/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_VARIABLES --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/loops/while_infinite_loop_4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:49:09,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:49:09,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:49:09,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:49:09,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:49:09,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:49:09,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:49:09,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:49:09,203 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:49:09,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:49:09,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:49:09,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:49:09,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:49:09,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:49:09,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:49:09,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:49:09,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:49:09,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:49:09,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:49:09,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:49:09,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:49:09,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:49:09,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:49:09,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:49:09,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:49:09,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:49:09,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:49:09,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:49:09,254 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 01:49:09,287 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:49:09,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:49:09,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:49:09,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:49:09,291 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:49:09,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:49:09,292 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:49:09,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:49:09,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:49:09,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:49:09,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:49:09,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:49:09,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:49:09,296 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:49:09,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:49:09,296 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:49:09,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:49:09,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:49:09,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:49:09,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:49:09,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:49:09,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:49:09,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:49:09,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:49:09,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:49:09,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:49:09,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:49:09,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:49:09,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:49:09,305 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_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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:49:09,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:49:09,616 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:49:09,619 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:49:09,621 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:49:09,621 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:49:09,622 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-20 01:49:09,687 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ea80724/66f11266f7644612b6e7b71834905382/FLAGc18a0058f [2020-07-20 01:49:10,172 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:49:10,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-07-20 01:49:10,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ea80724/66f11266f7644612b6e7b71834905382/FLAGc18a0058f [2020-07-20 01:49:10,540 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32ea80724/66f11266f7644612b6e7b71834905382 [2020-07-20 01:49:10,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:49:10,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:49:10,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:49:10,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:49:10,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:49:10,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:49:10" (1/1) ... [2020-07-20 01:49:10,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e02ae07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10, skipping insertion in model container [2020-07-20 01:49:10,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:49:10" (1/1) ... [2020-07-20 01:49:10,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:49:10,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:49:10,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:49:10,801 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:49:10,813 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:49:10,826 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:49:10,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10 WrapperNode [2020-07-20 01:49:10,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:49:10,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:49:10,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:49:10,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:49:10,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10" (1/1) ... [2020-07-20 01:49:10,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10" (1/1) ... [2020-07-20 01:49:10,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10" (1/1) ... [2020-07-20 01:49:10,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10" (1/1) ... [2020-07-20 01:49:10,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10" (1/1) ... [2020-07-20 01:49:10,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10" (1/1) ... [2020-07-20 01:49:10,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10" (1/1) ... [2020-07-20 01:49:10,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:49:10,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:49:10,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:49:10,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:49:10,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10" (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 01:49:11,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:49:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:49:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:49:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-20 01:49:11,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:49:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:49:11,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:49:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-20 01:49:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:49:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:49:11,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:49:11,165 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:49:11,165 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 01:49:11,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:49:11 BoogieIcfgContainer [2020-07-20 01:49:11,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:49:11,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:49:11,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:49:11,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:49:11,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:49:10" (1/3) ... [2020-07-20 01:49:11,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186b139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:49:11, skipping insertion in model container [2020-07-20 01:49:11,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:49:10" (2/3) ... [2020-07-20 01:49:11,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@186b139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:49:11, skipping insertion in model container [2020-07-20 01:49:11,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:49:11" (3/3) ... [2020-07-20 01:49:11,177 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-07-20 01:49:11,186 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:49:11,192 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:49:11,206 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:49:11,230 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:49:11,231 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:49:11,231 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:49:11,231 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:49:11,231 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:49:11,231 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:49:11,232 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:49:11,232 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:49:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 01:49:11,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 01:49:11,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:11,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:11,253 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1783967560, now seen corresponding path program 1 times [2020-07-20 01:49:11,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:11,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83885707] [2020-07-20 01:49:11,268 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57d070ed [2020-07-20 01:49:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:49:11,411 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 01:49:11,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83885707] [2020-07-20 01:49:11,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:49:11,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 01:49:11,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348708179] [2020-07-20 01:49:11,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:49:11,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:49:11,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:49:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:49:11,436 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-07-20 01:49:11,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:49:11,506 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2020-07-20 01:49:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:49:11,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-20 01:49:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:49:11,523 INFO L225 Difference]: With dead ends: 37 [2020-07-20 01:49:11,524 INFO L226 Difference]: Without dead ends: 19 [2020-07-20 01:49:11,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 01:49:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-20 01:49:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-07-20 01:49:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 01:49:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 01:49:11,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-07-20 01:49:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:49:11,590 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 01:49:11,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:49:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 01:49:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 01:49:11,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:49:11,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:49:11,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:49:11,593 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:49:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:49:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1698359207, now seen corresponding path program 1 times [2020-07-20 01:49:11,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:49:11,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274264442] [2020-07-20 01:49:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@57d070ed [2020-07-20 01:49:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:49:11,618 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:49:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:49:11,630 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:49:11,653 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:49:11,653 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:49:11,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 01:49:11,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:49:11 BoogieIcfgContainer [2020-07-20 01:49:11,691 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:49:11,694 INFO L168 Benchmark]: Toolchain (without parser) took 1143.02 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 102.6 MB in the beginning and 146.4 MB in the end (delta: -43.7 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:49:11,696 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 01:49:11,697 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.73 ms. Allocated memory is still 146.3 MB. Free memory was 102.2 MB in the beginning and 92.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:49:11,699 INFO L168 Benchmark]: Boogie Preprocessor took 115.60 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 92.9 MB in the beginning and 183.2 MB in the end (delta: -90.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:49:11,700 INFO L168 Benchmark]: RCFGBuilder took 226.31 ms. Allocated memory is still 203.9 MB. Free memory was 183.2 MB in the beginning and 172.0 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:49:11,701 INFO L168 Benchmark]: TraceAbstraction took 520.85 ms. Allocated memory is still 203.9 MB. Free memory was 172.0 MB in the beginning and 146.4 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:49:11,705 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.73 ms. Allocated memory is still 146.3 MB. Free memory was 102.2 MB in the beginning and 92.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.60 ms. Allocated memory was 146.3 MB in the beginning and 203.9 MB in the end (delta: 57.7 MB). Free memory was 92.9 MB in the beginning and 183.2 MB in the end (delta: -90.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 226.31 ms. Allocated memory is still 203.9 MB. Free memory was 183.2 MB in the beginning and 172.0 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 520.85 ms. Allocated memory is still 203.9 MB. Free memory was 172.0 MB in the beginning and 146.4 MB in the end (delta: 25.7 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int x=0; VAL [\old(x)=2, x=0] [L24] COND TRUE 1 VAL [\old(x)=0, x=0] [L26] CALL eval() VAL [\old(x)=0, x=0] [L14] COND TRUE 1 [L15] x=1 VAL [\old(x)=0, x=1] [L26] RET eval() VAL [\old(x)=0, x=1] [L27] CALL __VERIFIER_assert(x==0) VAL [\old(cond)=0, \old(x)=0, x=1] [L4] COND TRUE !(cond) VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] [L5] __VERIFIER_error() VAL [\old(cond)=0, \old(x)=0, cond=0, x=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 6 SDslu, 5 SDs, 0 SdLazy, 4 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...