/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 11:27:48,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 11:27:48,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 11:27:48,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 11:27:48,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 11:27:48,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 11:27:48,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 11:27:48,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 11:27:48,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 11:27:48,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 11:27:48,095 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 11:27:48,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 11:27:48,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 11:27:48,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 11:27:48,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 11:27:48,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 11:27:48,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 11:27:48,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 11:27:48,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 11:27:48,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 11:27:48,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 11:27:48,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 11:27:48,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 11:27:48,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 11:27:48,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 11:27:48,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 11:27:48,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 11:27:48,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 11:27:48,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 11:27:48,194 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 11:27:48,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 11:27:48,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 11:27:48,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 11:27:48,196 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 11:27:48,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 11:27:48,197 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 11:27:48,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 11:27:48,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 11:27:48,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 11:27:48,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 11:27:48,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 11:27:48,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 11:27:48,198 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 11:27:48,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 11:27:48,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 11:27:48,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 11:27:48,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 11:27:48,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 11:27:48,199 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 11:27:48,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 11:27:48,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 11:27:48,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 11:27:48,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 11:27:48,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 11:27:48,201 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 11:27:48,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 11:27:48,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 11:27:48,201 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 11:27:48,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 11:27:48,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 11:27:48,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 11:27:48,548 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 11:27:48,550 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 11:27:48,550 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 11:27:48,551 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_1.c [2020-08-18 11:27:48,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef1902ebd/a5371e4799254d19940863a5d4b722c7/FLAGe4320498e [2020-08-18 11:27:49,110 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 11:27:49,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/while_infinite_loop_1.c [2020-08-18 11:27:49,117 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef1902ebd/a5371e4799254d19940863a5d4b722c7/FLAGe4320498e [2020-08-18 11:27:49,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef1902ebd/a5371e4799254d19940863a5d4b722c7 [2020-08-18 11:27:49,560 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 11:27:49,562 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 11:27:49,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 11:27:49,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 11:27:49,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 11:27:49,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3d6b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49, skipping insertion in model container [2020-08-18 11:27:49,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,581 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 11:27:49,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 11:27:49,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:27:49,779 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 11:27:49,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 11:27:49,808 INFO L208 MainTranslator]: Completed translation [2020-08-18 11:27:49,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49 WrapperNode [2020-08-18 11:27:49,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 11:27:49,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 11:27:49,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 11:27:49,810 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 11:27:49,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... [2020-08-18 11:27:49,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 11:27:49,917 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 11:27:49,917 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 11:27:49,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 11:27:49,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 11:27:49,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 11:27:49,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 11:27:49,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 11:27:49,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 11:27:49,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 11:27:49,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 11:27:49,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 11:27:49,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 11:27:49,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 11:27:50,129 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 11:27:50,129 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 11:27:50,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:27:50 BoogieIcfgContainer [2020-08-18 11:27:50,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 11:27:50,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 11:27:50,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 11:27:50,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 11:27:50,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:27:49" (1/3) ... [2020-08-18 11:27:50,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c44114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:27:50, skipping insertion in model container [2020-08-18 11:27:50,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:27:49" (2/3) ... [2020-08-18 11:27:50,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c44114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:27:50, skipping insertion in model container [2020-08-18 11:27:50,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:27:50" (3/3) ... [2020-08-18 11:27:50,140 INFO L109 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_1.c [2020-08-18 11:27:50,150 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 11:27:50,157 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 11:27:50,170 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 11:27:50,193 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 11:27:50,193 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 11:27:50,194 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 11:27:50,194 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 11:27:50,194 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 11:27:50,194 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 11:27:50,194 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 11:27:50,194 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 11:27:50,209 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-08-18 11:27:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 11:27:50,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:50,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:27:50,214 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:50,220 INFO L82 PathProgramCache]: Analyzing trace with hash -10313984, now seen corresponding path program 1 times [2020-08-18 11:27:50,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:50,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102934240] [2020-08-18 11:27:50,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:27:50,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102934240] [2020-08-18 11:27:50,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:50,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 11:27:50,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512996858] [2020-08-18 11:27:50,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 11:27:50,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:50,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 11:27:50,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 11:27:50,350 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-08-18 11:27:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:50,376 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2020-08-18 11:27:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 11:27:50,377 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 11:27:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:50,385 INFO L225 Difference]: With dead ends: 26 [2020-08-18 11:27:50,386 INFO L226 Difference]: Without dead ends: 13 [2020-08-18 11:27:50,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 11:27:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-18 11:27:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-18 11:27:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-18 11:27:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-08-18 11:27:50,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-08-18 11:27:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:50,427 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-08-18 11:27:50,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 11:27:50,427 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-08-18 11:27:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 11:27:50,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 11:27:50,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 11:27:50,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 11:27:50,429 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 11:27:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 11:27:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash -13144129, now seen corresponding path program 1 times [2020-08-18 11:27:50,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 11:27:50,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168356152] [2020-08-18 11:27:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 11:27:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 11:27:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 11:27:50,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 11:27:50,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168356152] [2020-08-18 11:27:50,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 11:27:50,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 11:27:50,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133567327] [2020-08-18 11:27:50,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 11:27:50,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 11:27:50,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 11:27:50,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 11:27:50,541 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2020-08-18 11:27:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 11:27:50,575 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-08-18 11:27:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 11:27:50,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-08-18 11:27:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 11:27:50,578 INFO L225 Difference]: With dead ends: 13 [2020-08-18 11:27:50,578 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 11:27:50,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 11:27:50,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 11:27:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 11:27:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 11:27:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 11:27:50,581 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2020-08-18 11:27:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 11:27:50,581 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 11:27:50,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 11:27:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 11:27:50,581 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 11:27:50,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 11:27:50,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 11:27:50,625 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 11:27:50,626 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 11:27:50,626 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 11:27:50,626 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 11:27:50,627 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 11:27:50,627 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 11:27:50,628 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2020-08-18 11:27:50,628 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2020-08-18 11:27:50,628 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (= main_~x~0 0) [2020-08-18 11:27:50,629 INFO L264 CegarLoopResult]: At program point L15-1(lines 13 16) the Hoare annotation is: (= main_~x~0 0) [2020-08-18 11:27:50,629 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2020-08-18 11:27:50,630 INFO L264 CegarLoopResult]: At program point L13-2(lines 13 16) the Hoare annotation is: false [2020-08-18 11:27:50,630 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-18 11:27:50,630 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-18 11:27:50,630 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-18 11:27:50,630 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-18 11:27:50,631 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-18 11:27:50,631 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-18 11:27:50,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:27:50 BoogieIcfgContainer [2020-08-18 11:27:50,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 11:27:50,657 INFO L168 Benchmark]: Toolchain (without parser) took 1092.20 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 106.1 MB in the beginning and 141.7 MB in the end (delta: -35.5 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:50,658 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 11:27:50,659 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.36 ms. Allocated memory is still 143.1 MB. Free memory was 105.7 MB in the beginning and 96.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:50,661 INFO L168 Benchmark]: Boogie Preprocessor took 106.36 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 96.2 MB in the beginning and 183.6 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:50,662 INFO L168 Benchmark]: RCFGBuilder took 215.95 ms. Allocated memory is still 205.0 MB. Free memory was 183.6 MB in the beginning and 173.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:50,663 INFO L168 Benchmark]: TraceAbstraction took 518.82 ms. Allocated memory is still 205.0 MB. Free memory was 173.6 MB in the beginning and 141.7 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. [2020-08-18 11:27:50,669 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 143.1 MB. Free memory was 124.7 MB in the beginning and 124.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.36 ms. Allocated memory is still 143.1 MB. Free memory was 105.7 MB in the beginning and 96.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.36 ms. Allocated memory was 143.1 MB in the beginning and 205.0 MB in the end (delta: 61.9 MB). Free memory was 96.2 MB in the beginning and 183.6 MB in the end (delta: -87.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 215.95 ms. Allocated memory is still 205.0 MB. Free memory was 183.6 MB in the beginning and 173.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 518.82 ms. Allocated memory is still 205.0 MB. Free memory was 173.6 MB in the beginning and 141.7 MB in the end (delta: 31.9 MB). Peak memory consumption was 31.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x == 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 5 SDslu, 19 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 10 PreInvPairs, 12 NumberOfFragments, 12 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 252 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...