/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 11:44:17,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 11:44:17,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 11:44:17,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 11:44:17,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 11:44:17,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 11:44:17,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 11:44:17,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 11:44:17,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 11:44:17,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 11:44:17,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 11:44:17,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 11:44:17,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 11:44:17,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 11:44:17,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 11:44:17,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 11:44:17,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 11:44:17,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 11:44:17,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 11:44:17,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 11:44:17,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 11:44:17,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 11:44:17,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 11:44:17,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 11:44:17,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 11:44:17,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 11:44:17,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 11:44:17,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 11:44:17,398 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 [2020-07-17 11:44:17,419 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 11:44:17,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 11:44:17,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 11:44:17,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 11:44:17,421 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 11:44:17,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 11:44:17,422 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 11:44:17,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 11:44:17,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 11:44:17,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 11:44:17,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 11:44:17,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 11:44:17,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 11:44:17,424 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 11:44:17,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 11:44:17,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 11:44:17,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 11:44:17,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 11:44:17,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 11:44:17,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 11:44:17,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 11:44:17,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 11:44:17,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 11:44:17,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 11:44:17,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 11:44:17,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 11:44:17,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 11:44:17,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 11:44:17,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 11:44:17,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 11:44:17,701 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 11:44:17,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 11:44:17,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 11:44:17,716 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 11:44:17,716 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 11:44:17,717 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-07-17 11:44:17,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf889ee6d/6f7d93f8f7524af88c974e062f184bc2/FLAG3feb9c222 [2020-07-17 11:44:18,279 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 11:44:18,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-07-17 11:44:18,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf889ee6d/6f7d93f8f7524af88c974e062f184bc2/FLAG3feb9c222 [2020-07-17 11:44:18,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf889ee6d/6f7d93f8f7524af88c974e062f184bc2 [2020-07-17 11:44:18,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 11:44:18,663 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 11:44:18,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:18,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 11:44:18,669 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 11:44:18,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:18" (1/1) ... [2020-07-17 11:44:18,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f67d83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18, skipping insertion in model container [2020-07-17 11:44:18,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 11:44:18" (1/1) ... [2020-07-17 11:44:18,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 11:44:18,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 11:44:18,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:18,869 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 11:44:18,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 11:44:18,898 INFO L208 MainTranslator]: Completed translation [2020-07-17 11:44:18,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18 WrapperNode [2020-07-17 11:44:18,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 11:44:18,899 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 11:44:18,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 11:44:18,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 11:44:18,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18" (1/1) ... [2020-07-17 11:44:18,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18" (1/1) ... [2020-07-17 11:44:18,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18" (1/1) ... [2020-07-17 11:44:18,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18" (1/1) ... [2020-07-17 11:44:18,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18" (1/1) ... [2020-07-17 11:44:18,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18" (1/1) ... [2020-07-17 11:44:18,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18" (1/1) ... [2020-07-17 11:44:18,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 11:44:18,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 11:44:18,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 11:44:18,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 11:44:18,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18" (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 [2020-07-17 11:44:19,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 11:44:19,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 11:44:19,097 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-07-17 11:44:19,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 11:44:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 11:44:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 11:44:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-07-17 11:44:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 11:44:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 11:44:19,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 11:44:19,277 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 11:44:19,278 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 11:44:19,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:19 BoogieIcfgContainer [2020-07-17 11:44:19,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 11:44:19,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 11:44:19,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 11:44:19,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 11:44:19,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 11:44:18" (1/3) ... [2020-07-17 11:44:19,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0b14ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:19, skipping insertion in model container [2020-07-17 11:44:19,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 11:44:18" (2/3) ... [2020-07-17 11:44:19,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e0b14ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 11:44:19, skipping insertion in model container [2020-07-17 11:44:19,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 11:44:19" (3/3) ... [2020-07-17 11:44:19,291 INFO L109 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-07-17 11:44:19,303 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 11:44:19,314 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 11:44:19,331 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 11:44:19,361 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 11:44:19,362 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 11:44:19,362 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 11:44:19,362 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 11:44:19,363 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 11:44:19,363 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 11:44:19,363 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 11:44:19,364 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 11:44:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-17 11:44:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 11:44:19,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:19,403 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 11:44:19,404 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:19,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:19,412 INFO L82 PathProgramCache]: Analyzing trace with hash -284235614, now seen corresponding path program 1 times [2020-07-17 11:44:19,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:19,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122553128] [2020-07-17 11:44:19,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:44:19,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122553128] [2020-07-17 11:44:19,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144898903] [2020-07-17 11:44:19,682 INFO L94 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 -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 [2020-07-17 11:44:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 11:44:19,732 INFO L264 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-17 11:44:19,738 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 11:44:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 11:44:19,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 11:44:19,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2020-07-17 11:44:19,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847094360] [2020-07-17 11:44:19,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 11:44:19,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 11:44:19,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 11:44:19,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 11:44:19,793 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2020-07-17 11:44:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 11:44:19,969 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-07-17 11:44:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 11:44:19,971 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-17 11:44:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 11:44:19,984 INFO L225 Difference]: With dead ends: 45 [2020-07-17 11:44:19,984 INFO L226 Difference]: Without dead ends: 21 [2020-07-17 11:44:19,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-07-17 11:44:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-17 11:44:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-17 11:44:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 11:44:20,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-17 11:44:20,043 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-07-17 11:44:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 11:44:20,044 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-17 11:44:20,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 11:44:20,044 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-17 11:44:20,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-17 11:44:20,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 11:44:20,047 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] [2020-07-17 11:44:20,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-07-17 11:44:20,261 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 11:44:20,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 11:44:20,262 INFO L82 PathProgramCache]: Analyzing trace with hash -920468714, now seen corresponding path program 1 times [2020-07-17 11:44:20,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 11:44:20,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445463913] [2020-07-17 11:44:20,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 11:44:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 11:44:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 11:44:20,373 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 11:44:20,374 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 11:44:20,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 11:44:20,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 11:44:20 BoogieIcfgContainer [2020-07-17 11:44:20,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 11:44:20,411 INFO L168 Benchmark]: Toolchain (without parser) took 1748.72 ms. Allocated memory was 145.2 MB in the beginning and 203.9 MB in the end (delta: 58.7 MB). Free memory was 104.5 MB in the beginning and 121.2 MB in the end (delta: -16.7 MB). Peak memory consumption was 42.0 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:20,413 INFO L168 Benchmark]: CDTParser took 0.49 ms. Allocated memory is still 145.2 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-17 11:44:20,414 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.17 ms. Allocated memory is still 145.2 MB. Free memory was 104.0 MB in the beginning and 94.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:20,414 INFO L168 Benchmark]: Boogie Preprocessor took 30.00 ms. Allocated memory is still 145.2 MB. Free memory was 94.9 MB in the beginning and 93.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:20,415 INFO L168 Benchmark]: RCFGBuilder took 352.50 ms. Allocated memory was 145.2 MB in the beginning and 203.9 MB in the end (delta: 58.7 MB). Free memory was 93.4 MB in the beginning and 171.9 MB in the end (delta: -78.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:20,416 INFO L168 Benchmark]: TraceAbstraction took 1125.26 ms. Allocated memory is still 203.9 MB. Free memory was 171.2 MB in the beginning and 121.2 MB in the end (delta: 50.0 MB). Peak memory consumption was 50.0 MB. Max. memory is 7.1 GB. [2020-07-17 11:44:20,420 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49 ms. Allocated memory is still 145.2 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.17 ms. Allocated memory is still 145.2 MB. Free memory was 104.0 MB in the beginning and 94.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.00 ms. Allocated memory is still 145.2 MB. Free memory was 94.9 MB in the beginning and 93.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 352.50 ms. Allocated memory was 145.2 MB in the beginning and 203.9 MB in the end (delta: 58.7 MB). Free memory was 93.4 MB in the beginning and 171.9 MB in the end (delta: -78.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1125.26 ms. Allocated memory is still 203.9 MB. Free memory was 171.2 MB in the beginning and 121.2 MB in the end (delta: 50.0 MB). Peak memory consumption was 50.0 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=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)=-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: 1.0s, 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, 0.0s 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, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1368 SizeOfPredicates, 1 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...