/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 12:36:28,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 12:36:28,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 12:36:29,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 12:36:29,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 12:36:29,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 12:36:29,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 12:36:29,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 12:36:29,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 12:36:29,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 12:36:29,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 12:36:29,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 12:36:29,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 12:36:29,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 12:36:29,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 12:36:29,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 12:36:29,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 12:36:29,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 12:36:29,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 12:36:29,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 12:36:29,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 12:36:29,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 12:36:29,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 12:36:29,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 12:36:29,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 12:36:29,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 12:36:29,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 12:36:29,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 12:36:29,074 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 12:36:29,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 12:36:29,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 12:36:29,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 12:36:29,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 12:36:29,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 12:36:29,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 12:36:29,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 12:36:29,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 12:36:29,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 12:36:29,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 12:36:29,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 12:36:29,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 12:36:29,099 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 [2020-09-21 12:36:29,150 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 12:36:29,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 12:36:29,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 12:36:29,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 12:36:29,153 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 12:36:29,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 12:36:29,153 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 12:36:29,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 12:36:29,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 12:36:29,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 12:36:29,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 12:36:29,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 12:36:29,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 12:36:29,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 12:36:29,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 12:36:29,157 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 12:36:29,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 12:36:29,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 12:36:29,157 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 12:36:29,157 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 12:36:29,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 12:36:29,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 12:36:29,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 12:36:29,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 12:36:29,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 12:36:29,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 12:36:29,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 12:36:29,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 12:36:29,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 12:36:29,159 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-21 12:36:29,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 12:36:29,649 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 12:36:29,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 12:36:29,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 12:36:29,658 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 12:36:29,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-21 12:36:29,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd6bda885/87ff2b70daa34e3aaf6885a610280d81/FLAG69d416a9b [2020-09-21 12:36:30,295 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 12:36:30,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gsv2008.i [2020-09-21 12:36:30,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd6bda885/87ff2b70daa34e3aaf6885a610280d81/FLAG69d416a9b [2020-09-21 12:36:30,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd6bda885/87ff2b70daa34e3aaf6885a610280d81 [2020-09-21 12:36:30,654 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 12:36:30,661 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 12:36:30,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 12:36:30,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 12:36:30,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 12:36:30,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:30" (1/1) ... [2020-09-21 12:36:30,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@337988d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:30, skipping insertion in model container [2020-09-21 12:36:30,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:36:30" (1/1) ... [2020-09-21 12:36:30,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 12:36:30,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 12:36:30,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:36:31,001 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 12:36:31,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 12:36:31,043 INFO L208 MainTranslator]: Completed translation [2020-09-21 12:36:31,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31 WrapperNode [2020-09-21 12:36:31,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 12:36:31,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 12:36:31,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 12:36:31,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 12:36:31,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31" (1/1) ... [2020-09-21 12:36:31,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31" (1/1) ... [2020-09-21 12:36:31,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31" (1/1) ... [2020-09-21 12:36:31,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31" (1/1) ... [2020-09-21 12:36:31,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31" (1/1) ... [2020-09-21 12:36:31,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31" (1/1) ... [2020-09-21 12:36:31,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31" (1/1) ... [2020-09-21 12:36:31,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 12:36:31,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 12:36:31,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 12:36:31,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 12:36:31,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31" (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 [2020-09-21 12:36:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 12:36:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 12:36:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 12:36:31,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 12:36:31,262 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 12:36:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 12:36:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 12:36:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 12:36:31,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 12:36:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 12:36:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 12:36:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 12:36:31,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 12:36:31,489 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 12:36:31,489 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 12:36:31,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:31 BoogieIcfgContainer [2020-09-21 12:36:31,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 12:36:31,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 12:36:31,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 12:36:31,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 12:36:31,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:36:30" (1/3) ... [2020-09-21 12:36:31,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563be7a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:31, skipping insertion in model container [2020-09-21 12:36:31,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:36:31" (2/3) ... [2020-09-21 12:36:31,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@563be7a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:36:31, skipping insertion in model container [2020-09-21 12:36:31,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:36:31" (3/3) ... [2020-09-21 12:36:31,505 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2020-09-21 12:36:31,516 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 12:36:31,527 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 12:36:31,548 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 12:36:31,576 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 12:36:31,576 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 12:36:31,576 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 12:36:31,576 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 12:36:31,576 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 12:36:31,577 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 12:36:31,577 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 12:36:31,577 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 12:36:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 12:36:31,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 12:36:31,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:31,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:31,605 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:31,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:31,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times [2020-09-21 12:36:31,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:31,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868537789] [2020-09-21 12:36:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:31,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:31,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:31,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 12:36:31,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:31,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-09-21 12:36:31,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:31,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 12:36:31,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 12:36:31,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-09-21 12:36:31,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 12:36:31,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:31,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:31,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:31,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:31,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:31,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:36:31,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:31,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:31,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868537789] [2020-09-21 12:36:31,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:36:31,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 12:36:31,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341965249] [2020-09-21 12:36:31,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 12:36:31,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:31,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 12:36:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:36:31,920 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-09-21 12:36:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:31,962 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-09-21 12:36:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 12:36:31,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-21 12:36:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:31,976 INFO L225 Difference]: With dead ends: 34 [2020-09-21 12:36:31,976 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 12:36:31,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 12:36:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 12:36:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 12:36:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 12:36:32,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-09-21 12:36:32,042 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-09-21 12:36:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:32,043 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-09-21 12:36:32,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 12:36:32,043 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-09-21 12:36:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 12:36:32,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 12:36:32,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 12:36:32,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 12:36:32,046 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 12:36:32,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 12:36:32,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times [2020-09-21 12:36:32,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 12:36:32,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249162824] [2020-09-21 12:36:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 12:36:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:32,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:32,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:32,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 12:36:32,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:32,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-09-21 12:36:32,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:32,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 12:36:32,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 12:36:32,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-21 12:36:32,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:32,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 12:36:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 12:36:32,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-21 12:36:32,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-21 12:36:32,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 12:36:32,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 12:36:32,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 12:36:32,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-21 12:36:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 12:36:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 12:36:32,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 12:36:32,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 12:36:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 12:36:32,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249162824] [2020-09-21 12:36:32,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 12:36:32,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-21 12:36:32,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823280160] [2020-09-21 12:36:32,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 12:36:32,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 12:36:32,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 12:36:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-21 12:36:32,444 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2020-09-21 12:36:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 12:36:32,518 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-09-21 12:36:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 12:36:32,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-09-21 12:36:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 12:36:32,519 INFO L225 Difference]: With dead ends: 13 [2020-09-21 12:36:32,519 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 12:36:32,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 12:36:32,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 12:36:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 12:36:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 12:36:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 12:36:32,522 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2020-09-21 12:36:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 12:36:32,522 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 12:36:32,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 12:36:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 12:36:32,523 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 12:36:32,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 12:36:32,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 12:36:32,570 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 12:36:32,571 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:36:32,571 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 12:36:32,571 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 12:36:32,571 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 12:36:32,571 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 12:36:32,572 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 12:36:32,572 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 12:36:32,572 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 12:36:32,572 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 12:36:32,572 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 24) the Hoare annotation is: true [2020-09-21 12:36:32,573 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 24) no Hoare annotation was computed. [2020-09-21 12:36:32,573 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-09-21 12:36:32,573 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-21 12:36:32,573 INFO L264 CegarLoopResult]: At program point L18-2(lines 18 21) the Hoare annotation is: (or (<= (+ main_~x~0 50) 0) (<= (+ main_~x~0 2) main_~y~0)) [2020-09-21 12:36:32,574 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 21) the Hoare annotation is: (and (<= 2 main_~y~0) (<= (+ main_~x~0 2) main_~y~0)) [2020-09-21 12:36:32,574 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 24) no Hoare annotation was computed. [2020-09-21 12:36:32,574 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 12:36:32,574 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 12:36:32,574 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 12:36:32,575 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 12:36:32,575 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 12:36:32,575 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 12:36:32,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:36:32 BoogieIcfgContainer [2020-09-21 12:36:32,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 12:36:32,600 INFO L168 Benchmark]: Toolchain (without parser) took 1942.23 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 102.5 MB in the beginning and 120.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:32,601 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 12:36:32,602 INFO L168 Benchmark]: CACSL2BoogieTranslator took 381.97 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 92.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:32,604 INFO L168 Benchmark]: Boogie Preprocessor took 131.34 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 182.1 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:32,605 INFO L168 Benchmark]: RCFGBuilder took 318.32 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 168.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:32,606 INFO L168 Benchmark]: TraceAbstraction took 1100.82 ms. Allocated memory is still 202.9 MB. Free memory was 168.3 MB in the beginning and 120.7 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. [2020-09-21 12:36:32,610 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 381.97 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 92.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.34 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 182.1 MB in the end (delta: -89.6 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.32 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 168.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1100.82 ms. Allocated memory is still 202.9 MB. Free memory was 168.3 MB in the beginning and 120.7 MB in the end (delta: 47.6 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: x + 50 <= 0 || x + 2 <= y - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 4 SDslu, 40 SDs, 0 SdLazy, 18 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 8 PreInvPairs, 10 NumberOfFragments, 25 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 433 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...