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/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:08:49,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:08:49,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:08:49,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:08:49,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:08:49,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:08:49,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:08:49,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:08:49,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:08:49,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:08:49,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:08:49,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:08:49,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:08:49,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:08:49,125 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:08:49,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:08:49,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:08:49,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:08:49,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:08:49,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:08:49,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:08:49,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:08:49,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:08:49,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:08:49,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:08:49,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:08:49,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:08:49,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:08:49,157 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 [2019-10-14 23:08:49,174 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:08:49,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:08:49,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:08:49,175 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:08:49,176 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:08:49,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:08:49,182 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:08:49,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:08:49,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:08:49,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:08:49,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:08:49,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:08:49,183 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:08:49,184 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:08:49,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:08:49,184 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:08:49,184 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:08:49,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:08:49,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:08:49,185 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:08:49,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:08:49,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:08:49,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:08:49,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:08:49,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:08:49,186 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:08:49,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:08:49,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:08:49,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:08:49,449 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:08:49,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:08:49,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:08:49,466 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:08:49,466 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:08:49,466 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-10-14 23:08:49,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbc092ca/a8492ed0c5364b05b3b6a5323667616c/FLAGd979b7ca1 [2019-10-14 23:08:50,011 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:08:50,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-10-14 23:08:50,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbc092ca/a8492ed0c5364b05b3b6a5323667616c/FLAGd979b7ca1 [2019-10-14 23:08:50,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbc092ca/a8492ed0c5364b05b3b6a5323667616c [2019-10-14 23:08:50,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:08:50,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:08:50,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:08:50,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:08:50,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:08:50,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:08:50" (1/1) ... [2019-10-14 23:08:50,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fa9aec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50, skipping insertion in model container [2019-10-14 23:08:50,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:08:50" (1/1) ... [2019-10-14 23:08:50,441 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:08:50,458 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:08:50,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:08:50,669 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:08:50,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:08:50,708 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:08:50,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50 WrapperNode [2019-10-14 23:08:50,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:08:50,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:08:50,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:08:50,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:08:50,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50" (1/1) ... [2019-10-14 23:08:50,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50" (1/1) ... [2019-10-14 23:08:50,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50" (1/1) ... [2019-10-14 23:08:50,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50" (1/1) ... [2019-10-14 23:08:50,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50" (1/1) ... [2019-10-14 23:08:50,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50" (1/1) ... [2019-10-14 23:08:50,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50" (1/1) ... [2019-10-14 23:08:50,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:08:50,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:08:50,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:08:50,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:08:50,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50" (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 [2019-10-14 23:08:50,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:08:50,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:08:50,930 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2019-10-14 23:08:50,930 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2019-10-14 23:08:50,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:08:50,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:08:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2019-10-14 23:08:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2019-10-14 23:08:50,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:08:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:08:50,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:08:51,086 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:08:51,086 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:08:51,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:08:51 BoogieIcfgContainer [2019-10-14 23:08:51,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:08:51,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:08:51,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:08:51,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:08:51,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:08:50" (1/3) ... [2019-10-14 23:08:51,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696b9b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:08:51, skipping insertion in model container [2019-10-14 23:08:51,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:08:50" (2/3) ... [2019-10-14 23:08:51,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696b9b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:08:51, skipping insertion in model container [2019-10-14 23:08:51,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:08:51" (3/3) ... [2019-10-14 23:08:51,096 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-10-14 23:08:51,105 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:08:51,113 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:08:51,125 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:08:51,151 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:08:51,151 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:08:51,151 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:08:51,151 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:08:51,152 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:08:51,152 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:08:51,152 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:08:51,152 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:08:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:08:51,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:08:51,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:08:51,179 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:08:51,181 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:08:51,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:08:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2019-10-14 23:08:51,196 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:08:51,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660722218] [2019-10-14 23:08:51,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:51,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:51,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:08:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:08:51,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660722218] [2019-10-14 23:08:51,433 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:08:51,433 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:08:51,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128717303] [2019-10-14 23:08:51,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:08:51,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:08:51,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:08:51,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:08:51,460 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2019-10-14 23:08:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:08:51,580 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2019-10-14 23:08:51,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:08:51,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-14 23:08:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:08:51,590 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:08:51,590 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:08:51,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:08:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:08:51,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-10-14 23:08:51,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:08:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-14 23:08:51,633 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2019-10-14 23:08:51,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:08:51,634 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-14 23:08:51,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:08:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-14 23:08:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:08:51,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:08:51,636 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:08:51,636 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:08:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:08:51,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2019-10-14 23:08:51,637 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:08:51,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411023927] [2019-10-14 23:08:51,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:51,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:51,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:08:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:08:51,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411023927] [2019-10-14 23:08:51,758 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175562700] [2019-10-14 23:08:51,758 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 [2019-10-14 23:08:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:08:51,804 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:08:51,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:08:51,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:08:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:08:51,879 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:08:51,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-10-14 23:08:51,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019959910] [2019-10-14 23:08:51,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:08:51,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:08:51,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:08:51,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:08:51,882 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2019-10-14 23:08:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:08:51,975 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-14 23:08:51,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:08:51,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-10-14 23:08:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:08:51,977 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:08:51,977 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:08:51,979 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:08:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:08:51,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-14 23:08:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:08:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-14 23:08:51,987 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2019-10-14 23:08:51,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:08:51,987 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-14 23:08:51,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:08:51,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-14 23:08:51,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:08:51,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:08:51,989 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:08:52,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:08:52,202 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:08:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:08:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2019-10-14 23:08:52,203 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:08:52,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707044687] [2019-10-14 23:08:52,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:52,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:08:52,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:08:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:08:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:08:52,257 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-14 23:08:52,258 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-14 23:08:52,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:08:52 BoogieIcfgContainer [2019-10-14 23:08:52,286 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:08:52,289 INFO L168 Benchmark]: Toolchain (without parser) took 1867.47 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 102.6 MB in the beginning and 116.8 MB in the end (delta: -14.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:08:52,290 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:08:52,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.35 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:08:52,294 INFO L168 Benchmark]: Boogie Preprocessor took 150.18 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 93.2 MB in the beginning and 181.8 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:08:52,295 INFO L168 Benchmark]: RCFGBuilder took 227.09 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 170.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-10-14 23:08:52,296 INFO L168 Benchmark]: TraceAbstraction took 1197.75 ms. Allocated memory is still 203.4 MB. Free memory was 170.9 MB in the beginning and 116.8 MB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2019-10-14 23:08:52,304 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 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.35 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 93.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.18 ms. Allocated memory was 137.9 MB in the beginning and 203.4 MB in the end (delta: 65.5 MB). Free memory was 93.2 MB in the beginning and 181.8 MB in the end (delta: -88.7 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 227.09 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 170.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1197.75 ms. Allocated memory is still 203.4 MB. Free memory was 170.9 MB in the beginning and 116.8 MB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 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: [L23] int i=0; VAL [i=0] [L24] COND TRUE i<5 [L25] i++ VAL [i=1] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=1] [L24] COND TRUE i<5 [L25] i++ VAL [i=2] [L29] CALL check_error(i!=3) VAL [\old(b)=1] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L29] RET check_error(i!=3) VAL [i=2] [L24] COND TRUE i<5 [L25] i++ VAL [i=3] [L29] CALL check_error(i!=3) VAL [\old(b)=0] [L18] (b) ? (0) : __blast_assert () VAL [\old(b)=0, b=0] [L18] CALL __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.1s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 12 SDslu, 129 SDs, 0 SdLazy, 59 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=2, 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1128 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...