/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=SMALLEST --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/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 18:17:43,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 18:17:43,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 18:17:43,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 18:17:43,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 18:17:43,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 18:17:43,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 18:17:43,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 18:17:43,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 18:17:43,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 18:17:43,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 18:17:43,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 18:17:43,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 18:17:43,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 18:17:43,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 18:17:43,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 18:17:43,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 18:17:43,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 18:17:43,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 18:17:43,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 18:17:43,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 18:17:43,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 18:17:43,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 18:17:43,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 18:17:43,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 18:17:43,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 18:17:43,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 18:17:43,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 18:17:43,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 18:17:43,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 18:17:43,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 18:17:43,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 18:17:43,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 18:17:43,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 18:17:43,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 18:17:43,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 18:17:43,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 18:17:43,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 18:17:43,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 18:17:43,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 18:17:43,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 18:17:43,627 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 18:17:43,683 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 18:17:43,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 18:17:43,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 18:17:43,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 18:17:43,688 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 18:17:43,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 18:17:43,688 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 18:17:43,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 18:17:43,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 18:17:43,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 18:17:43,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 18:17:43,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 18:17:43,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 18:17:43,691 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 18:17:43,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 18:17:43,692 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 18:17:43,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 18:17:43,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 18:17:43,693 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 18:17:43,693 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 18:17:43,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 18:17:43,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 18:17:43,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 18:17:43,694 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 18:17:43,694 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 18:17:43,694 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 18:17:43,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 18:17:43,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 18:17:43,695 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 18:17:43,695 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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;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=SMALLEST;log-additional-information=true; [2020-09-24 18:17:44,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 18:17:44,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 18:17:44,237 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 18:17:44,239 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 18:17:44,239 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 18:17:44,240 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-09-24 18:17:44,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/772c7d0f5/ae77aa74123543d48d2b38c0d6d7b297/FLAG76ae1c707 [2020-09-24 18:17:44,924 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 18:17:44,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test06.c [2020-09-24 18:17:44,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/772c7d0f5/ae77aa74123543d48d2b38c0d6d7b297/FLAG76ae1c707 [2020-09-24 18:17:45,253 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/772c7d0f5/ae77aa74123543d48d2b38c0d6d7b297 [2020-09-24 18:17:45,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 18:17:45,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 18:17:45,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 18:17:45,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 18:17:45,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 18:17:45,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:17:45" (1/1) ... [2020-09-24 18:17:45,286 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 06:17:45, skipping insertion in model container [2020-09-24 18:17:45,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 06:17:45" (1/1) ... [2020-09-24 18:17:45,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 18:17:45,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 18:17:45,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:17:45,635 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 18:17:45,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 18:17:45,671 INFO L208 MainTranslator]: Completed translation [2020-09-24 18:17:45,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45 WrapperNode [2020-09-24 18:17:45,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 18:17:45,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 18:17:45,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 18:17:45,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 18:17:45,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45" (1/1) ... [2020-09-24 18:17:45,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45" (1/1) ... [2020-09-24 18:17:45,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45" (1/1) ... [2020-09-24 18:17:45,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45" (1/1) ... [2020-09-24 18:17:45,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45" (1/1) ... [2020-09-24 18:17:45,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45" (1/1) ... [2020-09-24 18:17:45,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45" (1/1) ... [2020-09-24 18:17:45,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 18:17:45,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 18:17:45,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 18:17:45,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 18:17:45,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45" (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 18:17:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 18:17:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 18:17:45,880 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-09-24 18:17:45,881 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-24 18:17:45,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 18:17:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 18:17:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-09-24 18:17:45,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 18:17:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 18:17:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 18:17:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-24 18:17:45,882 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 18:17:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 18:17:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 18:17:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 18:17:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 18:17:45,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 18:17:46,292 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 18:17:46,293 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 18:17:46,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:17:46 BoogieIcfgContainer [2020-09-24 18:17:46,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 18:17:46,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 18:17:46,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 18:17:46,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 18:17:46,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 06:17:45" (1/3) ... [2020-09-24 18:17:46,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c762dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:17:46, skipping insertion in model container [2020-09-24 18:17:46,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 06:17:45" (2/3) ... [2020-09-24 18:17:46,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c762dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 06:17:46, skipping insertion in model container [2020-09-24 18:17:46,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 06:17:46" (3/3) ... [2020-09-24 18:17:46,310 INFO L109 eAbstractionObserver]: Analyzing ICFG test06.c [2020-09-24 18:17:46,322 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 18:17:46,339 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 18:17:46,363 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 18:17:46,389 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 18:17:46,389 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 18:17:46,389 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 18:17:46,389 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 18:17:46,389 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 18:17:46,390 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 18:17:46,390 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 18:17:46,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 18:17:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-09-24 18:17:46,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 18:17:46,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:46,421 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] [2020-09-24 18:17:46,422 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:46,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1600319067, now seen corresponding path program 1 times [2020-09-24 18:17:46,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:46,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886040994] [2020-09-24 18:17:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:46,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:47,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:47,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 18:17:47,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:47,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-09-24 18:17:47,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 18:17:47,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 18:17:47,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 18:17:47,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 18:17:47,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 18:17:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:47,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:47,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:47,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 18:17:47,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:47,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 18:17:47,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:47,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 18:17:47,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 18:17:47,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 18:17:47,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:47,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 18:17:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 18:17:47,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 18:17:47,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 18:17:47,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 18:17:47,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 18:17:47,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-24 18:17:47,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 18:17:47,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 18:17:47,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-09-24 18:17:47,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-24 18:17:47,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 18:17:47,744 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 18:17:47,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886040994] [2020-09-24 18:17:47,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 18:17:47,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-24 18:17:47,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711713266] [2020-09-24 18:17:47,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 18:17:47,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 18:17:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 18:17:47,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-24 18:17:47,779 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 11 states. [2020-09-24 18:17:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 18:17:48,350 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2020-09-24 18:17:48,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 18:17:48,352 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-24 18:17:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 18:17:48,366 INFO L225 Difference]: With dead ends: 105 [2020-09-24 18:17:48,367 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 18:17:48,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-09-24 18:17:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 18:17:48,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-09-24 18:17:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 18:17:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 51 transitions. [2020-09-24 18:17:48,430 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 51 transitions. Word has length 39 [2020-09-24 18:17:48,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 18:17:48,431 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 51 transitions. [2020-09-24 18:17:48,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 18:17:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 51 transitions. [2020-09-24 18:17:48,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 18:17:48,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 18:17:48,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 18:17:48,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 18:17:48,434 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 18:17:48,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 18:17:48,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2059010026, now seen corresponding path program 1 times [2020-09-24 18:17:48,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 18:17:48,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112132656] [2020-09-24 18:17:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 18:17:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 18:17:48,497 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 18:17:48,498 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 18:17:48,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 18:17:48,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 06:17:48 BoogieIcfgContainer [2020-09-24 18:17:48,531 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 18:17:48,535 INFO L168 Benchmark]: Toolchain (without parser) took 3263.61 ms. Allocated memory was 140.0 MB in the beginning and 237.0 MB in the end (delta: 97.0 MB). Free memory was 103.2 MB in the beginning and 117.1 MB in the end (delta: -13.8 MB). Peak memory consumption was 83.2 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:48,536 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 18:17:48,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.85 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:48,539 INFO L168 Benchmark]: Boogie Preprocessor took 130.18 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 180.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:48,539 INFO L168 Benchmark]: RCFGBuilder took 496.91 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 158.0 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:48,541 INFO L168 Benchmark]: TraceAbstraction took 2229.44 ms. Allocated memory was 202.9 MB in the beginning and 237.0 MB in the end (delta: 34.1 MB). Free memory was 157.3 MB in the beginning and 117.1 MB in the end (delta: 40.3 MB). Peak memory consumption was 74.4 MB. Max. memory is 7.1 GB. [2020-09-24 18:17:48,545 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 396.85 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 92.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.18 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 92.7 MB in the beginning and 180.9 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 496.91 ms. Allocated memory is still 202.9 MB. Free memory was 180.9 MB in the beginning and 158.0 MB in the end (delta: 22.9 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2229.44 ms. Allocated memory was 202.9 MB in the beginning and 237.0 MB in the end (delta: 34.1 MB). Free memory was 157.3 MB in the beginning and 117.1 MB in the end (delta: 40.3 MB). Peak memory consumption was 74.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 40]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int a, b; [L22] int *p1, *p2; [L24] p1 = &a [L25] p2 = &b [L27] b = 1 [L28] a = 5 [L30] EXPR \read(a) [L30] a-- [L32] EXPR \read(a) [L32] CALL, EXPR f(a, &p1, &p2) [L12] COND TRUE a == 4 [L13] CALL g(p1, p2) [L5] EXPR \read(**p2) [L5] int *pq = *p2; [L7] EXPR \read(**p2) [L7] *p1 = *p2 [L8] *pq = 0 [L13] RET g(p1, p2) [L14] return 1; [L32] RET, EXPR f(a, &p1, &p2) [L32] a = f(a, &p1, &p2) [L34] EXPR \read(*p1) [L34] COND TRUE *p1 == 0 [L40] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 77 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 52 SDslu, 262 SDs, 0 SdLazy, 287 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred 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, 1.0s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 5244 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...