/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/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:19:24,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:19:24,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:19:24,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-07 11:19:24,428 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 [2020-07-07 11:19:24,443 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:19:24,443 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:19:24,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:19:24,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:19:24,444 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:19:24,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:19:24,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:19:24,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:19:24,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:19:24,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:19:24,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:19:24,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:19:24,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:19:24,446 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:19:24,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:19:24,447 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:19:24,447 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:19:24,447 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:19:24,447 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:19:24,448 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:19:24,448 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:19:24,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:19:24,448 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:19:24,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:19:24,449 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:19:24,449 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:19:24,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:19:24,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:19:24,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:19:24,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:19:24,744 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:19:24,763 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:19:24,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:19:24,768 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:19:24,768 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:19:24,769 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-07-07 11:19:24,850 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b8c5957/2173b102f34c4bc4ba075b7c019128c3/FLAGab861f84f [2020-07-07 11:19:25,287 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:19:25,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2020-07-07 11:19:25,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b8c5957/2173b102f34c4bc4ba075b7c019128c3/FLAGab861f84f [2020-07-07 11:19:25,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02b8c5957/2173b102f34c4bc4ba075b7c019128c3 [2020-07-07 11:19:25,672 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:19:25,673 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:19:25,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:19:25,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:19:25,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:19:25,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:19:25" (1/1) ... [2020-07-07 11:19:25,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f4a9cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25, skipping insertion in model container [2020-07-07 11:19:25,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:19:25" (1/1) ... [2020-07-07 11:19:25,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:19:25,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:19:25,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:19:25,860 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:19:25,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:19:25,888 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:19:25,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25 WrapperNode [2020-07-07 11:19:25,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:19:25,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:19:25,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:19:25,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:19:25,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25" (1/1) ... [2020-07-07 11:19:25,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25" (1/1) ... [2020-07-07 11:19:25,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25" (1/1) ... [2020-07-07 11:19:25,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25" (1/1) ... [2020-07-07 11:19:25,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25" (1/1) ... [2020-07-07 11:19:25,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25" (1/1) ... [2020-07-07 11:19:25,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25" (1/1) ... [2020-07-07 11:19:25,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:19:25,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:19:25,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:19:25,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:19:25,918 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25" (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 [2020-07-07 11:19:26,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:19:26,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:19:26,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2020-07-07 11:19:26,052 INFO L138 BoogieDeclarations]: Found implementation of procedure check_error [2020-07-07 11:19:26,052 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:19:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:19:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2020-07-07 11:19:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure check_error [2020-07-07 11:19:26,052 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:19:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:19:26,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:19:26,211 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:19:26,211 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 11:19:26,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:19:26 BoogieIcfgContainer [2020-07-07 11:19:26,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:19:26,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:19:26,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:19:26,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:19:26,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:19:25" (1/3) ... [2020-07-07 11:19:26,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c20b421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:19:26, skipping insertion in model container [2020-07-07 11:19:26,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:19:25" (2/3) ... [2020-07-07 11:19:26,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c20b421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:19:26, skipping insertion in model container [2020-07-07 11:19:26,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:19:26" (3/3) ... [2020-07-07 11:19:26,222 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2020-07-07 11:19:26,231 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:19:26,237 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:19:26,251 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:19:26,273 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:19:26,273 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:19:26,274 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:19:26,274 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:19:26,274 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:19:26,274 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:19:26,274 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:19:26,274 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:19:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-07 11:19:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-07 11:19:26,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:26,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:26,299 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:26,304 INFO L82 PathProgramCache]: Analyzing trace with hash 708560652, now seen corresponding path program 1 times [2020-07-07 11:19:26,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:26,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642969744] [2020-07-07 11:19:26,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:26,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642969744] [2020-07-07 11:19:26,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:19:26,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:19:26,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052879777] [2020-07-07 11:19:26,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:19:26,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:19:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:19:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:19:26,547 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states. [2020-07-07 11:19:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:19:26,646 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-07-07 11:19:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:19:26,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-07 11:19:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:19:26,656 INFO L225 Difference]: With dead ends: 42 [2020-07-07 11:19:26,657 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:19:26,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:19:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:19:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-07-07 11:19:26,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-07 11:19:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-07 11:19:26,699 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2020-07-07 11:19:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:19:26,699 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-07 11:19:26,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:19:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-07 11:19:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 11:19:26,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:26,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:26,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:19:26,702 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:26,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1910985178, now seen corresponding path program 1 times [2020-07-07 11:19:26,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:26,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035679755] [2020-07-07 11:19:26,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:26,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:26,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035679755] [2020-07-07 11:19:26,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462288586] [2020-07-07 11:19:26,801 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 [2020-07-07 11:19:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:19:26,831 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:19:26,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:19:26,876 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-07 11:19:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:19:26,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:19:26,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-07 11:19:26,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92982859] [2020-07-07 11:19:26,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:19:26,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:19:26,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:19:26,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:19:26,914 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2020-07-07 11:19:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:19:26,982 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-07-07 11:19:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:19:26,983 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-07-07 11:19:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:19:26,985 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:19:26,985 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:19:26,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:19:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:19:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-07-07 11:19:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-07 11:19:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-07-07 11:19:26,994 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 17 [2020-07-07 11:19:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:19:26,995 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-07-07 11:19:26,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:19:26,995 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-07-07 11:19:26,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-07 11:19:26,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:19:26,997 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:19:27,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:19:27,207 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:19:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:19:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1165555160, now seen corresponding path program 2 times [2020-07-07 11:19:27,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:19:27,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546275747] [2020-07-07 11:19:27,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:19:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:19:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:19:27,263 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:19:27,264 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:19:27,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 11:19:27,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:19:27 BoogieIcfgContainer [2020-07-07 11:19:27,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:19:27,291 INFO L168 Benchmark]: Toolchain (without parser) took 1616.79 ms. Allocated memory was 134.7 MB in the beginning and 198.2 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 110.7 MB in the end (delta: -11.0 MB). Peak memory consumption was 52.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:27,292 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-07 11:19:27,293 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.18 ms. Allocated memory is still 134.7 MB. Free memory was 99.3 MB in the beginning and 89.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:27,294 INFO L168 Benchmark]: Boogie Preprocessor took 26.85 ms. Allocated memory is still 134.7 MB. Free memory was 89.7 MB in the beginning and 88.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:27,295 INFO L168 Benchmark]: RCFGBuilder took 297.87 ms. Allocated memory was 134.7 MB in the beginning and 198.2 MB in the end (delta: 63.4 MB). Free memory was 88.3 MB in the beginning and 166.5 MB in the end (delta: -78.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:27,295 INFO L168 Benchmark]: TraceAbstraction took 1072.67 ms. Allocated memory is still 198.2 MB. Free memory was 165.8 MB in the beginning and 110.7 MB in the end (delta: 55.1 MB). Peak memory consumption was 55.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:19:27,299 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 134.7 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 215.18 ms. Allocated memory is still 134.7 MB. Free memory was 99.3 MB in the beginning and 89.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.85 ms. Allocated memory is still 134.7 MB. Free memory was 89.7 MB in the beginning and 88.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 297.87 ms. Allocated memory was 134.7 MB in the beginning and 198.2 MB in the end (delta: 63.4 MB). Free memory was 88.3 MB in the beginning and 166.5 MB in the end (delta: -78.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1072.67 ms. Allocated memory is still 198.2 MB. Free memory was 165.8 MB in the beginning and 110.7 MB in the end (delta: 55.1 MB). Peak memory consumption was 55.1 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. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 12 SDslu, 129 SDs, 0 SdLazy, 59 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s 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, 0.2s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1128 SizeOfPredicates, 2 NumberOfNonLiveVariables, 39 ConjunctsInSsa, 6 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, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...