/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-lit/gcnr2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:40:51,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:40:51,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:40:51,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:40:51,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:40:51,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:40:51,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:40:51,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:40:51,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:40:51,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:40:51,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:40:51,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:40:51,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:40:51,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:40:51,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:40:51,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:40:51,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:40:51,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:40:51,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:40:51,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:40:51,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:40:51,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:40:51,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:40:51,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:40:51,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:40:51,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:40:51,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:40:51,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:40:51,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:40:51,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:40:51,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:40:51,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:40:51,166 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:40:51,167 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:40:51,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:40:51,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:40:51,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:40:51,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:40:51,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:40:51,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:40:51,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:40:51,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:40:51,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:40:51,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:40:51,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:40:51,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:40:51,220 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:40:51,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:40:51,220 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:40:51,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:40:51,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:40:51,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:40:51,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:40:51,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:40:51,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:40:51,222 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:40:51,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:40:51,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:40:51,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:40:51,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:40:51,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:40:51,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:40:51,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:40:51,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:40:51,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:40:51,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:40:51,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:40:51,224 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:40:51,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:40:51,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:40:51,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:40:51,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:40:51,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:40:51,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:40:51,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:40:51,674 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:40:51,675 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:40:51,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-10-27 01:40:51,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1407ea09b/ec6fe5ba827b426cbd03f7f7846ddff9/FLAGe2f457da5 [2020-10-27 01:40:52,364 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:40:52,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-10-27 01:40:52,380 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1407ea09b/ec6fe5ba827b426cbd03f7f7846ddff9/FLAGe2f457da5 [2020-10-27 01:40:52,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1407ea09b/ec6fe5ba827b426cbd03f7f7846ddff9 [2020-10-27 01:40:52,739 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:40:52,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:40:52,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:52,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:40:52,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:40:52,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:52" (1/1) ... [2020-10-27 01:40:52,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@139b64ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:52, skipping insertion in model container [2020-10-27 01:40:52,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:40:52" (1/1) ... [2020-10-27 01:40:52,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:40:52,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:40:52,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:52,985 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:40:53,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:40:53,028 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:40:53,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53 WrapperNode [2020-10-27 01:40:53,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:40:53,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:40:53,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:40:53,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:40:53,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53" (1/1) ... [2020-10-27 01:40:53,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53" (1/1) ... [2020-10-27 01:40:53,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53" (1/1) ... [2020-10-27 01:40:53,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53" (1/1) ... [2020-10-27 01:40:53,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53" (1/1) ... [2020-10-27 01:40:53,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53" (1/1) ... [2020-10-27 01:40:53,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53" (1/1) ... [2020-10-27 01:40:53,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:40:53,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:40:53,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:40:53,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:40:53,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:40:53,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:40:53,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:40:53,174 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:40:53,174 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:40:53,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:40:53,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:40:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:40:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:40:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:40:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:40:53,175 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:40:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:40:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:40:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:40:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:40:53,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:40:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:40:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:40:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:40:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:40:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:40:53,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:40:53,543 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:40:53,543 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:40:53,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:53 BoogieIcfgContainer [2020-10-27 01:40:53,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:40:53,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:40:53,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:40:53,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:40:53,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:40:52" (1/3) ... [2020-10-27 01:40:53,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573cddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:53, skipping insertion in model container [2020-10-27 01:40:53,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:40:53" (2/3) ... [2020-10-27 01:40:53,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573cddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:40:53, skipping insertion in model container [2020-10-27 01:40:53,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:40:53" (3/3) ... [2020-10-27 01:40:53,609 INFO L111 eAbstractionObserver]: Analyzing ICFG gcnr2008.i [2020-10-27 01:40:53,631 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:40:53,637 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:40:53,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:40:53,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:40:53,711 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:40:53,711 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:40:53,711 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:40:53,712 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:40:53,712 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:40:53,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:40:53,712 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:40:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-27 01:40:53,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:40:53,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:53,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:53,762 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:53,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2010393491, now seen corresponding path program 1 times [2020-10-27 01:40:53,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:53,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912090117] [2020-10-27 01:40:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:54,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:40:54,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:54,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-27 01:40:54,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:40:54,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:54,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:40:54,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:40:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:40:54,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:40:54,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:40:54,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:40:54,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:40:54,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:40:54,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:40:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:40:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:40:54,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:40:54,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:40:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:40:54,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912090117] [2020-10-27 01:40:54,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:40:54,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:40:54,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833926311] [2020-10-27 01:40:54,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:40:54,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:40:54,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:40:54,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:40:54,340 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-10-27 01:40:54,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:40:54,408 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-10-27 01:40:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:40:54,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-10-27 01:40:54,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:40:54,421 INFO L225 Difference]: With dead ends: 44 [2020-10-27 01:40:54,421 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 01:40:54,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:40:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 01:40:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-27 01:40:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:40:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-27 01:40:54,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2020-10-27 01:40:54,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:40:54,475 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-27 01:40:54,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:40:54,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-27 01:40:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 01:40:54,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:40:54,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:40:54,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:40:54,477 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:40:54,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:40:54,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2109254924, now seen corresponding path program 1 times [2020-10-27 01:40:54,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:40:54,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706495800] [2020-10-27 01:40:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:40:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:40:54,504 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:40:54,504 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:40:54,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:40:54,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:40:54 BoogieIcfgContainer [2020-10-27 01:40:54,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:40:54,532 INFO L168 Benchmark]: Toolchain (without parser) took 1789.47 ms. Allocated memory is still 154.1 MB. Free memory was 129.7 MB in the beginning and 104.7 MB in the end (delta: 25.0 MB). Peak memory consumption was 24.6 MB. Max. memory is 8.0 GB. [2020-10-27 01:40:54,533 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:40:54,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.62 ms. Allocated memory is still 154.1 MB. Free memory was 129.0 MB in the beginning and 119.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:40:54,535 INFO L168 Benchmark]: Boogie Preprocessor took 49.69 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 118.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:40:54,536 INFO L168 Benchmark]: RCFGBuilder took 464.48 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 103.4 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:40:54,537 INFO L168 Benchmark]: TraceAbstraction took 947.51 ms. Allocated memory is still 154.1 MB. Free memory was 137.5 MB in the beginning and 104.7 MB in the end (delta: 32.8 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:40:54,541 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 154.1 MB. Free memory is still 126.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 281.62 ms. Allocated memory is still 154.1 MB. Free memory was 129.0 MB in the beginning and 119.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.69 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 118.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 464.48 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 103.4 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 947.51 ms. Allocated memory is still 154.1 MB. Free memory was 137.5 MB in the beginning and 104.7 MB in the end (delta: 32.8 MB). Peak memory consumption was 31.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int x,y,z,w; [L26] EXPR w = 0 [L26] EXPR z = w = 0 [L26] EXPR y = z = w = 0 [L26] x = y = z = w = 0 [L27] COND FALSE !(__VERIFIER_nondet_int() && y < 10000) [L42] CALL __VERIFIER_assert(x >= 4 && y <= 2) [L18] COND TRUE !(cond) [L19] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "assert.h", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 21 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 432 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...