/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 05:16:27,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 05:16:27,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 05:16:27,148 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 05:16:27,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 05:16:27,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 05:16:27,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 05:16:27,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 05:16:27,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 05:16:27,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 05:16:27,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 05:16:27,161 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 05:16:27,161 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 05:16:27,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 05:16:27,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 05:16:27,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 05:16:27,169 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 05:16:27,170 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 05:16:27,175 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 05:16:27,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 05:16:27,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 05:16:27,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 05:16:27,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 05:16:27,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 05:16:27,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 05:16:27,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 05:16:27,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 05:16:27,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 05:16:27,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 05:16:27,225 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 05:16:27,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 05:16:27,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 05:16:27,227 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 05:16:27,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 05:16:27,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 05:16:27,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 05:16:27,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 05:16:27,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 05:16:27,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 05:16:27,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 05:16:27,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 05:16:27,229 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 05:16:27,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 05:16:27,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 05:16:27,229 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 05:16:27,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 05:16:27,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 05:16:27,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 05:16:27,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 05:16:27,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 05:16:27,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 05:16:27,231 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 05:16:27,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 05:16:27,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 05:16:27,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 05:16:27,626 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 05:16:27,626 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 05:16:27,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2020-11-07 05:16:27,706 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128b9f40c/22bd543bda3843008cd8f5ea2fc59ce1/FLAGf21118af3 [2020-11-07 05:16:28,316 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 05:16:28,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2020-11-07 05:16:28,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128b9f40c/22bd543bda3843008cd8f5ea2fc59ce1/FLAGf21118af3 [2020-11-07 05:16:28,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/128b9f40c/22bd543bda3843008cd8f5ea2fc59ce1 [2020-11-07 05:16:28,706 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 05:16:28,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 05:16:28,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 05:16:28,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 05:16:28,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 05:16:28,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:16:28" (1/1) ... [2020-11-07 05:16:28,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcf6afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28, skipping insertion in model container [2020-11-07 05:16:28,726 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 05:16:28" (1/1) ... [2020-11-07 05:16:28,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 05:16:28,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 05:16:28,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:16:28,921 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 05:16:28,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 05:16:28,953 INFO L208 MainTranslator]: Completed translation [2020-11-07 05:16:28,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28 WrapperNode [2020-11-07 05:16:28,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 05:16:28,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 05:16:28,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 05:16:28,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 05:16:28,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28" (1/1) ... [2020-11-07 05:16:28,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28" (1/1) ... [2020-11-07 05:16:28,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28" (1/1) ... [2020-11-07 05:16:28,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28" (1/1) ... [2020-11-07 05:16:28,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28" (1/1) ... [2020-11-07 05:16:28,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28" (1/1) ... [2020-11-07 05:16:28,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28" (1/1) ... [2020-11-07 05:16:28,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 05:16:28,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 05:16:28,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 05:16:28,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 05:16:28,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28" (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 [2020-11-07 05:16:29,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 05:16:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 05:16:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 05:16:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-11-07 05:16:29,070 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-11-07 05:16:29,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 05:16:29,071 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 05:16:29,071 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 05:16:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 05:16:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 05:16:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-11-07 05:16:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 05:16:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 05:16:29,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 05:16:29,073 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-11-07 05:16:29,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 05:16:29,073 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 05:16:29,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 05:16:29,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 05:16:29,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 05:16:29,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 05:16:29,532 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 05:16:29,532 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 05:16:29,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:16:29 BoogieIcfgContainer [2020-11-07 05:16:29,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 05:16:29,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 05:16:29,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 05:16:29,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 05:16:29,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 05:16:28" (1/3) ... [2020-11-07 05:16:29,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e3ddfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:16:29, skipping insertion in model container [2020-11-07 05:16:29,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 05:16:28" (2/3) ... [2020-11-07 05:16:29,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41e3ddfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 05:16:29, skipping insertion in model container [2020-11-07 05:16:29,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 05:16:29" (3/3) ... [2020-11-07 05:16:29,567 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2020-11-07 05:16:29,581 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 05:16:29,585 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 05:16:29,596 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 05:16:29,620 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 05:16:29,620 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 05:16:29,621 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 05:16:29,621 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 05:16:29,621 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 05:16:29,621 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 05:16:29,621 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 05:16:29,621 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 05:16:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2020-11-07 05:16:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-07 05:16:29,649 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:16:29,650 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] [2020-11-07 05:16:29,650 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:16:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:16:29,657 INFO L82 PathProgramCache]: Analyzing trace with hash 690686334, now seen corresponding path program 1 times [2020-11-07 05:16:29,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:16:29,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471187571] [2020-11-07 05:16:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:16:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:16:30,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 05:16:30,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:16:30,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-07 05:16:30,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 05:16:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 05:16:30,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471187571] [2020-11-07 05:16:30,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 05:16:30,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 05:16:30,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438810993] [2020-11-07 05:16:30,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 05:16:30,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 05:16:30,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 05:16:30,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-11-07 05:16:30,175 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 11 states. [2020-11-07 05:16:30,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 05:16:30,888 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2020-11-07 05:16:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-07 05:16:30,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-11-07 05:16:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 05:16:30,898 INFO L225 Difference]: With dead ends: 115 [2020-11-07 05:16:30,898 INFO L226 Difference]: Without dead ends: 58 [2020-11-07 05:16:30,902 INFO L677 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 [2020-11-07 05:16:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-07 05:16:30,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-11-07 05:16:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-07 05:16:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 57 transitions. [2020-11-07 05:16:30,954 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 57 transitions. Word has length 45 [2020-11-07 05:16:30,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 05:16:30,955 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 57 transitions. [2020-11-07 05:16:30,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 05:16:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 57 transitions. [2020-11-07 05:16:30,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-07 05:16:30,957 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 05:16:30,958 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, 1, 1, 1, 1, 1, 1] [2020-11-07 05:16:30,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 05:16:30,958 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 05:16:30,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 05:16:30,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1893205753, now seen corresponding path program 1 times [2020-11-07 05:16:30,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 05:16:30,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092999327] [2020-11-07 05:16:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 05:16:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:16:31,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:16:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 05:16:31,217 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 05:16:31,264 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 05:16:31,264 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 05:16:31,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 05:16:31,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 05:16:31 BoogieIcfgContainer [2020-11-07 05:16:31,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 05:16:31,332 INFO L168 Benchmark]: Toolchain (without parser) took 2623.02 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.1 MB in the beginning and 92.8 MB in the end (delta: 34.3 MB). Peak memory consumption was 65.7 MB. Max. memory is 8.0 GB. [2020-11-07 05:16:31,333 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 05:16:31,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.55 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-07 05:16:31,335 INFO L168 Benchmark]: Boogie Preprocessor took 34.24 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 05:16:31,336 INFO L168 Benchmark]: RCFGBuilder took 564.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 134.0 MB in the end (delta: -18.6 MB). Peak memory consumption was 27.2 MB. Max. memory is 8.0 GB. [2020-11-07 05:16:31,337 INFO L168 Benchmark]: TraceAbstraction took 1773.31 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.0 MB in the beginning and 92.8 MB in the end (delta: 41.2 MB). Peak memory consumption was 72.1 MB. Max. memory is 8.0 GB. [2020-11-07 05:16:31,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 238.55 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.24 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 564.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 134.0 MB in the end (delta: -18.6 MB). Peak memory consumption was 27.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1773.31 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.0 MB in the beginning and 92.8 MB in the end (delta: 41.2 MB). Peak memory consumption was 72.1 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; VAL [a={10:0}, b={11:0}] [L24] int *p1, *p2; VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L26] p1 = &a VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L27] p2 = &b VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L29] b = 1 VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L30] a = 5 VAL [a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L32] EXPR \read(a) VAL [\read(a)=5, a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L32] a-- VAL [\read(a)=5, a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L34] EXPR \read(a) VAL [\read(a)=4, a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L34] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={13:0}, p2={3:0}] [L14] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}] [L15] CALL g(p1, p2) VAL [p1={13:0}, p2={3:0}] [L7] EXPR \read(**p2) VAL [\read(**p2)={11:0}, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}] [L7] int *pq = *p2; VAL [\read(**p2)={11:0}, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}, pq={11:0}] [L9] EXPR \read(**p2) VAL [\read(**p2)={11:0}, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}, pq={11:0}] [L9] *p1 = *p2 VAL [\read(**p2)={11:0}, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}, pq={11:0}] [L10] *pq = 0 VAL [p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}, pq={11:0}] [L15] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}] [L16] return 1; VAL [\old(a)=4, \result=1, a=4, p1={13:0}, p1={13:0}, p2={3:0}, p2={3:0}] [L34] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={10:0}, b={11:0}, f(a, &p1, &p2)=1, p1={13:0}, p2={3:0}] [L34] a = f(a, &p1, &p2) VAL [\read(a)=4, a={10:0}, b={11:0}, f(a, &p1, &p2)=1, p1={13:0}, p2={3:0}] [L36] EXPR \read(*p1) VAL [\read(*p1)=0, \read(*p1)={11:0}, a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L36] COND TRUE *p1 == 0 VAL [\read(*p1)={11:0}, \read(*p1)=0, a={10:0}, b={11:0}, p1={13:0}, p2={3:0}] [L42] CALL reach_error() [L3] __assert_fail("0", "test06.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 59 SDtfs, 58 SDslu, 262 SDs, 0 SdLazy, 335 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s 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=86occurred 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, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 5632 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...