/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/array-fpi/modnf.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:38:13,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:38:13,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:38:13,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:38:13,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:38:13,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:38:13,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:38:13,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:38:13,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:38:13,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:38:13,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:38:13,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:38:13,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:38:13,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:38:13,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:38:13,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:38:13,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:38:13,966 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:38:13,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:38:13,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:38:13,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:38:13,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:38:13,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:38:13,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:38:14,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:38:14,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:38:14,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:38:14,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:38:14,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:38:14,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:38:14,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:38:14,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:38:14,011 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:38:14,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:38:14,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:38:14,013 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:38:14,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:38:14,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:38:14,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:38:14,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:38:14,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:38:14,022 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 [2020-10-26 19:38:14,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:38:14,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:38:14,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:38:14,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:38:14,077 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:38:14,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:38:14,078 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:38:14,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:38:14,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:38:14,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:38:14,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:38:14,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:38:14,080 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:38:14,080 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:38:14,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:38:14,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:38:14,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:38:14,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:38:14,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:38:14,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:38:14,082 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:38:14,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:38:14,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:38:14,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:38:14,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:38:14,083 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:38:14,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:38:14,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:38:14,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:38:14,083 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:38:14,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:38:14,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:38:14,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:38:14,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:38:14,527 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:38:14,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/modnf.c [2020-10-26 19:38:14,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b7ef26f7/e408ebf78f504249840a2af08c5037fa/FLAG5a542130d [2020-10-26 19:38:15,225 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:38:15,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/modnf.c [2020-10-26 19:38:15,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b7ef26f7/e408ebf78f504249840a2af08c5037fa/FLAG5a542130d [2020-10-26 19:38:15,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2b7ef26f7/e408ebf78f504249840a2af08c5037fa [2020-10-26 19:38:15,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:38:15,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:38:15,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:15,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:38:15,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:38:15,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:15" (1/1) ... [2020-10-26 19:38:15,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7551718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15, skipping insertion in model container [2020-10-26 19:38:15,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:38:15" (1/1) ... [2020-10-26 19:38:15,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:38:15,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:38:15,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:15,792 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:38:15,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:38:15,832 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:38:15,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15 WrapperNode [2020-10-26 19:38:15,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:38:15,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:38:15,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:38:15,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:38:15,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15" (1/1) ... [2020-10-26 19:38:15,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15" (1/1) ... [2020-10-26 19:38:15,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15" (1/1) ... [2020-10-26 19:38:15,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15" (1/1) ... [2020-10-26 19:38:15,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15" (1/1) ... [2020-10-26 19:38:15,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15" (1/1) ... [2020-10-26 19:38:15,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15" (1/1) ... [2020-10-26 19:38:15,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:38:15,872 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:38:15,872 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:38:15,872 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:38:15,873 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15" (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 [2020-10-26 19:38:15,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:38:15,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:38:15,950 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:38:15,951 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:38:15,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:38:15,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:38:15,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:38:15,952 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:38:15,952 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:38:15,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:38:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:38:15,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:38:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:38:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:38:15,955 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:38:15,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:38:15,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:38:15,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:38:15,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:38:15,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:38:15,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:38:15,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:38:16,393 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:38:16,393 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:38:16,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:16 BoogieIcfgContainer [2020-10-26 19:38:16,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:38:16,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:38:16,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:38:16,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:38:16,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:38:15" (1/3) ... [2020-10-26 19:38:16,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701093cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:16, skipping insertion in model container [2020-10-26 19:38:16,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:38:15" (2/3) ... [2020-10-26 19:38:16,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@701093cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:38:16, skipping insertion in model container [2020-10-26 19:38:16,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:38:16" (3/3) ... [2020-10-26 19:38:16,411 INFO L111 eAbstractionObserver]: Analyzing ICFG modnf.c [2020-10-26 19:38:16,452 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:38:16,457 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:38:16,475 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:38:16,515 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:38:16,516 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:38:16,516 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:38:16,516 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:38:16,516 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:38:16,516 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:38:16,516 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:38:16,516 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:38:16,539 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:38:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:38:16,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:16,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:16,550 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:16,560 INFO L82 PathProgramCache]: Analyzing trace with hash -391571351, now seen corresponding path program 1 times [2020-10-26 19:38:16,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:16,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652973620] [2020-10-26 19:38:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:16,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:16,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:16,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:17,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:38:17,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:38:17,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 983 [2020-10-26 19:38:17,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:38:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:38:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:38:17,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:38:17,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:38:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:17,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:17,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:38:17,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:38:17,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:38:17,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:17,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:38:17,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:17,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:38:17,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:38:17,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-26 19:38:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:38:17,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:38:17,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:38:17,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:38:17,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:38:17,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:38:17,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:38:17,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:38:17,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:38:17,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:38:17,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:38:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:38:17,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652973620] [2020-10-26 19:38:17,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:38:17,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:38:17,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456168641] [2020-10-26 19:38:17,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:38:17,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:38:17,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:38:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:38:17,958 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-10-26 19:38:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:38:18,174 INFO L93 Difference]: Finished difference Result 70 states and 91 transitions. [2020-10-26 19:38:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:38:18,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-26 19:38:18,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:38:18,190 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:38:18,191 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:38:18,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:38:18,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:38:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-26 19:38:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:38:18,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-26 19:38:18,258 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-10-26 19:38:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:38:18,258 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-26 19:38:18,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:38:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-26 19:38:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:38:18,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:38:18,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:38:18,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:38:18,271 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:38:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:38:18,272 INFO L82 PathProgramCache]: Analyzing trace with hash 385078571, now seen corresponding path program 1 times [2020-10-26 19:38:18,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:38:18,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019977347] [2020-10-26 19:38:18,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:38:18,300 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-26 19:38:18,301 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-26 19:38:18,301 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-26 19:38:18,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:38:18,327 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-26 19:38:18,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.10 07:38:18 BoogieIcfgContainer [2020-10-26 19:38:18,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-26 19:38:18,334 INFO L168 Benchmark]: Toolchain (without parser) took 2758.96 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 127.0 MB in the beginning and 119.9 MB in the end (delta: 7.0 MB). Peak memory consumption was 43.1 MB. Max. memory is 8.0 GB. [2020-10-26 19:38:18,336 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 151.0 MB. Free memory is still 122.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-26 19:38:18,339 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.90 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-26 19:38:18,346 INFO L168 Benchmark]: Boogie Preprocessor took 36.88 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-26 19:38:18,347 INFO L168 Benchmark]: RCFGBuilder took 526.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 98.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-26 19:38:18,348 INFO L168 Benchmark]: TraceAbstraction took 1925.96 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 98.2 MB in the beginning and 119.9 MB in the end (delta: -21.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. [2020-10-26 19:38:18,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 151.0 MB. Free memory is still 122.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.90 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.88 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 526.78 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 98.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1925.96 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 98.2 MB in the beginning and 119.9 MB in the end (delta: -21.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i