/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:28:06,850 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:28:06,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:28:06,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:28:06,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:28:06,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:28:06,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:28:06,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:28:06,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:28:06,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:28:06,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:28:06,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:28:06,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:28:06,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:28:06,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:28:06,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:28:06,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:28:06,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:28:06,906 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 01:28:06,925 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:28:06,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:28:06,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:28:06,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:28:06,927 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:28:06,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:28:06,928 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:28:06,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:28:06,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:28:06,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:28:06,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:28:06,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:28:06,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:28:06,929 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:28:06,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:28:06,930 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:28:06,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:28:06,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:28:06,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:28:06,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:28:06,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:28:06,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:28:06,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:28:06,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:28:06,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:28:06,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:28:06,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:28:06,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:28:06,932 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 01:28:07,219 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:28:07,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:28:07,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:28:07,244 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:28:07,244 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:28:07,245 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i [2019-11-07 01:28:07,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5edf1cb2f/cf0fee0a6c9f4fa591f0c50c9969daf4/FLAG562d589d5 [2019-11-07 01:28:07,851 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:28:07,852 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_vector_difference_ground.i [2019-11-07 01:28:07,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5edf1cb2f/cf0fee0a6c9f4fa591f0c50c9969daf4/FLAG562d589d5 [2019-11-07 01:28:08,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5edf1cb2f/cf0fee0a6c9f4fa591f0c50c9969daf4 [2019-11-07 01:28:08,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:28:08,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:28:08,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:08,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:28:08,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:28:08,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc8cdaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08, skipping insertion in model container [2019-11-07 01:28:08,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,233 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:28:08,247 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:28:08,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:08,438 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:28:08,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:08,489 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:28:08,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08 WrapperNode [2019-11-07 01:28:08,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:08,490 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:28:08,490 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:28:08,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:28:08,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,591 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:28:08,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:28:08,618 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:28:08,618 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:28:08,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08" (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 01:28:08,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:28:08,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:28:08,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:28:08,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:28:08,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:28:08,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:28:08,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:28:08,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:28:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:28:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:28:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:28:08,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:28:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:28:08,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:28:09,049 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:28:09,050 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:28:09,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:09 BoogieIcfgContainer [2019-11-07 01:28:09,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:28:09,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:28:09,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:28:09,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:28:09,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:28:08" (1/3) ... [2019-11-07 01:28:09,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0fa8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:09, skipping insertion in model container [2019-11-07 01:28:09,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08" (2/3) ... [2019-11-07 01:28:09,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e0fa8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:09, skipping insertion in model container [2019-11-07 01:28:09,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:09" (3/3) ... [2019-11-07 01:28:09,059 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_vector_difference_ground.i [2019-11-07 01:28:09,073 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:28:09,081 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:28:09,091 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:28:09,113 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:28:09,113 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:28:09,114 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:28:09,114 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:28:09,114 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:28:09,114 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:28:09,114 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:28:09,114 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:28:09,128 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 01:28:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:28:09,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:09,134 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:09,136 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:09,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:09,141 INFO L82 PathProgramCache]: Analyzing trace with hash -830750246, now seen corresponding path program 1 times [2019-11-07 01:28:09,148 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:09,149 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974840338] [2019-11-07 01:28:09,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:09,313 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 01:28:09,313 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974840338] [2019-11-07 01:28:09,314 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:28:09,315 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:28:09,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594045214] [2019-11-07 01:28:09,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:28:09,322 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:09,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:28:09,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:28:09,339 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-07 01:28:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:09,390 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-11-07 01:28:09,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:28:09,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:28:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:09,404 INFO L225 Difference]: With dead ends: 34 [2019-11-07 01:28:09,405 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:28:09,411 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 01:28:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:28:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:28:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:28:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 01:28:09,455 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-11-07 01:28:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:09,456 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 01:28:09,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:28:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 01:28:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:28:09,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:09,457 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:09,458 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:09,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1504950251, now seen corresponding path program 1 times [2019-11-07 01:28:09,459 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:09,459 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263417658] [2019-11-07 01:28:09,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:09,550 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 01:28:09,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263417658] [2019-11-07 01:28:09,551 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954528467] [2019-11-07 01:28:09,551 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 01:28:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:09,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:28:09,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:09,662 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 01:28:09,663 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:09,697 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 01:28:09,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645093019] [2019-11-07 01:28:09,726 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:28:09,726 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:09,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:09,741 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:09,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:09,923 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:10,425 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2019-11-07 01:28:10,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:10,449 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:10,768 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:10,768 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 16 [2019-11-07 01:28:10,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843479536] [2019-11-07 01:28:10,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-07 01:28:10,772 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-07 01:28:10,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-07 01:28:10,774 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2019-11-07 01:28:12,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:12,165 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-11-07 01:28:12,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 01:28:12,165 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-11-07 01:28:12,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:12,167 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:28:12,167 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 01:28:12,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2019-11-07 01:28:12,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 01:28:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-11-07 01:28:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:28:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-07 01:28:12,177 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-11-07 01:28:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:12,178 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-07 01:28:12,178 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-07 01:28:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-07 01:28:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:28:12,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:12,179 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:12,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:12,384 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash -578674534, now seen corresponding path program 2 times [2019-11-07 01:28:12,391 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:12,391 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986404233] [2019-11-07 01:28:12,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:12,699 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 01:28:12,700 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986404233] [2019-11-07 01:28:12,701 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122518514] [2019-11-07 01:28:12,701 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 01:28:12,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:28:12,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:28:12,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:28:12,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:12,792 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 01:28:12,792 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:12,853 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 01:28:12,853 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510496512] [2019-11-07 01:28:12,854 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:28:12,855 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:12,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:12,855 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:12,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:12,898 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:15,235 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2019-11-07 01:28:15,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:15,246 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:15,516 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:15,517 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 22 [2019-11-07 01:28:15,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359918812] [2019-11-07 01:28:15,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 01:28:15,518 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 01:28:15,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2019-11-07 01:28:15,519 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 22 states. [2019-11-07 01:28:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:17,146 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2019-11-07 01:28:17,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:28:17,147 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 20 [2019-11-07 01:28:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:17,148 INFO L225 Difference]: With dead ends: 59 [2019-11-07 01:28:17,148 INFO L226 Difference]: Without dead ends: 45 [2019-11-07 01:28:17,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 01:28:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-07 01:28:17,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2019-11-07 01:28:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 01:28:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-07 01:28:17,160 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2019-11-07 01:28:17,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:17,160 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-07 01:28:17,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 01:28:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-07 01:28:17,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:28:17,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:17,162 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:17,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:17,367 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:17,367 INFO L82 PathProgramCache]: Analyzing trace with hash 642400954, now seen corresponding path program 3 times [2019-11-07 01:28:17,367 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:17,368 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629771825] [2019-11-07 01:28:17,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:17,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:17,845 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 01:28:17,845 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629771825] [2019-11-07 01:28:17,845 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143038107] [2019-11-07 01:28:17,846 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 01:28:17,925 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:28:17,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:28:17,927 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:28:17,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:17,953 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 01:28:17,953 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:18,141 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 01:28:18,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1463192992] [2019-11-07 01:28:18,143 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:28:18,143 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:18,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:18,144 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:18,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:18,170 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:18,457 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2019-11-07 01:28:18,478 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:18,480 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:18,805 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:18,805 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 34 [2019-11-07 01:28:18,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286226950] [2019-11-07 01:28:18,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-07 01:28:18,807 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:18,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-07 01:28:18,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 01:28:18,810 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 34 states. [2019-11-07 01:28:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:20,982 INFO L93 Difference]: Finished difference Result 89 states and 116 transitions. [2019-11-07 01:28:20,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-07 01:28:20,982 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 32 [2019-11-07 01:28:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:20,984 INFO L225 Difference]: With dead ends: 89 [2019-11-07 01:28:20,985 INFO L226 Difference]: Without dead ends: 69 [2019-11-07 01:28:20,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=922, Invalid=2860, Unknown=0, NotChecked=0, Total=3782 [2019-11-07 01:28:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-07 01:28:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-11-07 01:28:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-07 01:28:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-07 01:28:20,999 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2019-11-07 01:28:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:20,999 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-07 01:28:21,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-07 01:28:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-07 01:28:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-07 01:28:21,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:21,002 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:21,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:21,206 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:21,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1898852614, now seen corresponding path program 4 times [2019-11-07 01:28:21,207 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:21,207 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134512889] [2019-11-07 01:28:21,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:21,725 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 01:28:21,725 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134512889] [2019-11-07 01:28:21,726 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163362971] [2019-11-07 01:28:21,726 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 01:28:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:21,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:28:21,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:21,856 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 01:28:21,856 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:22,523 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 01:28:22,524 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169704947] [2019-11-07 01:28:22,525 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:28:22,525 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:22,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:22,526 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:22,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:22,552 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:22,800 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2019-11-07 01:28:22,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:22,809 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:23,223 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:23,223 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 58 [2019-11-07 01:28:23,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396890489] [2019-11-07 01:28:23,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-07 01:28:23,226 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:23,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-07 01:28:23,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2019-11-07 01:28:23,228 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 58 states. [2019-11-07 01:28:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:27,187 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2019-11-07 01:28:27,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-07 01:28:27,188 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 56 [2019-11-07 01:28:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:27,189 INFO L225 Difference]: With dead ends: 149 [2019-11-07 01:28:27,191 INFO L226 Difference]: Without dead ends: 117 [2019-11-07 01:28:27,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3502, Invalid=8488, Unknown=0, NotChecked=0, Total=11990 [2019-11-07 01:28:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-07 01:28:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2019-11-07 01:28:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-07 01:28:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-11-07 01:28:27,229 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2019-11-07 01:28:27,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:27,229 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-11-07 01:28:27,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-07 01:28:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-11-07 01:28:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-07 01:28:27,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:27,236 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:27,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:27,436 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1092221062, now seen corresponding path program 5 times [2019-11-07 01:28:27,437 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:27,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050482359] [2019-11-07 01:28:27,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:29,295 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 01:28:29,295 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050482359] [2019-11-07 01:28:29,295 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937570844] [2019-11-07 01:28:29,296 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