/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:15:10,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:15:10,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:15:10,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:15:10,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:15:10,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:15:10,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:15:10,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:15:10,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:15:10,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:15:10,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:15:10,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:15:10,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:15:10,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:15:10,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:15:10,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:15:10,191 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:15:10,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:15:10,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:15:10,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:15:10,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:15:10,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:15:10,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:15:10,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:15:10,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:15:10,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:15:10,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:15:10,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:15:10,224 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 [2020-07-20 17:15:10,260 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:15:10,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:15:10,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:15:10,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:15:10,265 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:15:10,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:15:10,265 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:15:10,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:15:10,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:15:10,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:15:10,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:15:10,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:15:10,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:15:10,268 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:15:10,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:15:10,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:15:10,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:15:10,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:15:10,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:15:10,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:15:10,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:15:10,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:15:10,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:15:10,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:15:10,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:15:10,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:15:10,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:10,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:15:10,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:15:10,272 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:15:10,595 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:15:10,609 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:15:10,613 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:15:10,614 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:15:10,615 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:15:10,616 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2020-07-20 17:15:10,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb1d6cfa3/aebc986bb7424a88815a14dfc4f811ef/FLAGa8a26b98b [2020-07-20 17:15:11,114 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:15:11,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c [2020-07-20 17:15:11,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb1d6cfa3/aebc986bb7424a88815a14dfc4f811ef/FLAGa8a26b98b [2020-07-20 17:15:11,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb1d6cfa3/aebc986bb7424a88815a14dfc4f811ef [2020-07-20 17:15:11,486 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:15:11,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:15:11,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:15:11,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:15:11,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:15:11,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:15:11" (1/1) ... [2020-07-20 17:15:11,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c2a4ebe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11, skipping insertion in model container [2020-07-20 17:15:11,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:15:11" (1/1) ... [2020-07-20 17:15:11,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:15:11,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:15:11,739 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:15:11,753 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:15:11,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:15:11,796 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:15:11,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11 WrapperNode [2020-07-20 17:15:11,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:15:11,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:15:11,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:15:11,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:15:11,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11" (1/1) ... [2020-07-20 17:15:11,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11" (1/1) ... [2020-07-20 17:15:11,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11" (1/1) ... [2020-07-20 17:15:11,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11" (1/1) ... [2020-07-20 17:15:11,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11" (1/1) ... [2020-07-20 17:15:11,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11" (1/1) ... [2020-07-20 17:15:11,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11" (1/1) ... [2020-07-20 17:15:11,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:15:11,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:15:11,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:15:11,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:15:11,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11" (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 [2020-07-20 17:15:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:15:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:15:12,023 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:15:12,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:15:12,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:15:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:15:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:15:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:15:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:15:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:15:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:15:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:15:12,249 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:15:12,249 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 17:15:12,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:15:12 BoogieIcfgContainer [2020-07-20 17:15:12,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:15:12,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:15:12,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:15:12,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:15:12,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:15:11" (1/3) ... [2020-07-20 17:15:12,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b9ce37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:15:12, skipping insertion in model container [2020-07-20 17:15:12,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:15:11" (2/3) ... [2020-07-20 17:15:12,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b9ce37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:15:12, skipping insertion in model container [2020-07-20 17:15:12,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:15:12" (3/3) ... [2020-07-20 17:15:12,268 INFO L109 eAbstractionObserver]: Analyzing ICFG test29-1.c [2020-07-20 17:15:12,297 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:15:12,308 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:15:12,342 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:15:12,376 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:15:12,377 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:15:12,377 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:15:12,377 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:15:12,377 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:15:12,377 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:15:12,378 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:15:12,378 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:15:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-20 17:15:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:15:12,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:15:12,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:15:12,420 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:15:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:15:12,426 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-07-20 17:15:12,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:15:12,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538763354] [2020-07-20 17:15:12,433 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:12,529 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:15:12,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:15:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 17:15:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:15:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:15:12,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:15:12,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538763354] [2020-07-20 17:15:12,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:15:12,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:15:12,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145954414] [2020-07-20 17:15:12,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:15:12,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:15:12,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:15:12,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:15:12,626 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2020-07-20 17:15:12,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:15:12,702 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-07-20 17:15:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:15:12,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-07-20 17:15:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:15:12,716 INFO L225 Difference]: With dead ends: 34 [2020-07-20 17:15:12,716 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 17:15:12,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:15:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 17:15:12,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-07-20 17:15:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-20 17:15:12,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-07-20 17:15:12,762 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-07-20 17:15:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:15:12,763 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-07-20 17:15:12,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:15:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-07-20 17:15:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:15:12,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:15:12,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:15:12,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:12,980 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:15:12,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:15:12,981 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-07-20 17:15:12,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:15:12,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534628129] [2020-07-20 17:15:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:13,029 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 17:15:13,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:15:13,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 17:15:13,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:15:13,112 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:15:13,113 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2020-07-20 17:15:13,115 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 17:15:13,118 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 17:15:13,118 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-20 17:15:13,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:4 [2020-07-20 17:15:13,141 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 17:15:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:15:13,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:15:13,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534628129] [2020-07-20 17:15:13,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:15:13,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 17:15:13,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790059690] [2020-07-20 17:15:13,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 17:15:13,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:15:13,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 17:15:13,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 17:15:13,157 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-07-20 17:15:13,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:15:13,261 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-20 17:15:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 17:15:13,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 17:15:13,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:15:13,264 INFO L225 Difference]: With dead ends: 23 [2020-07-20 17:15:13,264 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 17:15:13,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-20 17:15:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 17:15:13,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 17:15:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 17:15:13,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-07-20 17:15:13,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-07-20 17:15:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:15:13,276 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-07-20 17:15:13,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 17:15:13,277 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-07-20 17:15:13,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 17:15:13,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:15:13,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:15:13,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:13,480 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:15:13,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:15:13,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2020-07-20 17:15:13,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:15:13,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936230759] [2020-07-20 17:15:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:13,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:15:13,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:15:13,552 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:15:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:15:13,569 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:15:13,613 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:15:13,614 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:15:13,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:15:13,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:15:13 BoogieIcfgContainer [2020-07-20 17:15:13,859 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:15:13,862 INFO L168 Benchmark]: Toolchain (without parser) took 2373.81 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 103.1 MB in the beginning and 102.7 MB in the end (delta: 455.4 kB). Peak memory consumption was 58.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:13,863 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 17:15:13,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.50 ms. Allocated memory is still 145.2 MB. Free memory was 102.7 MB in the beginning and 92.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:13,864 INFO L168 Benchmark]: Boogie Preprocessor took 158.50 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 92.9 MB in the beginning and 180.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:13,865 INFO L168 Benchmark]: RCFGBuilder took 297.37 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 166.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:13,868 INFO L168 Benchmark]: TraceAbstraction took 1604.42 ms. Allocated memory is still 202.9 MB. Free memory was 166.0 MB in the beginning and 102.7 MB in the end (delta: 63.3 MB). Peak memory consumption was 63.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:15:13,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.50 ms. Allocated memory is still 145.2 MB. Free memory was 102.7 MB in the beginning and 92.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.50 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 92.9 MB in the beginning and 180.6 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 297.37 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 166.6 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1604.42 ms. Allocated memory is still 202.9 MB. Free memory was 166.0 MB in the beginning and 102.7 MB in the end (delta: 63.3 MB). Peak memory consumption was 63.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] union dummy d1, d2; [L14] int n = __VERIFIER_nondet_int(); [L15] EXPR n ? &d1 : &d2 VAL [d1={3:0}, d2={2:0}, n=0, n ? &d1 : &d2={2:0}] [L15] union dummy *pd = n ? &d1 : &d2; [L16] d1.a = __VERIFIER_nondet_int() [L17] COND FALSE !(pd == &d1) [L20] pd->b = 0 VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L22] pd == &d2 && d1.a != 0 [L22] EXPR d1.a [L22] pd == &d2 && d1.a != 0 VAL [d1={3:0}, d1.a=-1, d2={2:0}, n=0, pd={2:0}, pd == &d2 && d1.a != 0=1] [L22] COND TRUE pd == &d2 && d1.a != 0 [L28] __VERIFIER_error() VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 19 SDslu, 43 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 39 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 588 SizeOfPredicates, 11 NumberOfNonLiveVariables, 115 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...