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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/ldv-regression/test09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:01:31,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:01:31,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:01:31,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:01:31,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:01:31,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:01:31,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:01:31,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:01:31,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:01:31,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:01:31,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:01:31,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:01:31,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:01:31,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:01:31,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:01:31,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:01:31,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:01:31,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:01:31,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:01:31,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:01:31,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:01:31,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:01:31,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:01:31,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:01:31,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:01:31,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:01:31,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:01:31,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:01:31,443 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 [2019-10-15 01:01:31,477 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:01:31,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:01:31,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:01:31,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:01:31,482 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:01:31,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:01:31,482 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:01:31,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:01:31,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:01:31,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:01:31,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:01:31,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:01:31,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:01:31,486 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:01:31,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:01:31,486 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:01:31,487 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:01:31,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:01:31,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:01:31,487 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:01:31,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:01:31,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:01:31,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:01:31,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:01:31,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:01:31,488 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:01:31,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:01:31,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:01:31,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:01:31,789 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:01:31,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:01:31,817 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:01:31,818 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:01:31,819 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:01:31,819 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test09.c [2019-10-15 01:01:31,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d369dabdc/850ff085540343d6b0dceb9d1f296205/FLAG270115cd4 [2019-10-15 01:01:32,376 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:01:32,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test09.c [2019-10-15 01:01:32,383 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d369dabdc/850ff085540343d6b0dceb9d1f296205/FLAG270115cd4 [2019-10-15 01:01:32,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d369dabdc/850ff085540343d6b0dceb9d1f296205 [2019-10-15 01:01:32,777 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:01:32,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:01:32,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:01:32,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:01:32,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:01:32,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:01:32" (1/1) ... [2019-10-15 01:01:32,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef99201 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:32, skipping insertion in model container [2019-10-15 01:01:32,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:01:32" (1/1) ... [2019-10-15 01:01:32,796 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:01:32,819 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:01:32,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:01:33,008 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:01:33,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:01:33,037 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:01:33,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33 WrapperNode [2019-10-15 01:01:33,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:01:33,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:01:33,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:01:33,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:01:33,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33" (1/1) ... [2019-10-15 01:01:33,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33" (1/1) ... [2019-10-15 01:01:33,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33" (1/1) ... [2019-10-15 01:01:33,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33" (1/1) ... [2019-10-15 01:01:33,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33" (1/1) ... [2019-10-15 01:01:33,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33" (1/1) ... [2019-10-15 01:01:33,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33" (1/1) ... [2019-10-15 01:01:33,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:01:33,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:01:33,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:01:33,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:01:33,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33" (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 [2019-10-15 01:01:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:01:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:01:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-10-15 01:01:33,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:01:33,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:01:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-10-15 01:01:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:01:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:01:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:01:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:01:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:01:33,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 01:01:33,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:01:33,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:01:33,447 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:01:33,447 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-15 01:01:33,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:01:33 BoogieIcfgContainer [2019-10-15 01:01:33,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:01:33,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:01:33,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:01:33,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:01:33,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:01:32" (1/3) ... [2019-10-15 01:01:33,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de35fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:01:33, skipping insertion in model container [2019-10-15 01:01:33,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:01:33" (2/3) ... [2019-10-15 01:01:33,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de35fb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:01:33, skipping insertion in model container [2019-10-15 01:01:33,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:01:33" (3/3) ... [2019-10-15 01:01:33,478 INFO L109 eAbstractionObserver]: Analyzing ICFG test09.c [2019-10-15 01:01:33,492 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:01:33,504 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:01:33,538 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:01:33,569 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:01:33,570 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:01:33,570 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:01:33,570 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:01:33,570 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:01:33,570 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:01:33,570 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:01:33,570 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:01:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:01:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:01:33,590 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:01:33,590 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:01:33,592 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:01:33,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:01:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1889415219, now seen corresponding path program 1 times [2019-10-15 01:01:33,605 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:01:33,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246991044] [2019-10-15 01:01:33,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:33,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:33,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:01:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:01:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:01:33,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246991044] [2019-10-15 01:01:33,855 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:01:33,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:01:33,855 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981607153] [2019-10-15 01:01:33,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:01:33,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:01:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:01:33,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:01:33,886 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-10-15 01:01:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:01:33,979 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-15 01:01:33,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:01:33,981 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-15 01:01:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:01:33,993 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:01:33,994 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:01:33,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:01:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:01:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 01:01:34,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:01:34,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2019-10-15 01:01:34,047 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2019-10-15 01:01:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:01:34,048 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2019-10-15 01:01:34,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:01:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2019-10-15 01:01:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:01:34,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:01:34,052 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:01:34,053 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:01:34,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:01:34,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1918044370, now seen corresponding path program 1 times [2019-10-15 01:01:34,054 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:01:34,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608404305] [2019-10-15 01:01:34,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:34,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:01:34,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:01:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:01:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:01:34,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608404305] [2019-10-15 01:01:34,459 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:01:34,460 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:01:34,460 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349382151] [2019-10-15 01:01:34,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:01:34,462 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:01:34,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:01:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:01:34,463 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 7 states. [2019-10-15 01:01:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:01:34,633 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2019-10-15 01:01:34,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:01:34,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-15 01:01:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:01:34,634 INFO L225 Difference]: With dead ends: 15 [2019-10-15 01:01:34,635 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:01:34,636 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:01:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:01:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:01:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:01:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:01:34,637 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-10-15 01:01:34,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:01:34,638 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:01:34,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:01:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:01:34,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:01:34,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:01:34,841 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:01:34,842 INFO L439 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(~p1~0.offset)| ~p1~0.offset) (= |old(~p1~0.base)| ~p1~0.base)) [2019-10-15 01:01:34,843 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:01:34,843 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 14) no Hoare annotation was computed. [2019-10-15 01:01:34,843 INFO L443 ceAbstractionStarter]: For program point fEXIT(lines 7 15) no Hoare annotation was computed. [2019-10-15 01:01:34,843 INFO L439 ceAbstractionStarter]: At program point fENTRY(lines 7 15) the Hoare annotation is: (or (and (= |old(~p1~0.offset)| ~p1~0.offset) (= |~#a~0.base| ~p1~0.base)) (= |~#a~0.base| |~#b~0.base|) (not (= 1 (select (select |#memory_int| ~p2~0.base) ~p2~0.offset))) (not (= |~#a~0.offset| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |~#a~0.base|))) [2019-10-15 01:01:34,843 INFO L443 ceAbstractionStarter]: For program point fFINAL(lines 7 15) no Hoare annotation was computed. [2019-10-15 01:01:34,844 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:01:34,844 INFO L439 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (and (not (= |~#b~0.base| |~#a~0.base|)) (= ~p2~0.offset ~p1~0.offset) (= ~p2~0.base ~p1~0.base)) [2019-10-15 01:01:34,844 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:01:34,844 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:01:34,844 INFO L439 ceAbstractionStarter]: At program point L32(lines 17 39) the Hoare annotation is: (or (= |~#a~0.base| |~#b~0.base|) (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|))) [2019-10-15 01:01:34,844 INFO L443 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2019-10-15 01:01:34,845 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 17 39) the Hoare annotation is: (or (= |~#a~0.base| |~#b~0.base|) (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|)) (and (= |old(~p1~0.offset)| ~p1~0.offset) (= ~p2~0.offset ~p1~0.offset) (= |old(~p1~0.base)| ~p1~0.base) (= ~p2~0.base ~p1~0.base))) [2019-10-15 01:01:34,845 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 17 39) no Hoare annotation was computed. [2019-10-15 01:01:34,847 INFO L439 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (or (and (= 1 (select (select |#memory_int| ~p2~0.base) ~p2~0.offset)) (= ~p1~0.offset |~#a~0.offset|) (= |~#a~0.base| ~p1~0.base)) (= |~#a~0.base| |~#b~0.base|) (not (= |old(~p2~0.offset)| |old(~p1~0.offset)|)) (not (= |old(~p1~0.base)| |old(~p2~0.base)|))) [2019-10-15 01:01:34,848 INFO L443 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2019-10-15 01:01:34,848 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 17 39) no Hoare annotation was computed. [2019-10-15 01:01:34,848 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 37) no Hoare annotation was computed. [2019-10-15 01:01:34,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:01:34 BoogieIcfgContainer [2019-10-15 01:01:34,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:01:34,873 INFO L168 Benchmark]: Toolchain (without parser) took 2092.60 ms. Allocated memory was 138.4 MB in the beginning and 234.9 MB in the end (delta: 96.5 MB). Free memory was 102.6 MB in the beginning and 186.5 MB in the end (delta: -84.0 MB). Peak memory consumption was 84.0 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:34,875 INFO L168 Benchmark]: CDTParser took 1.10 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 01:01:34,876 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.69 ms. Allocated memory is still 138.4 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:34,879 INFO L168 Benchmark]: Boogie Preprocessor took 112.31 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 179.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:34,888 INFO L168 Benchmark]: RCFGBuilder took 300.00 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 165.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:34,891 INFO L168 Benchmark]: TraceAbstraction took 1416.76 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 165.4 MB in the beginning and 186.5 MB in the end (delta: -21.1 MB). Peak memory consumption was 84.0 MB. Max. memory is 7.1 GB. [2019-10-15 01:01:34,900 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.10 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.69 ms. Allocated memory is still 138.4 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.31 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.5 MB in the beginning and 179.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.00 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 165.4 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1416.76 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 165.4 MB in the beginning and 186.5 MB in the end (delta: -21.1 MB). Peak memory consumption was 84.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: 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: 17]: Loop Invariant Derived loop invariant: (a == b || !(\old(p2) == \old(p1))) || !(\old(p1) == \old(p2)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 23 SDtfs, 10 SDslu, 33 SDs, 0 SdLazy, 22 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 109 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 25 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 3939 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...