,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:35:31,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 06:35:31,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925537669] [2020-09-25 06:35:31,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:35:31,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:35:31,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:35:31,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:35:31,428 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 8 states. [2020-09-25 06:35:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:35:31,623 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-09-25 06:35:31,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 06:35:31,628 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-09-25 06:35:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:35:31,636 INFO L225 Difference]: With dead ends: 64 [2020-09-25 06:35:31,636 INFO L226 Difference]: Without dead ends: 58 [2020-09-25 06:35:31,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 06:35:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-25 06:35:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-09-25 06:35:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 06:35:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 06:35:31,665 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 33 [2020-09-25 06:35:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:35:31,666 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 06:35:31,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:35:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 06:35:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 06:35:31,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:35:31,672 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:35:31,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:35:31,673 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:35:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:35:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash -159162515, now seen corresponding path program 1 times [2020-09-25 06:35:31,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:35:31,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753073468] [2020-09-25 06:35:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:35:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:31,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:31,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:31,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:31,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:32,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:32,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:33,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 06:35:33,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 06:35:33,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1667 [2020-09-25 06:35:33,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:33,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:33,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:35:33,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 06:35:33,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 06:35:33,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:33,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:35:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:33,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:33,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:35:33,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:33,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:35:33,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:33,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:35:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:33,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:35:33,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:33,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 06:35:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:33,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:33,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 06:35:33,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 06:35:33,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-09-25 06:35:33,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:33,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:33,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:35:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-25 06:35:33,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 06:35:33,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:33,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-25 06:35:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:33,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:33,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 06:35:33,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:35:33,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 06:35:33,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:33,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:33,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:35:33,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:33,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 06:35:33,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:33,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 06:35:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:35:33,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:35:33,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:35:33,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-09-25 06:35:33,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:35:33,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 06:35:33,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:35:33,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:35:33,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 06:35:33,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:35:33,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 06:35:33,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:35:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 06:35:33,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753073468] [2020-09-25 06:35:33,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:35:33,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 06:35:33,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710479441] [2020-09-25 06:35:33,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 06:35:33,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:35:33,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 06:35:33,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 06:35:33,925 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 7 states. [2020-09-25 06:35:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:35:34,083 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-09-25 06:35:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 06:35:34,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-09-25 06:35:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:35:34,088 INFO L225 Difference]: With dead ends: 62 [2020-09-25 06:35:34,088 INFO L226 Difference]: Without dead ends: 56 [2020-09-25 06:35:34,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 06:35:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-25 06:35:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-25 06:35:34,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 06:35:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-09-25 06:35:34,109 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 34 [2020-09-25 06:35:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:35:34,110 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-09-25 06:35:34,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 06:35:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-09-25 06:35:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 06:35:34,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:35:34,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:35:34,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:35:34,119 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:35:34,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:35:34,120 INFO L82 PathProgramCache]: Analyzing trace with hash 887160861, now seen corresponding path program 2 times [2020-09-25 06:35:34,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:35:34,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623955096] [2020-09-25 06:35:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:35:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 06:35:34,132 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 06:35:34,133 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 06:35:34,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:35:34,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:35:34 BoogieIcfgContainer [2020-09-25 06:35:34,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 06:35:34,171 INFO L168 Benchmark]: Toolchain (without parser) took 6378.91 ms. Allocated memory was 146.3 MB in the beginning and 248.0 MB in the end (delta: 101.7 MB). Free memory was 102.8 MB in the beginning and 160.4 MB in the end (delta: -57.5 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB. [2020-09-25 06:35:34,173 INFO L168 Benchmark]: CDTParser took 0.66 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.5 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-09-25 06:35:34,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.77 ms. Allocated memory is still 146.3 MB. Free memory was 102.0 MB in the beginning and 92.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-25 06:35:34,177 INFO L168 Benchmark]: Boogie Preprocessor took 128.52 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 92.5 MB in the beginning and 180.2 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-25 06:35:34,183 INFO L168 Benchmark]: RCFGBuilder took 364.10 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 165.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-09-25 06:35:34,184 INFO L168 Benchmark]: TraceAbstraction took 5515.55 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 165.5 MB in the beginning and 160.4 MB in the end (delta: 5.1 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-09-25 06:35:34,195 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 MB in the beginning and 120.5 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 360.77 ms. Allocated memory is still 146.3 MB. Free memory was 102.0 MB in the beginning and 92.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.52 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 92.5 MB in the beginning and 180.2 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 364.10 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 165.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5515.55 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 165.5 MB in the beginning and 160.4 MB in the end (delta: 5.1 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 2; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 1 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 169 SDtfs, 58 SDslu, 610 SDs, 0 SdLazy, 191 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 6900 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 9/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...