/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/n.c40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:09:39,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:09:39,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:09:39,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:09:39,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:09:39,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:09:39,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:09:39,298 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:09:39,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:09:39,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:09:39,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:09:39,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:09:39,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:09:39,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:09:39,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:09:39,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:09:39,306 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:09:39,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:09:39,309 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:09:39,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:09:39,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:09:39,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:09:39,318 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:09:39,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:09:39,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:09:39,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:09:39,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:09:39,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:09:39,325 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:09:39,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:09:39,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:09:39,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:09:39,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:09:39,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:09:39,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:09:39,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:09:39,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:09:39,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:09:39,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:09:39,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:09:39,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:09:39,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 11:09:39,386 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:09:39,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:09:39,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:09:39,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:09:39,388 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:09:39,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:09:39,392 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:09:39,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:09:39,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:09:39,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:09:39,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:09:39,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:09:39,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:09:39,393 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:09:39,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:09:39,393 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:09:39,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:09:39,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:09:39,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:09:39,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:09:39,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:09:39,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:09:39,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:09:39,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:09:39,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:09:39,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:09:39,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:09:39,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:09:39,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:09:39,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:09:39,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:09:39,722 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:09:39,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:09:39,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:09:39,728 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:09:39,728 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c40.c [2020-10-13 11:09:39,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/830f39aca/96a6a6c82057409f98ff5ea4ed92c6cd/FLAG2a177c76a [2020-10-13 11:09:40,206 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:09:40,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c40.c [2020-10-13 11:09:40,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/830f39aca/96a6a6c82057409f98ff5ea4ed92c6cd/FLAG2a177c76a [2020-10-13 11:09:40,652 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/830f39aca/96a6a6c82057409f98ff5ea4ed92c6cd [2020-10-13 11:09:40,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:09:40,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:09:40,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:09:40,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:09:40,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:09:40,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:09:40" (1/1) ... [2020-10-13 11:09:40,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454cf358 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40, skipping insertion in model container [2020-10-13 11:09:40,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:09:40" (1/1) ... [2020-10-13 11:09:40,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:09:40,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:09:40,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:09:40,888 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:09:40,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:09:40,929 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:09:40,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40 WrapperNode [2020-10-13 11:09:40,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:09:40,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:09:40,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:09:40,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:09:41,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40" (1/1) ... [2020-10-13 11:09:41,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40" (1/1) ... [2020-10-13 11:09:41,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40" (1/1) ... [2020-10-13 11:09:41,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40" (1/1) ... [2020-10-13 11:09:41,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40" (1/1) ... [2020-10-13 11:09:41,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40" (1/1) ... [2020-10-13 11:09:41,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40" (1/1) ... [2020-10-13 11:09:41,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:09:41,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:09:41,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:09:41,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:09:41,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:09:41,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:09:41,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:09:41,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:09:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:09:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 11:09:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:09:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 11:09:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 11:09:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:09:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 11:09:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:09:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 11:09:41,412 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:09:41,413 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 11:09:41,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:09:41 BoogieIcfgContainer [2020-10-13 11:09:41,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:09:41,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:09:41,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:09:41,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:09:41,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:09:40" (1/3) ... [2020-10-13 11:09:41,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9723de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:09:41, skipping insertion in model container [2020-10-13 11:09:41,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:09:40" (2/3) ... [2020-10-13 11:09:41,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9723de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:09:41, skipping insertion in model container [2020-10-13 11:09:41,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:09:41" (3/3) ... [2020-10-13 11:09:41,424 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c40.c [2020-10-13 11:09:41,433 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:09:41,439 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:09:41,451 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:09:41,472 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:09:41,473 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:09:41,473 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:09:41,473 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:09:41,473 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:09:41,473 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:09:41,473 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:09:41,473 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:09:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-13 11:09:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-13 11:09:41,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:41,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:41,494 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:41,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1526440521, now seen corresponding path program 1 times [2020-10-13 11:09:41,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:41,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301039324] [2020-10-13 11:09:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:41,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:41,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:41,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:41,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:09:41,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:09:41,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-13 11:09:41,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:41,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 11:09:41,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:41,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 11:09:42,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:42,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:42,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:42,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:42,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:42,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 11:09:42,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:42,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:42,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:42,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:42,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:09:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:42,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301039324] [2020-10-13 11:09:42,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:09:42,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:09:42,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526043944] [2020-10-13 11:09:42,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:09:42,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:42,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:09:42,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:09:42,103 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-10-13 11:09:42,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:42,166 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-10-13 11:09:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:09:42,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-13 11:09:42,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:42,178 INFO L225 Difference]: With dead ends: 28 [2020-10-13 11:09:42,178 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 11:09:42,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:09:42,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 11:09:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 11:09:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 11:09:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-13 11:09:42,217 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-10-13 11:09:42,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:42,217 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-13 11:09:42,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:09:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-13 11:09:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 11:09:42,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:42,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:42,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:09:42,219 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:42,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:42,220 INFO L82 PathProgramCache]: Analyzing trace with hash -281053369, now seen corresponding path program 1 times [2020-10-13 11:09:42,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:42,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050194940] [2020-10-13 11:09:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:42,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:42,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 11:09:42,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:42,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-13 11:09:42,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:09:42,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:09:42,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:09:42,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:42,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:42,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:42,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:42,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:42,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:42,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 11:09:42,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:42,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:42,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:42,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:09:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:42,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050194940] [2020-10-13 11:09:42,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:09:42,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:09:42,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564550562] [2020-10-13 11:09:42,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:09:42,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:09:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:09:42,374 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-13 11:09:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:42,467 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-10-13 11:09:42,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:09:42,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-13 11:09:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:42,468 INFO L225 Difference]: With dead ends: 20 [2020-10-13 11:09:42,469 INFO L226 Difference]: Without dead ends: 15 [2020-10-13 11:09:42,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:09:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-13 11:09:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-13 11:09:42,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-13 11:09:42,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-13 11:09:42,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-13 11:09:42,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:42,476 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-13 11:09:42,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:09:42,476 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-13 11:09:42,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 11:09:42,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:42,477 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:42,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:09:42,478 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:42,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:42,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1999502604, now seen corresponding path program 1 times [2020-10-13 11:09:42,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:42,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193535782] [2020-10-13 11:09:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:42,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:42,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:42,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:42,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:09:42,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:09:42,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-13 11:09:42,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:42,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:09:42,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:09:42,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:09:42,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 11:09:42,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:43,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:43,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:43,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:43,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:43,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:09:43,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:43,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:09:43,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:43,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:09:43,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:09:43,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193535782] [2020-10-13 11:09:43,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:43,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:09:43,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985407464] [2020-10-13 11:09:43,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:09:43,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:43,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:09:43,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:09:43,023 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-10-13 11:09:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:43,160 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-13 11:09:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:09:43,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-13 11:09:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:43,162 INFO L225 Difference]: With dead ends: 22 [2020-10-13 11:09:43,162 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 11:09:43,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:09:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 11:09:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 11:09:43,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 11:09:43,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-13 11:09:43,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-13 11:09:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:43,173 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-13 11:09:43,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:09:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-13 11:09:43,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 11:09:43,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:43,174 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:43,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:09:43,174 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1114495599, now seen corresponding path program 2 times [2020-10-13 11:09:43,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:43,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229658622] [2020-10-13 11:09:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:43,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:43,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:43,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:43,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:43,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 11:09:43,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:09:43,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-13 11:09:43,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:43,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:09:43,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:09:43,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:09:43,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:09:43,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:43,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:43,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:43,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:43,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:43,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 11:09:43,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:09:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:43,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:09:43,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:09:43,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 11:09:43,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229658622] [2020-10-13 11:09:43,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:09:43,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:09:43,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334025529] [2020-10-13 11:09:43,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:09:43,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:43,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:09:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:09:43,674 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-10-13 11:09:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:43,749 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-10-13 11:09:43,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:09:43,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-13 11:09:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:43,749 INFO L225 Difference]: With dead ends: 17 [2020-10-13 11:09:43,750 INFO L226 Difference]: Without dead ends: 0 [2020-10-13 11:09:43,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:09:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-13 11:09:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-13 11:09:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-13 11:09:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-13 11:09:43,751 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-10-13 11:09:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:43,752 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-13 11:09:43,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:09:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-13 11:09:43,752 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-13 11:09:43,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:09:43,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-13 11:09:43,866 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-13 11:09:43,866 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~j~0 |old(~j~0)|) (= |~#x~0.offset| |old(~#x~0.offset)|) (= |~#y~0.offset| |old(~#y~0.offset)|) (= ~i~0 |old(~i~0)|) (= |old(#length)| |#length|) (= ~k~0 |old(~k~0)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.base| |old(#NULL.base)|) (= |~#x~0.base| |old(~#x~0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |~#y~0.base| |old(~#y~0.base)|)) [2020-10-13 11:09:43,866 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-13 11:09:43,867 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-13 11:09:43,867 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (= (select |#memory_int| |~#x~0.base|) ((as const (Array Int Int)) 0)) (<= ~i~0 0)) [2020-10-13 11:09:43,867 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-13 11:09:43,867 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-13 11:09:43,867 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 23) no Hoare annotation was computed. [2020-10-13 11:09:43,867 INFO L268 CegarLoopResult]: For program point L19(lines 19 20) no Hoare annotation was computed. [2020-10-13 11:09:43,868 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 23) no Hoare annotation was computed. [2020-10-13 11:09:43,868 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2020-10-13 11:09:43,868 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 8 23) the Hoare annotation is: (or (not (= ((as const (Array Int Int)) 0) (select |old(#memory_int)| |~#x~0.base|))) (not (<= |old(~i~0)| 0)) (and (= ~i~0 |old(~i~0)|) (= ~k~0 |old(~k~0)|) (= |#memory_int| |old(#memory_int)|))) [2020-10-13 11:09:43,868 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-10-13 11:09:43,868 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-13 11:09:43,869 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2020-10-13 11:09:43,869 INFO L268 CegarLoopResult]: For program point L12-1(lines 12 15) no Hoare annotation was computed. [2020-10-13 11:09:43,869 INFO L264 CegarLoopResult]: At program point L12-3(lines 12 15) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (and (= (select |#memory_int| |~#x~0.base|) .cse0) (<= ~i~0 0)) (not (= .cse0 (select |old(#memory_int)| |~#x~0.base|))) (not (<= |old(~i~0)| 0)))) [2020-10-13 11:09:43,869 INFO L268 CegarLoopResult]: For program point L12-4(lines 12 15) no Hoare annotation was computed. [2020-10-13 11:09:43,879 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:394) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:89) at de.uni_freiburg.informatik.ultimate.core.lib.results.InvariantResult.getLongDescription(InvariantResult.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportResult(TraceAbstractionStarter.java:693) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.createInvariantResults(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:217) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-13 11:09:43,884 INFO L168 Benchmark]: Toolchain (without parser) took 3221.96 ms. Allocated memory was 148.4 MB in the beginning and 242.7 MB in the end (delta: 94.4 MB). Free memory was 104.8 MB in the beginning and 131.2 MB in the end (delta: -26.4 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:43,885 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-10-13 11:09:43,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.98 ms. Allocated memory is still 148.4 MB. Free memory was 104.4 MB in the beginning and 94.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:43,887 INFO L168 Benchmark]: Boogie Preprocessor took 139.44 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 94.5 MB in the beginning and 181.9 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:43,888 INFO L168 Benchmark]: RCFGBuilder took 347.28 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 168.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:43,889 INFO L168 Benchmark]: TraceAbstraction took 2462.79 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 167.3 MB in the beginning and 131.2 MB in the end (delta: 36.1 MB). Peak memory consumption was 74.3 MB. Max. memory is 7.1 GB. [2020-10-13 11:09:43,893 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.98 ms. Allocated memory is still 148.4 MB. Free memory was 104.4 MB in the beginning and 94.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.44 ms. Allocated memory was 148.4 MB in the beginning and 204.5 MB in the end (delta: 56.1 MB). Free memory was 94.5 MB in the beginning and 181.9 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.28 ms. Allocated memory is still 204.5 MB. Free memory was 181.9 MB in the beginning and 168.2 MB in the end (delta: 13.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2462.79 ms. Allocated memory was 204.5 MB in the beginning and 242.7 MB in the end (delta: 38.3 MB). Free memory was 167.3 MB in the beginning and 131.2 MB in the end (delta: 36.1 MB). Peak memory consumption was 74.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:238) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...