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_copy9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:16,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:16,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:16,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:16,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:16,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:16,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:16,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:16,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:16,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:16,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:16,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:16,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:16,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:16,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:16,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:16,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:16,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:16,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:16,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:16,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:16,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:16,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:16,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:16,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:16,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:16,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:16,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:16,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:33:16,350 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:16,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:16,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:16,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:16,352 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:16,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:16,353 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:16,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:16,353 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:16,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:16,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:16,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:16,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:16,354 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:16,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:16,355 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:16,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:16,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:16,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:16,356 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:16,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:16,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:16,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:16,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:16,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:16,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:16,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:16,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:16,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:33:16,647 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:16,669 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:16,673 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:16,675 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:16,676 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:16,677 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-10-15 01:33:16,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e519a18f/0e3d5b93cd0b43a580a87ffa03194646/FLAGc2f7337e9 [2019-10-15 01:33:17,220 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:17,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy9_ground-1.i [2019-10-15 01:33:17,232 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e519a18f/0e3d5b93cd0b43a580a87ffa03194646/FLAGc2f7337e9 [2019-10-15 01:33:17,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e519a18f/0e3d5b93cd0b43a580a87ffa03194646 [2019-10-15 01:33:17,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:17,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:17,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:17,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:17,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:17,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@644c4853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:17, skipping insertion in model container [2019-10-15 01:33:17,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:17" (1/1) ... [2019-10-15 01:33:17,630 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:17,655 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:17,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:17,886 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:18,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:18,065 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:18,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18 WrapperNode [2019-10-15 01:33:18,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:18,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:18,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:18,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:18,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,148 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... [2019-10-15 01:33:18,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:18,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:18,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:18,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:18,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:18,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:18,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:18,228 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:18,228 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:18,229 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:18,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:18,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:33:18,230 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:18,945 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:18,945 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-10-15 01:33:18,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:18 BoogieIcfgContainer [2019-10-15 01:33:18,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:18,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:18,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:18,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:18,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:17" (1/3) ... [2019-10-15 01:33:18,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27304b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:18, skipping insertion in model container [2019-10-15 01:33:18,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:18" (2/3) ... [2019-10-15 01:33:18,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27304b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:18, skipping insertion in model container [2019-10-15 01:33:18,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:18" (3/3) ... [2019-10-15 01:33:18,956 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-1.i [2019-10-15 01:33:18,965 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:18,973 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:18,984 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:19,012 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:19,012 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:19,013 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:19,013 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:19,013 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:19,013 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:19,014 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:19,014 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-15 01:33:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:33:19,037 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:19,038 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:19,040 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:19,046 INFO L82 PathProgramCache]: Analyzing trace with hash 943724403, now seen corresponding path program 1 times [2019-10-15 01:33:19,055 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:19,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058653131] [2019-10-15 01:33:19,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:19,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058653131] [2019-10-15 01:33:19,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:19,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:19,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366369363] [2019-10-15 01:33:19,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:19,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:19,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:19,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:19,286 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-15 01:33:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:19,328 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2019-10-15 01:33:19,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:19,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-15 01:33:19,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:19,340 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:33:19,340 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 01:33:19,344 INFO L600 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 [2019-10-15 01:33:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 01:33:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 01:33:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:33:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2019-10-15 01:33:19,397 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 20 [2019-10-15 01:33:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:19,397 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2019-10-15 01:33:19,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2019-10-15 01:33:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:33:19,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:19,399 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:19,399 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:19,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:19,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1563711792, now seen corresponding path program 1 times [2019-10-15 01:33:19,400 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:19,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837069116] [2019-10-15 01:33:19,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:33:19,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837069116] [2019-10-15 01:33:19,475 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:19,475 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:19,475 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436059495] [2019-10-15 01:33:19,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:19,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:19,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:19,478 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 3 states. [2019-10-15 01:33:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:19,588 INFO L93 Difference]: Finished difference Result 51 states and 78 transitions. [2019-10-15 01:33:19,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:19,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-15 01:33:19,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:19,592 INFO L225 Difference]: With dead ends: 51 [2019-10-15 01:33:19,592 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:33:19,594 INFO L600 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 [2019-10-15 01:33:19,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:33:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-15 01:33:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:33:19,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2019-10-15 01:33:19,608 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 21 [2019-10-15 01:33:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:19,609 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2019-10-15 01:33:19,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2019-10-15 01:33:19,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:33:19,611 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:19,611 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:19,612 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:19,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:19,613 INFO L82 PathProgramCache]: Analyzing trace with hash -168556700, now seen corresponding path program 1 times [2019-10-15 01:33:19,614 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:19,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181303584] [2019-10-15 01:33:19,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:19,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:33:19,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181303584] [2019-10-15 01:33:19,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504079873] [2019-10-15 01:33:19,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:19,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:19,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:33:19,987 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:33:20,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771716870] [2019-10-15 01:33:20,044 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:20,044 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:20,051 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:20,059 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:20,060 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:20,238 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:20,783 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:21,111 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:21,686 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:21,964 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:22,231 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:22,983 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:22,996 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:23,005 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:23,287 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:23,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:33:23,288 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874869302] [2019-10-15 01:33:23,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:23,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:23,291 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 17 states. [2019-10-15 01:33:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:23,965 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2019-10-15 01:33:23,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:23,967 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2019-10-15 01:33:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:23,969 INFO L225 Difference]: With dead ends: 73 [2019-10-15 01:33:23,969 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:33:23,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:33:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-10-15 01:33:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:33:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2019-10-15 01:33:23,987 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 30 [2019-10-15 01:33:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:23,987 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2019-10-15 01:33:23,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:23,988 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2019-10-15 01:33:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:33:23,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:23,990 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:24,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:24,193 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:24,194 INFO L82 PathProgramCache]: Analyzing trace with hash -299252415, now seen corresponding path program 2 times [2019-10-15 01:33:24,195 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:24,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608487455] [2019-10-15 01:33:24,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:24,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:24,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:33:24,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608487455] [2019-10-15 01:33:24,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893459217] [2019-10-15 01:33:24,307 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 [2019-10-15 01:33:24,415 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:33:24,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:24,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:24,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:33:24,431 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:33:24,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2020739709] [2019-10-15 01:33:24,453 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:24,453 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:24,454 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:24,455 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:24,455 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:24,492 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:26,419 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:26,428 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:26,431 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:26,700 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:26,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:33:26,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126550234] [2019-10-15 01:33:26,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:26,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:26,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:26,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:26,702 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand 17 states. [2019-10-15 01:33:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:27,505 INFO L93 Difference]: Finished difference Result 98 states and 143 transitions. [2019-10-15 01:33:27,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:27,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2019-10-15 01:33:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:27,507 INFO L225 Difference]: With dead ends: 98 [2019-10-15 01:33:27,507 INFO L226 Difference]: Without dead ends: 73 [2019-10-15 01:33:27,508 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-15 01:33:27,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-10-15 01:33:27,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-15 01:33:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2019-10-15 01:33:27,521 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 33 [2019-10-15 01:33:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:27,521 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2019-10-15 01:33:27,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2019-10-15 01:33:27,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 01:33:27,523 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:27,523 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:27,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:27,727 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash -728873293, now seen corresponding path program 3 times [2019-10-15 01:33:27,728 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:27,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692027964] [2019-10-15 01:33:27,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,728 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:27,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692027964] [2019-10-15 01:33:27,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42678421] [2019-10-15 01:33:27,942 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 [2019-10-15 01:33:28,072 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:28,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:28,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:28,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:28,122 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-15 01:33:28,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806918059] [2019-10-15 01:33:28,202 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:28,202 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:28,202 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:28,203 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:28,203 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:28,220 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:28,889 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:30,200 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:30,212 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:30,215 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:30,549 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:30,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 27 [2019-10-15 01:33:30,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711595179] [2019-10-15 01:33:30,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-15 01:33:30,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:30,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-15 01:33:30,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:33:30,553 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 27 states. [2019-10-15 01:33:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:31,766 INFO L93 Difference]: Finished difference Result 142 states and 176 transitions. [2019-10-15 01:33:31,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-15 01:33:31,774 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2019-10-15 01:33:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:31,775 INFO L225 Difference]: With dead ends: 142 [2019-10-15 01:33:31,775 INFO L226 Difference]: Without dead ends: 88 [2019-10-15 01:33:31,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=2003, Unknown=0, NotChecked=0, Total=2352 [2019-10-15 01:33:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-10-15 01:33:31,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2019-10-15 01:33:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-15 01:33:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2019-10-15 01:33:31,799 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 60 [2019-10-15 01:33:31,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:31,799 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2019-10-15 01:33:31,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-15 01:33:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2019-10-15 01:33:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-15 01:33:31,802 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:31,802 INFO L380 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:32,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:32,007 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:32,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:32,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1290344095, now seen corresponding path program 4 times [2019-10-15 01:33:32,009 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:32,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87734963] [2019-10-15 01:33:32,009 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:32,010 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:32,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-10-15 01:33:32,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87734963] [2019-10-15 01:33:32,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516374951] [2019-10-15 01:33:32,258 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 [2019-10-15 01:33:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:32,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:33:32,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-10-15 01:33:32,518 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-10-15 01:33:32,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1239344584] [2019-10-15 01:33:32,790 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:32,790 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:32,791 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:32,792 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:32,792 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:32,816 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:34,724 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:34,732 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:34,738 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:35,037 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:35,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:33:35,038 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57106890] [2019-10-15 01:33:35,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:35,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:35,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:35,041 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 35 states. [2019-10-15 01:33:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:36,396 INFO L93 Difference]: Finished difference Result 163 states and 194 transitions. [2019-10-15 01:33:36,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:36,398 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2019-10-15 01:33:36,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:36,400 INFO L225 Difference]: With dead ends: 163 [2019-10-15 01:33:36,400 INFO L226 Difference]: Without dead ends: 100 [2019-10-15 01:33:36,402 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=934, Invalid=3098, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-10-15 01:33:36,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2019-10-15 01:33:36,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-15 01:33:36,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2019-10-15 01:33:36,426 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 75 [2019-10-15 01:33:36,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:36,428 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2019-10-15 01:33:36,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:36,428 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2019-10-15 01:33:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-15 01:33:36,435 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:36,435 INFO L380 BasicCegarLoop]: trace histogram [22, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:36,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:36,636 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2108998751, now seen corresponding path program 5 times [2019-10-15 01:33:36,636 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:36,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660720331] [2019-10-15 01:33:36,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:36,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:36,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-10-15 01:33:37,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660720331] [2019-10-15 01:33:37,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533335435] [2019-10-15 01:33:37,043 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:40,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:33:40,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:40,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 45 conjunts are in the unsatisfiable core [2019-10-15 01:33:40,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 15 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2019-10-15 01:33:40,728 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2019-10-15 01:33:40,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2024119333] [2019-10-15 01:33:40,891 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:40,892 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:40,892 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:40,893 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:40,893 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:40,913 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:41,805 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:33:42,853 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:42,861 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:42,864 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:43,262 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:43,262 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10, 8, 11] total 49 [2019-10-15 01:33:43,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676488806] [2019-10-15 01:33:43,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-10-15 01:33:43,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:43,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-10-15 01:33:43,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=1894, Unknown=0, NotChecked=0, Total=2352 [2019-10-15 01:33:43,266 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 49 states. [2019-10-15 01:33:46,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:46,358 INFO L93 Difference]: Finished difference Result 227 states and 310 transitions. [2019-10-15 01:33:46,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-10-15 01:33:46,367 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 87 [2019-10-15 01:33:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:46,368 INFO L225 Difference]: With dead ends: 227 [2019-10-15 01:33:46,368 INFO L226 Difference]: Without dead ends: 164 [2019-10-15 01:33:46,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1433, Invalid=7123, Unknown=0, NotChecked=0, Total=8556 [2019-10-15 01:33:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-15 01:33:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2019-10-15 01:33:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-15 01:33:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 165 transitions. [2019-10-15 01:33:46,398 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 165 transitions. Word has length 87 [2019-10-15 01:33:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:46,399 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 165 transitions. [2019-10-15 01:33:46,399 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-10-15 01:33:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 165 transitions. [2019-10-15 01:33:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 01:33:46,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:46,402 INFO L380 BasicCegarLoop]: trace histogram [23, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:46,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:46,603 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:46,604 INFO L82 PathProgramCache]: Analyzing trace with hash 803430864, now seen corresponding path program 6 times [2019-10-15 01:33:46,604 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:46,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280545600] [2019-10-15 01:33:46,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:46,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:46,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-10-15 01:33:47,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280545600] [2019-10-15 01:33:47,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571195666] [2019-10-15 01:33:47,050 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:47,311 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:47,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:47,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 01:33:47,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-10-15 01:33:47,376 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 978 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-10-15 01:33:48,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1988446844] [2019-10-15 01:33:48,283 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:33:48,283 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:48,284 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:48,285 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:48,285 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:48,304 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:49,131 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2019-10-15 01:33:50,086 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:33:50,094 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:50,096 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:50,552 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:50,553 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 11] total 61 [2019-10-15 01:33:50,553 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447150552] [2019-10-15 01:33:50,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 01:33:50,554 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 01:33:50,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1304, Invalid=2356, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 01:33:50,556 INFO L87 Difference]: Start difference. First operand 155 states and 165 transitions. Second operand 61 states. [2019-10-15 01:33:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:53,350 INFO L93 Difference]: Finished difference Result 315 states and 359 transitions. [2019-10-15 01:33:53,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-10-15 01:33:53,352 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 151 [2019-10-15 01:33:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:53,353 INFO L225 Difference]: With dead ends: 315 [2019-10-15 01:33:53,353 INFO L226 Difference]: Without dead ends: 189 [2019-10-15 01:33:53,359 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3807, Invalid=9533, Unknown=0, NotChecked=0, Total=13340 [2019-10-15 01:33:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-10-15 01:33:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 180. [2019-10-15 01:33:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-10-15 01:33:53,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 190 transitions. [2019-10-15 01:33:53,377 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 190 transitions. Word has length 151 [2019-10-15 01:33:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:53,378 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 190 transitions. [2019-10-15 01:33:53,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-15 01:33:53,378 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 190 transitions. [2019-10-15 01:33:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-15 01:33:53,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:53,380 INFO L380 BasicCegarLoop]: trace histogram [48, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:53,585 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:53,586 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:53,586 INFO L82 PathProgramCache]: Analyzing trace with hash 357844595, now seen corresponding path program 7 times [2019-10-15 01:33:53,587 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:53,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65805142] [2019-10-15 01:33:53,587 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:53,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:53,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-10-15 01:33:54,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65805142] [2019-10-15 01:33:54,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045533086] [2019-10-15 01:33:54,712 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:55,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-15 01:33:55,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-10-15 01:33:55,101 INFO L321 TraceCheckSpWp]: Computing backward predicates...