/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.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/test22-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:19:31,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:19:31,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:19:31,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:19:31,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:19:31,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:19:31,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:19:31,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:19:31,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:19:31,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:19:31,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:19:31,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:19:31,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:19:31,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:19:31,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:19:31,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:19:31,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:19:31,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:19:31,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:19:31,685 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:19:31,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:19:31,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:19:31,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:19:31,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:19:31,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:19:31,704 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:19:31,705 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:19:31,706 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:19:31,707 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:19:31,718 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:19:31,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:19:31,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:19:31,720 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:19:31,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:19:31,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:19:31,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:19:31,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:19:31,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:19:31,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:19:31,721 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:19:31,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:19:31,722 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:19:31,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:19:31,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:19:31,722 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:19:31,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:19:31,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:19:31,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:19:31,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:19:31,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:19:31,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:19:31,724 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-08-22 22:19:32,048 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:19:32,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:19:32,067 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:19:32,069 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:19:32,070 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:19:32,071 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-2.c [2020-08-22 22:19:32,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f8f65a0/5a6527560f694a41bd8357205fa2c50e/FLAGa80c5a525 [2020-08-22 22:19:32,750 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:19:32,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c [2020-08-22 22:19:32,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f8f65a0/5a6527560f694a41bd8357205fa2c50e/FLAGa80c5a525 [2020-08-22 22:19:33,171 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f8f65a0/5a6527560f694a41bd8357205fa2c50e [2020-08-22 22:19:33,183 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:19:33,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:19:33,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:33,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:19:33,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:19:33,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:33" (1/1) ... [2020-08-22 22:19:33,198 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21f1093a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33, skipping insertion in model container [2020-08-22 22:19:33,198 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:19:33" (1/1) ... [2020-08-22 22:19:33,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:19:33,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:19:33,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:33,454 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:19:33,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:19:33,491 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:19:33,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33 WrapperNode [2020-08-22 22:19:33,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:19:33,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:19:33,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:19:33,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:19:33,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33" (1/1) ... [2020-08-22 22:19:33,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33" (1/1) ... [2020-08-22 22:19:33,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33" (1/1) ... [2020-08-22 22:19:33,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33" (1/1) ... [2020-08-22 22:19:33,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33" (1/1) ... [2020-08-22 22:19:33,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33" (1/1) ... [2020-08-22 22:19:33,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33" (1/1) ... [2020-08-22 22:19:33,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:19:33,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:19:33,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:19:33,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:19:33,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33" (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 [2020-08-22 22:19:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:19:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:19:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-22 22:19:33,713 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2020-08-22 22:19:33,714 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-08-22 22:19:33,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:19:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:19:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:19:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 22:19:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 22:19:33,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:19:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2020-08-22 22:19:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-08-22 22:19:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:19:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:19:33,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:19:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:19:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-08-22 22:19:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:19:33,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:19:34,164 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:19:34,165 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 22:19:34,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:19:34 BoogieIcfgContainer [2020-08-22 22:19:34,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:19:34,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:19:34,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:19:34,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:19:34,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:19:33" (1/3) ... [2020-08-22 22:19:34,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45745560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:19:34, skipping insertion in model container [2020-08-22 22:19:34,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:19:33" (2/3) ... [2020-08-22 22:19:34,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45745560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:19:34, skipping insertion in model container [2020-08-22 22:19:34,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:19:34" (3/3) ... [2020-08-22 22:19:34,180 INFO L109 eAbstractionObserver]: Analyzing ICFG test22-2.c [2020-08-22 22:19:34,191 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:19:34,200 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:19:34,217 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:19:34,243 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:19:34,244 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:19:34,244 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:19:34,244 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:19:34,244 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:19:34,244 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:19:34,244 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:19:34,245 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:19:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-08-22 22:19:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 22:19:34,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:34,279 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:34,279 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2026025413, now seen corresponding path program 1 times [2020-08-22 22:19:34,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:34,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595397830] [2020-08-22 22:19:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:34,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:34,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 22:19:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:34,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:19:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:34,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 22:19:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:34,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 22:19:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:34,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 22:19:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 22:19:34,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595397830] [2020-08-22 22:19:34,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:19:34,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 22:19:34,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210686960] [2020-08-22 22:19:34,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 22:19:34,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:34,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 22:19:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 22:19:34,790 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-08-22 22:19:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:35,212 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2020-08-22 22:19:35,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 22:19:35,215 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-08-22 22:19:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:35,229 INFO L225 Difference]: With dead ends: 107 [2020-08-22 22:19:35,230 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 22:19:35,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:19:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 22:19:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-22 22:19:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 22:19:35,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-08-22 22:19:35,335 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 83 [2020-08-22 22:19:35,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:35,338 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-08-22 22:19:35,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 22:19:35,338 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-08-22 22:19:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 22:19:35,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:35,343 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:35,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:19:35,344 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:35,345 INFO L82 PathProgramCache]: Analyzing trace with hash 177245466, now seen corresponding path program 1 times [2020-08-22 22:19:35,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:35,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183724736] [2020-08-22 22:19:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 22:19:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:19:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 22:19:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 22:19:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 22:19:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-08-22 22:19:35,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183724736] [2020-08-22 22:19:35,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:19:35,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:19:35,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957596804] [2020-08-22 22:19:35,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:19:35,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:35,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:19:35,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:19:35,526 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 5 states. [2020-08-22 22:19:35,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:35,900 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-08-22 22:19:35,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:19:35,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-08-22 22:19:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:35,903 INFO L225 Difference]: With dead ends: 106 [2020-08-22 22:19:35,904 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 22:19:35,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-22 22:19:35,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 22:19:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-08-22 22:19:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 22:19:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-22 22:19:35,927 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 85 [2020-08-22 22:19:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:35,928 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-22 22:19:35,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:19:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-22 22:19:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 22:19:35,931 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:35,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:35,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:19:35,932 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:35,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:35,932 INFO L82 PathProgramCache]: Analyzing trace with hash 679818391, now seen corresponding path program 1 times [2020-08-22 22:19:35,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:35,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662892121] [2020-08-22 22:19:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:19:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-08-22 22:19:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 22:19:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 22:19:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 22:19:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 22:19:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:19:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 22:19:36,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662892121] [2020-08-22 22:19:36,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 22:19:36,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 22:19:36,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831663291] [2020-08-22 22:19:36,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 22:19:36,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:19:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 22:19:36,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-22 22:19:36,360 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 14 states. [2020-08-22 22:19:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:19:38,136 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2020-08-22 22:19:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 22:19:38,138 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 87 [2020-08-22 22:19:38,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:19:38,147 INFO L225 Difference]: With dead ends: 167 [2020-08-22 22:19:38,147 INFO L226 Difference]: Without dead ends: 153 [2020-08-22 22:19:38,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-08-22 22:19:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-08-22 22:19:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 108. [2020-08-22 22:19:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 22:19:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2020-08-22 22:19:38,209 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 87 [2020-08-22 22:19:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:19:38,212 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2020-08-22 22:19:38,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 22:19:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2020-08-22 22:19:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 22:19:38,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:19:38,224 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 22:19:38,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:19:38,226 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:19:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:19:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash -2022406921, now seen corresponding path program 1 times [2020-08-22 22:19:38,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:19:38,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740775132] [2020-08-22 22:19:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:19:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:19:38,298 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:19:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:19:38,361 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:19:38,407 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:19:38,407 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:19:38,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 22:19:38,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:19:38 BoogieIcfgContainer [2020-08-22 22:19:38,483 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:19:38,486 INFO L168 Benchmark]: Toolchain (without parser) took 5299.96 ms. Allocated memory was 138.4 MB in the beginning and 249.0 MB in the end (delta: 110.6 MB). Free memory was 102.2 MB in the beginning and 112.1 MB in the end (delta: -9.9 MB). Peak memory consumption was 100.7 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:38,488 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 22:19:38,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.99 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 91.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:38,490 INFO L168 Benchmark]: Boogie Preprocessor took 134.42 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 178.5 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:38,497 INFO L168 Benchmark]: RCFGBuilder took 543.20 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 156.3 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:38,498 INFO L168 Benchmark]: TraceAbstraction took 4311.21 ms. Allocated memory was 201.3 MB in the beginning and 249.0 MB in the end (delta: 47.7 MB). Free memory was 155.6 MB in the beginning and 112.1 MB in the end (delta: 43.5 MB). Peak memory consumption was 91.2 MB. Max. memory is 7.1 GB. [2020-08-22 22:19:38,502 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.99 ms. Allocated memory is still 138.4 MB. Free memory was 102.0 MB in the beginning and 91.5 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 134.42 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 91.5 MB in the beginning and 178.5 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 543.20 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 156.3 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4311.21 ms. Allocated memory was 201.3 MB in the beginning and 249.0 MB in the end (delta: 47.7 MB). Free memory was 155.6 MB in the beginning and 112.1 MB in the end (delta: 43.5 MB). Peak memory consumption was 91.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 48]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] struct dummy d1, d2; VAL [\old(d1)=22, \old(d1)=18, \old(d2)=19, \old(d2)=21, d1={3:0}, d2={2:0}] [L32] CALL init() VAL [d1={3:0}, d2={2:0}] [L13] d1.a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=5, d1={3:0}, d2={2:0}] [L14] d1.b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, d1={3:0}, d2={2:0}] [L16] d2.a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=16, d1={3:0}, d2={2:0}] [L17] d2.b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-2, d1={3:0}, d2={2:0}] [L32] RET init() VAL [d1={3:0}, d2={2:0}] [L33] CALL, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}] [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={3:0}, d1={3:0}, d2={2:0}] [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); VAL [\result={3:0}, __VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={3:0}, d1={3:0}, d2={2:0}] [L33] RET, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}, get_dummy()={3:0}] [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); VAL [d1={3:0}, d2={2:0}, get_dummy()={3:0}, pd1={3:0}] [L33] CALL, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}] [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={3:0}, d1={3:0}, d2={2:0}] [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); VAL [\result={3:0}, __VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={3:0}, d1={3:0}, d2={2:0}] [L33] RET, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}, get_dummy()={3:0}, pd1={3:0}] [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); VAL [d1={3:0}, d2={2:0}, get_dummy()={3:0}, pd1={3:0}, pd2={3:0}] [L33] CALL, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}] [L22] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=0, __VERIFIER_nondet_bool() ? &d1 : &d2={2:0}, d1={3:0}, d2={2:0}] [L22] return (__VERIFIER_nondet_bool() ? &d1 : &d2); VAL [\result={2:0}, __VERIFIER_nondet_bool()=0, __VERIFIER_nondet_bool() ? &d1 : &d2={2:0}, d1={3:0}, d2={2:0}] [L33] RET, EXPR get_dummy() VAL [d1={3:0}, d2={2:0}, get_dummy()={2:0}, pd1={3:0}, pd2={3:0}] [L33] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); VAL [d1={3:0}, d2={2:0}, get_dummy()={2:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] [L34] int i = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=0, d1={3:0}, d2={2:0}, i=0, pd1={3:0}, pd2={3:0}, pd3={2:0}] [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [d1={3:0}, d2={2:0}, i=0, pd1={3:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={3:0}, pd3={2:0}] [L35] EXPR (*pd2).a VAL [(*pd2).a=5, d1={3:0}, d2={2:0}, i=0, pd1={3:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={3:0}, pd3={2:0}] [L35] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [(*pd2).a=5, d1={3:0}, d2={2:0}, i=0, pd1={3:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={3:0}, pd3={2:0}] [L35] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [(*pd2).a=5, d1={3:0}, d2={2:0}, i=0, pd1={3:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={3:0}, pd3={2:0}] [L36] int *pa = &pd1->a; VAL [d1={3:0}, d2={2:0}, i=0, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] [L37] EXPR pd3->a VAL [d1={3:0}, d2={2:0}, i=0, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}, pd3->a=16] [L37] i = pd3->a - 10 VAL [d1={3:0}, d2={2:0}, i=6, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}, pd3->a=16] [L38] EXPR \read(*pa) VAL [\read(*pa)=5, d1={3:0}, d2={2:0}, i=6, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] [L38] COND FALSE !(i < *pa) VAL [\read(*pa)=5, d1={3:0}, d2={2:0}, i=6, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] [L41] CALL, EXPR check(pd2, i) VAL [\old(i)=6, d1={3:0}, d2={2:0}, s1={3:0}] [L27] EXPR s1->a VAL [\old(i)=6, d1={3:0}, d2={2:0}, i=6, s1={3:0}, s1={3:0}, s1->a=5] [L27] return s1->a == i; VAL [\old(i)=6, \result=0, d1={3:0}, d2={2:0}, i=6, s1={3:0}, s1={3:0}, s1->a=5] [L41] RET, EXPR check(pd2, i) VAL [check(pd2, i)=0, d1={3:0}, d2={2:0}, i=6, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] [L41] COND TRUE !check(pd2, i) VAL [check(pd2, i)=0, d1={3:0}, d2={2:0}, i=6, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] [L48] __VERIFIER_error() VAL [d1={3:0}, d2={2:0}, i=6, pa={3:0}, pd1={3:0}, pd2={3:0}, pd3={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 88 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 209 SDtfs, 396 SDslu, 76 SDs, 0 SdLazy, 1267 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 45 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 342 NumberOfCodeBlocks, 342 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 252 ConstructedInterpolants, 0 QuantifiedInterpolants, 45528 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 58/63 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...