/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:26:18,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:26:18,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:26:18,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:26:18,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:26:18,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:26:18,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:26:18,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:26:18,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:26:18,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:26:18,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:26:18,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:26:18,255 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:26:18,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:26:18,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:26:18,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:26:18,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:26:18,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:26:18,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:26:18,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:26:18,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:26:18,258 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:26:18,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:26:18,259 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:26:18,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:26:18,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:26:18,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:26:18,260 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:26:18,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:26:18,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:26:18,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:26:18,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:26:18,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:26:18,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:26:18,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:26:18,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:26:18,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:26:18,262 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:26:18,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:26:18,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:26:18,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:26:18,672 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:26:18,672 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:26:18,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-10-23 18:26:18,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59419931c/c91b5bd75f5746fa84391c14e634f2b5/FLAG42ffe1d6e [2020-10-23 18:26:19,403 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:26:19,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-10-23 18:26:19,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59419931c/c91b5bd75f5746fa84391c14e634f2b5/FLAG42ffe1d6e [2020-10-23 18:26:19,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59419931c/c91b5bd75f5746fa84391c14e634f2b5 [2020-10-23 18:26:19,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:26:19,773 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:26:19,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:19,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:26:19,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:26:19,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:19" (1/1) ... [2020-10-23 18:26:19,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a14f1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:19, skipping insertion in model container [2020-10-23 18:26:19,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:26:19" (1/1) ... [2020-10-23 18:26:19,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:26:19,806 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:26:19,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:20,001 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:26:20,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:26:20,036 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:26:20,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20 WrapperNode [2020-10-23 18:26:20,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:26:20,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:26:20,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:26:20,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:26:20,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20" (1/1) ... [2020-10-23 18:26:20,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20" (1/1) ... [2020-10-23 18:26:20,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20" (1/1) ... [2020-10-23 18:26:20,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20" (1/1) ... [2020-10-23 18:26:20,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20" (1/1) ... [2020-10-23 18:26:20,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20" (1/1) ... [2020-10-23 18:26:20,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20" (1/1) ... [2020-10-23 18:26:20,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:26:20,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:26:20,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:26:20,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:26:20,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:26:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:26:20,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:26:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:26:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-10-23 18:26:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-10-23 18:26:20,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:26:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:26:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:26:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:26:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:26:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-23 18:26:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 18:26:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 18:26:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:26:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-23 18:26:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:26:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:26:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:26:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:26:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:26:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:26:20,661 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:26:20,661 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:26:20,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:20 BoogieIcfgContainer [2020-10-23 18:26:20,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:26:20,665 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:26:20,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:26:20,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:26:20,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:26:19" (1/3) ... [2020-10-23 18:26:20,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63764acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:20, skipping insertion in model container [2020-10-23 18:26:20,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:26:20" (2/3) ... [2020-10-23 18:26:20,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63764acb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:26:20, skipping insertion in model container [2020-10-23 18:26:20,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:26:20" (3/3) ... [2020-10-23 18:26:20,673 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2020-10-23 18:26:20,687 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:26:20,692 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:26:20,708 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:26:20,739 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:26:20,739 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:26:20,739 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:26:20,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:26:20,739 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:26:20,740 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:26:20,740 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:26:20,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:26:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-23 18:26:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:26:20,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:20,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:26:20,764 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:20,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1093971820, now seen corresponding path program 1 times [2020-10-23 18:26:20,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:20,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543056729] [2020-10-23 18:26:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:21,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:26:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:21,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:26:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:26:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:26:21,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543056729] [2020-10-23 18:26:21,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:26:21,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 18:26:21,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698744638] [2020-10-23 18:26:21,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 18:26:21,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:26:21,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 18:26:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 18:26:21,319 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 7 states. [2020-10-23 18:26:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:26:21,788 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-10-23 18:26:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:26:21,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-23 18:26:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:26:21,807 INFO L225 Difference]: With dead ends: 39 [2020-10-23 18:26:21,807 INFO L226 Difference]: Without dead ends: 21 [2020-10-23 18:26:21,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-23 18:26:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-23 18:26:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-23 18:26:21,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-23 18:26:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2020-10-23 18:26:21,868 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 15 [2020-10-23 18:26:21,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:26:21,869 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2020-10-23 18:26:21,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 18:26:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2020-10-23 18:26:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 18:26:21,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:26:21,871 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] [2020-10-23 18:26:21,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:26:21,874 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:26:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:26:21,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1045527591, now seen corresponding path program 1 times [2020-10-23 18:26:21,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:26:21,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688068034] [2020-10-23 18:26:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:26:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:26:21,989 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:26:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:26:22,054 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:26:22,112 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:26:22,113 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:26:22,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:26:22,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:26:22 BoogieIcfgContainer [2020-10-23 18:26:22,199 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:26:22,203 INFO L168 Benchmark]: Toolchain (without parser) took 2432.74 ms. Allocated memory is still 153.1 MB. Free memory was 128.6 MB in the beginning and 134.8 MB in the end (delta: -6.2 MB). Peak memory consumption was 81.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:22,205 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 153.1 MB. Free memory was 125.8 MB in the beginning and 125.7 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:26:22,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.05 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 118.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:22,211 INFO L168 Benchmark]: Boogie Preprocessor took 36.86 ms. Allocated memory is still 153.1 MB. Free memory was 118.4 MB in the beginning and 117.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:22,212 INFO L168 Benchmark]: RCFGBuilder took 587.17 ms. Allocated memory is still 153.1 MB. Free memory was 116.8 MB in the beginning and 131.1 MB in the end (delta: -14.2 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:22,214 INFO L168 Benchmark]: TraceAbstraction took 1534.34 ms. Allocated memory is still 153.1 MB. Free memory was 130.6 MB in the beginning and 134.8 MB in the end (delta: -4.2 MB). Peak memory consumption was 82.8 MB. Max. memory is 8.0 GB. [2020-10-23 18:26:22,224 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 153.1 MB. Free memory was 125.8 MB in the beginning and 125.7 MB in the end (delta: 80.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.05 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 118.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.86 ms. Allocated memory is still 153.1 MB. Free memory was 118.4 MB in the beginning and 117.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 587.17 ms. Allocated memory is still 153.1 MB. Free memory was 116.8 MB in the beginning and 131.1 MB in the end (delta: -14.2 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1534.34 ms. Allocated memory is still 153.1 MB. Free memory was 130.6 MB in the beginning and 134.8 MB in the end (delta: -4.2 MB). Peak memory consumption was 82.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int a, b; [L24] int *p1, *p2; [L26] p1 = &a [L27] p2 = &b [L29] b = 1 [L30] a = 5 [L32] EXPR \read(a) [L32] a-- [L34] EXPR \read(a) VAL [\read(a)=4, a={8:0}, b={3:0}, p1={11:0}, p2={10:0}] [L34] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={11:0}, p2={10:0}] [L14] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={11:0}, p1={11:0}, p2={10:0}, p2={10:0}] [L15] CALL g(p1, p2) VAL [p1={11:0}, p2={10:0}] [L7] EXPR \read(**p2) [L7] int *pq = *p2; [L9] EXPR \read(**p2) [L9] *p1 = *p2 [L10] *pq = 0 VAL [p1={11:0}, p1={11:0}, p2={10:0}, p2={10:0}, pq={3:0}] [L15] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={11:0}, p1={11:0}, p2={10:0}, p2={10:0}] [L16] return 1; VAL [\old(a)=4, \result=1, a=4, p1={11:0}, p1={11:0}, p2={10:0}, p2={10:0}] [L34] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={8:0}, b={3:0}, f(a, &p1, &p2)=1, p1={11:0}, p2={10:0}] [L34] a = f(a, &p1, &p2) [L36] EXPR \read(*p1) VAL [\read(*p1)={3:0}, \read(*p1)=0, a={8:0}, b={3:0}, p1={11:0}, p2={10:0}] [L36] COND TRUE *p1 == 0 [L42] CALL reach_error() [L3] __assert_fail("0", "test06.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 19 SDslu, 41 SDs, 0 SdLazy, 57 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 882 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...