/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_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:25:44,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:25:44,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:25:44,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:25:44,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:25:44,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:25:44,194 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:25:44,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:25:44,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:25:44,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:25:44,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:25:44,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:25:44,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:25:44,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:25:44,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:25:44,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:25:44,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:25:44,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:25:44,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:25:44,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:25:44,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:25:44,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:25:44,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:25:44,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:25:44,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 01:25:44,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 01:25:44,250 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 01:25:44,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 01:25:44,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 01:25:44,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 01:25:44,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 01:25:44,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 01:25:44,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 01:25:44,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 01:25:44,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 01:25:44,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 01:25:44,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 01:25:44,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 01:25:44,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:25:44,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:25:44,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:25:44,263 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 01:25:44,278 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:25:44,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:25:44,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:25:44,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:25:44,280 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:25:44,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:25:44,281 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:25:44,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:25:44,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:25:44,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:25:44,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:25:44,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:25:44,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:25:44,282 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:25:44,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:25:44,283 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:25:44,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:25:44,283 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:25:44,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:25:44,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:25:44,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:25:44,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:25:44,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:25:44,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:25:44,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:25:44,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:25:44,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:25:44,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:25:44,285 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 01:25:44,598 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:25:44,618 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:25:44,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:25:44,624 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:25:44,624 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:25:44,625 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2019-11-07 01:25:44,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4373c0eb8/c6ff8ac433744623b173e2fb9f1af848/FLAG3ff368c8c [2019-11-07 01:25:45,141 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:25:45,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2019-11-07 01:25:45,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4373c0eb8/c6ff8ac433744623b173e2fb9f1af848/FLAG3ff368c8c [2019-11-07 01:25:45,524 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4373c0eb8/c6ff8ac433744623b173e2fb9f1af848 [2019-11-07 01:25:45,539 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:25:45,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:25:45,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:25:45,559 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:25:45,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:25:45,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:45" (1/1) ... [2019-11-07 01:25:45,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16bc5078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45, skipping insertion in model container [2019-11-07 01:25:45,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:45" (1/1) ... [2019-11-07 01:25:45,599 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:25:45,632 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:25:45,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:25:45,843 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:25:45,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:25:45,882 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:25:45,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45 WrapperNode [2019-11-07 01:25:45,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:25:45,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:25:45,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:25:45,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:25:45,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45" (1/1) ... [2019-11-07 01:25:45,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45" (1/1) ... [2019-11-07 01:25:45,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45" (1/1) ... [2019-11-07 01:25:45,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45" (1/1) ... [2019-11-07 01:25:45,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45" (1/1) ... [2019-11-07 01:25:45,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45" (1/1) ... [2019-11-07 01:25:45,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45" (1/1) ... [2019-11-07 01:25:46,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:25:46,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:25:46,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:25:46,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:25:46,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45" (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 01:25:46,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:25:46,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:25:46,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:25:46,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:25:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:25:46,057 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:25:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:25:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:25:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:25:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:25:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:25:46,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:25:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:25:46,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:25:46,485 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:25:46,486 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-07 01:25:46,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:46 BoogieIcfgContainer [2019-11-07 01:25:46,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:25:46,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:25:46,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:25:46,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:25:46,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:45" (1/3) ... [2019-11-07 01:25:46,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c85887a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:46, skipping insertion in model container [2019-11-07 01:25:46,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:45" (2/3) ... [2019-11-07 01:25:46,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c85887a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:46, skipping insertion in model container [2019-11-07 01:25:46,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:46" (3/3) ... [2019-11-07 01:25:46,495 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2019-11-07 01:25:46,507 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:25:46,517 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:25:46,529 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:25:46,554 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:25:46,554 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:25:46,554 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:25:46,555 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:25:46,555 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:25:46,555 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:25:46,555 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:25:46,555 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:25:46,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-07 01:25:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:25:46,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:46,579 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:46,581 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:46,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:46,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2016740759, now seen corresponding path program 1 times [2019-11-07 01:25:46,592 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:46,593 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261083238] [2019-11-07 01:25:46,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:46,764 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 01:25:46,765 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261083238] [2019-11-07 01:25:46,768 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:25:46,768 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:25:46,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732430567] [2019-11-07 01:25:46,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:25:46,776 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:46,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:25:46,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:25:46,789 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-07 01:25:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:46,850 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2019-11-07 01:25:46,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:25:46,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:25:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:46,862 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:25:46,863 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 01:25:46,866 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 01:25:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 01:25:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 01:25:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 01:25:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 01:25:46,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2019-11-07 01:25:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:46,909 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 01:25:46,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:25:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 01:25:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:25:46,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:46,911 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:46,912 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:46,912 INFO L82 PathProgramCache]: Analyzing trace with hash 826554714, now seen corresponding path program 1 times [2019-11-07 01:25:46,913 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:46,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326660082] [2019-11-07 01:25:46,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:25:47,013 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326660082] [2019-11-07 01:25:47,013 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926972647] [2019-11-07 01:25:47,013 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 01:25:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:47,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:25:47,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:25:47,140 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:25:47,182 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1647582326] [2019-11-07 01:25:47,208 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:25:47,208 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:47,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:47,221 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:47,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:47,354 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:47,728 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-11-07 01:25:47,913 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:25:47,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:47,924 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:48,159 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:48,160 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-11-07 01:25:48,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223188083] [2019-11-07 01:25:48,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:25:48,163 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:48,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:25:48,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:25:48,166 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 17 states. [2019-11-07 01:25:48,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:48,775 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2019-11-07 01:25:48,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:25:48,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-11-07 01:25:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:48,778 INFO L225 Difference]: With dead ends: 47 [2019-11-07 01:25:48,778 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 01:25:48,779 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:25:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 01:25:48,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2019-11-07 01:25:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 01:25:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-07 01:25:48,791 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2019-11-07 01:25:48,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:48,791 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-07 01:25:48,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:25:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-07 01:25:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:25:48,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:48,793 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:49,010 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:49,011 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:49,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1090629335, now seen corresponding path program 2 times [2019-11-07 01:25:49,012 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:49,012 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195081079] [2019-11-07 01:25:49,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:25:49,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195081079] [2019-11-07 01:25:49,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199554192] [2019-11-07 01:25:49,210 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 01:25:49,281 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:25:49,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:49,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:25:49,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:49,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:25:49,297 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:25:49,391 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [71662470] [2019-11-07 01:25:49,393 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:25:49,393 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:49,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:49,394 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:49,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:49,434 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:51,720 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:25:51,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:51,731 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:51,938 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:51,938 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-11-07 01:25:51,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056320841] [2019-11-07 01:25:51,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:25:51,939 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:51,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:25:51,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:25:51,940 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 23 states. [2019-11-07 01:25:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:52,703 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2019-11-07 01:25:52,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:25:52,706 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-11-07 01:25:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:52,707 INFO L225 Difference]: With dead ends: 62 [2019-11-07 01:25:52,707 INFO L226 Difference]: Without dead ends: 45 [2019-11-07 01:25:52,709 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:25:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-07 01:25:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2019-11-07 01:25:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-07 01:25:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-07 01:25:52,719 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 20 [2019-11-07 01:25:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:52,720 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-07 01:25:52,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:25:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-07 01:25:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:25:52,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:52,721 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:52,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:52,925 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash -441096375, now seen corresponding path program 3 times [2019-11-07 01:25:52,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:52,927 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491364465] [2019-11-07 01:25:52,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:25:53,104 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491364465] [2019-11-07 01:25:53,104 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658083202] [2019-11-07 01:25:53,104 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 01:25:53,184 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:25:53,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:53,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:25:53,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:25:53,202 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:25:53,394 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292258319] [2019-11-07 01:25:53,397 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:25:53,397 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:53,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:53,398 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:53,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:53,421 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:53,675 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:25:53,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:53,681 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:53,959 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:53,959 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-11-07 01:25:53,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592490290] [2019-11-07 01:25:53,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:25:53,961 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:53,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:25:53,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:25:53,964 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 35 states. [2019-11-07 01:25:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:55,418 INFO L93 Difference]: Finished difference Result 92 states and 126 transitions. [2019-11-07 01:25:55,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:25:55,419 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2019-11-07 01:25:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:55,420 INFO L225 Difference]: With dead ends: 92 [2019-11-07 01:25:55,420 INFO L226 Difference]: Without dead ends: 69 [2019-11-07 01:25:55,423 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=979, Invalid=3053, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:25:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-07 01:25:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2019-11-07 01:25:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-07 01:25:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-11-07 01:25:55,435 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 32 [2019-11-07 01:25:55,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:55,436 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-11-07 01:25:55,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:25:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-11-07 01:25:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-07 01:25:55,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:55,438 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:55,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:55,649 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash -581051511, now seen corresponding path program 4 times [2019-11-07 01:25:55,650 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:55,651 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300847680] [2019-11-07 01:25:55,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:25:56,027 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300847680] [2019-11-07 01:25:56,028 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230300535] [2019-11-07 01:25:56,028 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 01:25:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:56,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:25:56,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:25:56,147 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:25:56,863 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342442327] [2019-11-07 01:25:56,865 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:25:56,865 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:56,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:56,866 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:56,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:56,892 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:57,168 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:25:57,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:57,174 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:57,611 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:57,611 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-11-07 01:25:57,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431644136] [2019-11-07 01:25:57,613 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:25:57,613 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:57,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:25:57,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:25:57,616 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 59 states. [2019-11-07 01:26:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:26:00,736 INFO L93 Difference]: Finished difference Result 152 states and 210 transitions. [2019-11-07 01:26:00,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:26:00,737 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 56 [2019-11-07 01:26:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:26:00,738 INFO L225 Difference]: With dead ends: 152 [2019-11-07 01:26:00,738 INFO L226 Difference]: Without dead ends: 117 [2019-11-07 01:26:00,742 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3607, Invalid=8825, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:26:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-07 01:26:00,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2019-11-07 01:26:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-07 01:26:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2019-11-07 01:26:00,759 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 56 [2019-11-07 01:26:00,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:26:00,760 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2019-11-07 01:26:00,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:26:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2019-11-07 01:26:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-07 01:26:00,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:26:00,764 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:26:00,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:26:00,976 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:26:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:26:00,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1405084681, now seen corresponding path program 5 times [2019-11-07 01:26:00,977 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:26:00,977 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50533099] [2019-11-07 01:26:00,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:26:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:26:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-07 01:26:02,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50533099] [2019-11-07 01:26:02,113 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817698135] [2019-11-07 01:26:02,113 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