/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/terminator_03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:25:53,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:25:53,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:25:53,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:25:53,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:25:53,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:25:53,941 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:25:53,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:25:53,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:25:53,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:25:53,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:25:53,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:25:53,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:25:53,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:25:53,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:25:53,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:25:53,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:25:53,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:25:53,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:25:53,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:25:53,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:25:53,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:25:53,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:25:53,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:25:53,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:25:53,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:25:53,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:25:53,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:25:53,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:25:53,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:25:53,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:25:53,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:25:53,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:25:53,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:25:53,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:25:53,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:25:53,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:25:53,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:25:53,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:25:54,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:25:54,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:25:54,003 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 [2020-10-12 16:25:54,041 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:25:54,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:25:54,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:25:54,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:25:54,044 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:25:54,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:25:54,044 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:25:54,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:25:54,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:25:54,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:25:54,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:25:54,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:25:54,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:25:54,046 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:25:54,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:25:54,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:25:54,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:25:54,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:25:54,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:25:54,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:25:54,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:25:54,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:25:54,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:25:54,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:25:54,049 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:25:54,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:25:54,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:25:54,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:25:54,049 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:25:54,050 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:25:54,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:25:54,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:25:54,389 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:25:54,391 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:25:54,392 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:25:54,392 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/terminator_03-1.c [2020-10-12 16:25:54,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc9f97918/71b86a7c96c64542a6bef7a7b07ed886/FLAGe2ef37115 [2020-10-12 16:25:54,947 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:25:54,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/terminator_03-1.c [2020-10-12 16:25:54,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc9f97918/71b86a7c96c64542a6bef7a7b07ed886/FLAGe2ef37115 [2020-10-12 16:25:55,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc9f97918/71b86a7c96c64542a6bef7a7b07ed886 [2020-10-12 16:25:55,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:25:55,325 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:25:55,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:25:55,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:25:55,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:25:55,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:25:55" (1/1) ... [2020-10-12 16:25:55,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f21738f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55, skipping insertion in model container [2020-10-12 16:25:55,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:25:55" (1/1) ... [2020-10-12 16:25:55,350 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:25:55,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:25:55,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:25:55,591 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:25:55,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:25:55,619 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:25:55,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55 WrapperNode [2020-10-12 16:25:55,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:25:55,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:25:55,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:25:55,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:25:55,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55" (1/1) ... [2020-10-12 16:25:55,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55" (1/1) ... [2020-10-12 16:25:55,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55" (1/1) ... [2020-10-12 16:25:55,725 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55" (1/1) ... [2020-10-12 16:25:55,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55" (1/1) ... [2020-10-12 16:25:55,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55" (1/1) ... [2020-10-12 16:25:55,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55" (1/1) ... [2020-10-12 16:25:55,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:25:55,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:25:55,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:25:55,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:25:55,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55" (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 [2020-10-12 16:25:55,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:25:55,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:25:55,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:25:55,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:25:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:25:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:25:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:25:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:25:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:25:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:25:55,995 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:25:55,995 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:25:55,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:25:55 BoogieIcfgContainer [2020-10-12 16:25:55,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:25:56,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:25:56,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:25:56,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:25:56,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:25:55" (1/3) ... [2020-10-12 16:25:56,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e3da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:25:56, skipping insertion in model container [2020-10-12 16:25:56,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:25:55" (2/3) ... [2020-10-12 16:25:56,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e3da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:25:56, skipping insertion in model container [2020-10-12 16:25:56,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:25:55" (3/3) ... [2020-10-12 16:25:56,008 INFO L109 eAbstractionObserver]: Analyzing ICFG terminator_03-1.c [2020-10-12 16:25:56,018 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:25:56,026 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:25:56,040 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:25:56,064 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:25:56,064 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:25:56,064 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:25:56,064 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:25:56,065 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:25:56,065 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:25:56,065 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:25:56,065 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:25:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-12 16:25:56,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:25:56,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:56,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:56,089 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:56,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:56,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-10-12 16:25:56,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:56,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879132578] [2020-10-12 16:25:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:56,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:56,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:56,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:25:56,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:56,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-12 16:25:56,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:56,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:25:56,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:25:56,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:25:56,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:25:56,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:25:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:25:56,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:25:56,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:25:56,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:25:56,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:25:56,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:25:56,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:25:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:25:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:25:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:25:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:25:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:25:56,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879132578] [2020-10-12 16:25:56,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:25:56,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:25:56,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446349211] [2020-10-12 16:25:56,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:25:56,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:25:56,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:25:56,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:25:56,474 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-10-12 16:25:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:25:56,578 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-12 16:25:56,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:25:56,581 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 16:25:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:25:56,590 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:25:56,590 INFO L226 Difference]: Without dead ends: 12 [2020-10-12 16:25:56,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:25:56,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-12 16:25:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-12 16:25:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-12 16:25:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-10-12 16:25:56,653 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-10-12 16:25:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:25:56,654 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-10-12 16:25:56,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:25:56,655 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-10-12 16:25:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-12 16:25:56,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:25:56,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:25:56,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:25:56,656 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:25:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:25:56,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1117320769, now seen corresponding path program 1 times [2020-10-12 16:25:56,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:25:56,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668168156] [2020-10-12 16:25:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:25:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 16:25:56,693 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 16:25:56,695 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 16:25:56,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:25:56,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 04:25:56 BoogieIcfgContainer [2020-10-12 16:25:56,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 16:25:56,729 INFO L168 Benchmark]: Toolchain (without parser) took 1401.80 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 103.2 MB in the beginning and 134.9 MB in the end (delta: -31.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:56,733 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-12 16:25:56,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.46 ms. Allocated memory is still 146.8 MB. Free memory was 103.0 MB in the beginning and 93.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:56,735 INFO L168 Benchmark]: Boogie Preprocessor took 119.70 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 93.6 MB in the beginning and 181.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:56,737 INFO L168 Benchmark]: RCFGBuilder took 258.39 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:56,738 INFO L168 Benchmark]: TraceAbstraction took 723.87 ms. Allocated memory is still 202.4 MB. Free memory was 168.5 MB in the beginning and 134.9 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 MB. Max. memory is 7.1 GB. [2020-10-12 16:25:56,748 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 291.46 ms. Allocated memory is still 146.8 MB. Free memory was 103.0 MB in the beginning and 93.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.70 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 93.6 MB in the beginning and 181.4 MB in the end (delta: -87.8 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.39 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 169.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 723.87 ms. Allocated memory is still 202.4 MB. Free memory was 168.5 MB in the beginning and 134.9 MB in the end (delta: 33.6 MB). Peak memory consumption was 33.6 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: [L13] int x=__VERIFIER_nondet_int(); [L14] int y=__VERIFIER_nondet_int(); [L16] COND TRUE y>0 [L18] COND FALSE !(x<100) [L23] CALL __VERIFIER_assert(y<=0 || (y<0 && x>=100)) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 8 SDslu, 48 SDs, 0 SdLazy, 14 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 153 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...