/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 BIGGEST_EQUIVALENCE_CLASS --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/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:29:08,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:29:08,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:29:08,542 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 05:29:08,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:29:08,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:29:08,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:29:08,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:29:08,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:29:08,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:29:08,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:29:08,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:29:08,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:29:08,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:29:08,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:29:08,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:29:08,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 05:29:08,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:29:08,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:29:08,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:29:08,578 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 05:29:08,598 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:29:08,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:29:08,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:29:08,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:29:08,599 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:29:08,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:29:08,600 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:29:08,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:29:08,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:29:08,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:29:08,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:29:08,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:29:08,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:29:08,601 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:29:08,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:29:08,602 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:29:08,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:29:08,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:29:08,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:29:08,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:29:08,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:29:08,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:29:08,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:29:08,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:29:08,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:29:08,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:29:08,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:29:08,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:29:08,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:29:08,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS 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 05:29:08,874 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:29:08,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:29:08,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:29:08,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:29:08,891 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:29:08,892 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-07-20 05:29:08,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd01f3451/4cd30059caa54e848dcff690ce43e8dc/FLAGdd744abd7 [2020-07-20 05:29:09,407 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:29:09,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-07-20 05:29:09,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd01f3451/4cd30059caa54e848dcff690ce43e8dc/FLAGdd744abd7 [2020-07-20 05:29:09,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd01f3451/4cd30059caa54e848dcff690ce43e8dc [2020-07-20 05:29:09,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:29:09,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:29:09,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:29:09,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:29:09,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:29:09,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:09" (1/1) ... [2020-07-20 05:29:09,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fa9ad60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:09, skipping insertion in model container [2020-07-20 05:29:09,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:09" (1/1) ... [2020-07-20 05:29:09,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:29:09,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:29:10,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:29:10,011 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:29:10,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:29:10,039 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:29:10,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10 WrapperNode [2020-07-20 05:29:10,039 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:29:10,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:29:10,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:29:10,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:29:10,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10" (1/1) ... [2020-07-20 05:29:10,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10" (1/1) ... [2020-07-20 05:29:10,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10" (1/1) ... [2020-07-20 05:29:10,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10" (1/1) ... [2020-07-20 05:29:10,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10" (1/1) ... [2020-07-20 05:29:10,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10" (1/1) ... [2020-07-20 05:29:10,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10" (1/1) ... [2020-07-20 05:29:10,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:29:10,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:29:10,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:29:10,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:29:10,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10" (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 05:29:10,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:29:10,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:29:10,205 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-07-20 05:29:10,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:29:10,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:29:10,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:29:10,206 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-07-20 05:29:10,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:29:10,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:29:10,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:29:10,379 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:29:10,380 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 05:29:10,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:10 BoogieIcfgContainer [2020-07-20 05:29:10,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:29:10,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:29:10,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:29:10,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:29:10,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:29:09" (1/3) ... [2020-07-20 05:29:10,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b33d394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:10, skipping insertion in model container [2020-07-20 05:29:10,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:10" (2/3) ... [2020-07-20 05:29:10,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b33d394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:10, skipping insertion in model container [2020-07-20 05:29:10,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:10" (3/3) ... [2020-07-20 05:29:10,392 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-07-20 05:29:10,404 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:29:10,412 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:29:10,436 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:29:10,462 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:29:10,462 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:29:10,462 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:29:10,462 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:29:10,463 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:29:10,463 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:29:10,463 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:29:10,463 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:29:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 05:29:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:29:10,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:10,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:10,494 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:10,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:10,500 INFO L82 PathProgramCache]: Analyzing trace with hash -284235614, now seen corresponding path program 1 times [2020-07-20 05:29:10,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:10,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890772672] [2020-07-20 05:29:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d0d0bb0 [2020-07-20 05:29:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 05:29:10,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890772672] [2020-07-20 05:29:10,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400296615] [2020-07-20 05:29:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6df36e4c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:10,819 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6df36e4c issued 2 check-sat command(s) [2020-07-20 05:29:10,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:10,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 05:29:10,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:10,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 05:29:10,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:10,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-07-20 05:29:10,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2396144] [2020-07-20 05:29:10,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:29:10,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:10,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:29:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:29:10,875 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-07-20 05:29:11,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:11,065 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-07-20 05:29:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:29:11,067 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 05:29:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:11,077 INFO L225 Difference]: With dead ends: 45 [2020-07-20 05:29:11,078 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 05:29:11,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:29:11,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 05:29:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 05:29:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 05:29:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-20 05:29:11,128 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-07-20 05:29:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:11,128 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-20 05:29:11,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:29:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-20 05:29:11,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 05:29:11,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:11,131 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] [2020-07-20 05:29:11,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-20 05:29:11,345 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash -920468714, now seen corresponding path program 1 times [2020-07-20 05:29:11,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:11,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221897527] [2020-07-20 05:29:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6d0d0bb0 [2020-07-20 05:29:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 05:29:11,372 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 05:29:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 05:29:11,395 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 05:29:11,421 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 05:29:11,422 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 05:29:11,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:29:11,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:29:11 BoogieIcfgContainer [2020-07-20 05:29:11,450 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:29:11,452 INFO L168 Benchmark]: Toolchain (without parser) took 1633.47 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 103.0 MB in the beginning and 119.8 MB in the end (delta: -16.8 MB). Peak memory consumption was 46.6 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:11,453 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 05:29:11,454 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.69 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:11,455 INFO L168 Benchmark]: Boogie Preprocessor took 23.11 ms. Allocated memory is still 138.9 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:11,456 INFO L168 Benchmark]: RCFGBuilder took 320.10 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 92.0 MB in the beginning and 170.6 MB in the end (delta: -78.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:11,457 INFO L168 Benchmark]: TraceAbstraction took 1064.77 ms. Allocated memory is still 202.4 MB. Free memory was 170.0 MB in the beginning and 119.8 MB in the end (delta: 50.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:11,462 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 219.69 ms. Allocated memory is still 138.9 MB. Free memory was 102.5 MB in the beginning and 93.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.11 ms. Allocated memory is still 138.9 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 320.10 ms. Allocated memory was 138.9 MB in the beginning and 202.4 MB in the end (delta: 63.4 MB). Free memory was 92.0 MB in the beginning and 170.6 MB in the end (delta: -78.6 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1064.77 ms. Allocated memory is still 202.4 MB. Free memory was 170.0 MB in the beginning and 119.8 MB in the end (delta: 50.2 MB). Peak memory consumption was 50.2 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)=4, g=0] [L26] int g = __VERIFIER_nondet_int(); [L27] int h = !g; VAL [\old(g)=0, g=0, g=1, 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)=-1, a1=1, a2=0, g=1] [L28] RET A(g,h) VAL [\old(g)=0, A(g,h)=2, 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)=-2, a1=1, a2=0, g=1] [L29] RET A(g,h) VAL [\old(g)=0, A(g,h)=3, 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: 0.9s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 10 SDslu, 54 SDs, 0 SdLazy, 44 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s 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, 72 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1368 SizeOfPredicates, 1 NumberOfNonLiveVariables, 45 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...