/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 23:51:14,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:51:14,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:51:14,491 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:51:14,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:51:14,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:51:14,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:51:14,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:51:14,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:51:14,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:51:14,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:51:14,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:51:14,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:51:14,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:51:14,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:51:14,525 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:51:14,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:51:14,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:51:14,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:51:14,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:51:14,542 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:51:14,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:51:14,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:51:14,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:51:14,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:51:14,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:51:14,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:51:14,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:51:14,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:51:14,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:51:14,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:51:14,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:51:14,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:51:14,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:51:14,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:51:14,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:51:14,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:51:14,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:51:14,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:51:14,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:51:14,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:51:14,572 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 [2020-09-24 23:51:14,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:51:14,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:51:14,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:51:14,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:51:14,628 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:51:14,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:51:14,629 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:51:14,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:51:14,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:51:14,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:51:14,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:51:14,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:51:14,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:51:14,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:51:14,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:51:14,632 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:51:14,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:51:14,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:51:14,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:51:14,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:51:14,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:51:14,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:51:14,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:51:14,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:51:14,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:51:14,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:51:14,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:51:14,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:51:14,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:51:14,635 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-24 23:51:15,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:51:15,093 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:51:15,098 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:51:15,100 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:51:15,101 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:51:15,102 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-09-24 23:51:15,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e9225465/9010a7a39194423fb7175257817959b6/FLAG8806e9059 [2020-09-24 23:51:15,726 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:51:15,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test08.c [2020-09-24 23:51:15,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e9225465/9010a7a39194423fb7175257817959b6/FLAG8806e9059 [2020-09-24 23:51:16,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2e9225465/9010a7a39194423fb7175257817959b6 [2020-09-24 23:51:16,064 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:51:16,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:51:16,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:51:16,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:51:16,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:51:16,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:16" (1/1) ... [2020-09-24 23:51:16,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e62aa9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16, skipping insertion in model container [2020-09-24 23:51:16,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:51:16" (1/1) ... [2020-09-24 23:51:16,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:51:16,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:51:16,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:51:16,368 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:51:16,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:51:16,404 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:51:16,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16 WrapperNode [2020-09-24 23:51:16,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:51:16,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:51:16,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:51:16,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:51:16,502 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16" (1/1) ... [2020-09-24 23:51:16,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16" (1/1) ... [2020-09-24 23:51:16,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16" (1/1) ... [2020-09-24 23:51:16,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16" (1/1) ... [2020-09-24 23:51:16,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16" (1/1) ... [2020-09-24 23:51:16,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16" (1/1) ... [2020-09-24 23:51:16,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16" (1/1) ... [2020-09-24 23:51:16,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:51:16,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:51:16,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:51:16,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:51:16,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16" (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 [2020-09-24 23:51:16,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:51:16,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:51:16,605 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-24 23:51:16,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:51:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:51:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-24 23:51:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 23:51:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:51:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 23:51:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:51:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 23:51:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 23:51:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:51:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 23:51:16,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:51:16,930 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 23:51:16,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:16 BoogieIcfgContainer [2020-09-24 23:51:16,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:51:16,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:51:16,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:51:16,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:51:16,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:51:16" (1/3) ... [2020-09-24 23:51:16,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c6ba96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:16, skipping insertion in model container [2020-09-24 23:51:16,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:51:16" (2/3) ... [2020-09-24 23:51:16,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c6ba96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:51:16, skipping insertion in model container [2020-09-24 23:51:16,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:51:16" (3/3) ... [2020-09-24 23:51:16,946 INFO L109 eAbstractionObserver]: Analyzing ICFG test08.c [2020-09-24 23:51:16,958 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:51:16,969 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:51:16,991 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:51:17,020 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:51:17,021 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:51:17,021 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:51:17,021 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:51:17,021 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:51:17,021 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:51:17,021 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:51:17,021 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:51:17,043 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-24 23:51:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 23:51:17,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:17,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:17,053 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:17,059 INFO L82 PathProgramCache]: Analyzing trace with hash 56438835, now seen corresponding path program 1 times [2020-09-24 23:51:17,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:17,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509533242] [2020-09-24 23:51:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:17,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:17,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:18,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:19,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:19,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 23:51:19,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 23:51:19,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2298 [2020-09-24 23:51:19,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:19,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 23:51:19,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-24 23:51:19,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 23:51:19,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-09-24 23:51:19,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:51:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:19,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:19,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 23:51:19,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:19,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 23:51:19,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:19,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 23:51:19,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:51:19,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 23:51:19,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:19,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 23:51:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:51:20,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:51:20,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:51:20,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 23:51:20,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:51:20,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-24 23:51:20,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:51:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 23:51:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 23:51:20,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 23:51:20,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:51:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 23:51:20,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509533242] [2020-09-24 23:51:20,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:51:20,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-24 23:51:20,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242192188] [2020-09-24 23:51:20,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 23:51:20,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:51:20,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 23:51:20,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-24 23:51:20,371 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 15 states. [2020-09-24 23:51:20,999 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-09-24 23:51:21,185 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-09-24 23:51:21,358 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-09-24 23:51:21,550 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-09-24 23:51:21,743 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-09-24 23:51:21,946 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-09-24 23:51:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:51:22,142 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-09-24 23:51:22,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 23:51:22,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-24 23:51:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:51:22,157 INFO L225 Difference]: With dead ends: 67 [2020-09-24 23:51:22,157 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 23:51:22,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=241, Invalid=629, Unknown=0, NotChecked=0, Total=870 [2020-09-24 23:51:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 23:51:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-24 23:51:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 23:51:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2020-09-24 23:51:22,212 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2020-09-24 23:51:22,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:51:22,213 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2020-09-24 23:51:22,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 23:51:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2020-09-24 23:51:22,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 23:51:22,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:51:22,215 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:51:22,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:51:22,216 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:51:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:51:22,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1088655632, now seen corresponding path program 1 times [2020-09-24 23:51:22,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:51:22,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862316714] [2020-09-24 23:51:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:51:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 23:51:22,247 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 23:51:22,248 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 23:51:22,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:51:22,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 11:51:22 BoogieIcfgContainer [2020-09-24 23:51:22,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 23:51:22,293 INFO L168 Benchmark]: Toolchain (without parser) took 6225.50 ms. Allocated memory was 147.8 MB in the beginning and 272.6 MB in the end (delta: 124.8 MB). Free memory was 104.2 MB in the beginning and 212.3 MB in the end (delta: -108.2 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:22,295 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-24 23:51:22,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.46 ms. Allocated memory is still 147.8 MB. Free memory was 103.6 MB in the beginning and 93.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:22,298 INFO L168 Benchmark]: Boogie Preprocessor took 122.36 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.8 MB in the beginning and 182.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:22,300 INFO L168 Benchmark]: RCFGBuilder took 408.03 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 165.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:22,302 INFO L168 Benchmark]: TraceAbstraction took 5351.99 ms. Allocated memory was 204.5 MB in the beginning and 272.6 MB in the end (delta: 68.2 MB). Free memory was 164.8 MB in the beginning and 212.3 MB in the end (delta: -47.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-09-24 23:51:22,318 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.46 ms. Allocated memory is still 147.8 MB. Free memory was 103.6 MB in the beginning and 93.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.36 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 93.8 MB in the beginning and 182.5 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 408.03 ms. Allocated memory is still 204.5 MB. Free memory was 182.5 MB in the beginning and 165.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5351.99 ms. Allocated memory was 204.5 MB in the beginning and 272.6 MB in the end (delta: 68.2 MB). Free memory was 164.8 MB in the beginning and 212.3 MB in the end (delta: -47.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 36]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L4] int a, b; [L5] int *p1, *p2; [L19] p1 = &a [L20] p2 = &b [L22] b = 1 [L23] a = 5 [L25] EXPR \read(a) [L25] a-- [L27] CALL, EXPR f() [L8] EXPR \read(*p1) [L8] EXPR \read(*p2) [L8] EXPR \read(a) [L8] int v = *p1 + *p2 - a; [L9] COND TRUE v == 1 [L10] p1 = p2 [L11] return v; [L27] RET, EXPR f() [L27] a = f() [L29] EXPR \read(a) [L29] COND TRUE a && p1 == p2 [L36] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 124 SDslu, 142 SDs, 0 SdLazy, 224 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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, 0.1s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 18880 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...