/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=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-c90d42b [2020-09-25 02:18:56,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:18:56,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:18:56,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:18:56,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:18:56,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:18:56,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:18:56,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:18:56,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:18:56,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:18:56,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:18:56,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:18:56,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:18:56,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:18:56,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:18:56,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:18:56,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:18:56,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:18:56,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:18:56,664 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:18:56,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:18:56,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:18:56,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:18:56,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:18:56,672 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:18:56,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:18:56,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:18:56,674 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:18:56,674 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:18:56,675 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:18:56,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:18:56,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:18:56,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:18:56,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:18:56,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:18:56,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:18:56,681 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:18:56,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:18:56,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:18:56,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:18:56,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:18:56,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 02:18:56,711 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:18:56,711 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:18:56,712 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:18:56,713 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:18:56,713 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:18:56,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:18:56,713 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:18:56,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:18:56,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:18:56,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:18:56,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:18:56,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:18:56,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:18:56,715 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:18:56,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:18:56,715 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:18:56,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:18:56,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:18:56,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:18:56,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:18:56,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:18:56,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:18:56,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:18:56,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:18:56,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:18:56,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:18:56,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:18:56,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:18:56,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:18:56,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-09-25 02:18:57,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:18:57,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:18:57,211 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:18:57,213 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:18:57,214 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:18:57,215 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c40.c [2020-09-25 02:18:57,298 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ed15c4a3/5bf5041616c44c96bea8b9c0eb040a31/FLAG5ed925b66 [2020-09-25 02:18:57,909 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:18:57,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/n.c40.c [2020-09-25 02:18:57,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ed15c4a3/5bf5041616c44c96bea8b9c0eb040a31/FLAG5ed925b66 [2020-09-25 02:18:58,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9ed15c4a3/5bf5041616c44c96bea8b9c0eb040a31 [2020-09-25 02:18:58,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:18:58,248 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:18:58,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:18:58,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:18:58,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:18:58,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:18:58" (1/1) ... [2020-09-25 02:18:58,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8d9ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58, skipping insertion in model container [2020-09-25 02:18:58,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:18:58" (1/1) ... [2020-09-25 02:18:58,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:18:58,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:18:58,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:18:58,535 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:18:58,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:18:58,577 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:18:58,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58 WrapperNode [2020-09-25 02:18:58,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:18:58,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:18:58,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:18:58,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:18:58,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58" (1/1) ... [2020-09-25 02:18:58,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58" (1/1) ... [2020-09-25 02:18:58,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58" (1/1) ... [2020-09-25 02:18:58,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58" (1/1) ... [2020-09-25 02:18:58,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58" (1/1) ... [2020-09-25 02:18:58,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58" (1/1) ... [2020-09-25 02:18:58,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58" (1/1) ... [2020-09-25 02:18:58,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:18:58,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:18:58,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:18:58,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:18:58,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:18:58,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:18:58,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:18:58,772 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:18:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:18:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 02:18:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:18:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 02:18:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 02:18:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:18:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:18:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:18:58,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:18:59,068 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:18:59,068 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 02:18:59,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:18:59 BoogieIcfgContainer [2020-09-25 02:18:59,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:18:59,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:18:59,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:18:59,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:18:59,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:18:58" (1/3) ... [2020-09-25 02:18:59,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663db04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:18:59, skipping insertion in model container [2020-09-25 02:18:59,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:18:58" (2/3) ... [2020-09-25 02:18:59,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663db04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:18:59, skipping insertion in model container [2020-09-25 02:18:59,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:18:59" (3/3) ... [2020-09-25 02:18:59,084 INFO L109 eAbstractionObserver]: Analyzing ICFG n.c40.c [2020-09-25 02:18:59,097 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:18:59,107 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:18:59,131 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:18:59,159 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:18:59,159 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:18:59,159 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:18:59,159 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:18:59,160 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:18:59,160 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:18:59,160 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:18:59,160 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:18:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-09-25 02:18:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-25 02:18:59,188 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:59,189 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, 1, 1, 1, 1, 1] [2020-09-25 02:18:59,190 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:59,196 INFO L82 PathProgramCache]: Analyzing trace with hash 814682400, now seen corresponding path program 1 times [2020-09-25 02:18:59,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:59,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12046498] [2020-09-25 02:18:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:59,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:59,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:59,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:59,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 02:18:59,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:18:59,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-09-25 02:18:59,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:59,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:59,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 02:18:59,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:59,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 02:18:59,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:59,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:59,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:59,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 02:18:59,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:59,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 02:18:59,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:59,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:59,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:18:59,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12046498] [2020-09-25 02:18:59,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:18:59,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 02:18:59,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533974132] [2020-09-25 02:18:59,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 02:18:59,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:59,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 02:18:59,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 02:18:59,891 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-09-25 02:19:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:00,014 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-25 02:19:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 02:19:00,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-09-25 02:19:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:00,029 INFO L225 Difference]: With dead ends: 54 [2020-09-25 02:19:00,029 INFO L226 Difference]: Without dead ends: 35 [2020-09-25 02:19:00,034 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 [2020-09-25 02:19:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-25 02:19:00,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-25 02:19:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-25 02:19:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-09-25 02:19:00,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 25 [2020-09-25 02:19:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:00,081 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-09-25 02:19:00,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 02:19:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-09-25 02:19:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 02:19:00,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:00,083 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:00,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:19:00,083 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1790244750, now seen corresponding path program 1 times [2020-09-25 02:19:00,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:00,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742085674] [2020-09-25 02:19:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:00,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:00,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:00,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-25 02:19:00,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:00,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-09-25 02:19:00,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:19:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 02:19:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 02:19:00,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:00,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:00,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:00,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:00,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 02:19:00,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:00,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-25 02:19:00,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:00,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:00,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:00,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:00,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:00,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742085674] [2020-09-25 02:19:00,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:00,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:19:00,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220098757] [2020-09-25 02:19:00,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:19:00,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:00,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:19:00,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:19:00,376 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 4 states. [2020-09-25 02:19:00,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:00,523 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-25 02:19:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:19:00,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-09-25 02:19:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:00,525 INFO L225 Difference]: With dead ends: 51 [2020-09-25 02:19:00,525 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 02:19:00,526 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 [2020-09-25 02:19:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 02:19:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-09-25 02:19:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-25 02:19:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-25 02:19:00,534 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 27 [2020-09-25 02:19:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:00,535 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-25 02:19:00,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:19:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-25 02:19:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 02:19:00,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:00,537 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:00,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:19:00,537 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash -189710638, now seen corresponding path program 1 times [2020-09-25 02:19:00,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:00,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741497173] [2020-09-25 02:19:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:00,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:00,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:01,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:01,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 02:19:01,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:19:01,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1235 [2020-09-25 02:19:01,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 02:19:01,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 02:19:01,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 02:19:01,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:19:02,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:02,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:02,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 02:19:02,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:02,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-25 02:19:02,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:19:02,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:02,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:19:02,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:19:02,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741497173] [2020-09-25 02:19:02,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:19:02,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 02:19:02,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672279936] [2020-09-25 02:19:02,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 02:19:02,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 02:19:02,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:19:02,093 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-09-25 02:19:02,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:02,589 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-09-25 02:19:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 02:19:02,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-09-25 02:19:02,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:02,592 INFO L225 Difference]: With dead ends: 60 [2020-09-25 02:19:02,592 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 02:19:02,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-25 02:19:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 02:19:02,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-09-25 02:19:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-25 02:19:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-09-25 02:19:02,601 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 36 [2020-09-25 02:19:02,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:02,602 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-09-25 02:19:02,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 02:19:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-09-25 02:19:02,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-09-25 02:19:02,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:19:02,605 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:19:02,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:19:02,605 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:19:02,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:19:02,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1586350990, now seen corresponding path program 2 times [2020-09-25 02:19:02,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:19:02,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219572988] [2020-09-25 02:19:02,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:19:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:02,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:02,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:03,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:04,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 02:19:07,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:19:07,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 02:19:07,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:19:07,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-25 02:19:07,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 02:19:07,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:19:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:19:07,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:19:07,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:19:07,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-25 02:19:07,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:19:07,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-25 02:19:07,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:19:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 02:19:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:19:07,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:19:07,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:19:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 02:19:07,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219572988] [2020-09-25 02:19:07,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:19:07,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:19:07,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438321791] [2020-09-25 02:19:07,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:19:07,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:19:07,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:19:07,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:19:07,820 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 5 states. [2020-09-25 02:19:07,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:19:07,920 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-25 02:19:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 02:19:07,925 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-09-25 02:19:07,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:19:07,926 INFO L225 Difference]: With dead ends: 46 [2020-09-25 02:19:07,926 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 02:19:07,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:19:07,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 02:19:07,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 02:19:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 02:19:07,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 02:19:07,930 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2020-09-25 02:19:07,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:19:07,931 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 02:19:07,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:19:07,931 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 02:19:07,931 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 02:19:07,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:19:07,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 02:19:08,119 INFO L268 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-09-25 02:19:08,120 INFO L268 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-09-25 02:19:08,120 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-09-25 02:19:08,120 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)|)) [2020-09-25 02:19:08,121 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-09-25 02:19:08,121 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-25 02:19:08,121 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-09-25 02:19:08,121 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-09-25 02:19:08,121 INFO L268 CegarLoopResult]: For program point L6-2(line 6) no Hoare annotation was computed. [2020-09-25 02:19:08,121 INFO L268 CegarLoopResult]: For program point L5-2(line 5) no Hoare annotation was computed. [2020-09-25 02:19:08,122 INFO L268 CegarLoopResult]: For program point L5-3(line 5) no Hoare annotation was computed. [2020-09-25 02:19:08,122 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:19:08,122 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 02:19:08,122 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)) [2020-09-25 02:19:08,122 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 02:19:08,123 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 02:19:08,123 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 8 23) no Hoare annotation was computed. [2020-09-25 02:19:08,123 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-25 02:19:08,123 INFO L268 CegarLoopResult]: For program point L19-1(lines 19 20) no Hoare annotation was computed. [2020-09-25 02:19:08,123 INFO L268 CegarLoopResult]: For program point L19-2(line 19) no Hoare annotation was computed. [2020-09-25 02:19:08,123 INFO L268 CegarLoopResult]: For program point L19-4(line 19) no Hoare annotation was computed. [2020-09-25 02:19:08,123 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-09-25 02:19:08,124 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 8 23) no Hoare annotation was computed. [2020-09-25 02:19:08,124 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-09-25 02:19:08,124 INFO L268 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-09-25 02:19:08,124 INFO L268 CegarLoopResult]: For program point L13-2(line 13) no Hoare annotation was computed. [2020-09-25 02:19:08,125 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-09-25 02:19:08,125 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-09-25 02:19:08,125 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2020-09-25 02:19:08,125 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)|))) [2020-09-25 02:19:08,126 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 02:19:08,126 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-09-25 02:19:08,126 INFO L268 CegarLoopResult]: For program point L16(lines 8 23) no Hoare annotation was computed. [2020-09-25 02:19:08,126 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-09-25 02:19:08,126 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-09-25 02:19:08,126 INFO L268 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-09-25 02:19:08,126 INFO L268 CegarLoopResult]: For program point L12-1(lines 12 15) no Hoare annotation was computed. [2020-09-25 02:19:08,127 INFO L268 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-09-25 02:19:08,127 INFO L268 CegarLoopResult]: For program point L12-4(line 12) no Hoare annotation was computed. [2020-09-25 02:19:08,127 INFO L264 CegarLoopResult]: At program point L12-5(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)))) [2020-09-25 02:19:08,128 INFO L268 CegarLoopResult]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2020-09-25 02:19:08,142 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) [2020-09-25 02:19:08,151 INFO L168 Benchmark]: Toolchain (without parser) took 9906.21 ms. Allocated memory was 138.4 MB in the beginning and 287.8 MB in the end (delta: 149.4 MB). Free memory was 100.3 MB in the beginning and 172.9 MB in the end (delta: -72.6 MB). Peak memory consumption was 76.8 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:08,153 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-09-25 02:19:08,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.89 ms. Allocated memory is still 138.4 MB. Free memory was 99.6 MB in the beginning and 89.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:08,158 INFO L168 Benchmark]: Boogie Preprocessor took 117.88 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 89.7 MB in the beginning and 178.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:08,164 INFO L168 Benchmark]: RCFGBuilder took 378.31 ms. Allocated memory is still 200.3 MB. Free memory was 178.2 MB in the beginning and 162.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:08,166 INFO L168 Benchmark]: TraceAbstraction took 9071.09 ms. Allocated memory was 200.3 MB in the beginning and 287.8 MB in the end (delta: 87.6 MB). Free memory was 161.9 MB in the beginning and 172.9 MB in the end (delta: -11.1 MB). Peak memory consumption was 76.5 MB. Max. memory is 7.1 GB. [2020-09-25 02:19:08,179 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.4 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 328.89 ms. Allocated memory is still 138.4 MB. Free memory was 99.6 MB in the beginning and 89.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.88 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 89.7 MB in the beginning and 178.2 MB in the end (delta: -88.5 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 378.31 ms. Allocated memory is still 200.3 MB. Free memory was 178.2 MB in the beginning and 162.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9071.09 ms. Allocated memory was 200.3 MB in the beginning and 287.8 MB in the end (delta: 87.6 MB). Free memory was 161.9 MB in the beginning and 172.9 MB in the end (delta: -11.1 MB). Peak memory consumption was 76.5 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...