/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 02:09:27,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 02:09:27,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 02:09:27,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 02:09:27,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 02:09:27,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 02:09:27,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 02:09:27,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 02:09:27,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 02:09:27,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 02:09:27,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 02:09:27,548 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 02:09:27,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 02:09:27,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 02:09:27,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 02:09:27,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 02:09:27,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 02:09:27,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 02:09:27,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 02:09:27,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 02:09:27,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 02:09:27,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 02:09:27,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 02:09:27,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 02:09:27,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 02:09:27,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 02:09:27,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 02:09:27,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 02:09:27,592 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 02:09:27,596 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 02:09:27,596 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 02:09:27,597 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 02:09:27,598 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 02:09:27,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 02:09:27,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 02:09:27,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 02:09:27,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 02:09:27,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 02:09:27,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 02:09:27,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 02:09:27,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 02:09:27,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-15 02:09:27,637 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 02:09:27,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 02:09:27,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 02:09:27,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 02:09:27,639 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 02:09:27,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 02:09:27,639 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 02:09:27,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 02:09:27,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 02:09:27,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 02:09:27,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 02:09:27,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 02:09:27,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 02:09:27,640 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 02:09:27,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 02:09:27,641 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 02:09:27,641 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 02:09:27,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 02:09:27,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 02:09:27,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 02:09:27,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 02:09:27,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 02:09:27,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 02:09:27,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 02:09:27,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 02:09:27,643 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 02:09:27,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 02:09:27,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 02:09:27,643 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 02:09:27,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 02:09:27,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 02:09:27,983 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 02:09:27,987 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 02:09:27,989 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 02:09:27,989 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 02:09:27,990 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-10-15 02:09:28,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c45f23c5/95cc592786b44b4fb9b132b396d460e1/FLAG8d2cc53fe [2020-10-15 02:09:28,494 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 02:09:28,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-10-15 02:09:28,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c45f23c5/95cc592786b44b4fb9b132b396d460e1/FLAG8d2cc53fe [2020-10-15 02:09:28,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8c45f23c5/95cc592786b44b4fb9b132b396d460e1 [2020-10-15 02:09:28,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 02:09:28,849 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 02:09:28,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 02:09:28,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 02:09:28,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 02:09:28,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:09:28" (1/1) ... [2020-10-15 02:09:28,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d084142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:28, skipping insertion in model container [2020-10-15 02:09:28,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:09:28" (1/1) ... [2020-10-15 02:09:28,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 02:09:28,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 02:09:29,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 02:09:29,064 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 02:09:29,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 02:09:29,092 INFO L208 MainTranslator]: Completed translation [2020-10-15 02:09:29,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29 WrapperNode [2020-10-15 02:09:29,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 02:09:29,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 02:09:29,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 02:09:29,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 02:09:29,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29" (1/1) ... [2020-10-15 02:09:29,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29" (1/1) ... [2020-10-15 02:09:29,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29" (1/1) ... [2020-10-15 02:09:29,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29" (1/1) ... [2020-10-15 02:09:29,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29" (1/1) ... [2020-10-15 02:09:29,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29" (1/1) ... [2020-10-15 02:09:29,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29" (1/1) ... [2020-10-15 02:09:29,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 02:09:29,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 02:09:29,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 02:09:29,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 02:09:29,204 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 02:09:29,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 02:09:29,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 02:09:29,260 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-15 02:09:29,260 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-15 02:09:29,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 02:09:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-15 02:09:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 02:09:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-15 02:09:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-15 02:09:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 02:09:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 02:09:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 02:09:29,469 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 02:09:29,469 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 02:09:29,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:09:29 BoogieIcfgContainer [2020-10-15 02:09:29,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 02:09:29,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 02:09:29,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 02:09:29,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 02:09:29,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:09:28" (1/3) ... [2020-10-15 02:09:29,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cc1abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:09:29, skipping insertion in model container [2020-10-15 02:09:29,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:09:29" (2/3) ... [2020-10-15 02:09:29,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32cc1abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:09:29, skipping insertion in model container [2020-10-15 02:09:29,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:09:29" (3/3) ... [2020-10-15 02:09:29,513 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-10-15 02:09:29,540 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 02:09:29,547 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 02:09:29,580 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 02:09:29,604 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 02:09:29,604 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 02:09:29,604 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 02:09:29,604 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 02:09:29,605 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 02:09:29,605 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 02:09:29,605 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 02:09:29,605 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 02:09:29,625 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-15 02:09:29,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 02:09:29,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:09:29,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:09:29,633 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:09:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:09:29,640 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-10-15 02:09:29,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:09:29,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783196688] [2020-10-15 02:09:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:09:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:29,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:29,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:29,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-15 02:09:29,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:29,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-15 02:09:29,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:29,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:29,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 02:09:29,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 02:09:29,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:09:29,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-15 02:09:29,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:09:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:29,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:29,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:29,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 02:09:29,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:29,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 02:09:29,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:29,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:29,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:09:29,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:29,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:09:29,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:30,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 02:09:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:30,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:30,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:30,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 02:09:30,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:30,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-15 02:09:30,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:30,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 02:09:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:30,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:09:30,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 02:09:30,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783196688] [2020-10-15 02:09:30,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 02:09:30,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 02:09:30,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469745490] [2020-10-15 02:09:30,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 02:09:30,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:09:30,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 02:09:30,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 02:09:30,090 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-10-15 02:09:30,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:09:30,146 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-15 02:09:30,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 02:09:30,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-10-15 02:09:30,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:09:30,160 INFO L225 Difference]: With dead ends: 40 [2020-10-15 02:09:30,160 INFO L226 Difference]: Without dead ends: 26 [2020-10-15 02:09:30,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 02:09:30,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-15 02:09:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-15 02:09:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-15 02:09:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-15 02:09:30,213 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-10-15 02:09:30,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:09:30,213 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-15 02:09:30,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 02:09:30,214 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-15 02:09:30,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 02:09:30,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:09:30,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:09:30,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 02:09:30,217 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:09:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:09:30,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-10-15 02:09:30,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:09:30,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368832050] [2020-10-15 02:09:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:09:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:30,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:30,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:30,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:30,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 02:09:30,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 02:09:30,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 282 [2020-10-15 02:09:30,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:30,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:30,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 02:09:30,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-15 02:09:30,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:09:30,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-15 02:09:30,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:09:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:30,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:30,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:30,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 02:09:30,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:30,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:09:30,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:30,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:09:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:30,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:09:30,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-15 02:09:30,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 02:09:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:30,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:30,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:30,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 02:09:30,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:30,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-15 02:09:30,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:30,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:30,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 02:09:30,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-15 02:09:30,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:09:30,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:30,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:09:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:30,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:30,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:30,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 02:09:30,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:30,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 02:09:30,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:30,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:30,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 02:09:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:30,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:09:30,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 02:09:30,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368832050] [2020-10-15 02:09:30,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 02:09:30,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 02:09:30,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376050422] [2020-10-15 02:09:30,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 02:09:30,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:09:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 02:09:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 02:09:30,711 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-10-15 02:09:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:09:30,737 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2020-10-15 02:09:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 02:09:30,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-15 02:09:30,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:09:30,739 INFO L225 Difference]: With dead ends: 44 [2020-10-15 02:09:30,739 INFO L226 Difference]: Without dead ends: 32 [2020-10-15 02:09:30,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 02:09:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-15 02:09:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-15 02:09:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-15 02:09:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-15 02:09:30,750 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-10-15 02:09:30,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:09:30,751 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-15 02:09:30,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 02:09:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-15 02:09:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 02:09:30,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:09:30,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 02:09:30,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 02:09:30,753 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:09:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:09:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-10-15 02:09:30,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:09:30,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607035098] [2020-10-15 02:09:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:09:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:30,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:30,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:30,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 02:09:30,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:30,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-15 02:09:30,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:30,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:30,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 02:09:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-15 02:09:30,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-15 02:09:30,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:30,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:09:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:30,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:30,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:30,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 02:09:30,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:30,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:09:30,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:30,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:09:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:09:30,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:30,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 02:09:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:30,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:31,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 02:09:31,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:31,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-15 02:09:31,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:31,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:31,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 02:09:31,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:31,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 02:09:31,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:31,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:09:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:31,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:31,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 02:09:31,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:31,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-15 02:09:31,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:31,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 02:09:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:31,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:09:31,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 02:09:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 02:09:31,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607035098] [2020-10-15 02:09:31,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 02:09:31,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-15 02:09:31,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659920879] [2020-10-15 02:09:31,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 02:09:31,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:09:31,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 02:09:31,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 02:09:31,116 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2020-10-15 02:09:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:09:31,196 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-15 02:09:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 02:09:31,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-15 02:09:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:09:31,199 INFO L225 Difference]: With dead ends: 36 [2020-10-15 02:09:31,199 INFO L226 Difference]: Without dead ends: 32 [2020-10-15 02:09:31,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-15 02:09:31,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-15 02:09:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-15 02:09:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-15 02:09:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-15 02:09:31,214 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-10-15 02:09:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:09:31,215 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-15 02:09:31,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 02:09:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-15 02:09:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 02:09:31,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:09:31,217 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] [2020-10-15 02:09:31,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 02:09:31,219 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:09:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:09:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1423155149, now seen corresponding path program 1 times [2020-10-15 02:09:31,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:09:31,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100937108] [2020-10-15 02:09:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:09:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:31,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:31,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-15 02:09:31,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 02:09:31,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-15 02:09:31,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:31,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:31,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 02:09:31,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-15 02:09:31,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:09:31,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:31,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 02:09:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:31,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 02:09:31,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:31,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 02:09:31,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:31,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 02:09:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:31,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 02:09:31,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:31,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-15 02:09:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:31,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:31,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-15 02:09:31,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 02:09:31,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-15 02:09:31,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:31,641 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:31,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 02:09:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:31,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 02:09:31,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:31,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:09:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:31,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:31,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-15 02:09:31,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 02:09:31,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-15 02:09:31,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:31,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 02:09:31,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-15 02:09:31,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:09:31,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:31,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-15 02:09:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 02:09:31,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 02:09:31,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 02:09:31,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-15 02:09:31,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 02:09:31,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 02:09:31,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 02:09:31,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 02:09:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 02:09:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 02:09:31,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-15 02:09:31,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 02:09:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 02:09:31,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100937108] [2020-10-15 02:09:31,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 02:09:31,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 02:09:31,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055137379] [2020-10-15 02:09:31,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 02:09:31,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 02:09:31,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 02:09:31,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 02:09:31,793 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2020-10-15 02:09:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 02:09:31,832 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-10-15 02:09:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 02:09:31,833 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-15 02:09:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 02:09:31,835 INFO L225 Difference]: With dead ends: 52 [2020-10-15 02:09:31,835 INFO L226 Difference]: Without dead ends: 38 [2020-10-15 02:09:31,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 02:09:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-15 02:09:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-15 02:09:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-15 02:09:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-15 02:09:31,843 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-10-15 02:09:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 02:09:31,844 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-15 02:09:31,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 02:09:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-15 02:09:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 02:09:31,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 02:09:31,846 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] [2020-10-15 02:09:31,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 02:09:31,846 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 02:09:31,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 02:09:31,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-10-15 02:09:31,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 02:09:31,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486449493] [2020-10-15 02:09:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 02:09:31,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 02:09:31,856 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-15 02:09:31,856 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 02:09:31,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 02:09:31,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 02:09:31 BoogieIcfgContainer [2020-10-15 02:09:31,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 02:09:31,883 INFO L168 Benchmark]: Toolchain (without parser) took 3033.41 ms. Allocated memory was 140.0 MB in the beginning and 244.3 MB in the end (delta: 104.3 MB). Free memory was 103.7 MB in the beginning and 207.4 MB in the end (delta: -103.7 MB). Peak memory consumption was 618.9 kB. Max. memory is 7.1 GB. [2020-10-15 02:09:31,884 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.4 MB in the beginning and 120.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-10-15 02:09:31,885 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.74 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-10-15 02:09:31,886 INFO L168 Benchmark]: Boogie Preprocessor took 109.53 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 93.8 MB in the beginning and 182.8 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-10-15 02:09:31,887 INFO L168 Benchmark]: RCFGBuilder took 272.61 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 170.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-10-15 02:09:31,888 INFO L168 Benchmark]: TraceAbstraction took 2387.41 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 169.6 MB in the beginning and 207.4 MB in the end (delta: -37.8 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-10-15 02:09:31,891 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 140.0 MB. Free memory was 121.4 MB in the beginning and 120.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 240.74 ms. Allocated memory is still 140.0 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.53 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 93.8 MB in the beginning and 182.8 MB in the end (delta: -89.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 272.61 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 170.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2387.41 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 169.6 MB in the beginning and 207.4 MB in the end (delta: -37.8 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 114 SDtfs, 8 SDslu, 480 SDs, 0 SdLazy, 77 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=4, 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, 4 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 4262 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 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...