/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=0.2 --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/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:19:59,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:19:59,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:19:59,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:19:59,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:19:59,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:19:59,136 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:19:59,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:19:59,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:19:59,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:19:59,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:19:59,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:19:59,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:19:59,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:19:59,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:19:59,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:19:59,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:19:59,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:19:59,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:19:59,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:19:59,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:19:59,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:19:59,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:19:59,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:19:59,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:19:59,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:19:59,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:19:59,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:19:59,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:19:59,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:19:59,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:19:59,205 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:19:59,206 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:19:59,207 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:19:59,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:19:59,208 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:19:59,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:19:59,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:19:59,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:19:59,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:19:59,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:19:59,214 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 04:19:59,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:19:59,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:19:59,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:19:59,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:19:59,264 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:19:59,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:19:59,265 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:19:59,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:19:59,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:19:59,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:19:59,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:19:59,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:19:59,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:19:59,268 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:19:59,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:19:59,268 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:19:59,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:19:59,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:19:59,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:19:59,269 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:19:59,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:19:59,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:19:59,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:19:59,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:19:59,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:19:59,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:19:59,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:19:59,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:19:59,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:19:59,271 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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;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=0.2;log-additional-information=true; [2020-09-25 04:19:59,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:19:59,758 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:19:59,763 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:19:59,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:19:59,766 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:19:59,767 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-09-25 04:19:59,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/119060241/b5c9919d4c51462aa173f38907b7367a/FLAG90c8fbdfd [2020-09-25 04:20:00,390 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:20:00,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-09-25 04:20:00,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/119060241/b5c9919d4c51462aa173f38907b7367a/FLAG90c8fbdfd [2020-09-25 04:20:00,723 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/119060241/b5c9919d4c51462aa173f38907b7367a [2020-09-25 04:20:00,737 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:20:00,745 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:20:00,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:20:00,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:20:00,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:20:00,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:20:00" (1/1) ... [2020-09-25 04:20:00,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@607f9855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:00, skipping insertion in model container [2020-09-25 04:20:00,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:20:00" (1/1) ... [2020-09-25 04:20:00,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:20:00,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:20:01,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:20:01,006 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:20:01,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:20:01,039 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:20:01,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01 WrapperNode [2020-09-25 04:20:01,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:20:01,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:20:01,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:20:01,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:20:01,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01" (1/1) ... [2020-09-25 04:20:01,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01" (1/1) ... [2020-09-25 04:20:01,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01" (1/1) ... [2020-09-25 04:20:01,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01" (1/1) ... [2020-09-25 04:20:01,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01" (1/1) ... [2020-09-25 04:20:01,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01" (1/1) ... [2020-09-25 04:20:01,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01" (1/1) ... [2020-09-25 04:20:01,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:20:01,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:20:01,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:20:01,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:20:01,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01" (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 04:20:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:20:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:20:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-25 04:20:01,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:20:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 04:20:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:20:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-25 04:20:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:20:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:20:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:20:01,459 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:20:01,460 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 04:20:01,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:20:01 BoogieIcfgContainer [2020-09-25 04:20:01,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:20:01,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:20:01,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:20:01,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:20:01,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:20:00" (1/3) ... [2020-09-25 04:20:01,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6719a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:20:01, skipping insertion in model container [2020-09-25 04:20:01,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:20:01" (2/3) ... [2020-09-25 04:20:01,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6719a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:20:01, skipping insertion in model container [2020-09-25 04:20:01,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:20:01" (3/3) ... [2020-09-25 04:20:01,482 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-09-25 04:20:01,508 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:20:01,537 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:20:01,566 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:20:01,593 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:20:01,594 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:20:01,594 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:20:01,594 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:20:01,594 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:20:01,595 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:20:01,595 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:20:01,595 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:20:01,615 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-25 04:20:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 04:20:01,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:20:01,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:20:01,624 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:20:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:20:01,631 INFO L82 PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times [2020-09-25 04:20:01,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:20:01,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661613513] [2020-09-25 04:20:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:20:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:01,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:01,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:01,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 04:20:01,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:20:01,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-09-25 04:20:01,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:01,824 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:01,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:20:01,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 04:20:01,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:20:01,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 04:20:01,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:20:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:01,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:01,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:01,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:20:01,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:20:01,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 04:20:01,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:01,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:01,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:20:01,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:20:01,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:20:01,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 04:20:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 04:20:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:01,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:01,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:01,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:20:01,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:20:01,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-25 04:20:01,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:01,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 04:20:01,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:20:01,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:20:01,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:20:02,030 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 04:20:02,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661613513] [2020-09-25 04:20:02,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:20:02,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:20:02,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466130983] [2020-09-25 04:20:02,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:20:02,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:20:02,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:20:02,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:20:02,063 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-09-25 04:20:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:20:02,161 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-09-25 04:20:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:20:02,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-25 04:20:02,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:20:02,178 INFO L225 Difference]: With dead ends: 44 [2020-09-25 04:20:02,178 INFO L226 Difference]: Without dead ends: 28 [2020-09-25 04:20:02,183 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 04:20:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-25 04:20:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-25 04:20:02,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 04:20:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-25 04:20:02,235 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-09-25 04:20:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:20:02,235 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-25 04:20:02,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:20:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-25 04:20:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 04:20:02,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:20:02,239 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] [2020-09-25 04:20:02,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:20:02,239 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:20:02,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:20:02,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times [2020-09-25 04:20:02,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:20:02,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212363253] [2020-09-25 04:20:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:20:02,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:02,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:02,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:02,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:02,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 04:20:02,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:20:02,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 507 [2020-09-25 04:20:02,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:02,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 04:20:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 04:20:02,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 04:20:02,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 04:20:02,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:20:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:02,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:02,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:02,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:20:02,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:20:02,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:20:02,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:02,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:02,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:20:02,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:20:02,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:20:02,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:20:02,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 04:20:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:02,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:02,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:02,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:03,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 04:20:03,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 04:20:03,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-09-25 04:20:03,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:03,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 04:20:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:20:03,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 04:20:03,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:20:03,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 04:20:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:03,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:03,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:03,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:20:03,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:20:03,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-25 04:20:03,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:03,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:03,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:20:03,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:20:03,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:20:03,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:20:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 04:20:03,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212363253] [2020-09-25 04:20:03,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:20:03,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 04:20:03,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922739648] [2020-09-25 04:20:03,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 04:20:03,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:20:03,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 04:20:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:20:03,083 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-09-25 04:20:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:20:03,125 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-09-25 04:20:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 04:20:03,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-09-25 04:20:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:20:03,127 INFO L225 Difference]: With dead ends: 36 [2020-09-25 04:20:03,127 INFO L226 Difference]: Without dead ends: 30 [2020-09-25 04:20:03,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 04:20:03,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-25 04:20:03,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-25 04:20:03,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 04:20:03,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-25 04:20:03,142 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 28 [2020-09-25 04:20:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:20:03,142 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-25 04:20:03,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 04:20:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-25 04:20:03,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 04:20:03,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:20:03,146 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] [2020-09-25 04:20:03,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:20:03,147 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:20:03,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:20:03,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times [2020-09-25 04:20:03,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:20:03,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871980833] [2020-09-25 04:20:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:20:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:03,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:03,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:03,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 04:20:03,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:20:03,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-09-25 04:20:03,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:03,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:03,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 04:20:03,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 04:20:03,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 04:20:03,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 04:20:03,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:20:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:03,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:03,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:03,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 04:20:03,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:20:03,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 04:20:03,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:03,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:03,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:20:03,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:20:03,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:20:03,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:20:03,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-25 04:20:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:03,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:03,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:03,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-25 04:20:03,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:20:03,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-09-25 04:20:03,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:03,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:03,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 04:20:03,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:20:03,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 04:20:03,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:20:03,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 04:20:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:20:03,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:20:03,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:20:03,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 04:20:03,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:20:03,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-25 04:20:03,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:20:03,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:20:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 04:20:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:20:03,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 04:20:03,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-25 04:20:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 04:20:03,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871980833] [2020-09-25 04:20:03,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 04:20:03,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 04:20:03,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994002977] [2020-09-25 04:20:03,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 04:20:03,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:20:03,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 04:20:03,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 04:20:03,610 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-09-25 04:20:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:20:03,727 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-09-25 04:20:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 04:20:03,728 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-25 04:20:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:20:03,730 INFO L225 Difference]: With dead ends: 57 [2020-09-25 04:20:03,730 INFO L226 Difference]: Without dead ends: 37 [2020-09-25 04:20:03,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-25 04:20:03,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-25 04:20:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-09-25 04:20:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 04:20:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-25 04:20:03,738 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-09-25 04:20:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:20:03,739 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-25 04:20:03,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 04:20:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-25 04:20:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 04:20:03,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:20:03,741 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 04:20:03,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 04:20:03,741 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:20:03,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:20:03,742 INFO L82 PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times [2020-09-25 04:20:03,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:20:03,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544571812] [2020-09-25 04:20:03,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:20:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 04:20:03,761 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 04:20:03,761 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 04:20:03,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 04:20:03,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:20:03 BoogieIcfgContainer [2020-09-25 04:20:03,791 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 04:20:03,795 INFO L168 Benchmark]: Toolchain (without parser) took 3054.19 ms. Allocated memory was 139.5 MB in the beginning and 235.4 MB in the end (delta: 95.9 MB). Free memory was 102.9 MB in the beginning and 149.3 MB in the end (delta: -46.4 MB). Peak memory consumption was 49.5 MB. Max. memory is 7.1 GB. [2020-09-25 04:20:03,796 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-25 04:20:03,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.37 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 93.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-25 04:20:03,798 INFO L168 Benchmark]: Boogie Preprocessor took 118.10 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-25 04:20:03,799 INFO L168 Benchmark]: RCFGBuilder took 307.87 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 168.3 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-25 04:20:03,800 INFO L168 Benchmark]: TraceAbstraction took 2319.97 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 167.7 MB in the beginning and 149.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2020-09-25 04:20:03,804 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.37 ms. Allocated memory is still 139.5 MB. Free memory was 102.3 MB in the beginning and 93.1 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.10 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 307.87 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 168.3 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2319.97 ms. Allocated memory was 201.9 MB in the beginning and 235.4 MB in the end (delta: 33.6 MB). Free memory was 167.7 MB in the beginning and 149.3 MB in the end (delta: 18.3 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); [L13] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id((unsigned int)x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id((unsigned int)x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id((unsigned int)x-1) [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; [L6] RET, EXPR id((unsigned int)x-1) [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 2 [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 8 SDslu, 271 SDs, 0 SdLazy, 71 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 2977 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 6/8 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...