/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -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 0.1.25-5644d1e-m [2020-08-18 23:39:17,281 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 23:39:17,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:39:17,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:39:17,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:39:17,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:39:17,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:39:17,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:39:17,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:39:17,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:39:17,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:39:17,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:39:17,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:39:17,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:39:17,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:39:17,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:39:17,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:39:17,374 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:39:17,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:39:17,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:39:17,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:39:17,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:39:17,386 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 23:39:17,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:39:17,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:39:17,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:39:17,399 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:39:17,444 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:39:17,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:39:17,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:39:17,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:39:17,447 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:39:17,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:39:17,448 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:39:17,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:39:17,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:39:17,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:39:17,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:39:17,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:39:17,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:39:17,450 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:39:17,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:39:17,451 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:39:17,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:39:17,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:39:17,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:39:17,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:39:17,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:39:17,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:39:17,452 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:39:17,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:39:17,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:39:17,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:39:17,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:39:17,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:39:17,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:39:17,454 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 -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:39:17,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:39:17,763 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:39:17,767 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:39:17,769 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:39:17,769 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:39:17,770 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-08-18 23:39:17,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89063337f/b84e7a8ae668486eaf8695cb20d8ca7a/FLAG3cedd9631 [2020-08-18 23:39:18,319 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:39:18,320 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/while_infinite_loop_4.c [2020-08-18 23:39:18,326 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89063337f/b84e7a8ae668486eaf8695cb20d8ca7a/FLAG3cedd9631 [2020-08-18 23:39:18,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/89063337f/b84e7a8ae668486eaf8695cb20d8ca7a [2020-08-18 23:39:18,720 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:39:18,722 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:39:18,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:39:18,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:39:18,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:39:18,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:39:18" (1/1) ... [2020-08-18 23:39:18,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a565f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18, skipping insertion in model container [2020-08-18 23:39:18,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:39:18" (1/1) ... [2020-08-18 23:39:18,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:39:18,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:39:18,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:39:18,928 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:39:18,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:39:18,959 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:39:18,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18 WrapperNode [2020-08-18 23:39:18,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:39:18,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:39:18,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:39:18,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:39:18,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18" (1/1) ... [2020-08-18 23:39:18,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18" (1/1) ... [2020-08-18 23:39:18,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18" (1/1) ... [2020-08-18 23:39:18,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18" (1/1) ... [2020-08-18 23:39:19,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18" (1/1) ... [2020-08-18 23:39:19,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18" (1/1) ... [2020-08-18 23:39:19,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18" (1/1) ... [2020-08-18 23:39:19,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:39:19,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:39:19,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:39:19,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:39:19,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:39:19,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:39:19,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:39:19,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 23:39:19,134 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-08-18 23:39:19,134 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:39:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:39:19,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 23:39:19,135 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-08-18 23:39:19,135 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:39:19,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:39:19,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:39:19,294 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:39:19,294 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 23:39:19,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:39:19 BoogieIcfgContainer [2020-08-18 23:39:19,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:39:19,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:39:19,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:39:19,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:39:19,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:39:18" (1/3) ... [2020-08-18 23:39:19,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751e17f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:39:19, skipping insertion in model container [2020-08-18 23:39:19,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:39:18" (2/3) ... [2020-08-18 23:39:19,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@751e17f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:39:19, skipping insertion in model container [2020-08-18 23:39:19,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:39:19" (3/3) ... [2020-08-18 23:39:19,308 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_4.c [2020-08-18 23:39:19,320 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:39:19,328 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:39:19,345 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:39:19,396 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:39:19,397 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:39:19,397 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:39:19,398 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:39:19,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:39:19,398 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:39:19,398 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:39:19,399 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:39:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-18 23:39:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 23:39:19,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:19,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:19,438 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:19,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:19,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1783967560, now seen corresponding path program 1 times [2020-08-18 23:39:19,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:19,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456509428] [2020-08-18 23:39:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:19,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:39:19,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456509428] [2020-08-18 23:39:19,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:19,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:39:19,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466257792] [2020-08-18 23:39:19,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:39:19,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:19,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:39:19,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:39:19,677 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-08-18 23:39:19,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:19,736 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2020-08-18 23:39:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:39:19,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-18 23:39:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:19,748 INFO L225 Difference]: With dead ends: 37 [2020-08-18 23:39:19,749 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 23:39:19,752 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 [2020-08-18 23:39:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 23:39:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-08-18 23:39:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-18 23:39:19,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-18 23:39:19,797 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2020-08-18 23:39:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:19,798 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-18 23:39:19,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:39:19,798 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-18 23:39:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 23:39:19,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:19,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:39:19,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:39:19,800 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:19,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:19,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1698359207, now seen corresponding path program 1 times [2020-08-18 23:39:19,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:19,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391765550] [2020-08-18 23:39:19,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:39:19,825 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:39:19,826 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:39:19,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:39:19,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:39:19 BoogieIcfgContainer [2020-08-18 23:39:19,847 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:39:19,850 INFO L168 Benchmark]: Toolchain (without parser) took 1126.94 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 104.4 MB in the beginning and 149.2 MB in the end (delta: -44.8 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:19,851 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 122.4 MB in the beginning and 121.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-18 23:39:19,852 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.84 ms. Allocated memory is still 142.1 MB. Free memory was 104.0 MB in the beginning and 94.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:19,853 INFO L168 Benchmark]: Boogie Preprocessor took 106.47 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 94.4 MB in the beginning and 184.4 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:19,854 INFO L168 Benchmark]: RCFGBuilder took 231.57 ms. Allocated memory is still 205.5 MB. Free memory was 184.4 MB in the beginning and 173.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:19,855 INFO L168 Benchmark]: TraceAbstraction took 546.73 ms. Allocated memory is still 205.5 MB. Free memory was 172.8 MB in the beginning and 149.2 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:19,859 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 142.1 MB. Free memory was 122.4 MB in the beginning and 121.9 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 236.84 ms. Allocated memory is still 142.1 MB. Free memory was 104.0 MB in the beginning and 94.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.47 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 94.4 MB in the beginning and 184.4 MB in the end (delta: -90.1 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 231.57 ms. Allocated memory is still 205.5 MB. Free memory was 184.4 MB in the beginning and 173.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 546.73 ms. Allocated memory is still 205.5 MB. Free memory was 172.8 MB in the beginning and 149.2 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 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; [L24] COND TRUE 1 [L26] CALL eval() [L14] COND TRUE 1 [L15] x=1 [L26] RET eval() [L27] CALL __VERIFIER_assert(x==0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - 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: 0.0s, 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...