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/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:17:06,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:17:06,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:17:06,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:17:06,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:17:06,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:17:06,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:17:06,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:17:06,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:17:06,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:17:06,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:17:06,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:17:06,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:17:06,550 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:17:06,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:17:06,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:17:06,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:17:06,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:17:06,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:17:06,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:17:06,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:17:06,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:17:06,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:17:06,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:17:06,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:17:06,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:17:06,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:17:06,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:17:06,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:17:06,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:17:06,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:17:06,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:17:06,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:17:06,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:17:06,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:17:06,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:17:06,581 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 [2019-10-13 19:17:06,606 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:17:06,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:17:06,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:17:06,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:17:06,608 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:17:06,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:17:06,609 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:17:06,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:17:06,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:17:06,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:17:06,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:17:06,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:17:06,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:17:06,611 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:17:06,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:17:06,611 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:17:06,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:17:06,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:17:06,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:17:06,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:17:06,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:17:06,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:17:06,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:17:06,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:17:06,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:17:06,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:17:06,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:17:06,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:17:06,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:17:06,929 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:17:06,943 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:17:06,948 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:17:06,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:17:06,949 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:17:06,950 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-13 19:17:07,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ce2aad37/9c82335c4e4642d4a85caba4c42dc765/FLAGcb059a541 [2019-10-13 19:17:07,432 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:17:07,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-13 19:17:07,440 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ce2aad37/9c82335c4e4642d4a85caba4c42dc765/FLAGcb059a541 [2019-10-13 19:17:07,785 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ce2aad37/9c82335c4e4642d4a85caba4c42dc765 [2019-10-13 19:17:07,794 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:17:07,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:17:07,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:07,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:17:07,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:17:07,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:07" (1/1) ... [2019-10-13 19:17:07,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc525ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:07, skipping insertion in model container [2019-10-13 19:17:07,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:17:07" (1/1) ... [2019-10-13 19:17:07,814 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:17:07,833 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:17:08,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:08,039 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:17:08,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:17:08,071 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:17:08,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08 WrapperNode [2019-10-13 19:17:08,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:17:08,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:17:08,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:17:08,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:17:08,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08" (1/1) ... [2019-10-13 19:17:08,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08" (1/1) ... [2019-10-13 19:17:08,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08" (1/1) ... [2019-10-13 19:17:08,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08" (1/1) ... [2019-10-13 19:17:08,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08" (1/1) ... [2019-10-13 19:17:08,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08" (1/1) ... [2019-10-13 19:17:08,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08" (1/1) ... [2019-10-13 19:17:08,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:17:08,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:17:08,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:17:08,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:17:08,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08" (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 [2019-10-13 19:17:08,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:17:08,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:17:08,243 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:17:08,243 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:17:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:17:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:17:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:17:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:17:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:17:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:17:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:17:08,438 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:17:08,438 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 19:17:08,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:08 BoogieIcfgContainer [2019-10-13 19:17:08,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:17:08,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:17:08,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:17:08,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:17:08,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:17:07" (1/3) ... [2019-10-13 19:17:08,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b8213e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:08, skipping insertion in model container [2019-10-13 19:17:08,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:17:08" (2/3) ... [2019-10-13 19:17:08,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b8213e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:17:08, skipping insertion in model container [2019-10-13 19:17:08,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:17:08" (3/3) ... [2019-10-13 19:17:08,448 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-10-13 19:17:08,459 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:17:08,467 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:17:08,494 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:17:08,528 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:17:08,528 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:17:08,528 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:17:08,529 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:17:08,529 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:17:08,530 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:17:08,530 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:17:08,530 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:17:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-13 19:17:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 19:17:08,586 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:08,587 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:08,589 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:08,600 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2019-10-13 19:17:08,611 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:08,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476998976] [2019-10-13 19:17:08,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:08,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:08,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:08,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476998976] [2019-10-13 19:17:08,888 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:08,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 19:17:08,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669511491] [2019-10-13 19:17:08,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:17:08,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:08,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:17:08,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:17:08,910 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2019-10-13 19:17:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:09,063 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-10-13 19:17:09,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:17:09,066 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-13 19:17:09,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:09,077 INFO L225 Difference]: With dead ends: 50 [2019-10-13 19:17:09,077 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 19:17:09,081 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:17:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 19:17:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-13 19:17:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 19:17:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-13 19:17:09,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2019-10-13 19:17:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:09,131 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-13 19:17:09,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:17:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-13 19:17:09,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:17:09,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:09,133 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:09,133 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2019-10-13 19:17:09,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:09,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123635377] [2019-10-13 19:17:09,136 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:09,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:09,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:09,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123635377] [2019-10-13 19:17:09,402 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:17:09,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 19:17:09,402 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827900320] [2019-10-13 19:17:09,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:17:09,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:17:09,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:17:09,410 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-10-13 19:17:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:09,550 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-13 19:17:09,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:17:09,552 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-10-13 19:17:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:09,554 INFO L225 Difference]: With dead ends: 32 [2019-10-13 19:17:09,555 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 19:17:09,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:17:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 19:17:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-13 19:17:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 19:17:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-13 19:17:09,571 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2019-10-13 19:17:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:09,572 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-13 19:17:09,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:17:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-13 19:17:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 19:17:09,574 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:09,575 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:09,575 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:09,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1415691032, now seen corresponding path program 1 times [2019-10-13 19:17:09,577 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:09,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640724486] [2019-10-13 19:17:09,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:09,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:09,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 19:17:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 19:17:09,670 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-13 19:17:09,672 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 19:17:09,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:17:09 BoogieIcfgContainer [2019-10-13 19:17:09,712 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:17:09,716 INFO L168 Benchmark]: Toolchain (without parser) took 1918.37 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 103.0 MB in the beginning and 98.2 MB in the end (delta: 4.7 MB). Peak memory consumption was 66.1 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:09,718 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 19:17:09,719 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.27 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:09,721 INFO L168 Benchmark]: Boogie Preprocessor took 113.61 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 93.3 MB in the beginning and 178.1 MB in the end (delta: -84.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:09,722 INFO L168 Benchmark]: RCFGBuilder took 252.98 ms. Allocated memory is still 199.8 MB. Free memory was 178.1 MB in the beginning and 166.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:09,724 INFO L168 Benchmark]: TraceAbstraction took 1270.50 ms. Allocated memory is still 199.8 MB. Free memory was 166.2 MB in the beginning and 98.2 MB in the end (delta: 68.0 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. [2019-10-13 19:17:09,737 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.27 ms. Allocated memory is still 138.4 MB. Free memory was 102.8 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.61 ms. Allocated memory was 138.4 MB in the beginning and 199.8 MB in the end (delta: 61.3 MB). Free memory was 93.3 MB in the beginning and 178.1 MB in the end (delta: -84.8 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 252.98 ms. Allocated memory is still 199.8 MB. Free memory was 178.1 MB in the beginning and 166.2 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1270.50 ms. Allocated memory is still 199.8 MB. Free memory was 166.2 MB in the beginning and 98.2 MB in the end (delta: 68.0 MB). Peak memory consumption was 68.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i