/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:21:07,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:21:07,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:21:07,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:21:07,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:21:07,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:21:07,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:21:07,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:21:07,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:21:07,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:21:07,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:21:07,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:21:07,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:21:07,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:21:07,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:21:07,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:21:07,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:21:07,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:21:07,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:21:07,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:21:07,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:21:07,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:21:07,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:21:07,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:21:07,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:21:07,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:21:07,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:21:07,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:21:07,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:21:07,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:21:07,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:21:07,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:21:07,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:21:07,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:21:07,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:21:07,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:21:07,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:21:07,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:21:07,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:21:07,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:21:07,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:21:07,241 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 [2020-09-24 19:21:07,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:21:07,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:21:07,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:21:07,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:21:07,302 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:21:07,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:21:07,303 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:21:07,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:21:07,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:21:07,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:21:07,304 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:21:07,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:21:07,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:21:07,305 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:21:07,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:21:07,305 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:21:07,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:21:07,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:21:07,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:21:07,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:21:07,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:21:07,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:21:07,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:21:07,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:21:07,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:21:07,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:21:07,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:21:07,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:21:07,308 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:21:07,308 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:21:07,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:21:07,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:21:07,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:21:07,814 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:21:07,814 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:21:07,815 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o3.c [2020-09-24 19:21:07,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f362e6d0/33eedcef1cee4d2483e94a742c2ba975/FLAG98557d2ac [2020-09-24 19:21:08,439 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:21:08,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o3.c [2020-09-24 19:21:08,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f362e6d0/33eedcef1cee4d2483e94a742c2ba975/FLAG98557d2ac [2020-09-24 19:21:08,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f362e6d0/33eedcef1cee4d2483e94a742c2ba975 [2020-09-24 19:21:08,793 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:21:08,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:21:08,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:21:08,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:21:08,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:21:08,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:21:08" (1/1) ... [2020-09-24 19:21:08,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd8ad23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:08, skipping insertion in model container [2020-09-24 19:21:08,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:21:08" (1/1) ... [2020-09-24 19:21:08,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:21:08,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:21:09,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:21:09,064 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:21:09,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:21:09,096 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:21:09,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09 WrapperNode [2020-09-24 19:21:09,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:21:09,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:21:09,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:21:09,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:21:09,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09" (1/1) ... [2020-09-24 19:21:09,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09" (1/1) ... [2020-09-24 19:21:09,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09" (1/1) ... [2020-09-24 19:21:09,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09" (1/1) ... [2020-09-24 19:21:09,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09" (1/1) ... [2020-09-24 19:21:09,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09" (1/1) ... [2020-09-24 19:21:09,127 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09" (1/1) ... [2020-09-24 19:21:09,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:21:09,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:21:09,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:21:09,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:21:09,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09" (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 [2020-09-24 19:21:09,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:21:09,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:21:09,296 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-24 19:21:09,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:21:09,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 19:21:09,296 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:21:09,296 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-24 19:21:09,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:21:09,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:21:09,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:21:09,474 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:21:09,474 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:21:09,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:21:09 BoogieIcfgContainer [2020-09-24 19:21:09,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:21:09,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:21:09,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:21:09,485 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:21:09,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:21:08" (1/3) ... [2020-09-24 19:21:09,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108961fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:21:09, skipping insertion in model container [2020-09-24 19:21:09,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:21:09" (2/3) ... [2020-09-24 19:21:09,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108961fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:21:09, skipping insertion in model container [2020-09-24 19:21:09,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:21:09" (3/3) ... [2020-09-24 19:21:09,491 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2020-09-24 19:21:09,501 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:21:09,511 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:21:09,532 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:21:09,565 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:21:09,565 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:21:09,565 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:21:09,566 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:21:09,566 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:21:09,566 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:21:09,566 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:21:09,566 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:21:09,591 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-24 19:21:09,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 19:21:09,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:21:09,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:21:09,601 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:21:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:21:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1651991454, now seen corresponding path program 1 times [2020-09-24 19:21:09,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:21:09,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890559005] [2020-09-24 19:21:09,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:21:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:09,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:09,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:09,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 19:21:09,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:09,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-24 19:21:09,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:09,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 19:21:09,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 19:21:09,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:21:09,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 19:21:09,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:21:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:09,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:09,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:09,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:21:09,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:09,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:21:09,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:09,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:21:09,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:21:09,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:21:09,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:21:09,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 19:21:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:09,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:09,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:09,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:21:09,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:09,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 19:21:09,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:09,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:21:09,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:21:09,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:21:09,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:21:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:21:10,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890559005] [2020-09-24 19:21:10,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 19:21:10,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 19:21:10,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544518028] [2020-09-24 19:21:10,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 19:21:10,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:21:10,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 19:21:10,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:21:10,078 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-09-24 19:21:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:21:10,170 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-09-24 19:21:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 19:21:10,172 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 19:21:10,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:21:10,189 INFO L225 Difference]: With dead ends: 37 [2020-09-24 19:21:10,189 INFO L226 Difference]: Without dead ends: 22 [2020-09-24 19:21:10,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 19:21:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-24 19:21:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-24 19:21:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 19:21:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-24 19:21:10,255 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2020-09-24 19:21:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:21:10,256 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-24 19:21:10,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 19:21:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-24 19:21:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 19:21:10,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:21:10,259 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:21:10,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:21:10,260 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:21:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:21:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 189324707, now seen corresponding path program 1 times [2020-09-24 19:21:10,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:21:10,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533974132] [2020-09-24 19:21:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:21:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:10,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:10,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:10,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 19:21:10,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:10,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-09-24 19:21:10,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 19:21:10,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 19:21:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 19:21:10,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:21:10,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:21:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:10,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:10,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:10,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:21:10,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:10,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:21:10,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:10,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:21:10,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:21:10,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:21:10,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 19:21:10,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 19:21:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:10,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:10,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:10,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:21:10,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:10,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-09-24 19:21:10,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:10,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:21:10,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:21:10,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:21:10,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:21:10,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 19:21:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:10,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:10,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:10,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:21:10,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:10,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 19:21:10,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:10,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:21:10,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:21:10,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:21:10,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:21:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 19:21:10,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533974132] [2020-09-24 19:21:10,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:21:10,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 19:21:10,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85041449] [2020-09-24 19:21:10,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 19:21:10,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:21:10,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 19:21:10,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 19:21:10,922 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2020-09-24 19:21:11,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:21:11,033 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-09-24 19:21:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 19:21:11,034 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-09-24 19:21:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:21:11,035 INFO L225 Difference]: With dead ends: 31 [2020-09-24 19:21:11,035 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 19:21:11,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:21:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 19:21:11,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-24 19:21:11,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-24 19:21:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-09-24 19:21:11,044 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-09-24 19:21:11,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:21:11,045 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-09-24 19:21:11,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 19:21:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-09-24 19:21:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 19:21:11,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:21:11,047 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:21:11,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 19:21:11,048 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:21:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:21:11,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1416732684, now seen corresponding path program 2 times [2020-09-24 19:21:11,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:21:11,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435541467] [2020-09-24 19:21:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:21:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:11,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:11,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:11,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 19:21:11,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:11,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-09-24 19:21:11,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:11,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 19:21:11,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 19:21:11,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 19:21:11,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:21:11,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:21:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:11,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:11,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:11,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:21:11,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:11,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 19:21:11,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:11,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:21:11,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:21:11,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:21:11,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:21:11,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 19:21:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:11,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:11,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:11,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 19:21:11,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:11,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-24 19:21:11,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:11,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 19:21:11,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:21:11,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 19:21:11,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:21:11,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 19:21:11,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:11,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:11,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:11,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 19:21:11,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:11,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 19:21:11,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:11,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 19:21:11,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:21:11,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-24 19:21:11,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:21:11,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 19:21:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:21:11,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:21:11,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:21:11,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 19:21:11,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:21:11,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 19:21:11,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:21:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:21:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:21:11,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 19:21:11,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:21:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-24 19:21:11,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435541467] [2020-09-24 19:21:11,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:21:11,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 19:21:11,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715000846] [2020-09-24 19:21:11,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 19:21:11,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:21:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 19:21:11,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 19:21:11,779 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2020-09-24 19:21:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:21:11,892 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-09-24 19:21:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 19:21:11,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-09-24 19:21:11,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:21:11,895 INFO L225 Difference]: With dead ends: 35 [2020-09-24 19:21:11,896 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 19:21:11,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-09-24 19:21:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 19:21:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-24 19:21:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-24 19:21:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-09-24 19:21:11,903 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 30 [2020-09-24 19:21:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:21:11,904 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-09-24 19:21:11,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 19:21:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-09-24 19:21:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 19:21:11,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:21:11,906 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:21:11,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 19:21:11,907 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:21:11,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:21:11,907 INFO L82 PathProgramCache]: Analyzing trace with hash -209476043, now seen corresponding path program 3 times [2020-09-24 19:21:11,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:21:11,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748208745] [2020-09-24 19:21:11,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:21:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 19:21:11,923 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 19:21:11,923 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 19:21:11,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 19:21:11,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:21:11 BoogieIcfgContainer [2020-09-24 19:21:11,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:21:11,957 INFO L168 Benchmark]: Toolchain (without parser) took 3160.00 ms. Allocated memory was 140.5 MB in the beginning and 233.3 MB in the end (delta: 92.8 MB). Free memory was 103.0 MB in the beginning and 142.7 MB in the end (delta: -39.7 MB). Peak memory consumption was 53.1 MB. Max. memory is 7.1 GB. [2020-09-24 19:21:11,958 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:21:11,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.92 ms. Allocated memory is still 140.5 MB. Free memory was 102.3 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-24 19:21:11,960 INFO L168 Benchmark]: Boogie Preprocessor took 29.91 ms. Allocated memory is still 140.5 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-24 19:21:11,961 INFO L168 Benchmark]: RCFGBuilder took 350.71 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 171.5 MB in the end (delta: -79.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-24 19:21:11,962 INFO L168 Benchmark]: TraceAbstraction took 2472.62 ms. Allocated memory was 202.9 MB in the beginning and 233.3 MB in the end (delta: 30.4 MB). Free memory was 170.9 MB in the beginning and 142.7 MB in the end (delta: 28.2 MB). Peak memory consumption was 58.6 MB. Max. memory is 7.1 GB. [2020-09-24 19:21:11,966 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 295.92 ms. Allocated memory is still 140.5 MB. Free memory was 102.3 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.91 ms. Allocated memory is still 140.5 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 350.71 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 91.8 MB in the beginning and 171.5 MB in the end (delta: -79.7 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2472.62 ms. Allocated memory was 202.9 MB in the beginning and 233.3 MB in the end (delta: 30.4 MB). Free memory was 170.9 MB in the beginning and 142.7 MB in the end (delta: 28.2 MB). Peak memory consumption was 58.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 68 SDtfs, 8 SDslu, 309 SDs, 0 SdLazy, 60 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 5502 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 9/19 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...