/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:37,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:37,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:37,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:37,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:37,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:37,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:37,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:37,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:37,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:37,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:37,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:37,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:37,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:37,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:37,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:37,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:37,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:37,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:38,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:38,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:38,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:38,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:38,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:38,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:38,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:38,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:38,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:38,027 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 [2020-07-21 10:40:38,063 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:38,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:38,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:38,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:38,069 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:38,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:38,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:38,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:38,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:38,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:38,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:38,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:38,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:38,070 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:38,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:38,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:38,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:38,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:38,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:38,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:38,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:38,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:38,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:38,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:38,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:38,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:38,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:38,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:38,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:38,079 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 10:40:38,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:38,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:38,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:38,378 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:38,382 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:38,383 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-07-21 10:40:38,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/803e0c42d/63f87f208ead4a3e880f5b84835e7d28/FLAG4b8804ef2 [2020-07-21 10:40:38,929 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:38,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-07-21 10:40:38,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/803e0c42d/63f87f208ead4a3e880f5b84835e7d28/FLAG4b8804ef2 [2020-07-21 10:40:39,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/803e0c42d/63f87f208ead4a3e880f5b84835e7d28 [2020-07-21 10:40:39,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:39,300 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:39,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:39,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:39,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:39,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:39" (1/1) ... [2020-07-21 10:40:39,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4f958d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39, skipping insertion in model container [2020-07-21 10:40:39,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:39" (1/1) ... [2020-07-21 10:40:39,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:39,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:39,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:39,559 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:39,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:39,587 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:39,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39 WrapperNode [2020-07-21 10:40:39,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:39,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:39,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:39,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:39,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39" (1/1) ... [2020-07-21 10:40:39,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39" (1/1) ... [2020-07-21 10:40:39,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39" (1/1) ... [2020-07-21 10:40:39,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39" (1/1) ... [2020-07-21 10:40:39,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39" (1/1) ... [2020-07-21 10:40:39,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39" (1/1) ... [2020-07-21 10:40:39,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39" (1/1) ... [2020-07-21 10:40:39,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:39,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:39,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:39,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:39,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39" (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 [2020-07-21 10:40:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-07-21 10:40:39,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:39,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:40:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-07-21 10:40:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:39,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:39,924 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:39,925 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:40:39,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:39 BoogieIcfgContainer [2020-07-21 10:40:39,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:39,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:39,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:39,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:39,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:39" (1/3) ... [2020-07-21 10:40:39,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5cf78d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:39, skipping insertion in model container [2020-07-21 10:40:39,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:39" (2/3) ... [2020-07-21 10:40:39,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5cf78d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:39, skipping insertion in model container [2020-07-21 10:40:39,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:39" (3/3) ... [2020-07-21 10:40:39,947 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-07-21 10:40:39,968 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:39,980 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:40,003 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:40,033 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:40,033 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:40,034 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:40,034 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:40,034 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:40,034 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:40,034 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:40,035 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 10:40:40,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 10:40:40,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:40,065 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:40,065 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:40,072 INFO L82 PathProgramCache]: Analyzing trace with hash -284235614, now seen corresponding path program 1 times [2020-07-21 10:40:40,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:40,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230589830] [2020-07-21 10:40:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:40,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 10:40:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:40:40,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 10:40:40,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230589830] [2020-07-21 10:40:40,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:40,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 10:40:40,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018720426] [2020-07-21 10:40:40,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 10:40:40,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:40,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 10:40:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:40,359 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-07-21 10:40:40,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:40,518 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-07-21 10:40:40,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:40,521 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-21 10:40:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:40,545 INFO L225 Difference]: With dead ends: 45 [2020-07-21 10:40:40,546 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 10:40:40,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 10:40:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 10:40:40,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 10:40:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:40:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-21 10:40:40,618 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-07-21 10:40:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:40,619 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-21 10:40:40,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 10:40:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-21 10:40:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-21 10:40:40,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:40,622 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:40,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:40,836 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:40,837 INFO L82 PathProgramCache]: Analyzing trace with hash -920468714, now seen corresponding path program 1 times [2020-07-21 10:40:40,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:40,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462052052] [2020-07-21 10:40:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:40,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 10:40:40,902 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 10:40:40,927 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 10:40:40,927 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 10:40:41,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:41,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 10:40:41 BoogieIcfgContainer [2020-07-21 10:40:41,183 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 10:40:41,186 INFO L168 Benchmark]: Toolchain (without parser) took 1886.96 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.1 MB in the beginning and 120.1 MB in the end (delta: -17.0 MB). Peak memory consumption was 47.0 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:41,187 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 10:40:41,188 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.24 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:41,189 INFO L168 Benchmark]: Boogie Preprocessor took 24.83 ms. Allocated memory is still 139.5 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:41,190 INFO L168 Benchmark]: RCFGBuilder took 315.50 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 172.0 MB in the end (delta: -80.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:41,191 INFO L168 Benchmark]: TraceAbstraction took 1252.98 ms. Allocated memory is still 203.4 MB. Free memory was 171.4 MB in the beginning and 120.1 MB in the end (delta: 51.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-07-21 10:40:41,195 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 139.5 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 287.24 ms. Allocated memory is still 139.5 MB. Free memory was 102.6 MB in the beginning and 93.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.83 ms. Allocated memory is still 139.5 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.50 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 172.0 MB in the end (delta: -80.1 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1252.98 ms. Allocated memory is still 203.4 MB. Free memory was 171.4 MB in the beginning and 120.1 MB in the end (delta: 51.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int g; VAL [\old(g)=1, g=0] [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; VAL [\old(g)=0, g=-1, g=0, h=0] [L28] CALL A(g,h) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, g=0] [L17] COND TRUE \read(a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, a1=-1, a2=0, g=0] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=-1, \old(g)=0, g=0] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=-1, \old(g)=0, a1=0, a2=-1, g=-1] [L18] RET A(a2,a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=0, A(a2,a1)=0, a1=-1, a2=0, g=-1] [L28] RET A(g,h) VAL [\old(g)=0, A(g,h)=0, g=-1, g=-1, h=0] [L29] CALL A(g,h) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, g=-1] [L17] COND TRUE \read(a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, a1=-1, a2=0, g=-1] [L18] CALL A(a2,a1) VAL [\old(a1)=0, \old(a2)=-1, \old(g)=-1, g=-1] [L17] COND FALSE !(\read(a1)) [L20] g = a2 VAL [\old(a1)=0, \old(a2)=-1, \old(g)=-1, a1=0, a2=-1, g=-1] [L18] RET A(a2,a1) VAL [\old(a1)=-1, \old(a2)=0, \old(g)=-1, A(a2,a1)=0, a1=-1, a2=0, g=-1] [L29] RET A(g,h) VAL [\old(g)=0, A(g,h)=0, g=-1, g=-1, h=0] [L30] COND TRUE \read(g) VAL [\old(g)=0, g=-1, g=-1, h=0] [L31] __VERIFIER_error() VAL [\old(g)=0, g=-1, g=-1, h=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 8 SDslu, 56 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1349 SizeOfPredicates, 2 NumberOfNonLiveVariables, 66 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 2 InterpolantComputations, 0 PerfectInterpolantSequences, 2/8 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...