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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-regression/test22-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 02:56:20,143 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 02:56:20,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 02:56:20,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 02:56:20,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 02:56:20,167 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 02:56:20,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 02:56:20,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 02:56:20,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 02:56:20,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 02:56:20,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 02:56:20,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 02:56:20,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 02:56:20,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 02:56:20,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 02:56:20,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 02:56:20,179 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 02:56:20,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 02:56:20,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 02:56:20,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 02:56:20,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 02:56:20,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 02:56:20,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 02:56:20,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 02:56:20,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 02:56:20,203 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 02:56:20,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 02:56:20,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 02:56:20,208 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 02:56:20,223 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 02:56:20,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 02:56:20,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 02:56:20,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 02:56:20,225 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 02:56:20,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 02:56:20,225 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 02:56:20,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 02:56:20,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 02:56:20,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 02:56:20,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 02:56:20,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 02:56:20,226 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 02:56:20,226 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 02:56:20,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 02:56:20,227 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 02:56:20,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 02:56:20,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 02:56:20,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 02:56:20,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 02:56:20,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 02:56:20,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 02:56:20,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 02:56:20,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 02:56:20,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 02:56:20,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 02:56:20,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 02:56:20,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 02:56:20,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 02:56:20,506 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 02:56:20,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 02:56:20,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 02:56:20,525 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 02:56:20,526 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 02:56:20,526 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-1.c [2019-10-15 02:56:20,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e49881dff/f9c0255d5a874a3290afd262ac1b17e4/FLAGce1b168c2 [2019-10-15 02:56:21,050 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 02:56:21,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-1.c [2019-10-15 02:56:21,059 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e49881dff/f9c0255d5a874a3290afd262ac1b17e4/FLAGce1b168c2 [2019-10-15 02:56:21,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e49881dff/f9c0255d5a874a3290afd262ac1b17e4 [2019-10-15 02:56:21,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 02:56:21,447 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 02:56:21,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 02:56:21,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 02:56:21,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 02:56:21,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f0f2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21, skipping insertion in model container [2019-10-15 02:56:21,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,466 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 02:56:21,482 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 02:56:21,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:56:21,674 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 02:56:21,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 02:56:21,795 INFO L192 MainTranslator]: Completed translation [2019-10-15 02:56:21,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21 WrapperNode [2019-10-15 02:56:21,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 02:56:21,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 02:56:21,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 02:56:21,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 02:56:21,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (1/1) ... [2019-10-15 02:56:21,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 02:56:21,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 02:56:21,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 02:56:21,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 02:56:21,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (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 02:56:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 02:56:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 02:56:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-10-15 02:56:21,912 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2019-10-15 02:56:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-10-15 02:56:21,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 02:56:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 02:56:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 02:56:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-15 02:56:21,913 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-15 02:56:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 02:56:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2019-10-15 02:56:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-15 02:56:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 02:56:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 02:56:21,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 02:56:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 02:56:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-15 02:56:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 02:56:21,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 02:56:22,377 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 02:56:22,377 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 02:56:22,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:56:22 BoogieIcfgContainer [2019-10-15 02:56:22,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 02:56:22,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 02:56:22,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 02:56:22,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 02:56:22,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:56:21" (1/3) ... [2019-10-15 02:56:22,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78020e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:56:22, skipping insertion in model container [2019-10-15 02:56:22,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:56:21" (2/3) ... [2019-10-15 02:56:22,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78020e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:56:22, skipping insertion in model container [2019-10-15 02:56:22,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:56:22" (3/3) ... [2019-10-15 02:56:22,387 INFO L109 eAbstractionObserver]: Analyzing ICFG test22-1.c [2019-10-15 02:56:22,396 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 02:56:22,404 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 02:56:22,416 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 02:56:22,443 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 02:56:22,444 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 02:56:22,444 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 02:56:22,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 02:56:22,444 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 02:56:22,445 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 02:56:22,445 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 02:56:22,445 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 02:56:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-10-15 02:56:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 02:56:22,468 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:56:22,469 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:56:22,471 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:56:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:56:22,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1141463389, now seen corresponding path program 1 times [2019-10-15 02:56:22,486 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:56:22,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174096952] [2019-10-15 02:56:22,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:22,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:22,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:56:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 02:56:22,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174096952] [2019-10-15 02:56:22,697 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:56:22,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 02:56:22,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970511249] [2019-10-15 02:56:22,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 02:56:22,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:56:22,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 02:56:22,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:56:22,729 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-10-15 02:56:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:56:22,765 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-10-15 02:56:22,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 02:56:22,768 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2019-10-15 02:56:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:56:22,783 INFO L225 Difference]: With dead ends: 42 [2019-10-15 02:56:22,784 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 02:56:22,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 02:56:22,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 02:56:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 02:56:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 02:56:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-10-15 02:56:22,858 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 27 [2019-10-15 02:56:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:56:22,862 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-10-15 02:56:22,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 02:56:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-10-15 02:56:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 02:56:22,865 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:56:22,865 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:56:22,866 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:56:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:56:22,867 INFO L82 PathProgramCache]: Analyzing trace with hash -14407859, now seen corresponding path program 1 times [2019-10-15 02:56:22,868 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:56:22,868 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987789185] [2019-10-15 02:56:22,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:22,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:22,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:56:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 02:56:23,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987789185] [2019-10-15 02:56:23,170 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 02:56:23,170 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 02:56:23,170 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957543322] [2019-10-15 02:56:23,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 02:56:23,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:56:23,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 02:56:23,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 02:56:23,174 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 5 states. [2019-10-15 02:56:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 02:56:23,317 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-10-15 02:56:23,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 02:56:23,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-10-15 02:56:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 02:56:23,320 INFO L225 Difference]: With dead ends: 34 [2019-10-15 02:56:23,320 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 02:56:23,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 02:56:23,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 02:56:23,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-15 02:56:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 02:56:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-15 02:56:23,337 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 28 [2019-10-15 02:56:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 02:56:23,338 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-15 02:56:23,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 02:56:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-15 02:56:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 02:56:23,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 02:56:23,343 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 02:56:23,344 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 02:56:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 02:56:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash 627266706, now seen corresponding path program 1 times [2019-10-15 02:56:23,345 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 02:56:23,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546189360] [2019-10-15 02:56:23,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:23,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 02:56:23,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 02:56:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 02:56:23,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546189360] [2019-10-15 02:56:23,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070377624] [2019-10-15 02:56:23,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 02:56:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 02:56:23,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 02:56:23,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 02:56:23,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:56:23,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:56:23,897 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 02:56:23,962 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2019-10-15 02:56:23,972 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 02:56:23,977 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2019-10-15 02:56:23,978 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-15 02:56:23,998 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 02:56:23,999 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 02:56:24,000 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:9 [2019-10-15 02:56:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 02:56:24,026 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 02:56:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 02:56:24,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1247400184] [2019-10-15 02:56:24,162 INFO L162 IcfgInterpreter]: Started Sifa with 25 locations of interest [2019-10-15 02:56:24,163 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 02:56:24,168 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 02:56:24,176 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 02:56:24,176 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 02:56:24,472 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 59 for LOIs [2019-10-15 02:56:24,682 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2019-10-15 02:56:30,794 INFO L199 IcfgInterpreter]: Interpreting procedure check with input of size 21 for LOIs [2019-10-15 02:56:30,805 INFO L199 IcfgInterpreter]: Interpreting procedure get_dummy with input of size 49 for LOIs [2019-10-15 02:56:30,824 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 25 for LOIs [2019-10-15 02:56:30,832 INFO L199 IcfgInterpreter]: Interpreting procedure init with input of size 59 for LOIs [2019-10-15 02:56:30,843 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 02:56:31,126 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2019-10-15 02:56:31,267 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2019-10-15 02:56:31,413 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-10-15 02:56:35,635 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2019-10-15 02:56:38,191 WARN L191 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2019-10-15 02:56:40,605 WARN L191 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2019-10-15 02:56:40,970 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2019-10-15 02:56:41,508 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 02:56:41,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 19] total 34 [2019-10-15 02:56:41,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934741710] [2019-10-15 02:56:41,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 02:56:41,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 02:56:41,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 02:56:41,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=998, Unknown=4, NotChecked=0, Total=1122 [2019-10-15 02:56:41,512 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 34 states. [2019-10-15 02:56:45,724 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2019-10-15 02:56:56,526 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2019-10-15 02:56:58,823 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2019-10-15 02:57:03,209 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 114