/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-programs/copysome1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:31:05,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:31:05,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:31:05,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:31:05,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:31:05,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:31:05,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:31:05,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:31:05,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:31:05,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:31:05,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:31:05,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:31:05,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:31:05,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:31:05,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:31:05,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:31:05,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:31:05,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:31:05,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:31:05,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:31:05,091 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 01:31:05,118 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:31:05,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:31:05,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:31:05,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:31:05,120 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:31:05,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:31:05,120 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:31:05,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:31:05,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:31:05,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:31:05,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:31:05,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:31:05,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:31:05,122 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:31:05,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:31:05,122 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:31:05,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:31:05,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:31:05,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:31:05,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:31:05,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:31:05,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:31:05,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:31:05,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:31:05,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:31:05,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:31:05,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:31:05,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:31:05,125 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 01:31:05,446 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:31:05,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:31:05,468 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:31:05,469 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:31:05,470 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:31:05,470 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/copysome1-2.i [2019-11-07 01:31:05,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45cbd2242/6c6af385f4c449ef824c77a47a859e6d/FLAG5c8fe0618 [2019-11-07 01:31:06,032 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:31:06,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/copysome1-2.i [2019-11-07 01:31:06,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45cbd2242/6c6af385f4c449ef824c77a47a859e6d/FLAG5c8fe0618 [2019-11-07 01:31:06,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45cbd2242/6c6af385f4c449ef824c77a47a859e6d [2019-11-07 01:31:06,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:31:06,356 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:31:06,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:31:06,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:31:06,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:31:06,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:06" (1/1) ... [2019-11-07 01:31:06,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f9beeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06, skipping insertion in model container [2019-11-07 01:31:06,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:31:06" (1/1) ... [2019-11-07 01:31:06,372 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:31:06,390 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:31:06,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:31:06,572 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:31:06,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:31:06,609 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:31:06,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06 WrapperNode [2019-11-07 01:31:06,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:31:06,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:31:06,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:31:06,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:31:06,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06" (1/1) ... [2019-11-07 01:31:06,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06" (1/1) ... [2019-11-07 01:31:06,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06" (1/1) ... [2019-11-07 01:31:06,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06" (1/1) ... [2019-11-07 01:31:06,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06" (1/1) ... [2019-11-07 01:31:06,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06" (1/1) ... [2019-11-07 01:31:06,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06" (1/1) ... [2019-11-07 01:31:06,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:31:06,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:31:06,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:31:06,733 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:31:06,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06" (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 01:31:06,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:31:06,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:31:06,790 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:31:06,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:31:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:31:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:31:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:31:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:31:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:31:06,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:31:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:31:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:31:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:31:06,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:31:07,196 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:31:07,196 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:31:07,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:07 BoogieIcfgContainer [2019-11-07 01:31:07,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:31:07,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:31:07,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:31:07,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:31:07,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:31:06" (1/3) ... [2019-11-07 01:31:07,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4825ca62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:07, skipping insertion in model container [2019-11-07 01:31:07,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:31:06" (2/3) ... [2019-11-07 01:31:07,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4825ca62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:31:07, skipping insertion in model container [2019-11-07 01:31:07,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:31:07" (3/3) ... [2019-11-07 01:31:07,206 INFO L109 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2019-11-07 01:31:07,213 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:31:07,222 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:31:07,235 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:31:07,265 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:31:07,265 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:31:07,265 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:31:07,265 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:31:07,266 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:31:07,266 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:31:07,266 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:31:07,266 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:31:07,281 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-07 01:31:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:31:07,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:07,288 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:07,289 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:07,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1868090127, now seen corresponding path program 1 times [2019-11-07 01:31:07,302 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:07,302 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538240574] [2019-11-07 01:31:07,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:07,491 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 01:31:07,492 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538240574] [2019-11-07 01:31:07,493 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:31:07,494 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:31:07,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276893375] [2019-11-07 01:31:07,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:31:07,504 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:07,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:31:07,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:31:07,525 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-07 01:31:07,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:07,598 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-11-07 01:31:07,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:31:07,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:31:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:07,611 INFO L225 Difference]: With dead ends: 38 [2019-11-07 01:31:07,612 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 01:31:07,619 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 01:31:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 01:31:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 01:31:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 01:31:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-07 01:31:07,671 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2019-11-07 01:31:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:07,673 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-07 01:31:07,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:31:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-07 01:31:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 01:31:07,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:07,676 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:07,678 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:07,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1341324973, now seen corresponding path program 1 times [2019-11-07 01:31:07,680 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:07,680 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010956910] [2019-11-07 01:31:07,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:07,825 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 01:31:07,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010956910] [2019-11-07 01:31:07,830 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365608072] [2019-11-07 01:31:07,831 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 01:31:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:07,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:31:07,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:07,974 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 01:31:07,974 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:31:08,016 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 01:31:08,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763318229] [2019-11-07 01:31:08,052 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:31:08,052 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:31:08,078 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:31:08,093 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:31:08,093 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:31:08,240 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:31:10,704 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:31:10,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:31:10,717 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:31:11,097 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:31:11,097 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-11-07 01:31:11,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73661299] [2019-11-07 01:31:11,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:31:11,100 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:11,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:31:11,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:31:11,101 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 17 states. [2019-11-07 01:31:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:11,862 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-11-07 01:31:11,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:31:11,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2019-11-07 01:31:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:11,865 INFO L225 Difference]: With dead ends: 50 [2019-11-07 01:31:11,865 INFO L226 Difference]: Without dead ends: 37 [2019-11-07 01:31:11,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:31:11,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-07 01:31:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-11-07 01:31:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 01:31:11,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-11-07 01:31:11,878 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2019-11-07 01:31:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:11,878 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-11-07 01:31:11,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:31:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-11-07 01:31:11,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:31:11,879 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:11,880 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:12,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:12,092 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:12,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:12,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2023407985, now seen corresponding path program 2 times [2019-11-07 01:31:12,093 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:12,093 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786150065] [2019-11-07 01:31:12,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:12,286 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 01:31:12,287 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786150065] [2019-11-07 01:31:12,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181973202] [2019-11-07 01:31:12,290 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 01:31:12,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:31:12,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:31:12,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:31:12,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:12,358 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 01:31:12,358 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:31:12,432 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 01:31:12,433 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713098146] [2019-11-07 01:31:12,434 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:31:12,436 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:31:12,436 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:31:12,437 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:31:12,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:31:12,471 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:31:12,788 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:31:12,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:31:12,802 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:31:13,096 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:31:13,096 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-11-07 01:31:13,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171312231] [2019-11-07 01:31:13,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:31:13,098 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:31:13,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:31:13,099 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 23 states. [2019-11-07 01:31:13,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:13,895 INFO L93 Difference]: Finished difference Result 67 states and 84 transitions. [2019-11-07 01:31:13,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:31:13,895 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 21 [2019-11-07 01:31:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:13,897 INFO L225 Difference]: With dead ends: 67 [2019-11-07 01:31:13,897 INFO L226 Difference]: Without dead ends: 49 [2019-11-07 01:31:13,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:31:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-07 01:31:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2019-11-07 01:31:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-07 01:31:13,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-11-07 01:31:13,908 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 21 [2019-11-07 01:31:13,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:13,908 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-11-07 01:31:13,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:31:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-11-07 01:31:13,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-07 01:31:13,910 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:13,910 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:14,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:14,122 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:14,123 INFO L82 PathProgramCache]: Analyzing trace with hash -263599153, now seen corresponding path program 3 times [2019-11-07 01:31:14,123 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:14,123 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332254417] [2019-11-07 01:31:14,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:14,290 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 01:31:14,290 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332254417] [2019-11-07 01:31:14,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394850612] [2019-11-07 01:31:14,291 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 01:31:14,373 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:31:14,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:31:14,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:31:14,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:14,411 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 01:31:14,411 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:31:14,646 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 01:31:14,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098123709] [2019-11-07 01:31:14,649 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:31:14,649 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:31:14,651 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:31:14,651 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:31:14,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:31:14,676 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:31:14,896 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:31:14,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:31:14,904 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:31:15,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:31:15,210 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-11-07 01:31:15,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044652854] [2019-11-07 01:31:15,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:31:15,212 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:15,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:31:15,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:31:15,213 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 35 states. [2019-11-07 01:31:16,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:16,709 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2019-11-07 01:31:16,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:31:16,710 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 33 [2019-11-07 01:31:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:16,712 INFO L225 Difference]: With dead ends: 97 [2019-11-07 01:31:16,712 INFO L226 Difference]: Without dead ends: 73 [2019-11-07 01:31:16,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=979, Invalid=3053, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:31:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-07 01:31:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-11-07 01:31:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-07 01:31:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2019-11-07 01:31:16,727 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 33 [2019-11-07 01:31:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:16,727 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2019-11-07 01:31:16,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:31:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2019-11-07 01:31:16,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-07 01:31:16,729 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:16,729 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:16,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:16,942 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:16,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1677613489, now seen corresponding path program 4 times [2019-11-07 01:31:16,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:16,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124651751] [2019-11-07 01:31:16,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:17,446 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 01:31:17,446 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124651751] [2019-11-07 01:31:17,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289811748] [2019-11-07 01:31:17,447 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 01:31:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:17,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:31:17,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:31:17,585 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 01:31:17,585 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:31:18,376 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 01:31:18,377 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784320688] [2019-11-07 01:31:18,381 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-11-07 01:31:18,382 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:31:18,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:31:18,387 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:31:18,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:31:18,438 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:31:18,646 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:31:18,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:31:18,663 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:31:19,030 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:31:19,031 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-11-07 01:31:19,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082131883] [2019-11-07 01:31:19,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:31:19,033 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:31:19,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:31:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:31:19,036 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 59 states. [2019-11-07 01:31:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:31:22,374 INFO L93 Difference]: Finished difference Result 157 states and 210 transitions. [2019-11-07 01:31:22,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:31:22,375 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 57 [2019-11-07 01:31:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:31:22,377 INFO L225 Difference]: With dead ends: 157 [2019-11-07 01:31:22,377 INFO L226 Difference]: Without dead ends: 121 [2019-11-07 01:31:22,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2827 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3607, Invalid=8825, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:31:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-07 01:31:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2019-11-07 01:31:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-07 01:31:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2019-11-07 01:31:22,415 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 57 [2019-11-07 01:31:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:31:22,417 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2019-11-07 01:31:22,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:31:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2019-11-07 01:31:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-07 01:31:22,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:31:22,422 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:31:22,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:31:22,628 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:31:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:31:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash 437017423, now seen corresponding path program 5 times [2019-11-07 01:31:22,630 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:31:22,630 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179159053] [2019-11-07 01:31:22,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:31:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:31:23,822 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 01:31:23,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179159053] [2019-11-07 01:31:23,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693867513] [2019-11-07 01:31:23,823 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