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_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:18,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:18,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:18,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:18,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:18,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:18,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:18,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:18,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:18,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:18,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:18,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:18,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:18,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:18,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:18,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:18,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:18,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:18,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:18,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:18,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:18,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:18,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:18,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:18,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:18,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:18,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:18,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:18,090 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 01:34:18,105 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:18,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:18,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:18,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:18,107 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:18,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:18,108 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:18,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:18,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:18,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:18,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:18,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:18,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:18,109 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:18,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:18,110 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:18,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:18,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:18,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:18,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:18,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:18,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:18,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:18,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:18,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:18,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:18,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:18,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:18,112 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 01:34:18,399 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:18,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:18,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:18,424 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:18,425 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:18,425 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-10-15 01:34:18,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a690bd502/5ecd0009a9e4427db2abee71f3e7204c/FLAG88dd1f5e2 [2019-10-15 01:34:18,956 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:18,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-10-15 01:34:18,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a690bd502/5ecd0009a9e4427db2abee71f3e7204c/FLAG88dd1f5e2 [2019-10-15 01:34:19,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a690bd502/5ecd0009a9e4427db2abee71f3e7204c [2019-10-15 01:34:19,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:19,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:19,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:19,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:19,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:19,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ea1475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19, skipping insertion in model container [2019-10-15 01:34:19,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,321 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:19,344 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:19,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:19,555 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:19,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:19,686 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:19,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19 WrapperNode [2019-10-15 01:34:19,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:19,688 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:19,688 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:19,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:19,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,729 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19" (1/1) ... [2019-10-15 01:34:19,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:19,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:19,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:19,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:19,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19" (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 01:34:19,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:19,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:19,808 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:19,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:19,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:19,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:20,270 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:20,270 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-10-15 01:34:20,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:20 BoogieIcfgContainer [2019-10-15 01:34:20,272 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:20,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:20,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:20,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:20,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:19" (1/3) ... [2019-10-15 01:34:20,277 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b8a46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:20, skipping insertion in model container [2019-10-15 01:34:20,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:19" (2/3) ... [2019-10-15 01:34:20,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56b8a46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:20, skipping insertion in model container [2019-10-15 01:34:20,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:20" (3/3) ... [2019-10-15 01:34:20,280 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2019-10-15 01:34:20,290 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:20,297 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:20,307 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:20,330 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:20,331 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:20,331 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:20,331 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:20,331 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:20,331 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:20,331 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:20,331 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-15 01:34:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:34:20,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:20,353 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:20,354 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:20,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1757541528, now seen corresponding path program 1 times [2019-10-15 01:34:20,367 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:20,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014341699] [2019-10-15 01:34:20,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:20,527 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 01:34:20,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014341699] [2019-10-15 01:34:20,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:20,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:20,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814193651] [2019-10-15 01:34:20,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:20,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:20,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:20,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:20,549 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-15 01:34:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:20,647 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2019-10-15 01:34:20,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:20,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-15 01:34:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:20,658 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:34:20,659 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 01:34:20,663 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 01:34:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 01:34:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 01:34:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:34:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-10-15 01:34:20,709 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2019-10-15 01:34:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:20,709 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-10-15 01:34:20,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-10-15 01:34:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:34:20,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:20,712 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] [2019-10-15 01:34:20,712 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash -69039878, now seen corresponding path program 1 times [2019-10-15 01:34:20,713 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:20,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877433575] [2019-10-15 01:34:20,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,714 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:34:20,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877433575] [2019-10-15 01:34:20,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021395233] [2019-10-15 01:34:20,848 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 01:34:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:20,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:20,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:34:20,994 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:34:21,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261026004] [2019-10-15 01:34:21,052 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:34:21,052 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:21,060 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:21,069 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:21,070 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:21,272 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:23,000 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:23,019 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:23,025 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:23,734 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:23,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:23,735 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954776701] [2019-10-15 01:34:23,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:23,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:23,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:23,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:23,743 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 17 states. [2019-10-15 01:34:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:24,641 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-10-15 01:34:24,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:24,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2019-10-15 01:34:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:24,643 INFO L225 Difference]: With dead ends: 93 [2019-10-15 01:34:24,643 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:34:24,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 62 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:34:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2019-10-15 01:34:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-15 01:34:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2019-10-15 01:34:24,659 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 28 [2019-10-15 01:34:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:24,660 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2019-10-15 01:34:24,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2019-10-15 01:34:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-15 01:34:24,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:24,662 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:34:24,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:24,869 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:24,869 INFO L82 PathProgramCache]: Analyzing trace with hash -384842776, now seen corresponding path program 2 times [2019-10-15 01:34:24,870 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:24,870 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755471031] [2019-10-15 01:34:24,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:24,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:24,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-15 01:34:25,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755471031] [2019-10-15 01:34:25,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289887893] [2019-10-15 01:34:25,040 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 01:34:25,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:25,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:25,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:25,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-15 01:34:25,238 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-15 01:34:25,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353874006] [2019-10-15 01:34:25,302 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:34:25,302 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:25,303 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:25,304 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:25,304 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:25,345 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:26,333 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:26,341 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:26,344 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:27,268 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:27,268 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:27,269 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131210381] [2019-10-15 01:34:27,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:27,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:27,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:27,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:27,271 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 23 states. [2019-10-15 01:34:28,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:28,565 INFO L93 Difference]: Finished difference Result 171 states and 242 transitions. [2019-10-15 01:34:28,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:28,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2019-10-15 01:34:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:28,569 INFO L225 Difference]: With dead ends: 171 [2019-10-15 01:34:28,569 INFO L226 Difference]: Without dead ends: 122 [2019-10-15 01:34:28,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 122 SyntacticMatches, 40 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:28,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-15 01:34:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2019-10-15 01:34:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-15 01:34:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2019-10-15 01:34:28,590 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 55 [2019-10-15 01:34:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:28,590 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2019-10-15 01:34:28,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2019-10-15 01:34:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-15 01:34:28,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:28,594 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:28,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:28,800 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:28,800 INFO L82 PathProgramCache]: Analyzing trace with hash 471908520, now seen corresponding path program 3 times [2019-10-15 01:34:28,801 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:28,801 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686090191] [2019-10-15 01:34:28,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:28,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-10-15 01:34:29,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686090191] [2019-10-15 01:34:29,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700873886] [2019-10-15 01:34:29,088 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 01:34:29,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:29,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:29,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:29,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-10-15 01:34:29,253 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-10-15 01:34:29,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1952486417] [2019-10-15 01:34:29,457 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:34:29,457 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:29,458 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:29,458 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:29,458 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:29,485 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:30,219 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:30,225 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:30,227 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:31,912 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:31,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:31,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698635025] [2019-10-15 01:34:31,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:31,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:31,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:31,916 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 35 states. [2019-10-15 01:34:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:34,211 INFO L93 Difference]: Finished difference Result 327 states and 452 transitions. [2019-10-15 01:34:34,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:34,212 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 109 [2019-10-15 01:34:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:34,216 INFO L225 Difference]: With dead ends: 327 [2019-10-15 01:34:34,216 INFO L226 Difference]: Without dead ends: 230 [2019-10-15 01:34:34,219 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 219 SyntacticMatches, 88 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4087 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-10-15 01:34:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2019-10-15 01:34:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-10-15 01:34:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2019-10-15 01:34:34,249 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 109 [2019-10-15 01:34:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:34,250 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2019-10-15 01:34:34,250 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2019-10-15 01:34:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-15 01:34:34,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:34,255 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:34,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:34,461 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:34,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:34,462 INFO L82 PathProgramCache]: Analyzing trace with hash -324154840, now seen corresponding path program 4 times [2019-10-15 01:34:34,463 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:34,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501797751] [2019-10-15 01:34:34,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:34,464 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:34,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-10-15 01:34:35,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501797751] [2019-10-15 01:34:35,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582589184] [2019-10-15 01:34:35,116 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 01:34:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:35,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:35,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-10-15 01:34:35,428 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-10-15 01:34:36,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [367974418] [2019-10-15 01:34:36,342 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:34:36,342 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:36,343 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:36,343 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:36,343 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:36,365 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:37,063 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:37,069 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:37,072 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:40,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:40,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:40,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419512375] [2019-10-15 01:34:40,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:40,985 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:40,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:40,987 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 59 states. [2019-10-15 01:34:46,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:46,374 INFO L93 Difference]: Finished difference Result 639 states and 872 transitions. [2019-10-15 01:34:46,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:46,374 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 217 [2019-10-15 01:34:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:46,378 INFO L225 Difference]: With dead ends: 639 [2019-10-15 01:34:46,378 INFO L226 Difference]: Without dead ends: 446 [2019-10-15 01:34:46,383 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 435 SyntacticMatches, 184 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15817 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2019-10-15 01:34:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 437. [2019-10-15 01:34:46,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-15 01:34:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 446 transitions. [2019-10-15 01:34:46,434 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 446 transitions. Word has length 217 [2019-10-15 01:34:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:46,434 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 446 transitions. [2019-10-15 01:34:46,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:46,435 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 446 transitions. [2019-10-15 01:34:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2019-10-15 01:34:46,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:46,444 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:46,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:46,652 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:46,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:46,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2107907368, now seen corresponding path program 5 times [2019-10-15 01:34:46,652 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:46,653 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495973326] [2019-10-15 01:34:46,653 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:46,653 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:46,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9729 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 8648 trivial. 0 not checked. [2019-10-15 01:34:48,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495973326] [2019-10-15 01:34:48,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994326558] [2019-10-15 01:34:48,406 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