/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/loops/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:02:45,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:02:45,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:02:45,849 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:02:45,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:02:45,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:02:45,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:02:45,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:02:45,856 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:02:45,857 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:02:45,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:02:45,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:02:45,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:02:45,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:02:45,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:02:45,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:02:45,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:02:45,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:02:45,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:02:45,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:02:45,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:02:45,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:02:45,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:02:45,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:02:45,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:02:45,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:02:45,883 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:02:45,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:02:45,884 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 04:02:45,899 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:02:45,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:02:45,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:02:45,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:02:45,901 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:02:45,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:02:45,901 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:02:45,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:02:45,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:02:45,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:02:45,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:02:45,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:02:45,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:02:45,903 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:02:45,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:02:45,903 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:02:45,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:02:45,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:02:45,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:02:45,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:02:45,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:02:45,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:02:45,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:02:45,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:02:45,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:02:45,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:02:45,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:02:45,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:02:45,906 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 04:02:46,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:02:46,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:02:46,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:02:46,260 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:02:46,261 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:02:46,262 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2019-11-07 04:02:46,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bc37288/1bfc04817c754a7898e9295ccee0122b/FLAG0ee765763 [2019-11-07 04:02:46,768 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:02:46,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-2.c [2019-11-07 04:02:46,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bc37288/1bfc04817c754a7898e9295ccee0122b/FLAG0ee765763 [2019-11-07 04:02:47,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25bc37288/1bfc04817c754a7898e9295ccee0122b [2019-11-07 04:02:47,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:02:47,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:02:47,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:02:47,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:02:47,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:02:47,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:02:47" (1/1) ... [2019-11-07 04:02:47,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fbc0dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47, skipping insertion in model container [2019-11-07 04:02:47,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:02:47" (1/1) ... [2019-11-07 04:02:47,259 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:02:47,309 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:02:47,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:02:47,529 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:02:47,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:02:47,713 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:02:47,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47 WrapperNode [2019-11-07 04:02:47,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:02:47,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:02:47,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:02:47,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:02:47,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47" (1/1) ... [2019-11-07 04:02:47,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47" (1/1) ... [2019-11-07 04:02:47,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47" (1/1) ... [2019-11-07 04:02:47,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47" (1/1) ... [2019-11-07 04:02:47,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47" (1/1) ... [2019-11-07 04:02:47,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47" (1/1) ... [2019-11-07 04:02:47,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47" (1/1) ... [2019-11-07 04:02:47,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:02:47,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:02:47,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:02:47,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:02:47,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47" (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 04:02:47,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:02:47,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:02:47,830 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 04:02:47,830 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:02:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:02:47,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:02:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:02:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:02:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-07 04:02:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:02:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:02:47,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:02:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:02:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:02:48,371 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:02:48,371 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 04:02:48,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:02:48 BoogieIcfgContainer [2019-11-07 04:02:48,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:02:48,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:02:48,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:02:48,378 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:02:48,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:02:47" (1/3) ... [2019-11-07 04:02:48,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d2a901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:02:48, skipping insertion in model container [2019-11-07 04:02:48,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:02:47" (2/3) ... [2019-11-07 04:02:48,380 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77d2a901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:02:48, skipping insertion in model container [2019-11-07 04:02:48,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:02:48" (3/3) ... [2019-11-07 04:02:48,383 INFO L109 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2019-11-07 04:02:48,393 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:02:48,402 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:02:48,415 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:02:48,443 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:02:48,443 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:02:48,443 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:02:48,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:02:48,444 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:02:48,444 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:02:48,444 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:02:48,445 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:02:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 04:02:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 04:02:48,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:48,465 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:48,467 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1108608161, now seen corresponding path program 1 times [2019-11-07 04:02:48,481 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:48,481 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738764837] [2019-11-07 04:02:48,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:48,751 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 04:02:48,753 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738764837] [2019-11-07 04:02:48,754 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:02:48,756 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:02:48,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560519723] [2019-11-07 04:02:48,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:02:48,765 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:02:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:02:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:02:48,783 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 04:02:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:02:48,848 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2019-11-07 04:02:48,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:02:48,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 04:02:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:02:48,862 INFO L225 Difference]: With dead ends: 41 [2019-11-07 04:02:48,862 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 04:02:48,868 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 04:02:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 04:02:48,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 04:02:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 04:02:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-07 04:02:48,911 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2019-11-07 04:02:48,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:02:48,912 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-07 04:02:48,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:02:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-07 04:02:48,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 04:02:48,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:48,914 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:48,914 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:48,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:48,915 INFO L82 PathProgramCache]: Analyzing trace with hash -84964102, now seen corresponding path program 1 times [2019-11-07 04:02:48,915 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:48,915 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732711130] [2019-11-07 04:02:48,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 04:02:49,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732711130] [2019-11-07 04:02:49,005 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:02:49,005 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:02:49,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560105473] [2019-11-07 04:02:49,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:02:49,009 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:02:49,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:02:49,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:02:49,010 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 4 states. [2019-11-07 04:02:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:02:49,078 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2019-11-07 04:02:49,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:02:49,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-07 04:02:49,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:02:49,082 INFO L225 Difference]: With dead ends: 38 [2019-11-07 04:02:49,082 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 04:02:49,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:02:49,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 04:02:49,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2019-11-07 04:02:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 04:02:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 04:02:49,109 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2019-11-07 04:02:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:02:49,110 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 04:02:49,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:02:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 04:02:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 04:02:49,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:49,112 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:49,112 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:49,113 INFO L82 PathProgramCache]: Analyzing trace with hash -991237889, now seen corresponding path program 1 times [2019-11-07 04:02:49,113 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:49,114 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504659567] [2019-11-07 04:02:49,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 04:02:49,261 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504659567] [2019-11-07 04:02:49,261 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:02:49,262 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:02:49,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701726821] [2019-11-07 04:02:49,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:02:49,267 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:02:49,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:02:49,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:02:49,268 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2019-11-07 04:02:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:02:49,314 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2019-11-07 04:02:49,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:02:49,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-07 04:02:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:02:49,317 INFO L225 Difference]: With dead ends: 35 [2019-11-07 04:02:49,317 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 04:02:49,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:02:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 04:02:49,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 04:02:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 04:02:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 04:02:49,329 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2019-11-07 04:02:49,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:02:49,329 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 04:02:49,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:02:49,329 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 04:02:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 04:02:49,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:49,331 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:49,334 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:49,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:49,334 INFO L82 PathProgramCache]: Analyzing trace with hash -652249821, now seen corresponding path program 1 times [2019-11-07 04:02:49,335 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:49,335 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574361905] [2019-11-07 04:02:49,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:02:49,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574361905] [2019-11-07 04:02:49,468 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:02:49,469 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 04:02:49,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649389329] [2019-11-07 04:02:49,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 04:02:49,470 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:02:49,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 04:02:49,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:02:49,470 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2019-11-07 04:02:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:02:49,543 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-11-07 04:02:49,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:02:49,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-07 04:02:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:02:49,546 INFO L225 Difference]: With dead ends: 38 [2019-11-07 04:02:49,546 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 04:02:49,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 04:02:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 04:02:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2019-11-07 04:02:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-07 04:02:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-07 04:02:49,564 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 17 [2019-11-07 04:02:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:02:49,564 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-07 04:02:49,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 04:02:49,566 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-07 04:02:49,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 04:02:49,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:02:49,567 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:02:49,567 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:02:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:02:49,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1771118706, now seen corresponding path program 1 times [2019-11-07 04:02:49,568 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:02:49,568 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004607970] [2019-11-07 04:02:49,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:02:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:02:49,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004607970] [2019-11-07 04:02:49,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231372107] [2019-11-07 04:02:49,650 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 04:02:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:02:49,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 04:02:49,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:02:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:02:49,800 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:02:49,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:02:49,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [914832024] [2019-11-07 04:02:49,864 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-07 04:02:49,864 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:02:49,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:02:49,887 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:02:49,888 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:02:50,053 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 26 for LOIs [2019-11-07 04:02:50,249 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 421 [2019-11-07 04:02:50,510 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 437 DAG size of output: 437 [2019-11-07 04:02:50,839 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 472 [2019-11-07 04:02:51,437 WARN L191 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2019-11-07 04:02:51,730 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2019-11-07 04:02:57,631 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 169776 conjuctions. This might take some time...