/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --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/array-examples/standard_copy2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:21:33,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:21:33,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:21:33,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:21:33,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:21:33,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:21:33,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:21:33,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:21:33,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:21:33,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:21:33,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:21:33,131 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:21:33,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:21:33,132 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:21:33,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:21:33,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:21:33,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:21:33,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:21:33,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:21:33,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:21:33,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:21:33,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:21:33,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:21:33,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:21:33,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 01:21:33,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 01:21:33,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 01:21:33,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 01:21:33,164 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 01:21:33,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 01:21:33,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 01:21:33,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 01:21:33,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 01:21:33,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 01:21:33,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 01:21:33,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 01:21:33,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 01:21:33,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 01:21:33,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:21:33,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:21:33,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:21:33,183 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 [2019-11-07 01:21:33,205 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:21:33,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:21:33,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:21:33,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:21:33,208 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:21:33,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:21:33,208 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:21:33,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:21:33,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:21:33,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:21:33,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:21:33,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:21:33,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:21:33,211 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:21:33,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:21:33,211 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:21:33,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:21:33,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:21:33,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:21:33,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:21:33,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:21:33,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:21:33,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:21:33,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:21:33,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:21:33,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:21:33,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:21:33,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:21:33,214 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 [2019-11-07 01:21:33,520 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:21:33,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:21:33,537 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:21:33,538 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:21:33,539 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:21:33,539 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-11-07 01:21:33,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c734bcacf/e02ccfc40b364ec58b9835981682fc76/FLAGed9b9becc [2019-11-07 01:21:34,064 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:21:34,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-1.i [2019-11-07 01:21:34,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c734bcacf/e02ccfc40b364ec58b9835981682fc76/FLAGed9b9becc [2019-11-07 01:21:34,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c734bcacf/e02ccfc40b364ec58b9835981682fc76 [2019-11-07 01:21:34,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:21:34,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:21:34,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:34,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:21:34,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:21:34,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55b8d5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34, skipping insertion in model container [2019-11-07 01:21:34,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,530 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:21:34,550 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:21:34,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:34,730 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:21:34,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:34,767 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:21:34,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34 WrapperNode [2019-11-07 01:21:34,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:34,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:21:34,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:21:34,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:21:34,861 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (1/1) ... [2019-11-07 01:21:34,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:21:34,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:21:34,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:21:34,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:21:34,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (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 [2019-11-07 01:21:34,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:21:34,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:21:34,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:21:34,951 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:21:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:21:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:21:34,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:21:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:21:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:21:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:21:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:21:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:21:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:21:34,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:21:35,340 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:21:35,341 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 01:21:35,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:35 BoogieIcfgContainer [2019-11-07 01:21:35,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:21:35,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:21:35,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:21:35,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:21:35,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:21:34" (1/3) ... [2019-11-07 01:21:35,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21588061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:35, skipping insertion in model container [2019-11-07 01:21:35,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:34" (2/3) ... [2019-11-07 01:21:35,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21588061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:35, skipping insertion in model container [2019-11-07 01:21:35,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:35" (3/3) ... [2019-11-07 01:21:35,351 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2019-11-07 01:21:35,360 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:21:35,368 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:21:35,379 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:21:35,404 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:21:35,404 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:21:35,404 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:21:35,404 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:21:35,405 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:21:35,405 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:21:35,405 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:21:35,405 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:21:35,420 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:21:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:21:35,425 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:35,426 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:35,428 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1240250468, now seen corresponding path program 1 times [2019-11-07 01:21:35,440 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:35,440 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369693631] [2019-11-07 01:21:35,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:21:35,603 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369693631] [2019-11-07 01:21:35,604 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:35,605 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:35,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989413929] [2019-11-07 01:21:35,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:35,611 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:35,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:35,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:35,625 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:21:35,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:35,657 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2019-11-07 01:21:35,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:35,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:21:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:35,673 INFO L225 Difference]: With dead ends: 35 [2019-11-07 01:21:35,673 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:21:35,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:35,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:21:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:21:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:21:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2019-11-07 01:21:35,715 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2019-11-07 01:21:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:35,716 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2019-11-07 01:21:35,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2019-11-07 01:21:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:21:35,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:35,717 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:35,718 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:35,718 INFO L82 PathProgramCache]: Analyzing trace with hash 650913249, now seen corresponding path program 1 times [2019-11-07 01:21:35,719 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:35,719 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577072139] [2019-11-07 01:21:35,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:35,770 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577072139] [2019-11-07 01:21:35,771 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:35,771 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:35,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582398995] [2019-11-07 01:21:35,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:35,773 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:35,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:35,774 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2019-11-07 01:21:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:35,791 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-11-07 01:21:35,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:35,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-07 01:21:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:35,793 INFO L225 Difference]: With dead ends: 30 [2019-11-07 01:21:35,793 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:21:35,794 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:21:35,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:21:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:21:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-07 01:21:35,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-11-07 01:21:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:35,801 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-07 01:21:35,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-07 01:21:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:21:35,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:35,802 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:35,802 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash -586370056, now seen corresponding path program 1 times [2019-11-07 01:21:35,803 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:35,803 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495155600] [2019-11-07 01:21:35,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:21:35,894 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495155600] [2019-11-07 01:21:35,895 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023452188] [2019-11-07 01:21:35,895 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 [2019-11-07 01:21:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:35,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:21:35,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:21:36,026 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-07 01:21:36,058 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199303577] [2019-11-07 01:21:36,083 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:36,083 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:36,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:36,096 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:36,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:36,225 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:37,009 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:37,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:37,021 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:37,305 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:37,305 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:21:37,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017940107] [2019-11-07 01:21:37,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:21:37,308 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:21:37,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:21:37,309 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 18 states. [2019-11-07 01:21:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:37,984 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2019-11-07 01:21:37,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:21:37,985 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-11-07 01:21:37,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:37,986 INFO L225 Difference]: With dead ends: 47 [2019-11-07 01:21:37,986 INFO L226 Difference]: Without dead ends: 34 [2019-11-07 01:21:37,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:21:37,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-07 01:21:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-11-07 01:21:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 01:21:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-07 01:21:37,996 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2019-11-07 01:21:37,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:37,996 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-07 01:21:37,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:21:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-07 01:21:37,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:21:37,997 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:37,998 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:38,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:38,202 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:38,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1834779132, now seen corresponding path program 2 times [2019-11-07 01:21:38,202 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:38,204 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477244708] [2019-11-07 01:21:38,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:38,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 01:21:38,402 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477244708] [2019-11-07 01:21:38,402 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265886553] [2019-11-07 01:21:38,403 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:38,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:21:38,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:38,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:21:38,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 01:21:38,472 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-07 01:21:38,499 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58975910] [2019-11-07 01:21:38,501 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:38,502 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:38,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:38,503 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:38,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:38,533 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:39,047 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:21:39,142 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:39,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:39,150 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:39,387 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:39,388 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 11] total 19 [2019-11-07 01:21:39,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391936668] [2019-11-07 01:21:39,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-07 01:21:39,389 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:39,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-07 01:21:39,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2019-11-07 01:21:39,390 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 19 states. [2019-11-07 01:21:39,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:39,972 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2019-11-07 01:21:39,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:21:39,972 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2019-11-07 01:21:39,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:39,973 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:21:39,974 INFO L226 Difference]: Without dead ends: 42 [2019-11-07 01:21:39,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2019-11-07 01:21:39,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-07 01:21:39,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-11-07 01:21:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 01:21:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-11-07 01:21:39,991 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 21 [2019-11-07 01:21:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:39,991 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-11-07 01:21:39,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-07 01:21:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-11-07 01:21:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-07 01:21:39,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:39,995 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:40,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:40,196 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash -12438844, now seen corresponding path program 3 times [2019-11-07 01:21:40,198 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:40,198 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202796978] [2019-11-07 01:21:40,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-07 01:21:40,389 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202796978] [2019-11-07 01:21:40,389 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947250064] [2019-11-07 01:21:40,389 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:40,449 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:40,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:40,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:21:40,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 01:21:40,501 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-07 01:21:40,582 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137806662] [2019-11-07 01:21:40,583 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:40,583 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:40,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:40,584 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:40,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:40,606 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:41,103 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:41,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:41,111 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:41,517 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:41,518 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7, 11] total 29 [2019-11-07 01:21:41,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669192209] [2019-11-07 01:21:41,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-07 01:21:41,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:41,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-07 01:21:41,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2019-11-07 01:21:41,524 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 29 states. [2019-11-07 01:21:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:42,578 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2019-11-07 01:21:42,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-07 01:21:42,578 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2019-11-07 01:21:42,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:42,579 INFO L225 Difference]: With dead ends: 73 [2019-11-07 01:21:42,579 INFO L226 Difference]: Without dead ends: 50 [2019-11-07 01:21:42,581 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=2358, Unknown=0, NotChecked=0, Total=2756 [2019-11-07 01:21:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-07 01:21:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2019-11-07 01:21:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-07 01:21:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-11-07 01:21:42,590 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 29 [2019-11-07 01:21:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:42,590 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-11-07 01:21:42,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-07 01:21:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-11-07 01:21:42,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-07 01:21:42,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:42,592 INFO L410 BasicCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:42,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:42,795 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:42,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1328394821, now seen corresponding path program 4 times [2019-11-07 01:21:42,797 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:42,797 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14138725] [2019-11-07 01:21:42,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-07 01:21:42,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14138725] [2019-11-07 01:21:42,938 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720862350] [2019-11-07 01:21:42,938 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:43,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:21:43,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-07 01:21:43,155 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-07 01:21:43,371 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46756033] [2019-11-07 01:21:43,372 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:43,372 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:43,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:43,373 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:43,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:43,399 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:43,901 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:43,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:43,914 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:44,284 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:44,285 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13, 11] total 42 [2019-11-07 01:21:44,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575863501] [2019-11-07 01:21:44,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-07 01:21:44,286 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:44,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-07 01:21:44,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1373, Unknown=0, NotChecked=0, Total=1722 [2019-11-07 01:21:44,288 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 42 states. [2019-11-07 01:21:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:46,175 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2019-11-07 01:21:46,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-07 01:21:46,175 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 37 [2019-11-07 01:21:46,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:46,177 INFO L225 Difference]: With dead ends: 89 [2019-11-07 01:21:46,177 INFO L226 Difference]: Without dead ends: 64 [2019-11-07 01:21:46,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1057, Invalid=5105, Unknown=0, NotChecked=0, Total=6162 [2019-11-07 01:21:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-07 01:21:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2019-11-07 01:21:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-07 01:21:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2019-11-07 01:21:46,190 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 37 [2019-11-07 01:21:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:46,190 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2019-11-07 01:21:46,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-07 01:21:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2019-11-07 01:21:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-07 01:21:46,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:46,192 INFO L410 BasicCegarLoop]: trace histogram [22, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:46,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:46,393 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash -296741436, now seen corresponding path program 5 times [2019-11-07 01:21:46,394 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:46,394 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128488922] [2019-11-07 01:21:46,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-07 01:21:46,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128488922] [2019-11-07 01:21:46,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120780853] [2019-11-07 01:21:46,818 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:47,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-07 01:21:47,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:47,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:21:47,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-07 01:21:47,939 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-07 01:21:48,131 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515238948] [2019-11-07 01:21:48,133 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:48,133 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:48,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:48,133 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:48,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:48,154 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:48,435 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-11-07 01:21:48,776 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:48,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:48,782 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:49,171 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:49,171 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11, 11, 11] total 53 [2019-11-07 01:21:49,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59635282] [2019-11-07 01:21:49,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-07 01:21:49,174 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-07 01:21:49,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=2238, Unknown=0, NotChecked=0, Total=2756 [2019-11-07 01:21:49,176 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 53 states. [2019-11-07 01:21:51,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:51,710 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2019-11-07 01:21:51,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-07 01:21:51,715 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 51 [2019-11-07 01:21:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:51,718 INFO L225 Difference]: With dead ends: 112 [2019-11-07 01:21:51,718 INFO L226 Difference]: Without dead ends: 85 [2019-11-07 01:21:51,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1584, Invalid=8516, Unknown=0, NotChecked=0, Total=10100 [2019-11-07 01:21:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-07 01:21:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2019-11-07 01:21:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-07 01:21:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2019-11-07 01:21:51,738 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 51 [2019-11-07 01:21:51,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:51,738 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2019-11-07 01:21:51,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-07 01:21:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2019-11-07 01:21:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-07 01:21:51,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:51,741 INFO L410 BasicCegarLoop]: trace histogram [23, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:51,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:51,963 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:51,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1680385249, now seen corresponding path program 6 times [2019-11-07 01:21:51,964 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:51,964 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124923690] [2019-11-07 01:21:51,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-07 01:21:52,423 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124923690] [2019-11-07 01:21:52,423 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090334808] [2019-11-07 01:21:52,423 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:52,560 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:52,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:52,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-07 01:21:52,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-07 01:21:52,598 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-07 01:21:53,380 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587543348] [2019-11-07 01:21:53,382 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:21:53,382 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:53,382 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:53,382 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:53,383 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:53,400 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:53,835 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:53,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:53,846 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:54,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:54,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 11] total 61 [2019-11-07 01:21:54,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807437509] [2019-11-07 01:21:54,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-11-07 01:21:54,190 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:54,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-11-07 01:21:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2356, Unknown=0, NotChecked=0, Total=3660 [2019-11-07 01:21:54,191 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 61 states. [2019-11-07 01:21:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:56,722 INFO L93 Difference]: Finished difference Result 157 states and 187 transitions. [2019-11-07 01:21:56,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-11-07 01:21:56,723 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 72 [2019-11-07 01:21:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:56,724 INFO L225 Difference]: With dead ends: 157 [2019-11-07 01:21:56,724 INFO L226 Difference]: Without dead ends: 110 [2019-11-07 01:21:56,730 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3807, Invalid=9533, Unknown=0, NotChecked=0, Total=13340 [2019-11-07 01:21:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-07 01:21:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2019-11-07 01:21:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-07 01:21:56,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2019-11-07 01:21:56,744 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 72 [2019-11-07 01:21:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:56,745 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2019-11-07 01:21:56,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-11-07 01:21:56,745 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2019-11-07 01:21:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-07 01:21:56,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:56,747 INFO L410 BasicCegarLoop]: trace histogram [48, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:56,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:56,951 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:56,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:56,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1702326076, now seen corresponding path program 7 times [2019-11-07 01:21:56,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:56,952 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671215991] [2019-11-07 01:21:56,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-07 01:21:58,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671215991] [2019-11-07 01:21:58,311 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675564652] [2019-11-07 01:21:58,312 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:58,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-07 01:21:58,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-07 01:21:58,484 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:22:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-07 01:22:01,061 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [819808070] [2019-11-07 01:22:01,063 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:22:01,063 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:22:01,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:22:01,064 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:22:01,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:22:01,081 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:22:01,302 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:22:01,529 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:22:01,601 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:22:01,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:22:01,611 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:22:02,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:22:02,371 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51, 11] total 111 [2019-11-07 01:22:02,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645060845] [2019-11-07 01:22:02,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-11-07 01:22:02,374 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:22:02,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-11-07 01:22:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5079, Invalid=7131, Unknown=0, NotChecked=0, Total=12210 [2019-11-07 01:22:02,385 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 111 states. [2019-11-07 01:22:10,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:22:10,477 INFO L93 Difference]: Finished difference Result 207 states and 262 transitions. [2019-11-07 01:22:10,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-11-07 01:22:10,477 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 97 [2019-11-07 01:22:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:22:10,480 INFO L225 Difference]: With dead ends: 207 [2019-11-07 01:22:10,480 INFO L226 Difference]: Without dead ends: 160 [2019-11-07 01:22:10,487 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9104 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=15032, Invalid=31408, Unknown=0, NotChecked=0, Total=46440 [2019-11-07 01:22:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-07 01:22:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 151. [2019-11-07 01:22:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-11-07 01:22:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2019-11-07 01:22:10,506 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 97 [2019-11-07 01:22:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:22:10,507 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2019-11-07 01:22:10,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-11-07 01:22:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2019-11-07 01:22:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-07 01:22:10,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:22:10,510 INFO L410 BasicCegarLoop]: trace histogram [98, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:22:10,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:22:10,713 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:22:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:22:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2035697508, now seen corresponding path program 8 times [2019-11-07 01:22:10,713 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:22:10,714 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493056619] [2019-11-07 01:22:10,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:22:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:22:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5193 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 5022 trivial. 0 not checked. [2019-11-07 01:22:11,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493056619] [2019-11-07 01:22:11,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105780264] [2019-11-07 01:22:11,908 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true