/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=BIGGEST --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 20:29:04,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:29:04,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:29:05,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:29:05,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:29:05,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:29:05,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:29:05,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:29:05,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:29:05,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:29:05,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:29:05,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:29:05,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:29:05,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:29:05,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:29:05,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:29:05,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:29:05,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:29:05,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:29:05,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:29:05,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:29:05,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:29:05,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:29:05,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:29:05,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:29:05,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:29:05,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:29:05,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:29:05,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:29:05,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:29:05,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:29:05,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:29:05,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:29:05,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:29:05,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:29:05,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:29:05,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:29:05,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:29:05,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:29:05,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:29:05,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:29:05,079 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 20:29:05,106 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:29:05,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:29:05,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:29:05,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:29:05,108 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:29:05,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:29:05,109 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:29:05,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:29:05,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:29:05,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:29:05,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:29:05,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:29:05,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:29:05,110 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:29:05,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:29:05,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:29:05,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:29:05,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:29:05,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:29:05,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:29:05,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:29:05,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:29:05,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:29:05,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:29:05,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:29:05,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:29:05,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:29:05,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:29:05,113 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:29:05,114 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:29:05,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:29:05,653 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:29:05,658 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:29:05,660 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:29:05,662 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:29:05,663 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2020-09-24 20:29:05,762 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7f3916d7/1e12646896b5428cbf090f4896cf1caf/FLAGe5c4b3a50 [2020-09-24 20:29:06,299 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:29:06,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test08.c [2020-09-24 20:29:06,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7f3916d7/1e12646896b5428cbf090f4896cf1caf/FLAGe5c4b3a50 [2020-09-24 20:29:06,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d7f3916d7/1e12646896b5428cbf090f4896cf1caf [2020-09-24 20:29:06,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:29:06,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:29:06,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:29:06,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:29:06,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:29:06,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:29:06" (1/1) ... [2020-09-24 20:29:06,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dbae1d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:06, skipping insertion in model container [2020-09-24 20:29:06,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:29:06" (1/1) ... [2020-09-24 20:29:06,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:29:06,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:29:07,005 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:29:07,018 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:29:07,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:29:07,055 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:29:07,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07 WrapperNode [2020-09-24 20:29:07,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:29:07,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:29:07,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:29:07,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:29:07,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07" (1/1) ... [2020-09-24 20:29:07,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07" (1/1) ... [2020-09-24 20:29:07,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07" (1/1) ... [2020-09-24 20:29:07,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07" (1/1) ... [2020-09-24 20:29:07,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07" (1/1) ... [2020-09-24 20:29:07,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07" (1/1) ... [2020-09-24 20:29:07,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07" (1/1) ... [2020-09-24 20:29:07,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:29:07,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:29:07,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:29:07,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:29:07,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07" (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 20:29:07,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:29:07,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:29:07,250 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-24 20:29:07,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:29:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:29:07,251 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-24 20:29:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:29:07,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:29:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:29:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:29:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:29:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-09-24 20:29:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:29:07,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:29:07,600 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:29:07,600 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:29:07,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:29:07 BoogieIcfgContainer [2020-09-24 20:29:07,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:29:07,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:29:07,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:29:07,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:29:07,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:29:06" (1/3) ... [2020-09-24 20:29:07,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4c99f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:29:07, skipping insertion in model container [2020-09-24 20:29:07,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:29:07" (2/3) ... [2020-09-24 20:29:07,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e4c99f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:29:07, skipping insertion in model container [2020-09-24 20:29:07,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:29:07" (3/3) ... [2020-09-24 20:29:07,615 INFO L109 eAbstractionObserver]: Analyzing ICFG test08.c [2020-09-24 20:29:07,627 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:29:07,638 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:29:07,661 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:29:07,689 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:29:07,689 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:29:07,689 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:29:07,689 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:29:07,689 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:29:07,690 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:29:07,690 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:29:07,690 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:29:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-09-24 20:29:07,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 20:29:07,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:29:07,721 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 20:29:07,721 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:29:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:29:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash 56438835, now seen corresponding path program 1 times [2020-09-24 20:29:07,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:29:07,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770000491] [2020-09-24 20:29:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:29:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:29:07,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:08,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:08,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:10,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:29:10,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 20:29:10,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 20:29:10,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2377 [2020-09-24 20:29:10,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:29:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 20:29:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-09-24 20:29:10,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-24 20:29:10,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 20:29:10,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:29:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:29:10,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:10,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:29:10,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:29:10,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:29:10,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-09-24 20:29:10,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:29:10,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 20:29:10,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:29:10,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:29:10,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:29:10,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-09-24 20:29:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:29:10,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:29:10,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:29:10,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 20:29:10,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:29:10,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-24 20:29:10,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:29:10,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 20:29:10,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 20:29:10,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 20:29:10,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:29:11,170 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 20:29:11,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770000491] [2020-09-24 20:29:11,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:29:11,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-24 20:29:11,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777054457] [2020-09-24 20:29:11,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 20:29:11,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:29:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 20:29:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-24 20:29:11,205 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 15 states. [2020-09-24 20:29:11,860 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-09-24 20:29:12,007 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-09-24 20:29:12,200 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-09-24 20:29:12,404 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-09-24 20:29:12,576 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-09-24 20:29:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:29:12,786 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-09-24 20:29:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 20:29:12,789 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-24 20:29:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:29:12,803 INFO L225 Difference]: With dead ends: 67 [2020-09-24 20:29:12,804 INFO L226 Difference]: Without dead ends: 43 [2020-09-24 20:29:12,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2020-09-24 20:29:12,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-24 20:29:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-24 20:29:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 20:29:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2020-09-24 20:29:12,862 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2020-09-24 20:29:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:29:12,862 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2020-09-24 20:29:12,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 20:29:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2020-09-24 20:29:12,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 20:29:12,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:29:12,865 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 20:29:12,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:29:12,865 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:29:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:29:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1088655632, now seen corresponding path program 1 times [2020-09-24 20:29:12,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:29:12,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140731579] [2020-09-24 20:29:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:29:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:29:12,891 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:29:12,891 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:29:12,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:29:12,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:29:12 BoogieIcfgContainer [2020-09-24 20:29:12,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:29:12,927 INFO L168 Benchmark]: Toolchain (without parser) took 6258.26 ms. Allocated memory was 138.9 MB in the beginning and 250.1 MB in the end (delta: 111.1 MB). Free memory was 100.6 MB in the beginning and 121.2 MB in the end (delta: -20.5 MB). Peak memory consumption was 90.6 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:12,928 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 118.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-24 20:29:12,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 374.24 ms. Allocated memory is still 138.9 MB. Free memory was 99.8 MB in the beginning and 90.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:12,930 INFO L168 Benchmark]: Boogie Preprocessor took 117.93 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 90.0 MB in the beginning and 179.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:12,931 INFO L168 Benchmark]: RCFGBuilder took 430.77 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 161.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:12,932 INFO L168 Benchmark]: TraceAbstraction took 5317.58 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 161.4 MB in the beginning and 121.2 MB in the end (delta: 40.2 MB). Peak memory consumption was 89.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:29:12,936 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 138.9 MB. Free memory was 119.2 MB in the beginning and 118.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 374.24 ms. Allocated memory is still 138.9 MB. Free memory was 99.8 MB in the beginning and 90.0 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.93 ms. Allocated memory was 138.9 MB in the beginning and 200.8 MB in the end (delta: 61.9 MB). Free memory was 90.0 MB in the beginning and 179.2 MB in the end (delta: -89.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.77 ms. Allocated memory is still 200.8 MB. Free memory was 179.2 MB in the beginning and 161.4 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5317.58 ms. Allocated memory was 200.8 MB in the beginning and 250.1 MB in the end (delta: 49.3 MB). Free memory was 161.4 MB in the beginning and 121.2 MB in the end (delta: 40.2 MB). Peak memory consumption was 89.5 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: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 122 SDslu, 142 SDs, 0 SdLazy, 226 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.7s 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, 3.2s 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...