/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:31:45,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:31:45,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:31:45,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:31:45,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:31:45,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:31:45,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:31:45,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:31:45,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:31:45,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:31:45,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:31:45,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:31:45,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:31:45,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:31:45,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:31:45,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:31:45,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:31:45,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:31:45,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:31:45,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:31:45,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:31:45,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:31:45,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:31:45,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:31:45,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:31:45,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:31:45,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:31:45,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:31:45,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:31:45,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:31:45,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:31:45,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:31:45,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:31:45,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:31:45,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:31:45,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:31:45,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:31:45,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:31:45,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:31:45,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:31:45,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:31:45,548 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 12:31:45,574 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:31:45,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:31:45,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:31:45,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:31:45,577 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:31:45,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:31:45,577 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:31:45,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:31:45,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:31:45,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:31:45,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:31:45,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:31:45,578 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:31:45,578 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:31:45,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:31:45,579 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:31:45,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:31:45,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:31:45,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:31:45,580 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:31:45,580 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:31:45,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:31:45,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:31:45,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:31:45,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:31:45,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:31:45,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:31:45,581 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:31:45,582 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:31:45,582 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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;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=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:31:46,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:31:46,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:31:46,152 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:31:46,155 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:31:46,155 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:31:46,157 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-09-25 12:31:46,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c77167fbe/37913d27bb244a28aca6d6509f40e571/FLAG5368d30cd [2020-09-25 12:31:46,834 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:31:46,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-09-25 12:31:46,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c77167fbe/37913d27bb244a28aca6d6509f40e571/FLAG5368d30cd [2020-09-25 12:31:47,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c77167fbe/37913d27bb244a28aca6d6509f40e571 [2020-09-25 12:31:47,175 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:31:47,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:31:47,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:47,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:31:47,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:31:47,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:47" (1/1) ... [2020-09-25 12:31:47,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dc17a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47, skipping insertion in model container [2020-09-25 12:31:47,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:31:47" (1/1) ... [2020-09-25 12:31:47,203 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:31:47,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:31:47,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:47,462 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:31:47,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:31:47,499 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:31:47,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47 WrapperNode [2020-09-25 12:31:47,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:31:47,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:31:47,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:31:47,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:31:47,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47" (1/1) ... [2020-09-25 12:31:47,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47" (1/1) ... [2020-09-25 12:31:47,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47" (1/1) ... [2020-09-25 12:31:47,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47" (1/1) ... [2020-09-25 12:31:47,524 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47" (1/1) ... [2020-09-25 12:31:47,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47" (1/1) ... [2020-09-25 12:31:47,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47" (1/1) ... [2020-09-25 12:31:47,618 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:31:47,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:31:47,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:31:47,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:31:47,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47" (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 12:31:47,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:31:47,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:31:47,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 12:31:47,709 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-09-25 12:31:47,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:31:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:31:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 12:31:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-09-25 12:31:47,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:31:47,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:31:47,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:31:47,909 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:31:47,909 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-25 12:31:47,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:47 BoogieIcfgContainer [2020-09-25 12:31:47,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:31:47,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:31:47,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:31:47,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:31:47,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:31:47" (1/3) ... [2020-09-25 12:31:47,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793bf488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:47, skipping insertion in model container [2020-09-25 12:31:47,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:31:47" (2/3) ... [2020-09-25 12:31:47,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793bf488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:31:47, skipping insertion in model container [2020-09-25 12:31:47,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:31:47" (3/3) ... [2020-09-25 12:31:47,949 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-09-25 12:31:47,965 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:31:47,976 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:31:48,000 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:31:48,038 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:31:48,038 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:31:48,038 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:31:48,039 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:31:48,039 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:31:48,039 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:31:48,039 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:31:48,039 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:31:48,062 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-25 12:31:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-25 12:31:48,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:48,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:48,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1063393928, now seen corresponding path program 1 times [2020-09-25 12:31:48,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:48,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982588031] [2020-09-25 12:31:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:48,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:48,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:48,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 12:31:48,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:48,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-25 12:31:48,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:48,303 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:48,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:31:48,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-25 12:31:48,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 12:31:48,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:31:48,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:48,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:48,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:48,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 12:31:48,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:48,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 12:31:48,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:48,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:48,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:31:48,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:48,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 12:31:48,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:48,469 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 12:31:48,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982588031] [2020-09-25 12:31:48,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:31:48,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:31:48,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606956084] [2020-09-25 12:31:48,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 12:31:48,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:48,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 12:31:48,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:31:48,496 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states. [2020-09-25 12:31:48,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:48,640 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2020-09-25 12:31:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 12:31:48,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-25 12:31:48,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:48,658 INFO L225 Difference]: With dead ends: 41 [2020-09-25 12:31:48,659 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 12:31:48,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 12:31:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 12:31:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-09-25 12:31:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-25 12:31:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-09-25 12:31:48,715 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 10 [2020-09-25 12:31:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:48,715 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-09-25 12:31:48,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 12:31:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-09-25 12:31:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 12:31:48,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:48,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:48,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:31:48,718 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:48,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:48,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1652124924, now seen corresponding path program 1 times [2020-09-25 12:31:48,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:48,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63245275] [2020-09-25 12:31:48,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 12:31:48,733 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 12:31:48,733 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 12:31:48,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:31:48,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:31:48 BoogieIcfgContainer [2020-09-25 12:31:48,758 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 12:31:48,762 INFO L168 Benchmark]: Toolchain (without parser) took 1583.75 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 105.9 MB in the beginning and 133.4 MB in the end (delta: -27.5 MB). Peak memory consumption was 29.6 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:48,763 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 124.3 MB in the beginning and 124.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 12:31:48,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.26 ms. Allocated memory is still 146.3 MB. Free memory was 105.2 MB in the beginning and 96.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:48,765 INFO L168 Benchmark]: Boogie Preprocessor took 118.33 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 96.0 MB in the beginning and 183.5 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:48,766 INFO L168 Benchmark]: RCFGBuilder took 296.97 ms. Allocated memory is still 203.4 MB. Free memory was 183.5 MB in the beginning and 171.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:48,767 INFO L168 Benchmark]: TraceAbstraction took 827.41 ms. Allocated memory is still 203.4 MB. Free memory was 171.1 MB in the beginning and 133.4 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2020-09-25 12:31:48,771 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.3 MB. Free memory was 124.3 MB in the beginning and 124.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.26 ms. Allocated memory is still 146.3 MB. Free memory was 105.2 MB in the beginning and 96.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.33 ms. Allocated memory was 146.3 MB in the beginning and 203.4 MB in the end (delta: 57.1 MB). Free memory was 96.0 MB in the beginning and 183.5 MB in the end (delta: -87.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 296.97 ms. Allocated memory is still 203.4 MB. Free memory was 183.5 MB in the beginning and 171.7 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 827.41 ms. Allocated memory is still 203.4 MB. Free memory was 171.1 MB in the beginning and 133.4 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; [L24] COND TRUE 1 [L26] CALL eval() [L14] COND TRUE 1 [L15] x=1 [L26] RET eval() [L27] CALL __VERIFIER_assert(x==0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 11 SDslu, 39 SDs, 0 SdLazy, 21 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 243 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...