/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.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:20:03,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:20:03,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:20:03,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 23:20:03,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 23:20:03,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 23:20:03,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 23:20:03,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 23:20:03,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 23:20:03,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 23:20:03,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 23:20:03,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 23:20:03,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:20:03,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:20:03,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:20:03,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:20:03,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:20:03,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:20:03,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:20:03,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:20:03,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:20:03,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:20:03,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:20:03,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:20:03,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:20:03,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:20:03,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:20:03,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:20:03,354 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 [2020-07-19 23:20:03,372 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:20:03,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:20:03,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:20:03,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:20:03,375 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:20:03,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:20:03,375 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:20:03,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:20:03,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:20:03,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:20:03,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:20:03,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:20:03,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:20:03,378 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:20:03,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:20:03,380 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:20:03,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:20:03,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:20:03,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:20:03,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:20:03,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:20:03,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:20:03,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:20:03,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:20:03,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:20:03,382 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:20:03,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:20:03,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:20:03,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:20:03,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-19 23:20:03,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:20:03,717 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:20:03,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:20:03,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:20:03,723 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:20:03,724 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2020-07-19 23:20:03,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9736d2e8f/9f69d218c2e14ea592f89850a505e9e2/FLAGcd1c1d0c4 [2020-07-19 23:20:04,375 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:20:04,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2020-07-19 23:20:04,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9736d2e8f/9f69d218c2e14ea592f89850a505e9e2/FLAGcd1c1d0c4 [2020-07-19 23:20:04,695 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9736d2e8f/9f69d218c2e14ea592f89850a505e9e2 [2020-07-19 23:20:04,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:20:04,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:20:04,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:20:04,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:20:04,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:20:04,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:20:04" (1/1) ... [2020-07-19 23:20:04,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e0c999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:04, skipping insertion in model container [2020-07-19 23:20:04,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:20:04" (1/1) ... [2020-07-19 23:20:04,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:20:04,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:20:05,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:20:05,023 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:20:05,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:20:05,053 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:20:05,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05 WrapperNode [2020-07-19 23:20:05,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:20:05,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:20:05,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:20:05,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:20:05,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05" (1/1) ... [2020-07-19 23:20:05,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05" (1/1) ... [2020-07-19 23:20:05,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05" (1/1) ... [2020-07-19 23:20:05,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05" (1/1) ... [2020-07-19 23:20:05,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05" (1/1) ... [2020-07-19 23:20:05,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05" (1/1) ... [2020-07-19 23:20:05,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05" (1/1) ... [2020-07-19 23:20:05,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:20:05,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:20:05,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:20:05,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:20:05,187 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05" (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 [2020-07-19 23:20:05,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:20:05,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:20:05,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:20:05,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:20:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 23:20:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:20:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 23:20:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 23:20:05,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 23:20:05,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 23:20:05,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:20:05,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:20:05,481 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:20:05,481 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:20:05,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:20:05 BoogieIcfgContainer [2020-07-19 23:20:05,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:20:05,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:20:05,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:20:05,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:20:05,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:20:04" (1/3) ... [2020-07-19 23:20:05,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab77672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:20:05, skipping insertion in model container [2020-07-19 23:20:05,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:20:05" (2/3) ... [2020-07-19 23:20:05,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ab77672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:20:05, skipping insertion in model container [2020-07-19 23:20:05,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:20:05" (3/3) ... [2020-07-19 23:20:05,494 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-07-19 23:20:05,506 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:20:05,514 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:20:05,530 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:20:05,598 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:20:05,599 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:20:05,599 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:20:05,599 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:20:05,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:20:05,602 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:20:05,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:20:05,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:20:05,635 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-07-19 23:20:05,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:20:05,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:05,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:20:05,643 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:05,650 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2020-07-19 23:20:05,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:05,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23818702] [2020-07-19 23:20:05,662 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5f59ba [2020-07-19 23:20:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:05,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23818702] [2020-07-19 23:20:05,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:20:05,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-19 23:20:05,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739650141] [2020-07-19 23:20:05,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:20:05,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:05,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:20:05,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:20:05,974 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 8 states. [2020-07-19 23:20:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:06,178 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2020-07-19 23:20:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:20:06,181 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-07-19 23:20:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:06,191 INFO L225 Difference]: With dead ends: 29 [2020-07-19 23:20:06,192 INFO L226 Difference]: Without dead ends: 14 [2020-07-19 23:20:06,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:20:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-19 23:20:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-19 23:20:06,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-19 23:20:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-19 23:20:06,242 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 13 [2020-07-19 23:20:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:06,243 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-19 23:20:06,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:20:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-19 23:20:06,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:20:06,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:06,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:20:06,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:20:06,245 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:06,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:06,246 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2020-07-19 23:20:06,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:06,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973376484] [2020-07-19 23:20:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5f59ba [2020-07-19 23:20:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:20:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:20:06,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973376484] [2020-07-19 23:20:06,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:20:06,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-19 23:20:06,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543198299] [2020-07-19 23:20:06,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 23:20:06,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:20:06,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 23:20:06,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-19 23:20:06,389 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-07-19 23:20:06,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:20:06,460 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2020-07-19 23:20:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:20:06,460 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-07-19 23:20:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:20:06,461 INFO L225 Difference]: With dead ends: 21 [2020-07-19 23:20:06,461 INFO L226 Difference]: Without dead ends: 14 [2020-07-19 23:20:06,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:20:06,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-19 23:20:06,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-19 23:20:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-19 23:20:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2020-07-19 23:20:06,468 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2020-07-19 23:20:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:20:06,468 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2020-07-19 23:20:06,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 23:20:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2020-07-19 23:20:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:20:06,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:20:06,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:20:06,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 23:20:06,470 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:20:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:20:06,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1852956943, now seen corresponding path program 1 times [2020-07-19 23:20:06,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:20:06,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22521647] [2020-07-19 23:20:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f5f59ba [2020-07-19 23:20:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:20:06,490 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:20:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:20:06,505 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:20:06,530 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:20:06,530 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:20:06,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-19 23:20:06,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:20:06 BoogieIcfgContainer [2020-07-19 23:20:06,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:20:06,570 INFO L168 Benchmark]: Toolchain (without parser) took 1861.71 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 100.4 MB in the beginning and 102.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 61.8 MB. Max. memory is 7.1 GB. [2020-07-19 23:20:06,571 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:20:06,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.86 ms. Allocated memory is still 136.8 MB. Free memory was 99.9 MB in the beginning and 90.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-19 23:20:06,574 INFO L168 Benchmark]: Boogie Preprocessor took 130.27 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 178.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-19 23:20:06,575 INFO L168 Benchmark]: RCFGBuilder took 299.85 ms. Allocated memory is still 200.8 MB. Free memory was 178.3 MB in the beginning and 164.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:20:06,575 INFO L168 Benchmark]: TraceAbstraction took 1080.50 ms. Allocated memory is still 200.8 MB. Free memory was 163.7 MB in the beginning and 102.5 MB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2020-07-19 23:20:06,579 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 136.8 MB. Free memory was 118.6 MB in the beginning and 118.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.86 ms. Allocated memory is still 136.8 MB. Free memory was 99.9 MB in the beginning and 90.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.27 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.1 MB in the beginning and 178.3 MB in the end (delta: -88.2 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.85 ms. Allocated memory is still 200.8 MB. Free memory was 178.3 MB in the beginning and 164.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1080.50 ms. Allocated memory is still 200.8 MB. Free memory was 163.7 MB in the beginning and 102.5 MB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] struct dummy d1, d2; [L13] int n = __VERIFIER_nondet_int(); [L14] EXPR n ? &d1 : &d2 VAL [d1={3:0}, d2={2:0}, n=0, n ? &d1 : &d2={2:0}] [L14] struct dummy *pd = n ? &d1 : &d2; [L15] COND TRUE pd == &d2 [L16] pd->a = 0 VAL [d1={3:0}, d2={2:0}, n=0, pd={2:0}] [L20] pd == &d2 && d2.b != 0 [L20] EXPR d2.b [L20] pd == &d2 && d2.b != 0 VAL [d1={3:0}, d2={2:0}, d2.b=11, n=0, pd={2:0}, pd == &d2 && d2.b != 0=1] [L20] COND TRUE pd == &d2 && d2.b != 0 [L26] __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: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 15 SDtfs, 31 SDslu, 63 SDs, 0 SdLazy, 95 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 732 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 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...